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Class Information
Number: 362/22
Name: Illumination > With filament control means responsive to fracture of light source envelope or enclosure > Fluid or pressure responsive
Description: Subject matter having an enclosure which is sealed and a fluid within the enclosure and wherein the means to disconnect the filament from its source of electrical energy etc. includes a switch and wherein the enclosure, the fluid and the switch are so interrelated that a break in the enclosure either (1) changes the amount of fluid in the enclosure to open the switch, or (2) changes the pressure of the fluid in the enclosure to open the switch and thus open the circuit to the filament.

Patents under this class:

Patent Number Title Of Patent Date Issued
6315424 Underwater safety lighting device for swimming pools Nov. 13, 2001
5578905 Flow-responsive air purged portable electric lamp Nov. 26, 1996
5519587 Air purged portable electric lamp May. 21, 1996
5140216 Explosion proof lamp with liquid extinguishant Aug. 18, 1992
5068720 Video inspection system for hazardous environments Nov. 26, 1991
4961111 Video inspection system for hazardous environments Oct. 2, 1990
4375315 Arc lamp illuminator Mar. 1, 1983
4276580 Pressure actuated electrical system Jun. 30, 1981
4275433 Lighting fitting Jun. 23, 1981

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