Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 233
cket or arm is supported on an upriglitsecured to the roof board of the switch-board cabinet. The flexiblecords forming- a portion of the circuit of the transmitter pass overpullejs at each end of the arm and through holes in the roof boardwhere counter-weights serve to balance the weight of the… … FIG. 194.—OPERATORS TRANSMITTER SUSPENSION. horizontal arm through its socket in the vertical parts which areclamped in position by the thumb-screw as shown. In Fig. 195 is shown an arrangement of the switch-board apparatuswhere the drops and jacks are separately mounted, this being one ofthe…
Telephone
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