US3769481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined electrical control and safety switch for vehicles
Assignee: Indak Manufacturing Corp
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Filing: 1972-05-10
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Granted: 1973-10-30
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Expires: 1992-05-10
Abstract
Abstract The illustrated push-button switch comprises fixed contacts which are adapted to be connected together by a contactor operated by the push button. The switch may be employed to short circuit the ignition of a vehicle engine so as to stop the engine. The switch has the additional function of automatically stopping the engine if the operator falls off the vehicle. To accomplish this additional function, a cord or the like is provided between the operator''s body and a safety member removably mounted on the switch. Normally, the safety member prevents a spring contactor from forming a bridge between the contacts. When the safety member is withdrawn, the spring contactor engages one or more of the contacts and closes the circuit therebetween so as to stop the engine.
Inventors
- 👤 A Raab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:49
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/022; H01H3/0226; H01H27/00; H01H27/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
188 words
A combined electrical control and safety switch, comprising a casing, first and second electrically conductive contacts mounted in said casing, each of said contacts having an enlarged head with a contact point at one end thereof, a main conductive contactor movable in said casing into engagement with both of said contact points to form a closed circuit therebetween, movable control means on said casing for operating said main contactor, a conductive spring contactor mounted on said first contact between said head thereof and said casing, said head of said second contact having a flange surface on the opposite side of said head from said contact point thereon, said spring contactor being movable into and out of engagement with said flange surface to form a selectively operable electrical connection therebetween, said spring contactor being spring biased toward engagement with said flange surface, said casing having an opening therein, and a safety member removably mounted in said opening, said safety member being movable against said spring contactor to shift said spring contactor away from said flange surface on said second contact when said safety member is mounted in said opening.
Claim 2
Dependent Claim
188 words
A combined electrical control and safety switch, comprising a casing, first and second electrically conductive contacts mounted in said casing, each of said contacts having an enlarged head with a contact point at one end thereof, a main conductive contactor movable in said casing into engagement with both of said contact points to form a closed circuit therebetween, movable control means on said casing for operating said main contactor, a conductive spring contactor mounted on said first contact between said head thereof and said casing, said head of said second contact having a flange surface on the opposite side of said head from said contact point thereon, said spring contactor being movable into and out of engagement with said flange surface to form a selectively operable electrical connection therebetween, said spring contactor being spring biased toward engagement with said flange surface, said casing having an opening therein, and a safety member removably mounted in said opening, said safety member being movable against said spring contactor to shift said spring contactor away from said flange surface on said second contact when said safety member is mounted in said opening.
Claim 3
Dependent Claim
121 words
A switch according to claim 1, including a third contact mounted in said casing and having an enlarged head with a contact point at one end thereof and a flange surface on the opposite side thereof, said main contactor being engageable with said contact point of said third contact, and an additional spring contactor element mounted on said first contact and biased toward engagement with said flange surface of said third contact to form a selectively operable electrical connection between said first and third contacts, said safety member being movable against said additional spring contactor element to shift said additional spring contactor element away from said flange surface on said third contact when said safety member is mounted in said opening.
Claim 4
Dependent Claim
33 words
A switch according to claim 2, including a spring sheet metal member, said spring contactor and said additional spring contactor element being in the form of leaf spring arms on said metal member.
References Cited (Backward Citations)
US1991939A
Cited
FR817542A
Cited
US2331826A
Cited
US2722575A
Cited
US2844675A
Cited
US3062326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |