second subject of power

пол. = power object

пол. объект власти, пассивный субъект власти ( пассивный агент властных отношений)

пол. = power object

1) (passing of an examination) bestandene Prüfung

2) (written permission) Ausweis, der; (for going into or out of a place also) Passierschein, der; (Mil.): (for leave) Urlaubsschein, der; (for free transportation) Freifahrschein, der; (for free admission) Freikarte, die

3) (critical position) Notlage, die

4) (Football) Pass, der (fachspr.); Ballabgabe, die; (Fencing) Ausfall, der

5)

6) (in mountains) Pass, der

1) (move onward) [Prozession:] ziehen; [Wasser:] fließen; [Gas:] strömen; (fig.) [Redner:] übergehen (to zu)

2) (go) passieren; [Zug, Reisender:] fahren ( through durch)

3) (be transported, lit. or fig.) kommen

4) (change) wechseln

5) (go by) [Fußgänger:] vorbeigehen; [Fahrer, Fahrzeug:] vorbeifahren; [Prozession:] vorbeiziehen; [Zeit, Sekunde:] vergehen; (by chance) [Person, Fahrzeug:] vorbeikommen

6) (be accepted as adequate) durchgehen; hingehen

7) (come to an end) vorbeigehen; [Fieber:] zurückgehen; [Ärger, Zorn, Sturm:] sich legen; [Gewitter, Unwetter:] vorüberziehen

8) (happen) passieren; (between persons) vorfallen

9) (be accepted) durchgehen (as als, for für)

10) (satisfy examiner) bestehen

11) (Cards) passen

1) (move past) [Fußgänger:] vorbeigehen an (+ Dat.); [Fahrer, Fahrzeug:] vorbeifahren an (+ Dat.); [Prozession:] vorbeiziehen an (+ Dat.)

2) (overtake) vorbeifahren an (+ Dat.) [Fahrzeug, Person]

3) (cross) überschreiten [Schwelle, feindliche Linien, Grenze, Marke]

4) (reach standard in) bestehen [Prüfung]

5) (approve) verabschieden [Gesetzentwurf]; annehmen [Vorschlag]; [Zensor:] freigeben [Film, Buch, Theaterstück]; bestehen lassen [Prüfungskandidaten]

6) (be too great for) überschreiten, übersteigen [Auffassungsgabe, Verständnis]

7) (move) bringen

8) (Footb. etc.) abgeben (to an + Akk.)

9) (spend) verbringen [Leben, Zeit, Tag]

10) (hand)

11) (utter) fällen, verkünden [Urteil]; machen [Bemerkung]

12) (discharge) lassen [Wasser]

- academic.ru/53812/pass_away">pass away

- pass by

- pass down

- pass for

- pass off

- pass on

- pass out

- pass over

- pass through

- pass up

* * *

1) (to move towards and then beyond (something, by going past, through, by, over etc): I pass the shops on my way to work; The procession passed along the corridor.) vorbeigehen

2) (to move, give etc from one person, state etc to another: They passed the photographs around; The tradition is passed (on/down) from father to son.) weitergeben

3) (to go or be beyond: This passes my understanding.) übersteigen

4) ((of vehicles etc on a road) to overtake: The sports car passed me at a dangerous bend in the road.) überholen

5) (to spend (time): They passed several weeks in the country.) verbringen

6) ((of an official group, government etc) to accept or approve: The government has passed a resolution.) annehmen

7) (to give or announce (a judgement or sentence): The magistrate passed judgement on the prisoner.) fällen

8) (to end or go away: His sickness soon passed.) vorübergehen

9) (to (judge to) be successful in (an examination etc): I passed my driving test.) bestehen

1) (a narrow path between mountains: a mountain pass.) der Paß

2) (a ticket or card allowing a person to do something, eg to travel free or to get in to a building: You must show your pass before entering.) der Paß

3) (a successful result in an examination, especially when below a distinction, honours etc: There were ten passes and no fails.) das Bestehen

4) ((in ball games) a throw, kick, hit etc of the ball from one player to another: The centre-forward made a pass towards the goal.) der Paß

•

- passable

* * *

[pɑ:s, AM pæs]

I. NOUN

<pl -es>

1. (road) Pass m

the Khyber \pass der Khaiberpass

mountain \pass [Gebirgs]pass m

2. SPORT (of a ball) Pass m (to auf + akk), Vorlage f (für ein Tor)

3. (sweep: by magician, conjuror) [Hand]bewegung f

the magician made some \passes with his hands over her body der Zauberer fuhr mit der Hand mehrmals über ihren Körper

4. plane

to make a \pass over sth über etw akk fliegen

the aircraft flew low in a \pass over the ski resort das Flugzeug flog sehr tief über das Skigebiet hinweg

5. ( fam: sexual advance) Annäherungsversuch m

to make a \pass at sb sich akk an jdn ranmachen, ÖSTERR bes mit jdm anbandeln fam

6. BRIT SCH, UNIV (exam success) Bestehen nt einer Prüfung; AM (grade) „Bestanden“

students just get a \pass or fail in these courses in diesen Kursen können die Studenten nur entweder bestehen oder durchfallen

to achieve grade A \passes nur Einser bekommen

to get/obtain a \pass in an exam eine Prüfung bestehen

7. (permit) Passierschein m; (for a festival) Eintritt m, Eintrittskarte f; (for public transport) [Wochen-/Monats-/Jahres-]karte f

only people with a \pass are allowed to enter the nuclear power station nur Personen mit einem entsprechenden Ausweis dürfen das Kernkraftwerk betreten

free \pass Freikarte f

disabled people have a free \pass for the public transport system Behinderte können die öffentlichen Verkehrsmittel kostenlos benutzen

8. esp AM SCH (letter of excuse) Entschuldigung f (für das Fernbleiben vom Unterricht)

9. no pl (predicament) Notlage f, kritische Lage

this is a \pass — we can't get back into the hotel da haben wir uns ja was Schönes eingebrockt — wir können nicht ins Hotel zurück fam

it has come to a pretty \pass when... es ist schon weit gekommen, wenn...

to reach a \pass außer Kontrolle geraten, ausufern

10. (in fencing) Ausfall m fachspr

II. TRANSITIVE VERB

1. (go past)

▪ to \pass sb/sth an jdm/etw vorbeigehen; (in car) an jdm/etw vorbeifahren

if you \pass a supermarket, can you get me some milk? würdest du mir Milch mitbringen, wenn du bei einem Supermarkt vorbeikommst?

2. (overtake)

▪ to \pass sb/sth jdn/etw überholen

3. (cross)

to \pass a frontier eine Grenze überqueren

not a word \passed his lips kein Wort kam über seine Lippen

4. (exceed)

▪ to \pass sth:

it \passes all belief that... es ist doch wirklich nicht zu fassen, dass...

don't buy goods which have \passed their sell-by date kauf keine Waren, deren Verfallsdatum bereits abgelaufen ist

to \pass a limit eine Grenze überschreiten

to \pass the time limit das Zeitlimit überschreiten

I'm sorry, you've \passed the time limit es tut mir leid, aber Sie haben überzogen

5. (hand to)

▪ to \pass sth to sb [or sb sth] jdm etw geben, jdm etw [herüber]reichen bes geh; (bequeath to) jdm etw vererben

could you \pass the salt please? könntest du mir bitte mal das Salz geben?

to \pass the hat [around] ( fig) den Hut herumgehen lassen fig

▪ to be \passed to sb auf jdn [o in jds Besitz] übergehen

the responsibility was gradually \passed to the British government die Verantwortung wurde nach und nach der britischen Regierung übertragen

6. (put into circulation)

to \pass money Geld in Umlauf bringen

she was caught trying to \pass forged five pound notes sie wurde dabei erwischt, als sie versuchte, mit gefälschten Fünfpfundnoten zu bezahlen

he once \passed me a forged fiver er hat mir einmal einen gefälschten Fünfer angedreht fam

7. SPORT

to \pass the ball den Ball abgeben [o abspielen]

to \pass the ball to sb jdm den Ball zuspielen

to \pass the baton to sb SPORT den Stab an jdn abgeben

the baton was \passed smoothly der Stab wurde sauber übergeben

8. (succeed)

to \pass an exam/a test eine Prüfung/eine Arbeit bestehen

to \pass muster akzeptabel sein

9. (of time)

to \pass one's days/holiday [or AM vacation] /time doing sth seine Tage/Ferien/Zeit mit etw dat verbringen

to \pass the time sich dat die Zeit vertreiben

to \pass the time of day with sb jdn [nur] kurz grüßen

I just wanted to \pass the time of day with her, but... ich wollte wirklich nur kurz guten Tag sagen und ein wenig mit ihr plaudern, doch...

10. usu passive esp POL (approve)

▪ to be \passed law verabschiedet werden

to \pass a motion einen Antrag genehmigen

“motion \passed by a clear majority” „Antrag mit deutlicher Mehrheit angenommen“

to \pass a resolution eine Resolution verabschieden

the resolution was \passed unanimously die Resolution wurde einstimmig angenommen

to \pass sb/sth as fit [or suitable] jdn/etw [als] geeignet erklären

meat \passed as fit for human consumption Fleisch, das für den Verzehr freigegeben wurde

he was \passed fit for military service er wurde für wehrdiensttauglich erklärt

the censors \passed the film as suitable for children die Zensurstelle gab den Film für Kinder frei

11. (utter)

to \pass a comment einen Kommentar abgeben

to \pass a comment on sb eine Bemerkung über jdn machen

to \pass judgement on sb/sth ein Urteil über jdn/etw fällen, über jdn/etw ein Urteil abgeben

to \pass one's opinion seine Meinung sagen

to \pass a remark eine Bemerkung machen

she's been \passing remarks about me behind my back sie ist hinter meinem Rücken über mich hergezogen

to \pass sentence [on sb] LAW das Urteil [über jdn] fällen

12. MED ( form: excrete)

to \pass blood Blut im Stuhl/Urin haben

to \pass faeces Kot ausscheiden

to \pass urine urinieren

to \pass water Wasser lassen

13. FIN

to \pass a dividend eine Dividende ausfallen lassen

▶ to \pass the buck to sb/sth ( fam) die Verantwortung auf jdn/etw abwälzen fam, jdm/etw den Schwarzen Peter zuschieben fam

III. INTRANSITIVE VERB

1. (move by) vorbeigehen, vorbeilaufen, vorbeikommen; road vorbeiführen; parade vorbeiziehen, vorüberziehen; car vorbeifahren

we often \passed on the stairs wir sind uns oft im Treppenhaus begegnet

the Queen \passed among the crowd die Königin mischte sich unter die Menge

the planes \passed noisily overhead die Flugzeuge donnerten vorbei fam

the bullet \passed between her shoulder blades die Kugel ging genau zwischen ihren Schulterblättern durch

if you \pass by a chemist... wenn du an einer Apotheke vorbeikommst...

a momentary look of anxiety \passed across his face ( fig) für einen kurzen Moment überschattete ein Ausdruck der Besorgnis seine Miene

to \pass out of sight außer Sichtweite geraten

to \pass unnoticed unbemerkt bleiben

▪ to \pass over sth plane über etw akk hinwegfliegen

▪ to \pass under sth unter etw dat hindurchgehen; (by car) unter etw dat hindurchfahren; road unter etw dat hindurchführen

2. (overtake) überholen

3. (enter) eintreten, hereinkommen

may I \pass? kann ich hereinkommen?

that helps prevent fats \passing into the bloodstream das verhindert, dass Fette in die Blutbahn gelangen

to allow sb to [or let sb] \pass jdn durchlassen

they shall not \pass! sie werden nicht durchkommen! (Kampfruf der Antifaschisten)

4. (go away) vergehen, vorübergehen, vorbeigehen

it'll soon \pass das ist bald vorüber

I felt a bit nauseous, but the feeling \passed mir war ein bisschen schlecht, aber das ging auch wieder vorbei

for a moment she thought she'd die but the moment \passed für einen kurzen Moment lang dachte sie, sie würde sterben

I let a golden opportunity \pass ich habe mir eine einmalige Gelegenheit entgehen lassen

5. (change)

▪ to \pass from sth to sth von etw dat zu etw dat übergehen

wax \passes from solid to liquid when you heat it beim Erhitzen wird festes Wachs flüssig

the water \passes from a liquid state to a solid state when frozen Wasser wird fest, wenn es gefriert

6. (transfer)

all these English words have \passed into the German language all diese englischen Wörter sind in die deutsche Sprache eingegangen

to \pass into oblivion in Vergessenheit geraten

7. (exchange)

no words have \passed between us since our divorce seit unserer Scheidung haben wir kein einziges Wort miteinander gewechselt

the looks \passing between them suggested that... die Blicke, die sie miteinander wechselten, ließen darauf schließen, dass...

greetings were \passed between them sie begrüßten sich

8. SPORT (of a ball) zuspielen, [den Ball] abgeben [o abspielen

9. SCH (succeed) bestehen, durchkommen

he \passed at the fifth attempt er bestand die Prüfung im fünften Anlauf

10. (go by) time vergehen, verstreichen

the evening \passed without incident der Abend verlief ohne Zwischenfälle

11. (not answer) passen [müssen]

\pass — I don't know the answer ich passe — ich weiß es nicht

the contestant \passed on four questions der Wettbewerbsteilnehmer musste bei vier Fragen passen

12. (forgo)

▪ to \pass on sth auf etw akk verzichten

13. (be accepted as)

I don't think you'll \pass as 18 keiner wird dir abnehmen, dass du 18 bist

do you think this jacket and trousers could \pass as a suit? meinst du, ich kann diese Jacke und die Hose als Anzug anziehen?

he could \pass as a German in our new film für unseren neuen Film könnte er als Deutscher durchgehen

14. CARDS passen

15. ( old)

and it come to \pass that... und da begab es sich, dass...

* * *

1. n

1) (= permit) Ausweis m; (MIL ETC) Passierschein m

2) (Brit UNIV) Bestehen nt einer Prüfung

3) (GEOG, SPORT) Pass m; (FTBL, for shot at goal) Vorlage f

4) (FENCING) Ausfall m

5) (= movement by conjurer, hypnotist) Bewegung f, Geste f

6)

7)

8) (AVIAT)

2. vt

1) (= move past) vorbeigehen/-fahren/-fliegen an (+dat)

2) (= overtake) athlete, car überholen

3) (= cross) frontier etc überschreiten, überqueren, passieren; deadline überschreiten

4) (= reach, hand) reichen

5)

6) (UNIV ETC) exam bestehen; candidate bestehen lassen

7)

8) (= approve) motion annehmen; plan gutheißen, genehmigen; (PARL) verabschieden

9) (SPORT)

10) forged bank notes weitergeben

11)

12) (= spend) time verbringen

13) remark von sich geben; opinion abgeben; (JUR) sentence verhängen; judgement fällen

14) (= discharge) excrement, blood absondern, ausscheiden

3. vi

1) (= move past) vorbeigehen/-fahren

2) (= overtake) überholen

3)

4) (time) vergehen; (deadline) verfallen

5) (= disappear, end anger, hope, era etc) vorübergehen, vorbeigehen; (storm) (= go over) vorüberziehen; (= abate) sich legen; (rain) vorbeigehen

6) (= be acceptable) gehen

7) (= be considered, be accepted) angesehen werden (for or as sth als etw)

8) (in exam) bestehen

9) (SPORT) abspielen

10) (CARDS) passen

11) (old

12) (US euph = die) sterben

* * *

pass [pɑːs; US pæs]

A v/t

1. a) etwas passieren, vorbei-, vorübergehen, -fahren, -fließen, -kommen, -reiten, -ziehen an (dat)

b) Tennis: jemanden passieren

2. vorbeifahren an (dat), überholen ( auch AUTO):

3. fig übergehen, -springen, keine Notiz nehmen von

4. WIRTSCH eine Dividende ausfallen lassen

5. eine Schranke, ein Hindernis passieren

6. durch-, überschreiten, durchqueren, -reiten, -reisen, -ziehen, passieren:

pass a river einen Fluss überqueren

7. durchschneiden (Linie)

8. a) ein Examen bestehen

b) einen Prüfling bestehen oder durchkommen lassen:

pass sb (as) fit ( oder ready) for work MED jemanden gesundschreiben

c) etwas durchgehen lassen

9. fig hinausgehen über (akk), übersteigen, -schreiten, -treffen:

it passes my comprehension ( oder understanding) es geht über meinen Verstand oder Horizont;

just passing seventeen gerade erst siebzehn Jahre alt

10. (durch etwas) hindurchleiten, -führen (beide, auch TECH), auch die Hand gleiten lassen:

pass a wire through a hole;

he passed his hand over his forehead er fuhr sich mit der Hand über die Stirn

11. (durch ein Sieb) passieren, durchseihen

12. vorbei-, durchlassen, passieren lassen

13. Zeit ver-, zubringen:

pass the time reading sich die Zeit mit Lesen vertreiben; → time A 4

14. einen Gegenstand reichen, geben, ( auch JUR Falschgeld) weitergeben:

pass me the salt, please reichen Sie mir bitte das Salz; → buck¹ A 8, hat Bes Redew

15. übersenden, auch einen Funkspruch befördern

16. SPORT den Ball abspielen, passen ( beide:

to zu):

pass the ball auch abspielen

17. JUR Eigentum, einen Rechtstitel übertragen, (letztwillig) zukommen lassen

18. einen Vorschlag durchbringen, -setzen, ein Gesetz verabschieden, eine Resolution annehmen

19. abgeben, übertragen:

pass the chair den Vorsitz abgeben ( to sb an jemanden)

20. rechtskräftig machen

21. (als gültig) anerkennen, gelten lassen, genehmigen

22. (on, upon) eine Meinung äußern (über akk), eine Bemerkung fallen lassen oder machen, einen Kommentar geben (zu), ein Kompliment machen:

pass criticism on Kritik üben an (dat);

pass an opinion on auch sich äußern über (akk) oder zu

23. ein Urteil abgeben, fällen, JUR auch sprechen ( alle:

on, upon über akk)

24. MED

a) Eiter, Nierensteine etc ausscheiden

b) den Darm entleeren

c) Wasser lassen

25. ein Türschloss öffnen

B v/i

1. sich (fort)bewegen, (von einem Ort zu einem andern) gehen, reiten, fahren, ziehen etc

2. vorbei-, vorübergehen, -fahren, -ziehen etc (by an dat), AUTO überholen:

let sb pass jemanden vorbei- oder durchlassen

3. fahren etc ( through durch):

it has just passed through my mind fig es ist mir eben durch den Kopf gegangen

4. übergehen (to auf akk; into the hands of in die Hände gen), übertragen werden (to auf akk), fallen (to an akk):

it passes to the heirs es geht auf die Erben über, es fällt an die Erben

5. durchkommen, (die Prüfung) bestehen

6. übergehen:

pass from a solid (in)to a liquid state vom festen in den flüssigen Zustand übergehen

7. vergehen, vorübergehen (Zeit etc, auch Schmerz etc), verstreichen (Zeit):

the pain will pass der Schmerz wird vergehen;

fashions pass Moden kommen und gehen

8. euph entschlafen

9. sich zutragen, sich abspielen, vor sich gehen, passieren:

it came to pass that … besonders BIBEL es begab sich oder es geschah, dass …;

bring sth to pass etwas bewirken

10. harsh words passed between them es fielen harte Worte zwischen ihnen oder bei ihrer Auseinandersetzung

11. (for, as) gelten (für, als), gehalten werden (für), angesehen werden (für):

he passes for a much younger man er wird für viel jünger gehalten;

this passes for gold das soll angeblich Gold sein

12. a) an-, hingehen, leidlich sein

b) durchgehen, unbeanstandet bleiben, geduldet werden:

let sth pass etwas durchgehen oder gelten lassen;

let that pass reden wir nicht mehr davon

13. PARL etc durchgehen, bewilligt oder zum Gesetz erhoben werden, Rechtskraft erlangen

14. angenommen werden, gelten, (als gültig) anerkannt werden

15. gangbar sein, Geltung finden (Grundsätze, Ideen)

16. JUR gefällt werden, ergehen (Urteil, Entscheidung)

17. MED abgehen, abgeführt oder ausgeschieden werden

18. SPORT (den Ball) abspielen oder passen (to zu):

pass back to the goalkeeper (Fußball) zum Torhüter zurückspielen

19. Kartenspiel: passen:

(I) pass! a. fig ich passe!;

I pass on that! fig da muss ich passen!

C s

1. a) (Gebirgs)Pass m:

(narrow) pass Engpass;

hold the pass fig obs sich behaupten;

sell the pass fig obs abtrünnig werden

b) Durchfahrt f

c) schiffbarer Kanal

2. a) Ausweis m, Passier-, Erlaubnisschein m

b) besonders free pass Freikarte f, BAHN etc Freifahrkarte f, -schein m

3. MIL Urlaubsschein m

4. besonders Br Bestehen n (einer Prüfung):

get a pass in physics seine Physikprüfung bestehen

5. fig

a) Schritt m, Abschnitt m

b) umg (schlimme) Lage:

things have come to a fine ( oder pretty, sorry) pass es ist ganz schön weit gekommen

6. make a pass over fig etwas überfliegen

7. a) Handbewegung f (eines Zauberkünstlers)

b) manueller (Zauber)Trick

8. Bestreichung f, Strich m (beim Hypnotisieren etc)

9. Maltechnik: Strich m

10. SPORT Pass m, Ab-, Zuspiel n:

from a pass by auf Pass von

11. Kartenspiel: Passen n

12. Fechten: Ausfall m

13. make a pass at umg Annäherungsversuche machen bei

14. TECH Durchlauf m (abgeschlossener Arbeitszyklus)

* * *

1) (passing of an examination) bestandene Prüfung

2) (written permission) Ausweis, der; (for going into or out of a place also) Passierschein, der; (Mil.): (for leave) Urlaubsschein, der; (for free transportation) Freifahrschein, der; (for free admission) Freikarte, die

3) (critical position) Notlage, die

4) (Football) Pass, der (fachspr.); Ballabgabe, die; (Fencing) Ausfall, der

5)

6) (in mountains) Pass, der

1) (move onward) [Prozession:] ziehen; [Wasser:] fließen; [Gas:] strömen; (fig.) [Redner:] übergehen (to zu)

2) (go) passieren; [Zug, Reisender:] fahren ( through durch)

3) (be transported, lit. or fig.) kommen

4) (change) wechseln

5) (go by) [Fußgänger:] vorbeigehen; [Fahrer, Fahrzeug:] vorbeifahren; [Prozession:] vorbeiziehen; [Zeit, Sekunde:] vergehen; (by chance) [Person, Fahrzeug:] vorbeikommen

6) (be accepted as adequate) durchgehen; hingehen

7) (come to an end) vorbeigehen; [Fieber:] zurückgehen; [Ärger, Zorn, Sturm:] sich legen; [Gewitter, Unwetter:] vorüberziehen

8) (happen) passieren; (between persons) vorfallen

9) (be accepted) durchgehen (as als, for für)

10) (satisfy examiner) bestehen

11) (Cards) passen

1) (move past) [Fußgänger:] vorbeigehen an (+ Dat.); [Fahrer, Fahrzeug:] vorbeifahren an (+ Dat.); [Prozession:] vorbeiziehen an (+ Dat.)

2) (overtake) vorbeifahren an (+ Dat.) [Fahrzeug, Person]

3) (cross) überschreiten [Schwelle, feindliche Linien, Grenze, Marke]

4) (reach standard in) bestehen [Prüfung]

5) (approve) verabschieden [Gesetzentwurf]; annehmen [Vorschlag]; [Zensor:] freigeben [Film, Buch, Theaterstück]; bestehen lassen [Prüfungskandidaten]

6) (be too great for) überschreiten, übersteigen [Auffassungsgabe, Verständnis]

7) (move) bringen

8) (Footb. etc.) abgeben (to an + Akk.)

9) (spend) verbringen [Leben, Zeit, Tag]

10) (hand)

11) (utter) fällen, verkünden [Urteil]; machen [Bemerkung]

12) (discharge) lassen [Wasser]

- pass away

- pass by

- pass down

- pass for

- pass off

- pass on

- pass out

- pass over

- pass through

- pass up

* * *

= Arbeitsgang m.

Ausweis -e m.

Durchgang m.

Durchlauf m.

Pass ¨-e m. (US) v.

überholen v. (by) (time) v.

verfließen (Zeit) v. (by) v.

vorbeigehen (an) v. v.

ablaufen v.

absolvieren (Prüfung) v.

passieren v.

SUBJECT AREA: Textiles

[br]

[br]

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Radcliffe was brought up in the textile industry and learned carding and spinning as a child. When he was old enough, he became a weaver. It was a time when there were not enough weavers to work up all the yarn being spun on the recently invented spinning machines, so some yarn was exported. Radcliffe regarded this as a sin; meetings were held to prohibit the export, and Radcliffe promised to use his best endeavours to discover means to work up the yarn in England. He owned a mill at Mellor and by 1801 was employing over 1,000 hand-loom weavers. He wanted to improve their efficiency so they could compete against power looms, which were beginning to be introduced at that time.

His first step was to divide up as much as possible the different weaving processes, not unlike the plan adopted by Arkwright in spinning. In order to strengthen the warp yarns made of cotton and to reduce their tendency to fray during weaving, it was customary to apply an adhesive substance such as starch paste. This was brushed on as the warp was unwound from the back beam during weaving, so only short lengths could be treated before being dried. Instead of dressing the warp in the loom as was hitherto done, Radcliffe had it dressed in a separate machine, relieving the weaver of the trouble and saving the time wasted by the method previously used. Radcliffe employed a young man names Thomas Johnson, who proved to be a clever mechanic. Radcliffe patented his inventions in Johnson's name to avoid other people, especially foreigners, finding out his ideas. He took out his first patent, for a dressing machine, in March 1803 and a second the following year. The combined result of the two patents was the introduction of a beaming machine and a dressing machine which, in addition to applying the paste to the yarns and then drying them, wound them onto a beam ready for the loom. These machines enabled the weaver to work a loom with fewer stoppages; however, Radcliffe did not anticipate that his method of sizing would soon be applied to power looms as well and lead to the commercial success of powered weaving. Other manufacturers quickly adopted Radcliffe's system, and Radcliffe himself soon had to introduce power looms in his own business.

Radcliffe improved the hand looms themselves when, with the help of Johnson, he devised a cloth taking-up motion that wound the woven cloth onto a roller automatically as the weaver operated the loom. Radcliffe and Johnson also developed the "dandy loom", which was a more compact form of hand loom and was also later adapted for weaving by power. Radcliffe was among the witnesses before the Parliamentary Committee which in 1808 awarded Edmund Cartwright a grant for his invention of the power loom. Later Radcliffe was unsuccessfully to petition Parliament for a similar reward for his contributions to the introduction of power weaving. His business affairs ultimately failed partly through his own obstinacy and his continued opposition to the export of cotton yarn. He lived to be 81 years old and was buried in Mellor churchyard.

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SUBJECT AREA: Horology

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Warren studied electrical engineering at the Boston Institute of Technology (later to become the Massachusetts Institute of Technology) and graduated in 1894. In 1912 he formed the Warren Electric Clock Company to make a battery-powered clock that he had patented a few years earlier. The name was changed to the Warren Telechron (time at a distance) Company after he had started to produce synchronous clocks.

In 1840 Charles Wheatstone had produced an electric master clock that produced an alternating current with a frequency of one cycle per second and which was used to drive slave dials. This system was not successful, but when Ferranti introduced the first alternating current power generator at Deptford in 1895 Hope-Jones saw in it a means of distributing time. This did not materialize immediately because the power generators did not control the frequency of the current with sufficient accuracy, and a reliable motor whose speed was related to this frequency was not available. In 1916 Warren solved both problems: he produced a reliable self-starting synchronous electric motor and he also made a master clock which could be used at the power station to control accurately the frequency of the supply. Initially the power-generating companies were reluctant to support the synchronous clock because it imposed a liability to control the frequency of the supply and the gain was likely to be small because it was very frugal in its use of power. However, with the advent of the grid system, when several generators were connected together, it became imperative to control the frequency; it was realized that although the power consumption of individual clocks was small, collectively it could be significant as they ran continuously. By the end of the 1930s more than half the clocks sold in the USA were of the synchronous type. The Warren synchronous clock was introduced into Great Britain in 1927, following the setting up of a grid system by the Electricity Commission.

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SUBJECT AREA: Textiles

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John Kay was the youngest of five sons of a yeoman farmer of Walmersley, near Bury, Lancashire, who died before his birth. John was apprenticed to a reedmaker, and just before he was 21 he married a daughter of John Hall of Bury and carried on his trade in that town until 1733. It is possible that his first patent, taken out in 1730, was connected with this business because it was for an engine that made mohair thread for tailors and twisted and dressed thread; such thread could have been used to bind up the reeds used in looms. He also improved the reeds by making them from metal instead of cane strips so they lasted much longer and could be made to be much finer. His next patent in 1733, was a double one. One part of it was for a batting machine to remove dust from wool by beating it with sticks, but the patent is better known for its description of the flying shuttle. Kay placed boxes to receive the shuttle at either end of the reed or sley. Across the open top of these boxes was a metal rod along which a picking peg could slide and drive the shuttle out across the loom. The pegs at each end were connected by strings to a stick that was held in the right hand of the weaver and which jerked the shuttle out of the box. The shuttle had wheels to make it "fly" across the warp more easily, and ran on a shuttle race to support and guide it. Not only was weaving speeded up, but the weaver could produce broader cloth without any aid from a second person. This invention was later adapted for the power loom. Kay moved to Colchester and entered into partnership with a baymaker named Solomon Smith and a year later was joined by William Carter of Ballingdon, Essex. His shuttle was received with considerable hostility in both Lancashire and Essex, but it was probably more his charge of 15 shillings a year for its use that roused the antagonism. From 1737 he was much involved with lawsuits to try and protect his patent, particularly the part that specified the method of winding the thread onto a fixed bobbin in the shuttle. In 1738 Kay patented a windmill for working pumps and an improved chain pump, but neither of these seems to have been successful. In 1745, with Joseph Stell of Keighley, he patented a narrow fabric loom that could be worked by power; this type may have been employed by Gartside in Manchester soon afterwards. It was probably through failure to protect his patent rights that Kay moved to France, where he arrived penniless in 1747. He went to the Dutch firm of Daniel Scalongne, woollen manufacturers, in Abbeville. The company helped him to apply for a French patent for his shuttle, but Kay wanted the exorbitant sum of £10,000. There was much discussion and eventually Kay set up a workshop in Paris, where he received a pension of 2,500 livres. However, he was to face the same problems as in England with weavers copying his shuttle without permission. In 1754 he produced two machines for making card clothing: one pierced holes in the leather, while the other cut and sharpened the wires. These were later improved by his son, Robert Kay. Kay returned to England briefly, but was back in France in 1758. He was involved with machines to card both cotton and wool and tried again to obtain support from the French Government. He was still involved with developing textile machines in 1779, when he was 75, but he must have died soon afterwards. As an inventor Kay was a genius of the first rank, but he was vain, obstinate and suspicious and was destitute of business qualities.

