US3564172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocker arm switch
Assignee: Executone Inc
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Filing: 1968-12-30
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Granted: 1971-02-16
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Expires: 1988-12-30
Abstract
Abstract An improved pileup switch assembly wherein a hairpin spring maintains a pileup position for each switch position.
Inventors
- 👤 Alfred Laakso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:41
CPC Classifications
H; H01; H01H; H01H23/00; H01H23/02; H01H23/12; H01H23/16; H01H23/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
In a pileup switch having a frame, a fingertip operated rocker arm pivotally mounted on said frame and having stop positions on either side of the pivot point thereof, a lever arm dependent from said rocker arm, the end of which moves in a minor arc the limits of which on either side of a dead center position are proscribed by said stop positions, two sets of normally open electrical contact strips, one on either side of said dead center position and adapted to be placed in a closed position when said lever arm is positioned thereagainst; a hairpin spring adapted to so position said lever arm alternately against one or the other of said electrical contact strips; comprising a generally Ushaped hairpin spring one end of which is attached to said frame in a position below the end of said lever arm and the other end of which is attached to the end of said lever arm, and a pivot attached to said frame at a point generally in line with said minor arc and to one side of said dead center, said hairpin spring passing thereabout and being pivotally retained by said pivot, said hairpin spring being effective to snap said lever over to said stop position in the direction of movement of said lever arm past said dead center.
Claim 2
Dependent Claim
222 words
In a pileup switch having a frame, a fingertip operated rocker arm pivotally mounted on said frame and having stop positions on either side of the pivot point thereof, a lever arm dependent from said rocker arm, the end of which moves in a minor arc the limits of which on either side of a dead center position are proscribed by said stop positions, two sets of normally open electrical contact strips, one on either side of said dead center position and adapted to be placed in a closed position when said lever arm is positioned thereagainst; a hairpin spring adapted to so position said lever arm alternately against one or the other of said electrical contact strips; comprising a generally Ushaped hairpin spring one end of which is attached to said frame in a position below the end of said lever arm and the other end of which is attached to the end of said lever arm, and a pivot attached to said frame at a point generally in line with said minor arc and to one side of said dead center, said hairpin spring passing thereabout and being pivotally retained by said pivot, said hairpin spring being effective to snap said lever over to said stop position in the direction of movement of said lever arm past said dead center.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |