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Francis George Bell
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Publication of GB190628922ApublicationCriticalpatent/GB190628922A/en
28,922. Bell, F. G. Dec. 18. Telephone systems; telephones. - In an intercommunication telephone set, the line-selector A is attached to the transmitter M, which is revolubly mounted so as to be agitated by the use of the lineselector. The end of the selector is formed with a hole H which engages with the convex surface of the contact-studs c<1>, c<2>, &c. and thus keeps the selector in position. The indicating numbers may be marked on the centre of the contact-studs, so as to be visible through the hole H, thus avoiding the use of separate number plates. In a modification, the end of the line-selector is forked, as shown in Fig. 3.
GB190628922D1906-12-181906-12-18Improvements in Intercommunication Telephones and Switches therefor.
ExpiredGB190628922A
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