light+apparatus

A suction apparatus used on a roughing-out plant for separating light chaff from the heavier seed.

1) (anything that is burning, whether accidentally or not: a warm fire in the kitchen; Several houses were destroyed in a fire.) feu

2) (an apparatus for heating: a gas fire; an electric fire.) radiateur

3) (the heat and light produced by burning: Fire is one of man's greatest benefits.) feu

4) (enthusiasm: with fire in his heart.) ardeur

5) (attack by gunfire: The soldiers were under fire.) (essuyer le) feu

1) ((of china, pottery etc) to heat in an oven, or kiln, in order to harden and strengthen: The ceramic pots must be fired.) cuire

2) (to make (someone) enthusiastic; to inspire: The story fired his imagination.) enflammer

3) (to operate (a gun etc) by discharging a bullet etc from it: He fired his revolver three times.) faire feu

4) (to send out or discharge (a bullet etc) from a gun etc: He fired three bullets at the target.) tirer

5) ((often with at or on) to aim and operate a gun at; to shoot at: They suddenly fired on us; She fired at the target.) tirer (sur)

6) (to send away someone from his/her job; to dismiss: He was fired from his last job for being late.) renvoyer

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- fire alarm

1) (anything that is burning, whether accidentally or not: a warm fire in the kitchen; Several houses were destroyed in a fire.) fogo

2) (an apparatus for heating: a gas fire; an electric fire.) aquecedor

3) (the heat and light produced by burning: Fire is one of man's greatest benefits.) fogo

4) (enthusiasm: with fire in his heart.) ardor

5) (attack by gunfire: The soldiers were under fire.) fogo

1) ((of china, pottery etc) to heat in an oven, or kiln, in order to harden and strengthen: The ceramic pots must be fired.) queimar, cozer

2) (to make (someone) enthusiastic; to inspire: The story fired his imagination.) inflamar

3) (to operate (a gun etc) by discharging a bullet etc from it: He fired his revolver three times.) disparar

4) (to send out or discharge (a bullet etc) from a gun etc: He fired three bullets at the target.) atirar

5) ((often with at or on) to aim and operate a gun at; to shoot at: They suddenly fired on us; She fired at the target.) atirar

6) (to send away someone from his/her job; to dismiss: He was fired from his last job for being late.) demitir

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- fire alarm

SUBJECT AREA: Electricity, Public utilities

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Brush graduated from the University of Michigan in 1869 and worked for several years as a chemist. Believing that electric arc lighting would be commercially successful if the equipment could be improved, he completed his first dynamo in 1875 and a simplified arc lamp. His original system operated a maximum of four lights, each on a separate circuit, from one dynamo. Brush envisaged a wider market for his product and by 1879 had available on arc lighting system principally intended for street and other outdoor illumination. He designed a dynamo that generated a high voltage and which, with a carbon-pile regulator, provided an almost constant current permitting the use of up to forty lamps on one circuit. He also improved arc lamps by incorporating a slipping-clutch regulating mechanism and automatic means of bringing into use a second set of carbons, thereby doubling the period between replacements.

Brush's multiple electric arc lighting system was first demonstrated in Cleveland and by 1880 had been adopted in a number of American cities, including New York, Boston and Philadelphia. It was also employed in many European towns until incandescent lamps, for which the Brush dynamo was unsuitable, came into use. To market his apparatus, Brush promoted local lighting companies and thereby secured local capital.

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See also: Hammond, Robert

SUBJECT AREA: Electricity, Land transport, Public utilities, Railways and locomotives

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Leo Daft, son of a British civil engineer, studied electricity and emigrated to the USA in 1866. After various occupations including running a photographic studio, he joined in 1879 the New York Electric Light Company, which was soon merged into the Daft Electric Company. This company developed electrically powered machinery and built electric-power plants. In 1883 Daft built an electric locomotive called Ampere for the Saratoga \& Mount McGregor Railroad. This is said to have been the first electric main-line locomotive for standard gauge. It collected current from a central rail, had an output of 12 hp (9 kW) and hauled 10 tons at speeds up to 9 mph (14.5 km/h). Two years later Daft made a much improved locomotive for the New York Elevated Railway, the Benjamin Franklin, which drew current at 250 volts from a central rail and had two 48 in. (122 cm)-diameter driving wheels and two 33 in. (84 cm)-diameter trailing wheels. Re-equipped in 1888 with four driving wheels and a 125 hp (93 kW) motor, this could haul an eight-car train at 10 mph (16 km/h). Meanwhile, in 1884, Daft's company had manufactured all the electrical apparatus for the Massachusetts Electric Power Company, the first instance of a complete central station to generate and distribute electricity for power on a commercial scale. In 1885 it electrified a branch of the Baltimore Union Passenger Railway, the first electrically operated railway in the USA. Subsequently Daft invented a process for vulcanizing rubber onto metal that came into general use. He never became an American citizen.

