Sensitive latch and trip mechanism

Details Sensitive latch and trip mechanism Sensitive latch and trip mechanism

H - Electricity

01

H

306/283

H01H 9/20 (2006.01) H01H 71/50 (2006.01) H01H 3/62 (2006.01)

Patent

CA 2004528

SENSITIVE LATCH AND TRIP MECHANISM Abstract of the Disclosure A sensitive latch and trip mechanism includes a latch plate supported for pivotal move- ment under the influence of a load, and a latch lever supported for pivotal movement about a lever axis. The lever includes a latching surface dis- posed in a latching surface plane and a lever axis located a distance A from the latching surface plane in a direction perpendicular to the latching surface plane and offset from the latching surface by a distance s in a direction parallel to with both the latching surface plane and the plane in which the latch plate pivots. A coefficient of friction is defined between the latching surface and a surface of the latch plate interengaged therewith, the coefficient of friction U being correlated with the distances A and B to follow the relationship U ? B/A. In this manner, the lever may be easily pivot- ed from its latching position to unlatch the plate.

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