Electric lamp and discharge devices – With envelope – Having base and connector
Patent
1995-12-19
1997-12-30
Patel, Ashok
Electric lamp and discharge devices
With envelope
Having base and connector
31331805, 31331809, 3133181, 439617, H01J 554, H01R 450
Patent
active
057034281
ABSTRACT:
The electric mains voltage lamp has a lamp cap with a cylindrical portion abutting a glass envelope. A resilient cover member circumferentially clamps around and covers the cylindrical portion of the lamp cap and has a circumferential, outwardly extending, flexible collar. The cover member may also cover a cylindrical portion of the envelope which is adjacent the lamp cap. If the envelope is tubular in shape, the cover member may be a sleeve closed at an end thereof which is remote from the lamp cap, so as to cover the whole of the envelope. If the lamp has a bulbous envelope, the lamp may have a resilient domeshaped member covering a portion of the envelope opposite the lamp cap and having an overlap with the cover member. The lamp is able to provide a gastight connection to a lampholder.
REFERENCES:
patent: 2464990 (1949-03-01), Plagge
patent: 2965875 (1960-12-01), Danesi
patent: 3116885 (1964-01-01), Morse
patent: 3312814 (1967-04-01), Reading
patent: 3435203 (1969-03-01), Reading
patent: 3946263 (1976-03-01), Protzeller
patent: 4201438 (1980-05-01), Shea
patent: 5143443 (1992-09-01), Madsen
patent: 5278741 (1994-01-01), Ehrman
patent: 5411410 (1995-05-01), Ogawa et al.
patent: 5439389 (1995-08-01), Cheng et al.
Egbert Walter M.
Patel Ashok
U.S. Philips Corporation
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