Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 270
back of the commutator, withthe strips of metal which carry the current to the brushes on the front THE SYSTEM OF THE WESTERN ELECTRIC COMPANY 247 side (shown at the right). The front has three conducting strips, eachof which is perforated by holes and slots of varying dimensions. Thesetake part in… … Fig. 212.—Clutch mechanism. zontal disc for each sequence switch. On the shaft of the switch is adisc whose end is near the disc on the drive shaft. A stationary electro-magnet is capable of magnetizing these two discs, drawing them intocontact, and thereby causing a clutch action, rotating the…
Telephone
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