Geometrical instruments
Patent
1977-12-12
1979-02-13
Lake, Roy
Geometrical instruments
339101, H01R 1356
Patent
active
041392531
ABSTRACT:
A retaining device for preventing withdrawal of an electric plug from a wall or extension cord socket responsive to forces exerted on a cord connected to the plug. The devices of the first and second embodiments are fastened to a wall adjacent a conventional wall outlet. The devices frictionally engage the cord so that forces exerted on the cord are not transmitted to the plug.
REFERENCES:
patent: 3029408 (1962-04-01), Anderson
patent: 3383639 (1968-05-01), Anderson et al.
patent: 3930116 (1975-12-01), Richards
Desmond E. F.
Lake Roy
Urban Arthur L.
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