plug commutator
11electrical parts and devices — Synonyms and related words: alternator, anode, armature, autoconverter, autostarter, autotransformer, battery charger, brush, cap, capacitor, cathode, charger, choking coil, coil, commutator, compensator, condenser, controller, converter,… …
12relay — Synonyms and related words: Le Mans, adder, air race, alternator, analytical control unit, analyzer, anchor watch, anode, armature, assign, autoconverter, automobile race, autostarter, autotransformer, battery charger, bicycle race, bit, boat… …
13Perforated sheets — The method of perforated sheets was a cryptologic technique used by the Polish Cipher Bureau before World War II, and during the war by British cryptologists at Bletchley Park, to decrypt messages enciphered on German Enigma machines. The… …
14Spark-gap transmitter — A spark gap transmitter is a device for generating radio frequency electromagnetic waves. These devices served as the transmitters for most wireless telegraphy systems for the first three decades of radio (1887 ndash;1916) and the first… …
15Grill (cryptology) — The grill ( pl. ruszt), in cryptology, was a method used, chiefly early on, by the mathematician cryptologists of the Polish Cipher Bureau in decrypting German Enigma machine ciphers.The grill method was described by Marian Rejewski as being… …
16Oscilloscope history — This article discusses the history and gradual development of the Oscilloscope. Contents 1 Hand drawn oscillograms 2 Automatic paper drawn oscillograph 3 Photographic oscillograph 4 …
17electricity — I (New American Roget s College Thesaurus) An entity of nature with positive and negative parts Nouns 1. electricity, electric[al] power; electromagnetism, electromotion; electrical engineering, electronics, magnetics; electrolysis. 2. electric… …
18brush — [1] A paintbrush. See airbrush. [2] The pieces of carbon, or copper, that rub against the commutator on the generator or starter motor or against the slip rings on an alternator. As they wear down, they need to be replaced. Also see carbon brush… …
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