Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1985-04-10
1986-03-25
Marcus, Stephen
Electricity: circuit makers and breakers
Liquid contact
Time delay
200320, 200153LB, 74 2, 185 37, 251 74, 251 89, H01H 300
Patent
active
045785511
ABSTRACT:
An improved operating mechanism is provided for controlling the operational state of an electrical switch or interrupter between open and closed positions. The operating mechanism includes a switch operating member that is selectively movable in switch-opening and switch-closing directions to effect opening and closing of the switch. The operating mechanism stores energy to selectively close the switch and to immediately thereafter be capable of opening the switch as required. A carriage is driven to charge an opening spring and a closing spring while the switch operating member remains latched in a stationary position. The closing spring acts between the carriage and the switch operating member. The opening spring acts between the carriage and the frame or housing of the operating mechanism. An independent latch is provided for each of the switch operating member and the carriage; each of the latches directly operating on a respective one of the switch operating member or the carriage. To close the switch, the latch for the switch operating member is tripped to release the stored energy in the closing spring which acts to move the switch operating member to the switch-closed position. An arrangement is provided for moving the switch operating member in the switch-opening direction in response to movement of the carriage in a direction opposite to that of charging. In a specific embodiment, the arrangement includes the carriage directly acting against the switch operating member. When it is desired to open the switch, the latch for the carriage is tripped to release the stored energy in the opening spring which acts through the carriage to move the switch operating member to the switch-open position. The carriage and the switch operating member each move with respect to an axis, the axes being coincident.
REFERENCES:
patent: 2023235 (1935-12-01), LeCount
patent: 2846621 (1958-08-01), Coggeshall et al.
patent: 3875360 (1975-04-01), Rys
Lapacek James V.
Marcus Stephen
S&C Electric Company
Sholl Linda J.
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