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The telephone system of the British post office. A practical handbook (1901)

Herbert, Thomas Ernest · London, New York, Whittaker and Co. · leaf 68

An illustration from The telephone system of the British post office. A practical handbook, 1901, leaf 68 — very compact. The transmitter and receiver are mounted uponan ebonite handle with a press lever to complete the microphone circuit.The cradle upon which the telephone rests actuates the switch lever, andit must be admitted that the instrument presents a very pleasingappearance. The Telephone System… … Figure 42. being efficient as a telephone, it required no adjustment, and when onceSxed rejnained in working order without attention. Indeed it held its 54 Post Office Telephone. place in the Post OfiSce until very recently, when the Deckert transmitterwas introduced. Figure 42 shows the external…

Telephone · Postal service

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