Illumination – Self powered lamp – With hermetic seal
Patent
1993-04-20
1994-09-20
Husar, Stephen F.
Illumination
Self powered lamp
With hermetic seal
362207, F21L 700
Patent
active
053495063
ABSTRACT:
A miniature flashlight as disclosed to comprise a barrel, a tail cap, a head assembly, and means for holding a miniature lamp bulb and for providing interruptible electrical coupling to dry cell batteries retained within the barrel. A spring is disposed between the tail cap and the batteries within the barrel to urge the batteries into contact with the center conductor on the second insulated receptacle, thereby urging the second and the first insulated receptacles in the same direction until the second insulated receptacle contacts the lip on the end of the barrel whereat the second conductor member is in contact with the lip. One-way valves may be positioned at seal locations in association with passageways to allow venting of overpressure within the interior volume of the flashlight.
REFERENCES:
patent: 4237526 (1980-12-01), Wood
patent: 4327401 (1982-04-01), Siiberg
patent: 4348715 (1982-09-01), Christensen et al.
patent: 4433366 (1984-02-01), Wade
patent: 4530039 (1985-07-01), Shin-Shi
patent: 4819141 (1989-04-01), Maglica et al.
patent: 4823242 (1989-04-01), Maglica et al.
patent: 5003440 (1991-03-01), Maglica
patent: 5113326 (1992-05-01), Maglica
patent: 5207502 (1993-05-01), Maglica
Husar Stephen F.
Mag Instrument Inc.
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