US PATENT SUBCLASS 362 / 164
.~.~ Miner's safety type

Current as of: June, 1999
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362 /   HD   ILLUMINATION

157  DF  SELF POWERED LAMP {16}
159  DF  .~ Nonelectric {9}
164.~.~ Miner's safety type {1}
165  DF  .~.~.~> With lock

DEFINITION

Classification: 362/164

(under subclass 159) Subject matter having means to prevent a flame from igniting combustible gases which may surround the light unit.

(1) Note. The means for preventing ignition is usually a fine screen. These devices are not sealed type units.

SEE OR SEARCH THIS CLASS, SUBCLASS:

158, for sealed units, e.g., dust proof, water tight, etc.