Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Multiple filament load devices
Patent
1977-10-27
1978-10-17
Smith, Alfred E.
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Multiple filament load devices
313 51, 313316, H01K 162
Patent
active
041211340
ABSTRACT:
A multiple filament lamp has one set of ends of all filaments connected to a common conductor and the end of another set individually connected to separate conductors. The conductors are mounted in a non-conducting lamp base with the common conductor projecting centrally beyond the bottom of the base, and the separate conductors recessed into the side of the base and equally spaced around its circumference. The base is slidable into a socket-adapter having an outer conducting shell defining standard electric socket screw threads fixed to an inner non-conducting cylinder that is recessed interiorly at the top to receive a retainer ring for engaging a similar recess around the top of the lamp base, and recessed exteriorly to receive a conductor contact spring for biasing a spring end extending through the non-conducting cylinder inwardly into separate engagement with the respective conductors recessed in the lamp base as the lamp and its base are turned in the socket-adapter. The socket-adapter is screwable into a live electric socket by its conducting shell which is in contact with the contact spring and spring end. The lamp and base are rotatable in the socket-adapter to sequentially bring the separate recessed conductors into contact with the spring end to complete an electrical circuit with the live electric socket for each filament in turn through the common bottom conductor and respective separate side conductors.
REFERENCES:
patent: 476183 (1892-05-01), Ball
patent: 599910 (1898-03-01), Lister
patent: 1445120 (1923-02-01), Wise
patent: 1449627 (1923-03-01), Rohner et al.
patent: 1863500 (1932-06-01), Piersimoni
patent: 3673534 (1972-06-01), Marinace
patent: 3886400 (1975-05-01), Dill
Lake, Jr. James B.
Roberts Charles F.
Smith Alfred E.
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