Electrical plug having locking means

Details Electrical plug having locking means Electrical plug having locking means

1992-11-02

1993-10-05

Desmond, Eugene F.

Electrical connectors

With circuit conductors and safety grounding provision

Direct grounding of coupling part member passing into aperture

439270, H01R 1320

Patent

active

052499766

ABSTRACT:
An electrical plug for 3-wire line cords includes a plug body having a U-shaped grounding pin. A rise pin is disposed between opposing walls of the U-shaped grounding pin. A locking element extending through the plug body includes a threaded proximal portion and a flat distal portion, the distal portion having a ramp disposed over the rise pin and a serrate edge opposite the ramp with the distal portion disposed within the grounding pin opposing walls. A locking knob is threaded onto the proximal portion. With the plug in an outlet, the knob is rotated clockwise to draw the flat distal portion rearward causing the ramp to ride up the rise pin and to cause the serrate edge to grip the inner surfaces of the grounding socket. Rotating the knob counterclockwise releases the serrate edge to permit withdrawal of the plug from the outlet.

REFERENCES:
patent: 2047623 (1936-07-01), Felts
patent: 4544216 (1985-10-01), Imhoff

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