Welding Technology Corporation

Jeffrey J Mason

John Foster Farrow

A rotary circuit breaker door safety interlock for use with a power switch actuated by a rotating shaft installed in a enclosure with a hinged door is disclosed. The door safety rotary circuit breaker interlock functions both to prevent the enclosure door from being opened unless the power switch has first been turned OFF, and to prevent the power switch from being turned ON while the enclosure door is open. The door safety rotary circuit breaker interlock can be intentionally overridden to allow the enclosure door to be opened without turning the power switch OFF, and to allow the power switch to be turned ON while the enclosure door is open. The door safety rotary circuit breaker interlock is simple mechanically, requires no springs or deformable members for its operation, and can be adapted to many mounting variations in enclosures having doors that hinge at the left, right, top, or bottom.

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Elgin, IL, United States of America

Jeffrey J Mason