1978-08-28
1979-11-06
Desmond, E. F.
Geometrical instruments
339 14P, 339 41, 339189R, H01R 306, H01R 1354
Patent
active
041733835
ABSTRACT:
A converter plug which has two electrodes designed to be removably received in a standard electric outlet box and which has a "ground" terminal that may be swung into an inoperative and concealed position when the outlet box is not equipped with a socket for receiving the "ground" terminal. A "ground" wire is connected to the "ground" terminal and may be connected to the outlet box when the "ground" terminal is not used. The converter plug also has an adjustable locking disc with three openings for receiving the three fixed prongs of a standard self-locking electric plug. The two electrodes and the "ground" terminal each have a hook-shaped end adapted to receive and interlock with its associated hook-shaped end of the three prongs in the standard self locking electric plug when the latter has its three prongs inserted into the disc openings and the standard plug is rotated with respect to the converter plug into locked position.
REFERENCES:
patent: 3525971 (1970-08-01), Glassman
patent: 3713074 (1973-01-01), Pasbrig
patent: 3945702 (1976-03-01), Poliak et al.
Desmond E. F.
Piper William R.
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