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Expired
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Benwell Stocks
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Individual
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Individual
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Publication of GB190501638ApublicationCriticalpatent/GB190501638A/en
1638. Stocks, H. B. Jan. 27. Switches.-In a selector for a party-line telephone system, the contact-drum f, which is turned stepby-atep by the line currents and coacts with the contact-brushes, is constructed with a central metal spindle e, an insulating-brush h, a brass sleeve i, and contacts m secured to the sleeve in such positions as are required.
GB190501638D1905-01-271905-01-27Improvements in or relating to the "Party Line" System of Telephones.
ExpiredGB190501638A
(en)