Combination gas recombination/venting means for portable lightin

Details Combination gas recombination/venting means for portable lightin Combination gas recombination/venting means for portable lightin

1994-12-20

1996-07-09

Gromada, Denise L.

Illumination

Self powered lamp

With hermetic seal

362267, 362294, F21L 700

Patent

active

055351077

ABSTRACT:
An electrochemically operated device such as a portable lantern, with a waterproof housing enclosing at least one galvanic battery cell which evolves hydrogen gas, and a push button switch in the housing, a shiftable boot exposed to the housing exterior and aligned on the interior with the switch, a hydrogen recombination pellet in the housing, and a pellet retainer retaining the pellet, the housing including an elastomeric septum between its interior and exterior, having a sphincter orifice therethrough of a size to be elastomerically squeezed closed except under a predetermined pressure differential thereacross, to thereby prevent water entry to the housing, but to open to allow hydrogen gas escape from the housing at a pressure differential across the septum. The boot is resilient and the elastomeric septum preferably forms a part of the boot.

REFERENCES:
patent: 2743841 (1956-05-01), Bugel
patent: 3798440 (1974-03-01), Brindley
patent: 3939006 (1976-02-01), Kozawa
patent: 4237526 (1980-12-01), Wood
patent: 4626852 (1986-12-01), Dodge
patent: 5113326 (1992-05-01), Maglica
patent: 5207502 (1993-05-01), Maglica
patent: 5260858 (1993-11-01), Maglica
patent: 5349507 (1994-09-01), Parker
patent: 5404281 (1995-04-01), Parker

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