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 272
Fig. 214.—Sequence switches mounted. THE SYSTEM OF THE WESTERN ELECTRIC COMPANY 249 A single sequence switch is shown in Fig. 215. It consists of a hori-zontal shaft with many insulating discs on it. Each disc is termed a … Fig. 215.—Sequence switch and cam. cam, of which a sample is shown at the right. Four stationary springsor brushes engage each cam, and the metal mounted on it. By it manycomplicated connections can be made and broken during the progress of
Telephone
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
