Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Electric switch inside evacuated or gas filled envelope
Patent
1976-01-22
1977-03-22
Chatmon, Jr., Saxfield
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Electric switch inside evacuated or gas filled envelope
315 74, 315119, 315106, 315107, 313 17, 313227, H01J 744, H01J 1346, H01J 1734, H01K 162
Patent
active
040139204
ABSTRACT:
HID lamp has resilient safety switch positioned proximate the inner surface of the dome portion of the protective outer envelope in contact with an extremity of a resilient leaf-spring support portion of the arc tube frame, to maintain the switch in a closed position. When the envelope is shattered, the normally closed switch will open to break the electrical path to the arc tube, thereby rendering the lamp inoperative.
REFERENCES:
patent: 2113314 (1938-04-01), Brueckmann
patent: 2286789 (1942-06-01), Dench
patent: 2950417 (1960-08-01), Breeding et al.
patent: 3767965 (1973-10-01), Collins et al.
patent: 3872340 (1975-03-01), Collins
patent: 3965387 (1976-06-01), Stuart et al.
Chatmon, Jr. Saxfield
Palmer W. D.
Westinghouse Electric Corporation
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