Prefocused lamp base and fixture

Details Prefocused lamp base and fixture Prefocused lamp base and fixture

1975-04-10

1976-08-10

Miller, Jr., George H.

Buckles, buttons, clasps, etc.

240 52R, 339144R, 29 2513, F21M 700, F21V 2100, H01R 3374, H01J 918

Patent

active

039743705

ABSTRACT:
A prefocused single-ended lamp comprises a hollow ceramic base having an open side in which the lamp end is cemented and having three protrusions or bosses in the opposite side which is clamped to a fixture plate. The fixture plate provides six constraints to the bosses in order to fix the lamp in a stable kinematic mounting. The envelope is adjusted in the basing cement to place the lamp filament in a predetermined location and attitude relative to the fixture plate-engaging surfaces of the bosses. Such location and attitude are then reproducible with respect to similar fixture plates to an accuracy determined by the tolerance limits to which the fixture plates are machined.

REFERENCES:
patent: 2082954 (1937-06-01), Gustin
patent: 3516042 (1970-06-01), Wagner
patent: 3868531 (1975-02-01), De Fraeye et al.
E. Bright Wilson Jr., An Introduction to Scientific Research, 1952, McGraw-Hill Book Co., Inc., pp. 104-108.

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