Illumination – Self powered lamp – With hermetic seal
Patent
1976-03-29
1977-10-11
Moses, Richard L.
Illumination
Self powered lamp
With hermetic seal
F21V 3100
Patent
active
040537587
ABSTRACT:
An underwater swimming pool illumination system includes a lighting assembly having a lamp unit installed within its rear portion in a waterproof enclosure; and the lamp is connected to a low voltage battery. The waterproof enclosure may be at the bottom of a strut in an inverted L-shaped assembly, where the upper portion is a base which is fitted to a pad by a bayonet-type connection. The battery may be installed in the base, in which case the lighting assembly may be removed away from the pool to have the battery charged; or the battery may be remotely installed with a wire connection to the pad and lighting assembly. In either case, the installation is such that the lamp is completely electrically isolated from any alternating or ripple currents; either by physically removing the lamp from the pool for battery charging, or by a DPDT switch which either connects the battery to the lamp or to the charging circuit. This, in either case the battery is charged in a place remote from the swimming pool.
The waterproof lamp enclosure seals the rear portion of a seated beam lamp in a bowl-shaped body by an O-ring seal, when a retaining ring around the lamp is tightened against it. The retaining ring may be of a light diffracting material. The waterproof enclosure may also be attached to the wall of a swimming pool.
REFERENCES:
patent: 2906863 (1959-09-01), Ritter
patent: 3265884 (1966-08-01), Kelley
patent: 3339066 (1967-08-01), Hart
patent: 3793516 (1974-02-01), Cassey
patent: 3801022 (1974-04-01), Cassey
patent: 3852587 (1974-12-01), Koehler
patent: 3864562 (1975-02-01), Hawkins
Hewson Donald E.
Moses Richard L.
Swan Recreational Products Limited
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