Illumination – With filament control means responsive to fracture of light... – Fluid or pressure responsive
Patent
1979-04-09
1981-06-30
Lechert, Jr., Stephen J.
Illumination
With filament control means responsive to fracture of light...
Fluid or pressure responsive
362267, 362276, 362375, 362390, F21V 2500
Patent
active
042765803
ABSTRACT:
This invention is an improvement to safe electrical systems which have a hermetically enclosed space containing an electrical circuit member wherein means are provided for connecting and disconnecting the electrical circuit member to a power source in response to pressure changes within the hermetically enclosed space and for altering the volume within the hermetically enclosed space to effect a pressure change therein.
REFERENCES:
patent: 459872 (1891-09-01), Tommasi
C. J. Rogers Enterprises Inc.
Lechert Jr. Stephen J.
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