Electricity: conductors and insulators – Covers or face plates – With closure for face plate opening
Patent
1994-12-05
1996-10-08
Thomas, Laura
Electricity: conductors and insulators
Covers or face plates
With closure for face plate opening
439136, H01R 13447
Patent
active
055633730
ABSTRACT:
A safety device replaces the cover plate of a wall-mounted electrical outlet box having a pair of female receptacles for receiving a male plug. The safety device has a face plate, a back plate, a pair of shutters and a biasing means. The face plate has a front face and an opposing back face. The face plate has two large apertures in it, corresponding to the two female receptacles and exposing the receptacles when the face plate is positioned atop the outlet box and secured to it. The back plate has a inner surface and an outer surface and an aperture, which is shaped and positioned to correspond to the pair of female receptacles. When the front plate and back plate are mated, the front plate and the back plate are joined with the back face of the front plate, the inner surface of the back plate and a pair of parallel flanges on the back face defining a channel. First and second shutters, corresponding to each of the large apertures on the face plate, cover the apertures. Each shutter is an imperforate shield member with an arm extending from each side and is positioned slidably within the channel so as to obstruct the corresponding large aperture completely when in a first position and to provide access to a male plug through the large aperture when in a second position. The shutters are biased into the closed first position by a biasing means, preferably a pair of rubber bands.
REFERENCES:
patent: 2820842 (1958-01-01), Meistrell
patent: 4774384 (1988-09-01), Gregory
patent: 4798916 (1989-01-01), Engel
patent: 5026299 (1991-06-01), Foulk
patent: 5240426 (1993-08-01), Barla
patent: 5449860 (1995-09-01), Buckshaw et al.
Ghosh Paramita
Thomas Laura
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