Handle block for electrical switching device

Details Handle block for electrical switching device Handle block for electrical switching device

1993-04-19

1994-03-01

Luebke, Renee S.

Electricity: circuit makers and breakers

Switch activation inhibitor

Actuator blocking device

H01H 920

Patent

active

052909794

ABSTRACT:
A molded generally planar U-shaped plastic member has a pair of lateral projections on one leg and a single lateral projection at a distal end of the other leg, which projections are received in recesses in mutually facing surfaces of a raised escutcheon rib surrounding a handle opening to locate the base of the U-shaped member in the path of the handle, blocking movement of the handle. A notch in the distal end of the leg having the single lateral projection receives a flat-bladed tool which is twistable against the escutcheon rib surface to deflect the leg inward and projection free of the respective recess to release the handle block. The recesses are symmetrically arranged to permit the handle block to be installed to block the handle ON or OFF as desired.

REFERENCES:
patent: 2832857 (1958-04-01), Landmeier
patent: 3109899 (1963-11-01), Pastene
patent: 3629529 (1971-12-01), Dietz
patent: 3678236 (1972-07-01), Hughes
patent: 4158116 (1979-06-01), Krueger
patent: 4300030 (1981-11-01), Dimarco et al.
patent: 4791525 (1988-12-01), Grass et al.
patent: 4820887 (1989-04-01), Schmitz
patent: 4882456 (1989-11-01), Hovanic et al.

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