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Expired
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Robert Frederick Hall
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Individual
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Individual
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Publication of GB189906269ApublicationCriticalpatent/GB189906269A/en
6269. Hall, R. F. March 23. Incandescent lamps, holders for. A cylindrical insulator b, shown in section, has a raised central part f, two cylindrical recesses to receive plunger carriers c, and two side grooves to receive projections in the metal socket a for preventing rotation. An insulating-cap g is held upon the top of the insulator b by the upper part a<3> of the case, which screws on the socket a. The raised part f and the cap g are grooved to receive the flexible conductors d. The plunger carriers c have halfcylindrical upper portions, with circular recesses and screws c<4> to hold the conductors ; their lower portions are screw-threaded to carry caps e<2> by which flanged hollow plungers e and springs are retained. The plungers only project through holes in the insulator b. A shade-carrying ring h is screwed on the socket a.
GB189906269D1899-03-231899-03-23Improvements in Electric Lamp Holders.
ExpiredGB189906269A
(en)