Patent US3483547A successfully refreshed from Google Patents.
Patent US3974470A successfully refreshed from Google Patents.
US3974470A
Expired / Lapsed
US
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Multi-stage switching apparatus
Assignee: Lear Corp EEDS and Interiors
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Filing: 1975-08-01
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Granted: 1976-08-10
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Expires: 1995-08-01
Abstract
Abstract A multi-stage switching apparatus adapted to make and break an electrical circuit comprises a first compressible body having a resistance which varies inversely according to its state of compression and a second compressible body having a substantially uniform resistance lower than that of the first body, the two bodies being so arranged that the first body is compressed prior to compression of the second body in response to making of the circuit and is decompressed following decompression of the first body in response to breaking of the circuit.
Inventors
- 👤 Gideon A. DuRocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:29
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/029; H01H13/00; H01H13/02; H01H13/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
An electrical switching device comprising a first body composed of resiliently compressible, non-conductive material containing electrically conductive material having a resistance which varies inversely according to the compression of said first body; and a second body composed of resiliently compressible, non-conductive material containing electrically conductive particles having a substantially uniform resistance lower than that of said conductive material, one of said bodies having an opening extending therethrough and in which the other of said bodies is accommodated.
Claim 2
Dependent Claim
77 words
An electrical switching device comprising a first body composed of resiliently compressible, non-conductive material containing electrically conductive material having a resistance which varies inversely according to the compression of said first body; and a second body composed of resiliently compressible, non-conductive material containing electrically conductive particles having a substantially uniform resistance lower than that of said conductive material, one of said bodies having an opening extending therethrough and in which the other of said bodies is accommodated.
Claim 3
Dependent Claim
16 words
A switch according to claim 1 wherein said one of said bodies is said first body.
Claim 4
Dependent Claim
16 words
A switch according to claim 1 wherein said one of said bodies is said second body.
Claim 5
Dependent Claim
16 words
A switch according to claim 1 wherein said first and second bodies are of different thickness.
Claim 6
Dependent Claim
16 words
A device according to claim 4 wherein said first body is thicker than said second body.
Claim 7
Dependent Claim
21 words
A switch according to claim 1 wherein said first body is non-conductive in the absence of compressive force being applied thereto.
Claim 8
Dependent Claim
21 words
A switch according to claim 1 wherein said second body is non-conductive in the absence of conductive force being applied thereto.
Claim 9
Dependent Claim
21 words
A switch according to claim 1 wherein said second body is conductive in the absence of conductive force being applied thereto.
Claim 10
Dependent Claim
39 words
A switch according to claim 1 wherein one of said bodies is non-conductive in the absence of conductive force being applied thereto and the other of said bodies is conductive in the absence of compressive force being applied thereto.
Claim 11
Dependent Claim
22 words
A switch according to claim 1 wherein neither of said bodies is conductive in the absence of compressive force being applied thereto.
References Cited (Backward Citations)
US2596420A
Cited
US3386067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |