PHONE 6000 CAN HEAR.
A telephone instrument which may have wide applications to both wireless and ordinary telephony has been invented by M. L. Gaumont, who has demonstrated it at the Academy of Sciences, Paris. The vibrating part of the instrument weighs only 15 grains, and consists of a little cone made of silk wound with a spiral coil of aluminium wire, through which the telephone current passes. This vibrates betwee*. cone-shaped poles of an electro-mag-net, which are bored with holes in order to let the movements of air caused by the silk cone be transmitted to a horn.
The telephone, which is quite small, is stated to be sufficiently loud for 6000 people to be able to hear. A modified form of the telephone can be heard 300 yards away.
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https://paperspast.natlib.govt.nz/newspapers/SNEWS19230615.2.3
Bibliographic details
Shannon News, 15 June 1923, Page 1
Word Count
131PHONE 6000 CAN HEAR. Shannon News, 15 June 1923, Page 1
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