Illumination – Automatic substitution of power supply or light source
Patent
1976-09-27
1979-05-29
Shoop, William M.
Illumination
Automatic substitution of power supply or light source
362254, 362276, 362267, 307 66, F21V 1904, F21L 700, H02J 700
Patent
active
041568915
ABSTRACT:
An explosion-proof emergency light. The emergency light includes an explosion-proof housing containing a rechargeable battery, a sealed-beam light and emergency electronics for providing a charging current for the battery and for connecting the sealed-beam light to the battery upon loss of AC line voltage. Access is provided to the interior of the explosion-proof emergency light through a circular cover containing an explosion-proof glass window through which emergency illumination is provided. The sealed-beam light is located eccentrically with respect to the glass window; and indicator lights for denoting the charge state of the rechargeable battery and the presence of AC current are mounted above the sealed-beam light, both being disposed in the cresent-shaped area formed by the aforesaid eccentric mounting, so as to be visible from the exterior of the explosion-proof emergency lamp.
REFERENCES:
patent: 2702849 (1955-02-01), Bissell
patent: 3114095 (1963-12-01), Palmer
patent: 3125300 (1964-03-01), Roche
patent: 3180980 (1965-04-01), Morrison
patent: 3641336 (1972-02-01), Boin
patent: 3890555 (1975-06-01), Nelson et al.
patent: 3976986 (1976-08-01), Zabroski
Shoop William M.
Wong Peter S.
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