Siemens Energy & Automation, Inc.

Andrew Hall

Robert P Lawson

Stephen Scott Thomas

William McCoy

Ralph Leon Newton

An apparatus for operating a circuit breaker. The circuit breaker includes a housing, a cradle mounted in the housing and coupled to a handle and to a movable contact. The apparatus comprises a latch frame mounted in the circuit breaker housing. A latch roller is mounted on the cradle. A latch member is configured to selectively engage the latch roller and the latch member is rotatably coupled to the latch frame. A latch shaft assembly is rotatably mounted in the latch frame and selectively engaged by the latch member. Upon rotation of the latch shaft assembly, the latch shaft assembly will disengage from the latch member and cause the movable contact to move.

Latch mechanism for a circuit breaker

An interlock for two circuit breakers, with the circuit breakers configured in the same electrical circuit and with each circuit breaker having a cross bar and contact assembly. The interlock comprises a pivot pin mounted a spaced distance from the two circuit breakers. An interlock yoke having two ends, with a notch proximate each end of the yoke and the yoke is coupled to the pivot pin. A first operator rod having a first end is configured to engage the cross bar and contact assembly of one circuit breaker and has a second end configured to engage the notch of the yoke. A second operator rod having a first end is configured to engage the cross bar and contact assembly of the other circuit breaker and has a second end configured to engage the notch of the yoke. When one operator rod is moved by the cross bar and contact assembly of one circuit breaker, that operator rod pivots the yoke, causing the other operator rod to block the operation of the other circuit breaker.

Interlock for a circuit breaker

a A positive OFF toggle mechanism,is disclosed for a circuit breaker having &ldquo;ON&rdquo;, &ldquo;OFF,&rdquo; and &ldquo;TRIPPED&rdquo; conditions and corresponding handle positions. The circuit breaker,includes a pair of contacts,, one of which is coupled to an operating mechanism,having a pivoting member,. The positive OFF toggle mechanism,includes a lower toggle member,having a first end,operatively coupled to the contact,coupled to the operating mechanism,and a second end,coupled to a toggle pivot pin,; an upper toggle member,having a first end,coupled to the toggle pivot pin,and a second end,in operative contact with a toggle pin mounted on the operating mechanism,. The positive OFF circuit breaker further includes a catch member mounted on the pivoting member of the operating mechanism,, with the catch member arranged to engage the second end,of the upper toggle,when the circuit breaker,is in the TRIPPED condition and the pair of contacts remain together.

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Lilburn, GA, United States of America

Andrew Hall