Lamp socket for use with multi-level bulb and nightlight

Details Lamp socket for use with multi-level bulb and nightlight Lamp socket for use with multi-level bulb and nightlight

1977-05-20

1978-08-01

Smith, Alfred E.

Electric lamp and discharge devices: systems

Plural diverse-type load devices

200 5106, 200 5117, 315317, H05B 3500, H01R 1954

Patent

active

041045653

ABSTRACT:
A lamp socket for use with a three-way bulb and a nightlight has five positions including off, nightlight, nightlight and low, nightlight and medium, and high. The socket includes a screw base for receiving the three-way bulb, a nightlight terminal coupled to the nightlight located outside of and remote from the socket, and a pair of power terminals coupled via wires and a plug to a wall outlet or other source of power. The different combinations and levels of illumination are provided by a rotatable element within the socket coupled to be rotated by a turnkey and having opposite conductive shells forming a predetermined array of conductive and non-conductive segments at pairs of inclined teeth at the outer edge of the element. One of the power terminals is electrically coupled to one of the conductive shells by a flexible contact. The nightlight terminal and a pair of contacts at the base of the three-way bulb are coupled to resilient contacts disposed in fixed locations so as to contact the various conductive and non-conductive segments on the pairs of inclined teeth as the element is rotated. The conductive shells are selectively coupled to and uncoupled from one another when the element is in the different positions by a further pair of resilient contacts disposed to contact different pairs of the inclined teeth as the element is rotated.

REFERENCES:
patent: 486334 (1892-11-01), Hall et al.
patent: 1022058 (1912-04-01), Bliss
patent: 1147949 (1915-07-01), Keen
patent: 1188220 (1916-06-01), Tamura

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