Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 27
ing typewriters in recording receivedmessages. The type illustrated is capable of being turnedthrough three-fourths of a revolution, and is provided witha message clip. Relays. — A relay widely used is shown in Fig. 8. Itconsists of a horizontally mounted electromagnet, the twocores of which are… … Fig. 8. and the armature, which is mounted in front of them.This armature is pivoted at the lower end, while the upperend or tongue plays between two adjustable screws, withlocknuts, supported on the bobbin guide. An adjustableretractile spring suitably mounted keeps the armaturenormally away from…
Telegraph
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