block apparatus

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• block and tackle — Tackle Tac kle (?; sometimes improperly pronounced ?, especially by seamen), n. [OE. takel, akin to LG. & D. takel, Dan. takkel, Sw. tackel; perhaps akin to E. taw, v. t., or to take.] 1. Apparatus for raising or lowering heavy weights,… …   The Collaborative International Dictionary of English

• block — n., v., & adj. n. 1 a solid hewn or unhewn piece of hard material, esp. of rock, stone, or wood (block of ice). 2 a flat topped block used as a base for chopping, beheading, standing something on, hammering on, or for mounting a horse from. 3 a a …   Useful english dictionary

• block and tackle — Pulley Pul ley, n.; pl. {Pulleys}. [F. poulie, perhaps of Teutonic origin (cf. {Poll}, v. t.); but cf. OE. poleine, polive, pulley, LL. polanus, and F. poulain, properly, a colt, fr. L. pullus young animal, foal (cf. {Pullet}, {Foal}). For the… …   The Collaborative International Dictionary of English

• Melting point apparatus — A Fisher Johns apparatus A melting point apparatus is a scientific instrument used to determine the melting point of a substance. Some types of melting point apparatuses include the Thiele tube, Fisher Johns apparatus, Gallenkamp (Electronic)… …   Wikipedia

• Pulley block — Pulley Pul ley, n.; pl. {Pulleys}. [F. poulie, perhaps of Teutonic origin (cf. {Poll}, v. t.); but cf. OE. poleine, polive, pulley, LL. polanus, and F. poulain, properly, a colt, fr. L. pullus young animal, foal (cf. {Pullet}, {Foal}). For the… …   The Collaborative International Dictionary of English

• Jack block — Jack Jack (j[a^]k), n. [F. Jacques James, L. Jacobus, Gr. ?, Heb. Ya aq[=o]b Jacob; prop., seizing by the heel; hence, a supplanter. Cf. {Jacobite}, {Jockey}.] [1913 Webster] 1. A familiar nickname of, or substitute for, John. [1913 Webster] You… …   The Collaborative International Dictionary of English

• Brake block — Brake Brake (br[=a]k), n. [OE. brake; cf. LG. brake an instrument for breaking flax, G. breche, fr. the root of E. break. See Break, v. t., and cf. {Breach}.] 1. An instrument or machine to break or bruise the woody part of flax or hemp so that… …   The Collaborative International Dictionary of English

• Salt block — Salt Salt, a. [Compar. {Salter}; superl. {Saltest}.] [AS. sealt, salt. See {Salt}, n.] 1. Of or relating to salt; abounding in, or containing, salt; prepared or preserved with, or tasting of, salt; salted; as, salt beef; salt water. Salt tears.… …   The Collaborative International Dictionary of English

• Radio Electronic Token Block — is a system of railway signalling used in the United Kingdom. It is a development of the physical token system for controlling traffic on single lines. How it works On arrival at a token exchange point , the driver reports his/her position to the …   Wikipedia

• Barnes rail crash — infobox UK rail accident title= Barnes rail crash location map|Greater London|label=|position=left|width=290|lat=51.465580 |long= 0.238422|caption=|float=right date= 2 December 1955 location= Barnes line = cause= signalman error trains= 2 pax=… …   Wikipedia

• South Croydon rail crash — infobox UK rail accident title= South Croydon rail crash date= 24 October 1947 location= South Croydon line = Southern Railway cause= Signalman error trains= 2 pax= 1,800 deaths= 32 injuries= The South Croydon rail crash on the British railway… …   Wikipedia