American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 574
e usual break-wheel, amis the auxiliary magnet placed within SB. When this magnets armature al is at-tracted the rod r is raised, lifting the lever l, and thus starting the clock-work whichoperates the break-wheel in the usual manner. The auxiliary box AB is provided with an accessible hook h… … ToCe/t/rajL GAMEWELL AUXILIARY FIRE ALARM CIRCUITS. THEORY. circuit is completed through the small battery b. The current from this battery is,however, too weak to operate the auxiliary magnet am in the street box. Whenthe lever l in the auxiliary box is pulled down, as in case of fire, the moment…
Telegraph
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