Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Latching means
Patent
1993-01-29
1994-08-30
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Latching means
335172, 335 21, H01H 920
Patent
active
053431790
ABSTRACT:
A solenoid operated circuit breaker trip device has a base defining a guide channel and an actuator that slides in the guide channel and interacts with a contact breaking mechanism having a trip bar operable to make or break electrical contacts. A spring biases the actuator toward the trip bar. A solenoid on the base electromagnetically displaces a plunger along a linear path and is coupled to a trigger having a latching surface that holds or releases the actuator. The guide channel runs parallel to the path of the plunger, adjacent the solenoid. The trigger is L-shaped and pivoted on a pivot pin between two legs of its L-shape, on an axis transverse to the path of the plunger. One of the two trigger legs is coupled to the plunger, and the other has an engagement surface that is moved behind a complementary surface of the actuator to selectively block its displacement. The base can be a slotted frame attached to the solenoid or a molded housing having an interior cavity for receiving the solenoid. A return spring urges the trigger toward the latching position.
REFERENCES:
patent: 4301433 (1981-11-01), Castonguay et al.
patent: 4408174 (1983-10-01), Seymour et al.
patent: 5105326 (1992-04-01), Shimp et al.
Fugate David W.
Marks James M.
Pipich Charles W.
Donovan Lincoln
Eaton Corporation
Moran Martin J.
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