Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1985-12-19
1987-07-28
Marcus, Stephen
Electricity: circuit makers and breakers
Liquid contact
Time delay
200325, 335 76, 185 10, 74 2, 74 42, H01H 330
Patent
active
046833579
ABSTRACT:
A stored-energy switch operating mechanism is provided that includes a charging arrangement that reduces the peak forces required during the charging of the operating mechanism to store operating energy. The charging arrangement is responsive to a unidirectional input to accomplish the charging of the operating mechanism. In an illustrative arrangement, the operating mechanism includes a closing spring and an opening spring. During charging, the springs are sequentially charged prior to any switch-closing or switch-opening operation. The operating mechanism does not require the detachment of any components during either charging or switch operation. The charging arrangement, in an illustrative embodiment, is responsive to a unidirectional rotary input to a charging crank to sequentially drive a charging element in a first direction and then in a second, opposite direction. In the first direction, a first of the springs is charged and latched. In the second direction, the second spring is charged and latched. The operating mechansim is then ready for switch operation when required. For example, in a specific arrangement, the switch is open during charging. After charging and when it is desired to close the switch, the closing spring is released which causes the operating mechanism to close the switch. Thereafter, when it is desired to open the switch, the opening spring is released.
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patent: 3956942 (1976-05-01), Seki et al.
patent: 4246628 (1981-01-01), Ikemizu et al.
patent: 4578551 (1986-03-01), Lin
Cusick Ernest G.
Lapacek James V.
Marcus Stephen
S&C Electric Company
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