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SUBJECT AREA: Steam and internal combustion engines

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Sadi was the eldest son of Lazare Carnot, who was prominent as one of Napoleon's military and civil advisers. Sadi was born in the Palais du Petit Luxembourg and grew up during the Napoleonic wars. He was tutored by his father until in 1812, at the minimum age of 16, he entered the Ecole Polytechnique to study stress analysis, mechanics, descriptive geometry and chemistry. He organized the students to fight against the allies at Vincennes in 1814. He left the Polytechnique that October and went to the Ecole du Génie at Metz as a student second lieutenant. While there, he wrote several scientific papers, but on the Restoration in 1815 he was regarded with suspicion because of the support his father had given Napoleon. In 1816, on completion of his studies, Sadi became a second lieutenant in the Metz engineering regiment and spent his time in garrison duty, drawing up plans of fortifications. He seized the chance to escape from this dull routine in 1819 through an appointment to the army general staff corps in Paris, where he took leave of absence on half pay and began further courses of study at the Sorbonne, Collège de France, Ecole des Mines and the Conservatoire des Arts et Métiers. He was inter-ested in industrial development, political economy, tax reform and the fine arts.

It was not until 1821 that he began to concentrate on the steam-engine, and he soon proposed his early form of the Carnot cycle. He sought to find a general solution to cover all types of steam-engine, and reduced their operation to three basic stages: an isothermal expansion as the steam entered the cylinder; an adiabatic expansion; and an isothermal compression in the condenser. In 1824 he published his Réflexions sur la puissance motrice du feu, which was well received at the time but quickly forgotten. In it he accepted the caloric theory of heat but pointed out the impossibility of perpetual motion. His main contribution to a correct understanding of a heat engine, however, lay in his suggestion that power can be produced only where there exists a temperature difference due "not to an actual consumption of caloric but to its transportation from a warm body to a cold body". He used the analogy of a water-wheel with the water falling around its circumference. He proposed the true Carnot cycle with the addition of a final adiabatic compression in which motive power was con sumed to heat the gas to its original incoming temperature and so closed the cycle. He realized the importance of beginning with the temperature of the fire and not the steam in the boiler. These ideas were not taken up in the study of thermodynartiics until after Sadi's death when B.P.E.Clapeyron discovered his book in 1834.

In 1824 Sadi was recalled to military service as a staff captain, but he resigned in 1828 to devote his time to physics and economics. He continued his work on steam-engines and began to develop a kinetic theory of heat. In 1831 he was investigating the physical properties of gases and vapours, especially the relationship between temperature and pressure. In June 1832 he contracted scarlet fever, which was followed by "brain fever". He made a partial recovery, but that August he fell victim to a cholera epidemic to which he quickly succumbed.

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SUBJECT AREA: Architecture and building, Automotive engineering, Electricity, Electronics and information technology, Metallurgy, Photography, film and optics, Public utilities, Recording, Telecommunications

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He was the son of Samuel Edison, who was in the timber business. His schooling was delayed due to scarlet fever until 1855, when he was 8½ years old, but he was an avid reader. By the age of 14 he had a job as a newsboy on the railway from Port Huron to Detroit, a distance of sixty-three miles (101 km). He worked a fourteen-hour day with a stopover of five hours, which he spent in the Detroit Free Library. He also sold sweets on the train and, later, fruit and vegetables, and was soon making a profit of $20 a week. He then started two stores in Port Huron and used a spare freight car as a laboratory. He added a hand-printing press to produce 400 copies weekly of The Grand Trunk Herald, most of which he compiled and edited himself. He set himself to learn telegraphy from the station agent at Mount Clements, whose son he had saved from being run over by a freight car.

At the age of 16 he became a telegraphist at Port Huron. In 1863 he became railway telegraphist at the busy Stratford Junction of the Grand Trunk Railroad, arranging a clock with a notched wheel to give the hourly signal which was to prove that he was awake and at his post! He left hurriedly after failing to hold a train which was nearly involved in a head-on collision. He usually worked the night shift, allowing himself time for experiments during the day. His first invention was an arrangement of two Morse registers so that a high-speed input could be decoded at a slower speed. Moving from place to place he held many positions as a telegraphist. In Boston he invented an automatic vote recorder for Congress and patented it, but the idea was rejected. This was the first of a total of 1180 patents that he was to take out during his lifetime. After six years he resigned from the Western Union Company to devote all his time to invention, his next idea being an improved ticker-tape machine for stockbrokers. He developed a duplex telegraphy system, but this was turned down by the Western Union Company. He then moved to New York.

Edison found accommodation in the battery room of Law's Gold Reporting Company, sleeping in the cellar, and there his repair of a broken transmitter marked him as someone of special talents. His superior soon resigned, and he was promoted with a salary of $300 a month. Western Union paid him $40,000 for the sole rights on future improvements on the duplex telegraph, and he moved to Ward Street, Newark, New Jersey, where he employed a gathering of specialist engineers. Within a year, he married one of his employees, Mary Stilwell, when she was only 16: a daughter, Marion, was born in 1872, and two sons, Thomas and William, in 1876 and 1879, respectively.

He continued to work on the automatic telegraph, a device to send out messages faster than they could be tapped out by hand: that is, over fifty words per minute or so. An earlier machine by Alexander Bain worked at up to 400 words per minute, but was not good over long distances. Edison agreed to work on improving this feature of Bain's machine for the Automatic Telegraph Company (ATC) for $40,000. He improved it to a working speed of 500 words per minute and ran a test between Washington and New York. Hoping to sell their equipment to the Post Office in Britain, ATC sent Edison to England in 1873 to negotiate. A 500-word message was to be sent from Liverpool to London every half-hour for six hours, followed by tests on 2,200 miles (3,540 km) of cable at Greenwich. Only confused results were obtained due to induction in the cable, which lay coiled in a water tank. Edison returned to New York, where he worked on his quadruplex telegraph system, tests of which proved a success between New York and Albany in December 1874. Unfortunately, simultaneous negotiation with Western Union and ATC resulted in a lawsuit.

Alexander Graham Bell was granted a patent for a telephone in March 1876 while Edison was still working on the same idea. His improvements allowed the device to operate over a distance of hundreds of miles instead of only a few miles. Tests were carried out over the 106 miles (170 km) between New York and Philadelphia. Edison applied for a patent on the carbon-button transmitter in April 1877, Western Union agreeing to pay him $6,000 a year for the seventeen-year duration of the patent. In these years he was also working on the development of the electric lamp and on a duplicating machine which would make up to 3,000 copies from a stencil. In 1876–7 he moved from Newark to Menlo Park, twenty-four miles (39 km) from New York on the Pennsylvania Railway, near Elizabeth. He had bought a house there around which he built the premises that would become his "inventions factory". It was there that he began the use of his 200- page pocket notebooks, each of which lasted him about two weeks, so prolific were his ideas. When he died he left 3,400 of them filled with notes and sketches.

Late in 1877 he applied for a patent for a phonograph which was granted on 19 February 1878, and by the end of the year he had formed a company to manufacture this totally new product. At the time, Edison saw the device primarily as a business aid rather than for entertainment, rather as a dictating machine. In August 1878 he was granted a British patent. In July 1878 he tried to measure the heat from the solar corona at a solar eclipse viewed from Rawlins, Wyoming, but his "tasimeter" was too sensitive.

Probably his greatest achievement was "The Subdivision of the Electric Light" or the "glow bulb". He tried many materials for the filament before settling on carbon. He gave a demonstration of electric light by lighting up Menlo Park and inviting the public. Edison was, of course, faced with the problem of inventing and producing all the ancillaries which go to make up the electrical system of generation and distribution-meters, fuses, insulation, switches, cabling—even generators had to be designed and built; everything was new. He started a number of manufacturing companies to produce the various components needed.

In 1881 he built the world's largest generator, which weighed 27 tons, to light 1,200 lamps at the Paris Exhibition. It was later moved to England to be used in the world's first central power station with steam engine drive at Holborn Viaduct, London. In September 1882 he started up his Pearl Street Generating Station in New York, which led to a worldwide increase in the application of electric power, particularly for lighting. At the same time as these developments, he built a 1,300yd (1,190m) electric railway at Menlo Park.

On 9 August 1884 his wife died of typhoid. Using his telegraphic skills, he proposed to 19-year-old Mina Miller in Morse code while in the company of others on a train. He married her in February 1885 before buying a new house and estate at West Orange, New Jersey, building a new laboratory not far away in the Orange Valley.

