# US 4,393,360 A · Electrical switch structure

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- Number: US 4,393,360 A
- Document ID: US4393360A
- Status: Granted
- Kind: A
- Application number: 06/268,092
- Filed: 1981-05-27
- Granted: 1983-07-12
- Earliest claimed: 1980-05-27
- Assignees: Kabushiki Kaisha Tokai Rika Denki Seisakusho
- Inventors: Kaneyasu Arakawa; Shigeo Mizuno
- Web page: https://patentgrep.com/patent/US4393360A

## CPC

- H01H 3/503: {making use of electromagnets}
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

An electrical switch structure comprising a lever rotatably mounted between neutral position and actuated position, a switching element ON-OFF operated by said lever, a latching means to latch said lever in the actuated position and an unlatching means to rotate back said lever to the neutral position. In one type of the switch said latching means is accomplished by the energization of a solenoid, in other type of the switch said unlatch means being accomplished by said energization of the solenoid.

## Claims

### Claim 1

An electrical switch comprising:
a lever rotatably mounted in a case for movement between a neutral position and an actuated position,
a switch member positioned in said case comprising a pair of normally open contacts,
means on said lever to close said contacts when said lever moves to said actuated position,
latch means to hold said lever in said actuated position comprising a first, central detent portion and at least one other detent portion juxtaposed to said first portion,
spring biased roller means carried by said lever to engage said first detent portion when the lever is in said neutral position and to engage said other detent portion when in said actuated position, and
solenoid means to move said latch means to return said lever from said actuated position to said neutral position when required to return said contacts to said normally open condition.

### Claim 2 (depends on 1)

The switch of claim 1 wherein said first detent portion is positioned between second and third detent portions.

### Claim 3 (depends on 2)

The switch of claim 2 wherein said first, second and third detent portions are similarly contoured valley portions.

### Claim 4 (depends on 2)

The switch of claim 2 wherein said first detent portion is a valley portion and said second and third detent portions are similar ramp portions.

### Claim 5 (depends on 1)

The switch of claim 1 wherein:
said latch means comprises a pair of said other detent portions in the form of ramps juxtaposed to said first detent portion which is of valley form,
said lever includes a pair of grooves on a surface thereof within said case below said mounting of the lever in said case, and
said solenoid means includes a spring biased moveable core element that reciprocates therein to engage with one of said grooves in compliance with the pivotal movement of said lever from said neutral position to one of said said actuated positions and to disengage from said grooves upon energization of said solenoid means,
the action of said roller means on said ramps of said latch means serving to return said lever to said neutral position from an actuated position upon the disengagement of said core element from said grooves.