The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 124
rals to ensure good contact, f isthe lower part of the stem of the cradle on which the hand-micro-telephone rests when not in use, G being an ebonitebush which acts as guide and support, and h an insulatingbutton. The weight of the hand-micro-telephone depressesthe ends of the levers B and c… … Fig. 95.—Scale \ furnished with right and left handed screws. The full con-nections of this switch are shown in Fig. 116. Hand-Micro-Telephone.—This is a standard form of com-bined transmitter and receiver now in use in this country.Owing to its great convenience it has become very…
Telephone
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