Lamp wattage limiting device

Details Lamp wattage limiting device Lamp wattage limiting device

1981-04-28

1984-06-26

Abrams, Neil

Geometrical instruments

200 5109, 339180, 339184L, H01R 1364, H01R 1720, H01R 2700

Patent

active

044563221

ABSTRACT:
A lamp holder and lamp arrangement is provided to inhibit insertion of lamps having wattages greater than that for which the lamp holder is designed. A ring assembly having springs with upper and lower arms is mounted at the bottom of the lamp socket. A contact member having a predetermined geometric configuration of contact button is captured between the upper and lower spring arms. A lamp of proper wattage rating has a base center contact with a corresponding geometric configuration, so that screwing in the lamp mates the geometric configurations, thereby overcoming the spring bias of the spring lower arm, and permitting electrical contact between the contact button and a contact in the bottom of the lamp socket.

REFERENCES:
patent: 438310 (1890-10-01), Edison
patent: 656284 (1900-08-01), Froschl
patent: 1910482 (1933-05-01), Stoddard
patent: 2221345 (1940-11-01), Davis
patent: 2523357 (1950-09-01), Chirelstein
patent: 2688669 (1954-09-01), Quill
patent: 2747168 (1956-05-01), Arena
patent: 3514742 (1970-05-01), Reinherz

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