Electricity: circuit makers and breakers – Interlocking
Patent
1997-04-18
1999-07-13
Friedhofer, Michael A.
Electricity: circuit makers and breakers
Interlocking
2003182, H01H 920
Patent
active
059230096
ABSTRACT:
A latchable interlock switch that can be installed under a cover of a process machine for shutting off a power supply to the machine when the cover is removed is disclosed. The switch can also be latched into a permanently engaged position so that the power supply to the machine remains on even when the cover has been removed to perform a repair or maintenance procedure. The interlock switch may optionally be provided with an indicator lamp to indicate the on/off state of the switch.
REFERENCES:
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patent: 2592660 (1952-04-01), Crumley
patent: 4182943 (1980-01-01), Butterworth
patent: 4206328 (1980-06-01), Coyle et al.
patent: 4636602 (1987-01-01), Hall et al.
patent: 4956983 (1990-09-01), Okamura et al.
patent: 5055643 (1991-10-01), Pardini et al.
patent: 5593022 (1997-01-01), Schaeffer et al.
Friedhofer Michael A.
Taiwan Semiconductor Manufacturing Co. Ltd.
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