American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 560
to the starting hook sfi in SB, it will be observed that, if the verticalrod R IS raised hiirh enouofh, it will come in contact with lever l and start the clock-work. The lower end of R rests on the cam k. The cam is rigidly attached to thepeculiarly shaped lever a, so that, as the right hand end… … GAMEWELL GARDINER NON-INTERFERING FIRE ALARM STREET BOX, WITHOUT AUXILIARY ATTACHMENTS. as shown. On the lower end of the armature lever, l, is a small cross-piece cp facingthe spurs on a. At rest, namely when am is demagnetize(i, as, owing to the shuntaround it, normally, it is, the lowermost spur…
Telegraph
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