The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 170
gnet m.These cores at the other end are attached by iron screws tothe strip of iron F (shown in section), which forms the yokeand support for some five or ten drops. In order to lessenfriction, conical bearings are used for the armature pivots. The ends of the magnet coils are soldered to the tabs… … Front Elevation Fig. 157.—Full size Fig. 155, and in length in Fig. 157), carefully insulated fromthe drops. Under the frame of each shutter a thin Germansilver spring is clamped. When a shutter falls this springis forced into contact with the wire by a small projection,and at night this wire and…
Telephone
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