Ring-shaped glass bulb and lamp assembly using the same

Details Ring-shaped glass bulb and lamp assembly using the same Ring-shaped glass bulb and lamp assembly using the same

1990-09-14

1992-04-14

DeMeo, Palmer C.

Electric lamp and discharge devices

With detachable electrical connector or support

Electrical connector

313315, 313318, 313578, 313634, 362216, 439229, H01K 124, H01K 128, H01K 146

Patent

active

051051184

ABSTRACT:
A ring-shaped glass bulb includes a ring-shaped light permeable hollow body having opposite ends each disposed at a prescribed distance from one to the other, and a filament arranged in the hollow body of the bulb. The outer-most edge portion of the outer ring edge of one of the ends of the bulb is disposed at at least the intersecting point between an outer circumferential line extending from the outer-most edge portion of the outer ring edge of the other end of the bulb and a tangent line extending from the inner-most edge portion of the inner ring edge of the other end of the bulb. A desirable prescribed distance between the opposite ends of the bulb is equal to or greater than 30 mm.

REFERENCES:
patent: 747212 (1903-12-01), O'Brien
patent: 1651287 (1927-11-01), Mayer
patent: 2366252 (1945-01-01), Geiger
patent: 2733417 (1956-01-01), Hinman et al.
patent: 3189778 (1965-06-01), Brundige
patent: 4323761 (1982-04-01), Hubner

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