Electrical switching apparatus and control system for use therew

Electricity: magnetically operated switches – magnets – and electr – Permanent magnet-actuated switches – Plural switches

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H01H 3600

Patent

active

041124014

ABSTRACT:
An array of magnetically-actuatable electrical switches is controlledly operated in response to changes in position of a movable member controlling the magnetic field reaching the switching elements. The movable member may for example comprise a panel, supporting permanent magnets which are moved into switch-closing or switch-opening positions by motion of the panel, or a movable magnetic shielding arrangement used in conjunction with fixed permanent magnets so that the position of the magnetic shield determines whether the switches are open or closed. The preferred arrangement is such that the motion of the movable switch-controlling member can be accomplished mechanically by a manually-operable actuator or electrically by an electrically-controlled solenoid arrangement, at the option of the operator. In one preferred embodiment a latching arrangement is provided which holds the movable switch-controlling member in one of two stable positions until either the manually-operable mechanical actuator or the electrically-controlled solenoid is momentarily operated to move the movable member to its opposite stable position. In other cases, the switch-controlling movable member may, in effect, latch itself in that it maintains whatever position it is placed in, due to its own inertia and associated friction, until it is forced into an alternate position. In still other embodiments the movable switch-controlling member may be spring-biased to one of its two operative positions, so that it is held in its alternate operative position only while displacing force due to the mechanical actuator or the solenoid device continues to be applied thereto. The apparatus not only makes possible the desired electrical control of switching, either from a local position or from a more remote position such as a central control site, but also enables local mechanical control of switching in the event that power outage or other malfunction prevents the electrical control from functioning properly, or for other reasons.

REFERENCES:
patent: 3210498 (1965-10-01), Jackson et al.
patent: 3249715 (1966-05-01), Warman
patent: 3337825 (1967-08-01), Brooks
patent: 3419710 (1968-12-01), Mathews, Jr. et al.
patent: 3506939 (1970-04-01), Hesser
patent: 3514729 (1970-05-01), Webb
patent: 3581030 (1971-05-01), Sedley

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