Edison used direct current which was limited to around 250 volts. Alternating current was largely developed by George Westinghouse and Nicola Tesla, using transformers to step up the current to a higher voltage for long-distance transmission. The use of AC gradually overtook the Edison DC system.

In autumn 1888 he patented a form of cinephotography, the kinetoscope, obtaining film-stock from George Eastman. In 1893 he set up the first film studio, which was pivoted so as to catch the sun, with a hinged roof which could be raised. In 1894 kinetoscope parlours with "peep shows" were starting up in cities all over America. Competition came from the Latham Brothers with a screen-projection machine, which Edison answered with his "Vitascope", shown in New York in 1896. This showed pictures with accompanying sound, but there was some difficulty with synchronization. Edison also experimented with captions at this early date.

In 1880 he filed a patent for a magnetic ore separator, the first of nearly sixty. He bought up deposits of low-grade iron ore which had been developed in the north of New Jersey. The process was a commercial success until the discovery of iron-rich ore in Minnesota rendered it uneconomic and uncompetitive. In 1898 cement rock was discovered in New Village, west of West Orange. Edison bought the land and started cement manufacture, using kilns twice the normal length and using half as much fuel to heat them as the normal type of kiln. In 1893 he met Henry Ford, who was building his second car, at an Edison convention. This started him on the development of a battery for an electric car on which he made over 9,000 experiments. In 1903 he sold his patent for wireless telegraphy "for a song" to Guglielmo Marconi.

In 1910 Edison designed a prefabricated concrete house. In December 1914 fire destroyed three-quarters of the West Orange plant, but it was at once rebuilt, and with the threat of war Edison started to set up his own plants for making all the chemicals that he had previously been buying from Europe, such as carbolic acid, phenol, benzol, aniline dyes, etc. He was appointed President of the Navy Consulting Board, for whom, he said, he made some forty-five inventions, "but they were pigeonholed, every one of them". Thus did Edison find that the Navy did not take kindly to civilian interference.

In 1927 he started the Edison Botanic Research Company, founded with similar investment from Ford and Firestone with the object of finding a substitute for overseas-produced rubber. In the first year he tested no fewer than 3,327 possible plants, in the second year, over 1,400, eventually developing a variety of Golden Rod which grew to 14 ft (4.3 m) in height. However, all this effort and money was wasted, due to the discovery of synthetic rubber.

In October 1929 he was present at Henry Ford's opening of his Dearborn Museum to celebrate the fiftieth anniversary of the incandescent lamp, including a replica of the Menlo Park laboratory. He was awarded the Congressional Gold Medal and was elected to the American Academy of Sciences. He died in 1931 at his home, Glenmont; throughout the USA, lights were dimmed temporarily on the day of his funeral.

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SUBJECT AREA: Aerospace

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Messerschmitt studied engineering at the Munich Institute of Tchnology and obtained his degree in 1923. By 1926 he was Chief Designer at the Bayerische Flugzeugwerke in Augsburg. Due to the ban on military aircraft in Germany following the First World War, his early designs included gliders, light aircraft, and a series of high-wing airliners. He began to make a major impact on German aircraft design once Hitler came to power and threw off the shackles of the Treaty of Versailles, which so restricted Germany's armed forces. In 1932 he bought out the now-bankrupt Bayerische Flugzeugwerke, but initially, because of enmity between himself and the German aviation minister, was not invited to compete for an air force contract for a single-engined fighter. However, in 1934 Messerschmitt designed the Bf 108 Taifun, a small civil aircraft with a fighter-like appearance. This displayed the quality of his design and the German air ministry was forced to recognize him. As a result, he unveiled the famous Bf 109 fighter which first flew in August 1935; it was used during the Spanish Civil War in 1936–9, and was to become one of the foremost combat aircraft of the Second World War. In 1938, after several name changes, the company became Messerschmitt Aktien-Gesellschaft (and hence a change of prefix from Bf to Me). During April 1939 a Messerschmitt aircraft broke the world air-speed record at 755.14 km/h (469.32 mph): it was entered in the FAI records as a Bf 109R, but was more accurately a new design designated Me 209V-1.

During the Second World War, the 5/70P was progressively improved, and eventually almost 35,000 were built. Other successful fighters followed, such as the twin-engined Me 110 which also served as a bomber and night fighter. The Messerschmitt Me 262 twin-engined jet fighter, the first jet aircraft in the world to enter service, flew during the early years of the war, but it was never given a high priority by the High Command and only a small number were in service when the war ended. Another revolutionary Messerschmitt AG design was the Me 163 Komet, the concept of Professor Alexander Lippisch who had joined Messerschmitt's company in 1939; this was the first rocket-propelled fighter to enter service. It was a small tailless design capable of 880 km/hr (550 mph), but its duration under power was only about 10 minutes and it was very dangerous to fly. From late 1944 onwards it was used to intercept the United States Air Force bombers during their daylight raids. At the other end of the scale, Messerschmitt produced the Me 321 Gigant, a huge transport glider which was towed behind a flight of three Me 110s. Later it was equipped with six engines, but it was an easy target for allied fighters. This was a costly white elephant, as was his high-speed twin-engined Me 210 fighter-bomber project which nearly made his company bankrupt. Nevertheless, he was certainly an innovator and was much admired by Hitler, who declared that he had "the skull of a genius", because of the Me 163 Komet rocket-powered fighter and the Me 262.

At the end of the war Messerschmitt was detained by the Americans for two years. In 1952 Messerschmitt became an aviation adviser to the Spanish government, and his Bf109 was produced in Spain as the Hispano Buchon for a number of years and was powered by Rolls-Royce Merlin engines. A factory was also constructed in Egypt to produce aircraft to Messerschmitt's designs. His German company, banned from building aircraft, produced prefabricated houses, sewing machines and, from 1953 to 1962, a series of bubble-cars: the KR 175 (1953–55) and the KR 200 (1955–62) were single-cylinder three-wheeled bubble-cars, and the Tiger (1958–62) was a twin-cylinder, 500cc four-wheeler. In 1958 Messerschmitt resumed aircraft construction in Germany and later became the Honorary Chairman of the merged Messerschmitt-Bölkow-Blohm company (now part of the Franco-German Eurocopter company).

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SUBJECT AREA: Aerospace

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After receiving his education at Eton and Trinity College, Cambridge, Bacon served with C.A. Parsons at Newcastle upon Tyne from 1925 to 1940. From 1946 to 1956 he carried out research on Hydrox fuel cells at Cambridge University and was a consultant on fuel-cell design to a number of organizations throughout the rest of his life.

Sir William Grove was the first to observe that when oxygen and hydrogen were supplied to platinum electrodes immersed in sulphuric acid a current was produced in an external circuit, but he did not envisage this as a practical source of electrical energy. In the 1930s Bacon started work to develop a hydrogen-oxygen fuel cell that operated at moderate temperatures and pressures using an alkaline electrolyte. In 1940 he was appointed to a post at King's College, London, and there, with the support of the Admiralty, he started full-time experimental work on fuel cells. His brief was to produce a power source for the propulsion of submarines. The following year he was posted as a temporary experimental officer to the Anti-Submarine Experimental Establishment at Fairlie, Ayrshire, and he remained there until the end of the Second World War.

In 1946 he joined the Department of Chemical Engineering at Cambridge, receiving a small amount of money from the Electrical Research Association. Backing came six years later from the National Research and Development Corporation (NRDC), the development of the fuel cell being transferred to Marshalls of Cambridge, where Bacon was appointed Consultant.

By 1959, after almost twenty years of individual effort, he was able to demonstrate a 6 kW (8 hp) power unit capable of driving a small truck. Bacon appreciated that when substantial power was required over long periods the hydrogen-oxygen fuel cell associated with high-pressure gas storage would be more compact than conventional secondary batteries.

The development of the fuel-cell system pioneered by Bacon was stimulated by a particular need for a compact, lightweight source of power in the United States space programme. Electro-chemical generators using hydrogen-oxygen cells were chosen to provide the main supplies on the Apollo spacecraft for landing on the surface of the moon in 1969. An added advantage of the cells was that they simultaneously provided water. NRDC was largely responsible for the forma-tion of Energy Conversion Ltd, a company that was set up to exploit Bacon's patents and to manufacture fuel cells, and which was supported by British Ropes Ltd, British Petroleum and Guest, Keen \& Nettlefold Ltd at Basingstoke. Bacon was their full-time consultant. In 1971 Energy Conversion's operation was moved to the UK Atomic Energy Research Establishment at Harwell, as Fuel Cells Ltd. Bacon remained with them until he retired in 1973.

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SUBJECT AREA: Textiles

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Joseph Crossley was the second son of John, the founder of a carpet-weaving firm in Halifax. He did not figure much in public life for he was essentially a business man. It was under his direct superintendence that most of the extensions at Dean Clough Mill, Halifax, were built, and to a very great degree the successful working of the vast establishment that these mills became, covering fifteen acres, was due to him. In 1864 the firm became a limited-liability company, worth over a million pounds c.1880.

The company's vital patents for the power-driven carpet looms were taken out in his name. The first, in 1850 in the names of Joseph Crossley, George Collier and James Hudson, was for weaving carpets in a manner similar to the way velvet was woven, with the pile warp threads passing over wires. After a couple of picks of weft, a wire was inserted from the side over the main warp threads but under the pile warp threads. These were lowered and another couple of weft shoots bound in the pile warp. The pile was cut with a knife running along a slot in the top of the wire, and then the wire was removed. There was a further patent in 1851, in the name of Joseph Crossley alone, for improvements in the manufacture of Brussels and cut-pile carpets. An interesting part of this patent was the use of a partly coloured warp to make patterns in the carpets. These vital patents gave the Crossley brothers their dominance in carpet weaving; production on their power looms was six times quicker than by hand. Like his brothers, one of whom was Francis Crossley, he was a great benefactor to charities. The brothers built the Crossley Orphan Home at a cost of £50,000 and endowed it with about £3,000 a year.

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SUBJECT AREA: Textiles

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Robert Kay improved his father John's flying shuttle by inventing the drop box, in which up to four shuttles could be stored one below the other. The weaver's left hand controlled levers and catches to raise or lower the drop box in order to bring the appropriate shuttle into line with the shuttle race on the slay. The shuttle could then be driven across the loom, leaving its particular type or colour of weft. On the earliest power looms of Edmund Cartwright in 1785, and for many years later, it was possible to use only one shuttle. In 1845 Squire Diggle of Bury, Lancashire, took out a patent for mechanizing the drop box so that different types or colours of weft could be woven without the weaver attending to the shuttles. He used an endless chain on which plates of different heights could be fixed to raise the boxes to the required height; later this would be operated by either the dobby or Jacquard pattern-selecting mechanisms. He took out further patents for improvements to looms. One, in 1854, was for taking up the cloth with a positive motion. Two more, in 1858, improved his drop box mechanism: the first was for actually operating the drop box, while the second was for tappet chains which operated the timing for raising the boxes.

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SUBJECT AREA: Electricity, Ports and shipping, Public utilities

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Mavor came from a distinguished Scottish family with connections in medicine, industry and the arts. On completion of his education at Glasgow University, he joined R.J.Crompton \& Co.; then in 1883, along with William C.Muir, he established the Glasgow firm which later became well known as Mavor and Coulson. It pioneered the supply of electricity to public undertakings and equipped the first two generating stations in Scotland. Mavor and his fellow directors appreciated the potential demand by industry in Glasgow for electricity. Two industries were especially well served; first, the coal-mines, where electric lighting and power transformed efficiency and safety beyond recognition; and second, marine engineering. Here Mavor recognized the importance of the variable-speed motor in working with marine propellers which have a tighter range of efficient working speeds. In 1911 he built a 50 ft (15 m) motor launch, appropriately named Electric Arc, at Dumbarton and fitted it with an alternating-current motor driven by a petrol engine and dynamo. Within two years British shipyards were building electrically powered ships, and by the beginning of the First World War the United States Navy had a 20,000-ton collier with this new form of propulsion.

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SUBJECT AREA: Land transport, Railways and locomotives, Steam and internal combustion engines

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Trevithick's father was a tin-mine manager, and Trevithick himself, after limited formal education, developed his immense engineering talent among local mining machinery and steam-engines and found employment as a mining engineer. Tall, strong and high-spirited, he was the eternal optimist.

About 1797 it occurred to him that the separate condenser patent of James Watt could be avoided by employing "strong steam", that is steam at pressures substantially greater than atmospheric, to drive steam-engines: after use, steam could be exhausted to the atmosphere and the condenser eliminated. His first winding engine on this principle came into use in 1799, and subsequently such engines were widely used. To produce high-pressure steam, a stronger boiler was needed than the boilers then in use, in which the pressure vessel was mounted upon masonry above the fire: Trevithick designed the cylindrical boiler, with furnace tube within, from which the Cornish and later the Lancashire boilers evolved.

Simultaneously he realized that high-pressure steam enabled a compact steam-engine/boiler unit to be built: typically, the Trevithick engine comprised a cylindrical boiler with return firetube, and a cylinder recessed into the boiler. No beam intervened between connecting rod and crank. A master patent was taken out.

Such an engine was well suited to driving vehicles. Trevithick built his first steam-carriage in 1801, but after a few days' use it overturned on a rough Cornish road and was damaged beyond repair by fire. Nevertheless, it had been the first self-propelled vehicle successfully to carry passengers. His second steam-carriage was driven about the streets of London in 1803, even more successfully; however, it aroused no commercial interest. Meanwhile the Coalbrookdale Company had started to build a locomotive incorporating a Trevithick engine for its tramroads, though little is known of the outcome; however, Samuel Homfray's ironworks at Penydarren, South Wales, was already building engines to Trevithick's design, and in 1804 Trevithick built one there as a locomotive for the Penydarren Tramroad. In this, and in the London steam-carriage, exhaust steam was turned up the chimney to draw the fire. On 21 February the locomotive hauled five wagons with 10 tons of iron and seventy men for 9 miles (14 km): it was the first successful railway locomotive.

Again, there was no commercial interest, although Trevithick now had nearly fifty stationary engines completed or being built to his design under licence. He experimented with one to power a barge on the Severn and used one to power a dredger on the Thames. He became Engineer to a project to drive a tunnel beneath the Thames at Rotherhithe and was only narrowly defeated, by quicksands. Trevithick then set up, in 1808, a circular tramroad track in London and upon it demonstrated to the admission-fee-paying public the locomotive Catch me who can, built to his design by John Hazledine and J.U. Rastrick.

In 1809, by which date Trevithick had sold all his interest in the steam-engine patent, he and Robert Dickinson, in partnership, obtained a patent for iron tanks to hold liquid cargo in ships, replacing the wooden casks then used, and started to manufacture them. In 1810, however, he was taken seriously ill with typhus for six months and had to return to Cornwall, and early in 1811 the partners were bankrupt; Trevithick was discharged from bankruptcy only in 1814.

In the meantime he continued as a steam engineer and produced a single-acting steam engine in which the cut-off could be varied to work the engine expansively by way of a three-way cock actuated by a cam. Then, in 1813, Trevithick was approached by a representative of a company set up to drain the rich but flooded silver-mines at Cerro de Pasco, Peru, at an altitude of 14,000 ft (4,300 m). Low-pressure steam engines, dependent largely upon atmospheric pressure, would not work at such an altitude, but Trevithick's high-pressure engines would. Nine engines and much other mining plant were built by Hazledine and Rastrick and despatched to Peru in 1814, and Trevithick himself followed two years later. However, the war of independence was taking place in Peru, then a Spanish colony, and no sooner had Trevithick, after immense difficulties, put everything in order at the mines then rebels arrived and broke up the machinery, for they saw the mines as a source of supply for the Spanish forces. It was only after innumerable further adventures, during which he encountered and was assisted financially by Robert Stephenson, that Trevithick eventually arrived home in Cornwall in 1827, penniless.

He petitioned Parliament for a grant in recognition of his improvements to steam-engines and boilers, without success. He was as inventive as ever though: he proposed a hydraulic power transmission system; he was consulted over steam engines for land drainage in Holland; and he suggested a 1,000 ft (305 m) high tower of gilded cast iron to commemorate the Reform Act of 1832. While working on steam propulsion of ships in 1833, he caught pneumonia, from which he died.

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See also: Blenkinsop, John

SUBJECT AREA: Broadcasting, Electricity, Electronics and information technology, Telecommunications

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After education in Sweden at the High School and University of Lund and the Royal Institution of Technology in Stockholm, Alexanderson took a postgraduate course at the Berlin-Charlottenburg Engineering College. In 1901 he began work for the Swedish C \& C Electric Company, joining the General Electric Company, Schenectady, New York, the following year. There, in 1906, together with Fessenden, he developed a series of high-power, high-frequency alternators, which had a dramatic effect on radio communications and resulted in the first real radio broadcast. His early interest in television led to working demonstrations in his own home in 1925 and at the General Electric laboratories in 1927, and to the first public demonstration of large-screen (7 ft (2.13 m) diagonal) projection TV in 1930. Another invention of significance was the "amplidyne", a sensitive manufacturing-control system subsequently used during the Second World War for controlling anti-aircraft guns. He also contributed to developments in electric propulsion and radio aerials.

He retired from General Electric in 1948, but continued television research as a consultant for the Radio Corporation of America (RCA), filing his 321st patent in 1955.

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SUBJECT AREA: Textiles

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He was the son of Benjamin and Isabel Arnold, but his mother died when he was 2 years old and after his father's second marriage he was largely left to look after himself. After attending the village school he learnt the trade of a carpenter, and following this he became a machinist. He entered the employment of Samuel Slater, but left after a few years to engage in the unsuccessful manufacture of woollen blankets. He became involved in an engineering shop, where he devised a machine for taking wool off a carding machine and making it into endless slivers or rovings for spinning. He then became associated with a cotton-spinning mill, which led to his most important invention. The carded cotton sliver had to be reduced in thickness before it could be spun on the final machines such as the mule or the waterframe. The roving, as the mass of cotton fibres was called at this stage, was thin and very delicate because it could not be twisted to give strength, as this would not allow it to be drawn out again during the next stage. In order to wind the roving on to bobbins, the speed of the bobbin had to be just right but the diameter of the bobbin increased as it was filled. Obtaining the correct reduction in speed as the circumference increased was partially solved by the use of double-coned pulleys, but the driving belt was liable to slip owing to the power that had to be transmitted.

The final solution to the problem came with the introduction of the differential drive with bevel gears or a sun-and-planet motion. Arnold had invented this compound motion in 1818 but did not think of applying it to the roving frame until 1820. It combined the direct-gearing drive from the main shaft of the machine with that from the cone-drum drive so that the latter only provided the difference between flyer and bobbin speeds, which meant that most of the transmission power was taken away from the belt. The patent for this invention was issued to Arnold on 23 January 1823 and was soon copied in Britain by Henry Houldsworth, although J.Green of Mansfield may have originated it independendy in the same year. Arnold's patent was widely infringed in America and he sued the Proprietors of the Locks and Canals, machine makers for the Lowell manufacturers, for $30,000, eventually receiving $3,500 compensation. Arnold had his own machine shop but he gave it up in 1838 and moved the Philadelphia, where he operated the Mulhausen Print Works. Around 1850 he went to Washington, DC, and became a patent attorney, remaining as such until his death. On 24 June 1856 he was granted patent for a self-setting and self-raking saw for sawing machines.

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SUBJECT AREA: Metallurgy

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He acquired a considerable knowledge of wire-making in his father's works before he took a position in 1839 at the works of James Edleston at Warrington. From there, in 1851, he went to Manchester as Manager of Richard Johnson \& Sons' wire mill, where he remained for the rest of his life. It was there that he initiated several important improvements in the manufacture of wire. These included a system of circulating puddling furnace water bottoms and sides, and a galvanizing process. His most important innovation, however, was the continuous mill for producing iron rod for wiredrawing. Previously the red-hot iron billets had to be handled repeatedly through a stand or set of rolls to reduce the billet to the required shape, with time and heat being lost at each handling. In Bedson's continuous mill, the billet entered the first of a succession of stands placed as closely to each other as possible and emerged from the final one as rod suitable for wiredrawing, without any intermediate handling. A second novel feature was that alternate rolls were arranged vertically to save turning the piece manually through a right angle. That improved the quality as well as the speed of production. Bedson's first continuous mill was erected in Manchester in 1862 and had sixteen stands in tandem. A mill on this principle had been patented the previous year by Charles While of Pontypridd, South Wales, but it was Bedson who made it work and brought it into use commercially. A difficult problem to overcome was that as the piece being rolled lengthened, its speed increased, so that each pair of rolls had to increase correspondingly. The only source of power was a steam engine working a single drive shaft, but Bedson achieved the greater speeds by using successively larger gear-wheels at each stand.

Bedson's first mill was highly successful, and a second one was erected at the Manchester works; however, its application was limited to the production of small bars, rods and sections. Nevertheless, Bedson's mill established an important principle of rolling-mill design that was to have wider applications in later years.

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SUBJECT AREA: Aerospace, Broadcasting, Electronics and information technology, Photography, film and optics, Recording, Telecommunications

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He was a very bright scholar and received a BSc in electrical technology from City and Guilds College in 1923. He joined International Western Electric (later to become Standard Telephone and Cables) in 1924 after a period as an instructor/demonstrator at City and Guilds. He was instrumental in the design of telephone measuring equipment and in international committee work for standards for long-distance telephony.

From 1929 Blumlein was employed by the Columbia Graphophone Company to develop an electric recording cutterhead that would be independent of Western Electric's patents for the system developed by Maxfield and Harrison. He attacked the problems in a most systematic fashion, and within a year he had developed a moving-coil cutterhead that was much more linear than the iron-cored systems known at the time. Eventually Blumlein designed a complete line of recording equipment, from microphone and through-power amplifiers. The design was used by Columbia; after the merger with the Gramophone Company in 1931 to form Electrical and Musical Industries Ltd (later known as EMI) it became the company standard, certainly for coarse-groove records, until c.1950.

Blumlein became interested in stereophony (binaural sound), and developed and demonstrated a complete line of equipment, from correctly placed microphones via two-channel records and stereo pick-ups to correctly placed loudspeakers. The advent of silent surfaces of vinyl records made this approach commercial from the late 1950s. His approach was independent and quite different from that of A.C. Keller.

His extreme facility for creating innovative solutions to electronic problems was used in EMI's development from 1934 to 1938 of the electronic television system, which became the BBC standard of 405 lines after the Second World War, when television broadcasting again became possible. Independent of official requirements, EMI developed a 60 MHz radar system and Blumlein was involved in the development of a centimetric radar and display system. It was during testing of this aircraft mounted equipment that he was killed in a crash.

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SUBJECT AREA: Aerospace, Electronics and information technology

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After secondary education at King Edward School, Birmingham, Boot studied physics at Birmingham University, obtaining his BSc in 1938 and PhD in 1941. With the outbreak of the Second World War, he became involved with Randall and others in the development of a source of microwave power suitable for use in radar transmitters. Following unsuccessful attempts to use klystrons, they turned to investigation of the magnetron, and by adding cavity resonators they obtained useful power on 21 February 1940 at a wavelength of 9.8 cm. By May a cavity magnetron radar system had been constructed at TRE, Swanage, and in September submarine periscopes were detected at a range of 7 miles (11 km).

In 1943 the physics department at Birmingham resumed its research in atomic physics and Boot moved to BTH at Rugby to continue development of magnetrons, but in 1945 he returned to Birmingham as Nuffield Research Fellow and helped construct the cyclotron there. Three years later he took up a post as a Principal Scientific Officer (PSO) at the Services Electronic Research Laboratories at Baldock, Hertfordshire, becoming a Senior PSO in 1954. He remained there until his retirement in 1977, variously carrying out research on microwaves, magnetrons, plasma physics and lasers.

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