US PATENT SUBCLASS 362 / 158
.~ With hermetic seal


Current as of: June, 1999
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362 /   HD   ILLUMINATION

157  DF  SELF POWERED LAMP {16}
158.~ With hermetic seal


DEFINITION

Classification: 362/158

(under subclass 157) Subject matter wherein the casing encloses the energy source and the light source powered by the energy source and wherein the casing permits light emitted by the light source to exit through a portion of the casing which is light transmissive and wherein (1) the casing is sealed against liquid, gas or dust, or (2) an element or elements of the lamp are sealed against liquid, gas or dust, or (3) the lamp is encased in a covering which is transparent to the light emitted by the lamp, and which is sealed against liquid, gas or dust.

(1) Note. The lamp may be enclosed in a container which may be partially or totally transparent to the light emitted by the light source, or the lamp casing may be sealed by structure such as a covering, a coating of material or joints or the casing may be sealed as by a gasket. Further, a light element may be coated or potted to make the element fluid proof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

21+, for lamps which open the electrical circuit to the light bulb in case of fracture of the light source envelope or enclosure.

164, for nonelectric miners safety lamps (Davey Lamp).