Interlock device

Details Interlock device Interlock device

1995-11-13

1997-03-11

Walczak, David J.

Electricity: circuit makers and breakers

Switch activation inhibitor

Actuator locking device

200 4316, H01H 928

Patent

active

056092440

ABSTRACT:
An interlock device (76) is disclosed in connection with an electric circuit actuating mechanism (10). A latch (88) is rotatably fixed to the shaft (86) extending between a knob (80) and a master switch (78). The latch (88) includes an arcuate arm (94) which slides through an aperture (126) of a catch (120) when the closure (26) is in a closed position relative to a switch box (11). The catch (120) includes a cam (128) which holds a latch plate (104) in an unlatched position when the closure (26) is in its closed position, with the latch plate (104) in the unlatched position being in a non-interfering relation with the rotation of the latch (88), switch (78), and knob (80). When the closure (26) is in an open position, the cam (128) does not engage the latch plate (104) which moves under bias to a latch position. In its latch position, a notch (110) in the latch plate (104) receives an extension (96) formed on the latch (88) to prevent rotation of the latch (88), switch (78), and knob (80) from their off position.

REFERENCES:
patent: 1376813 (1921-05-01), Horton
patent: 1443867 (1923-01-01), Burns
patent: 1981353 (1934-11-01), Getchell
patent: 1986221 (1935-01-01), Sachs
patent: 5288958 (1994-02-01), Grunert
patent: 5463196 (1995-10-01), Darimont

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