Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1992-10-22
1995-04-18
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
200400, H01H 7500
Patent
active
054082080
ABSTRACT:
A remote tripping mechanism for use with a spring loaded safety switch. In a preferred embodiment, the mechanism is made up of two cams with a compression type trip spring anchored between them. The two cams are held in the "normal position" (the spring compressed) by a latch. In this position, the switch operates in the same manner as a conventional safety switch. A trip lever connected to a solenoid is positioned such that it is unobtrusive when the switch is turned ON and OFF. When the switch is in the ON position and power is applied to the solenoid, the trip lever unlatches the latch and the two cams separate. The first cam engages and lifts the bail, turning the switch OFF. The cams are reset by turning the handle to the OFF position. This compresses the trip spring and resets the latch.
REFERENCES:
patent: 3602676 (1979-08-01), Mrenna
patent: 3684850 (1972-08-01), Kaderbeck et al.
patent: 3860910 (1975-01-01), Hudson
patent: 3872273 (1975-03-01), Netzel
patent: 4639612 (1987-01-01), Bowman-Jones
patent: 4804862 (1989-02-01), Bowman-Jones et al.
patent: 5301083 (1994-04-01), Grass et al.
DiMarco Bernard
Guiney Bruce D.
Lewis Bradley J.
Donovan Lincoln
Luccarelli, Jr. Peter A.
Ludwin Richard M.
Siemens Energy & Automation Inc.
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