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See also: Siemens, Dr Ernst Werner von

SUBJECT AREA: Photography, film and optics

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Dickson was born in France of English and Scottish parents. As a young man of almost 19 years, he wrote in 1879 to Thomas Edison in America, asking for a job. Edison replied that he was not taking on new staff at that time, but Dickson, with his mother and sisters, decided to emigrate anyway. In 1883 he contacted Edison again, and was given a job at the Goerk Street laboratory of the Edison Electric Works in New York. He soon assumed a position of responsibility as Superintendent, working on the development of electric light and power systems, and also carried out most of the photography Edison required. In 1888 he moved to the Edison West Orange laboratory, becoming Head of the ore-milling department. When Edison, inspired by Muybridge's sequence photographs of humans and animals in motion, decided to develop a motion picture apparatus, he gave the task to Dickson, whose considerable skills in mechanics, photography and electrical work made him the obvious choice. The first experiments, in 1888, were on a cylinder machine like the phonograph, in which the sequence pictures were to be taken in a spiral. This soon proved to be impractical, and work was delayed for a time while Dickson developed a new ore-milling machine. Little progress with the movie project was made until George Eastman's introduction in July 1889 of celluloid roll film, which was thin, tough, transparent and very flexible. Dickson returned to his experiments in the spring of 1891 and soon had working models of a film camera and viewer, the latter being demonstrated at the West Orange laboratory on 20 May 1891. By the early summer of 1892 the project had advanced sufficiently for commercial exploitation to begin. The Kinetograph camera used perforated 35 mm film (essentially the same as that still in use in the late twentieth century), and the kinetoscope, a peep-show viewer, took fifty feet of film running in an endless loop. Full-scale manufacture of the viewers started in 1893, and they were demonstrated on a number of occasions during that year. On 14 April 1894 the first kinetoscope parlour, with ten viewers, was opened to the public in New York. By the end of that year, the kinetoscope was seen by the public all over America and in Europe. Dickson had created the first commercially successful cinematograph system. Dickson left Edison's employment on 2 April 1895, and for a time worked with Woodville Latham on the development of his Panoptikon projector, a projection version of the kinetoscope. In December 1895 he joined with Herman Casier, Henry N.Marvin and Elias Koopman to form the American Mutoscope Company. Casier had designed the Mutoscope, an animated-picture viewer in which the sequences of pictures were printed on cards fixed radially to a drum and were flipped past the eye as the drum rotated. Dickson designed the Biograph wide-film camera to produce the picture sequences, and also a projector to show the films directly onto a screen. The large-format images gave pictures of high quality for the period; the Biograph went on public show in America in September 1896, and subsequently throughout the world, operating until around 1905. In May 1897 Dickson returned to England and set up as a producer of Biograph films, recording, among other subjects, Queen Victoria's Diamond Jubilee celebrations in 1897, Pope Leo XIII in 1898, and scenes of the Boer War in 1899 and 1900. Many of the Biograph subjects were printed as reels for the Mutoscope to produce the "what the butler saw" machines which were a feature of fairgrounds and seaside arcades until modern times. Dickson's contact with the Biograph Company, and with it his involvement in cinematography, ceased in 1911.

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SUBJECT AREA: Civil engineering, Mining and extraction technology

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Greathead came to England in 1859 to complete his education. In 1864 he began a three-year pupillage with the civil engineer Peter W. Barlow, after which he was engaged as an assistant engineer on the extension of the Midland Railway from Bedford to London. In 1869 he was entrusted with the construction of the Tower Subway under the River Thames; this was carried out using a cylindrical wrought-iron shield which was forced forward by six large screws as material was excavated in front of it. This work was completed the same year. In 1870 he set himself up as a consulting engineer, and from 1873 he was Resident Engineer on the Hammersmith and Richmond extensions of the Metropolitan District Railway. He assisted in the preparation of several other railway projects including the Regent's Canal Railway in 1880, the Dagenham Dock and the Metropolitan Outer Circle Railways in 1881, a new line from London to Eastbourne and a number of Irish light railways. He worked on a bill for the City and South London Railway, which was built between 1886 and 1890; here compressed air was used to prevent the inrush of water, a method for tunnelling which was generally adopted from then on. He invented apparatus for the application of water to excavate in front of the shield as well as for injecting cement-grout behind the lining of the tunnel.

He was joint engineer with Sir Douglas Fox for the construction of the Liverpool Overhead Railway, and held the same post with W.R.Galbraith on the Waterloo and City Railway; he was also associated with Sir John Fowler and Sir Benjamin Baker in the construction of the Central London Railway. He died, aged 52, before the completion of some of these projects.

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SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering, Public utilities

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He was the third child and the eldest of three boys born to John Murdoch and Anna Bruce. His father, a millwright and joiner, spelled his name Murdock on moving to England. He was educated for some years at Old Cumnock Parish School and in 1777, with his father, he built a "wooden horse", supposed to have been a form of cycle. In 1777 he set out for the Soho manufactory of Boulton \& Watt, where he quickly found employment, Boulton supposedly being impressed by the lad's hat. This was oval and made of wood, and young William had turned it himself on a lathe of his own manufacture. Murdock quickly became Boulton \& Watt's representative in Cornwall, where there was a flourishing demand for steam-engines. He lived at Redruth during this period.

It is said that a number of the inventions generally ascribed to James Watt are in fact as much due to Murdock as to Watt. Examples are the piston and slide valve and the sun-and-planet gearing. A number of other inventions are attributed to Murdock alone: typical of these is the oscillating cylinder engine which obviated the need for an overhead beam.

In about 1784 he planned a steam-driven road carriage of which he made a working model. He also planned a high-pressure non-condensing engine. The model carriage was demonstrated before Murdock's friends and travelled at a speed of 6–8 mph (10–13 km/h). Boulton and Watt were both antagonistic to their employees' developing independent inventions, and when in 1786 Murdock set out with his model for the Patent Office, having received no reply to a letter he had sent to Watt, Boulton intercepted him on the open road near Exeter and dissuaded him from going any further.

In 1785 he married Mary Painter, daughter of a mine captain. She bore him four children, two of whom died in infancy, those surviving eventually joining their father at the Soho Works. Murdock was a great believer in pneumatic power: he had a pneumatic bell-push at Sycamore House, his home near Soho. The pattern-makers lathe at the Soho Works worked for thirty-five years from an air motor. He also conceived the idea of a vacuum piston engine to exhaust a pipe, later developed by the London Pneumatic Despatch Company's railway and the forerunner of the atmospheric railway.

Another field in which Murdock was a pioneer was the gas industry. In 1791, in Redruth, he was experimenting with different feedstocks in his home-cum-office in Cross Street: of wood, peat and coal, he preferred the last. He designed and built in the backyard of his house a prototype generator, washer, storage and distribution plant, and publicized the efficiency of coal gas as an illuminant by using it to light his own home. In 1794 or 1795 he informed Boulton and Watt of his experimental work and of its success, suggesting that a patent should be applied for. James Watt Junior was now in the firm and was against patenting the idea since they had had so much trouble with previous patents and had been involved in so much litigation. He refused Murdock's request and for a short time Murdock left the firm to go home to his father's mill. Boulton \& Watt soon recognized the loss of a valuable servant and, in a short time, he was again employed at Soho, now as Engineer and Superintendent at the increased salary of £300 per year plus a 1 per cent commission. From this income, he left £14,000 when he died in 1839.

In 1798 the workshops of Boulton and Watt were permanently lit by gas, starting with the foundry building. The 180 ft (55 m) façade of the Soho works was illuminated by gas for the Peace of Paris in June 1814. By 1804, Murdock had brought his apparatus to a point where Boulton \& Watt were able to canvas for orders. Murdock continued with the company after the death of James Watt in 1819, but retired in 1830 and continued to live at Sycamore House, Handsworth, near Birmingham.

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