Ring-shaped lamp device having bulb tiltable relative to base st

Details Ring-shaped lamp device having bulb tiltable relative to base st Ring-shaped lamp device having bulb tiltable relative to base st

1991-07-12

1993-04-20

Yusko, Donald J.

Electric lamp and discharge devices

With envelope

Having base and connector

313 15, 313489, 439229, 439234, 439238, H01J 554, H01J 6152

Patent

active

052045803

ABSTRACT:
A lamp device includes a ring-shaped bulb, terminated at a prescribed annular length, each terminated portion of which is formed in a linear shape so as to make the bulb axis of one of the terminated portions coincide with that of the other terminated portion, and a base structure rotatably mounted around the opposite terminated portions of the bulb. Thus, the location of the bulb can be adjusted to a desirable position by the rotation of the bulb when the lamp device is attached to an external supporting device.

REFERENCES:
patent: 2392785 (1946-01-01), Thomas
patent: 2400381 (1946-05-01), Young
patent: 2597666 (1952-05-01), Oday et al.
patent: 3858162 (1974-12-01), Mai et al.
patent: 4656561 (1987-04-01), Shinbo et al.
patent: 4931685 (1990-06-01), Dobashi et al.

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