US3603756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snap action switch
Assignee: Unisys Corp
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Filing: 1970-01-29
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Granted: 1971-09-07
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Expires: 1990-01-29
Abstract
Abstract An improved electrical switching arrangement wherein a diaphragm-type switch element is operated by a plunger mechanism having a novel molded elastomer return spring operatively associated with the plunger element for providing ''''snap action.
Inventors
- 👤 Frank J Carpentier
- 👤 Stanley J Lins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:48
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/50; H01H13/52; H01H13/70; H01H13/702; H01H13/705; H01H2213/00; H01H2213/002; H01H2215/00; H01H2215/004; H01H2215/006; H01H2215/022; H01H2215/024; H01H2217/00; H01H2217/02; H01H2221/00; H01H2221/05; H01H2221/062; H01H2227/00; H01H2227/022
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
An electrical switch assembly comprising in combination: first and second conductive surfaces; an insulating surface having an aperture therein disposed between said first and second conductive surfaces to normally maintain said conductive surface out of contact with one another; a switch actuating plunger mounted in a guide means for reciprocating motion therein, and a return spring adapted to be mounted on said plunger and placed in a juxtaposed position with respect to said aperture, said return spring comprising a hollow body of elastomeric material having a cylindrical wall portion of a thickness, t, a frustoconical-shaped portion integrally formed on top of said cylindrical portion having a thickness t2<t1, and a top surface extending perpendicular to the common axis of said cylindrical portion and said frustoconical portion, said top surface having formed therein an inwardly extending hollow protrusion aligned with said common axis for frictionally engaging said plunger, wherein pressure applied to said plunger causes said frustoconical portion to telescope within said cylindrical portion.
Claim 2
Dependent Claim
163 words
An electrical switch assembly comprising in combination: first and second conductive surfaces; an insulating surface having an aperture therein disposed between said first and second conductive surfaces to normally maintain said conductive surface out of contact with one another; a switch actuating plunger mounted in a guide means for reciprocating motion therein, and a return spring adapted to be mounted on said plunger and placed in a juxtaposed position with respect to said aperture, said return spring comprising a hollow body of elastomeric material having a cylindrical wall portion of a thickness, t, a frustoconical-shaped portion integrally formed on top of said cylindrical portion having a thickness t2<t1, and a top surface extending perpendicular to the common axis of said cylindrical portion and said frustoconical portion, said top surface having formed therein an inwardly extending hollow protrusion aligned with said common axis for frictionally engaging said plunger, wherein pressure applied to said plunger causes said frustoconical portion to telescope within said cylindrical portion.
Claim 3
Dependent Claim
70 words
An article of manufacture comprising a molded elastomeric material having three concentric portions including a first hollow cylindrical portion of thickness, t1, a second hollow frustoconically shaped portion integrally formed on the upper end of said first portion of a thickness t2<t1 and a third solid cylindrical portion integrally formed on top of said second portion, said third solid cylindrical portion having an inwardly extending hollow protrusion integrally formed therein.
Claim 4
Dependent Claim
70 words
An article of manufacture comprising a molded elastomeric material having three concentric portions including a first hollow cylindrical portion of thickness, t1, a second hollow frustoconically shaped portion integrally formed on the upper end of said first portion of a thickness t2<t1 and a third solid cylindrical portion integrally formed on top of said second portion, said third solid cylindrical portion having an inwardly extending hollow protrusion integrally formed therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |