Cradle for contact operating means
AssigneeI-T-E Imperial Corporation
InventorTadeusz J. Rys
Life of this patent
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Abstract
A single pole molded case circuit breaker is constructed with an internal metal frame to which the contact operating mechanism is mounted. This mechanism includes a releaseable cradle which when latched permits the circuit breaker contacts to be closed. The cradle is a single element having spaced parallel walls, a latching extension on one of these walls and a kicker on the other wall. When the cradle is released or tripped the kicker is engageable with a toggle interposed between the contacts and the cradle for collapsing the toggle to assure contact opening. Integral formation on the walls provide a pivotal mounting for the toggle. A reset pin is loosely mounted between the parallel walls for low friction resetting of cradle.
Claims10
A circuit breaker pole unit including a narrow insulating housing, cooperating movable and stationary contact means disposed within said housing, a manually operable spring powered operating mechanism for opening and closing said contact means;
- said mechanism including a releaseable cradle, a collapsible toggle interposed between said cradle and said movable contact means, and latch means for maintaining said cradle latched in an operating position wherein said operating mechanism is operable to close said contact means;
- automatic means for tripping said latch means responsive to predetermined abnormal current conditions thereby releasing said cradle whereby said contact means are opened by said mechanism;
- a metal frame within said housing;
- pin means pivotally mounting said cradle on said frame;
- said cradle including first and second spaced parallel walls, one of which has an extension engageable by said latch means;
- said walls on their confronting surfaces having integral bearing formations which pivotally support said toggle.
Dependencies are inferred from the claim text.