Pressure relief hole seal for a sealed-beam headlamp

Details Pressure relief hole seal for a sealed-beam headlamp Pressure relief hole seal for a sealed-beam headlamp

1979-11-19

1981-11-24

Demeo, Palmer C.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

29 2513, 313222, 313317, H01K 128, H01K 326

Patent

active

043026974

ABSTRACT:
The invention relates to automobile sealed-beam headlamps in which a reflector and lens assembly are hermetically sealed by an epoxy resin. A pressure relief hole in the reflector eliminates the problem of excessive expansion and contraction of the atmosphere within the lamp such as would prevent forming a hermetic seal between the reflector and lens during the epoxy resin curing cycle. A deformable metal pellet forms a hermetic seal in the pressure relief hole. An epoxy resin is applied over the deformable metal seal and cured to produce a final permanent seal.

REFERENCES:
patent: 4146812 (1979-03-01), Gagnon

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