Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1990-03-30
1991-05-14
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335131, H01H 6302
Patent
active
050159801
ABSTRACT:
A solenoid switch comprising an excitation coil, a stationary iron core disposed within the excitation coil, a movable iron core slidably disposed within the excitation coil in an opposing relationship with respect to the stationary iron core, and a compression spring disposed between the stationary and movable iron cores. The solenoid switch further comprises an actuator rod slidably extending through the stationary iron core, a spring for biasing the actuator rod to have one end project from the stationary iron core toward the movable iron core, a contact assembly having a movable contact mounted on the actuator rod and a stationary contact, the contact assembly operating in accordance with the movement of the actuator rod, and a magnetic reluctance element for reducing an amount of magnetic flux passing through the movable iron core and the stationary iron core through the actuating rod. The magnetic reluctance element may be a recess 21, 22 formed in either one of the actuator rod and the movable iron core for defining an air gap therebetween.
REFERENCES:
patent: 2735967 (1956-02-01), Lewus
patent: 3815060 (1974-06-01), Turnbull
patent: 4142169 (1979-02-01), Katchka et al.
patent: 4443775 (1984-04-01), Fujitani et al.
patent: 4450423 (1984-05-01), Morishita
patent: 4579010 (1986-04-01), Colvin et al.
patent: 4736178 (1988-04-01), Tanaka
Donovan Lincoln
Mitsubishi Denki & Kabushiki Kaisha
Picard Leo P.
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