H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/327
H01H 31/02 (2006.01) H01H 3/22 (2006.01)
Patent
CA 1039338
ABSTRACT: A spiral spring interconnects a pivotably mounted drive lever that nay be pivoted either by hand or by a motor, and a pivotably mounted toggle lever that is operably connected to a switch. The toggle lever is held in the switch-closed or the switch-opened positions by main latches which hold the toggle lever in position while the drive lever is pivoted to bias the spring. Once the spring is biased, stop latches engage the drive lever holding it in a spring biased position. The main latches may then be either manually operated or operated by solenoids connected to control circuitry to release the toggle lever so that the spring will react against the toggle lever to either open or close the switch depending on the position of the switch at the initiation of operation. Once the switch has either opened or closed, the spring may be either re- charged automatically by the motor, or if manual opera- tion is desired, the motor can be disabled so that the spring can be biased by manual rotation of the drive lever. A clutch mechanism is provided to disconnect the motor from the mechanism when a manual tool is inserted into the mechanism. Also provided is a shutter bolt that locks out automatic operation of the main latches when the manual tool is inserted, electrically disconnects the motor, and prevents manual operation of the main latches when the tool is inserted into the mechanism. Also, if it is desirable to test the solenoids without tripping the main latches, a mechanism is provided to manually disconnect solenoids from the main latches. In addition, in case the switch blade is welded or stuck in the closed position, an automatic pry-out mechanism is provided to assure contact separation during switch opening.
243577
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