Patent US3719915A successfully refreshed from Google Patents.
US3719915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coarse and fine adjustment potentiometer
Assignee: Stackpole Carbon Co
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Filing: 1972-05-22
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Granted: 1973-03-06
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Expires: 1992-05-22
Abstract
Abstract The front wall of a linear motion potentiometer case has a longitudinal slot in it, in which is disposed a slide that carries a bridging contact in sliding engagement with resistance and collector elements inside the case. The slide has laterally spaced side walls projecting forward from the slot and provided with a pair of opposed transverse openings elongated forward and receiving the hubs of a wheel fitting between the walls. The wheel is encircled by a friction ring and the hubs are movable rearwardly in the wall openings by finger pressure applied to the front portion of the ring to press it against the case at the opposite edges of the slot so that the ring will roll along the case when the ring is rotated and carry the slide with it.
Inventors
- 👤 M Bang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:25
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
A coarse and fine adjustment linear motion potentiometer comprising an elongated case having a front and back connected by side walls, the front of the case having a longitudinal slot therein, resistance and collector elements disposed in the case lengthwise thereof, a slide disposed in said slot and movable lengthwise thereof, a bridging contact inside the case carried by the slide in sliding engagement with said elements, said slide having laterally spaced side walls projecting forward from said slot and provided with a pair of opposed transverse openings elongated forward, a wheel fitting between said walls and having hubs rotatably disposed in said openings and movable only lengthwise thereof, and a friction ring encircling the wheel and rigidly mounted thereon, said hubs being movable rearwardly in said openings by finger pressure applied to the front portion of the ring to press the ring against the case at the opposite edges of said slot so that the ring will roll along the case when the ring is rotated and carry the slide with it.
Claim 2
Dependent Claim
173 words
A coarse and fine adjustment linear motion potentiometer comprising an elongated case having a front and back connected by side walls, the front of the case having a longitudinal slot therein, resistance and collector elements disposed in the case lengthwise thereof, a slide disposed in said slot and movable lengthwise thereof, a bridging contact inside the case carried by the slide in sliding engagement with said elements, said slide having laterally spaced side walls projecting forward from said slot and provided with a pair of opposed transverse openings elongated forward, a wheel fitting between said walls and having hubs rotatably disposed in said openings and movable only lengthwise thereof, and a friction ring encircling the wheel and rigidly mounted thereon, said hubs being movable rearwardly in said openings by finger pressure applied to the front portion of the ring to press the ring against the case at the opposite edges of said slot so that the ring will roll along the case when the ring is rotated and carry the slide with it.
Claim 3
Dependent Claim
173 words
A coarse and fine adjustment linear motion potentiometer comprising an elongated case having a front and back connected by side walls, the front of the case having a longitudinal slot therein, resistance and collector elements disposed in the case lengthwise thereof, a slide disposed in said slot and movable lengthwise thereof, a bridging contact inside the case carried by the slide in sliding engagement with said elements, said slide having laterally spaced side walls projecting forward from said slot and provided with a pair of opposed transverse openings elongated forward, a wheel fitting between said walls and having hubs rotatably disposed in said openings and movable only lengthwise thereof, and a friction ring encircling the wheel and rigidly mounted thereon, said hubs being movable rearwardly in said openings by finger pressure applied to the front portion of the ring to press the ring against the case at the opposite edges of said slot so that the ring will roll along the case when the ring is rotated and carry the slide with it.
Claim 4
Dependent Claim
173 words
A coarse and fine adjustment linear motion potentiometer comprising an elongated case having a front and back connected by side walls, the front of the case having a longitudinal slot therein, resistance and collector elements disposed in the case lengthwise thereof, a slide disposed in said slot and movable lengthwise thereof, a bridging contact inside the case carried by the slide in sliding engagement with said elements, said slide having laterally spaced side walls projecting forward from said slot and provided with a pair of opposed transverse openings elongated forward, a wheel fitting between said walls and having hubs rotatably disposed in said openings and movable only lengthwise thereof, and a friction ring encircling the wheel and rigidly mounted thereon, said hubs being movable rearwardly in said openings by finger pressure applied to the front portion of the ring to press the ring against the case at the opposite edges of said slot so that the ring will roll along the case when the ring is rotated and carry the slide with it.
Claim 5
Dependent Claim
77 words
A potentiometer according to claim 1, in which said wheel is provided in each side with an annular recess around the adjoining hub, the thickness of the central hub portion of the wheel is substantially the same as its rim portion around said recesses, said side walls have annular portions disposed in said recesses, and the outer surfaces of said side walls in front of said openings are substantially flush with the outer ends of the hubs.
Claim 6
Dependent Claim
25 words
A potentiometer according to claim 2, in which said substantially flush surfaces extend back to lines close to the rear ends of said elongated openings.
Claim 7
Dependent Claim
46 words
A potentiometer according to claim 2, in which said slide has end walls projecting forward beside said ring for gripping between the fingers to move the slide along the case, and the front end portions of said end walls are substantially as narrow as said wheel.
Claim 8
Dependent Claim
71 words
A potentiometer according to claim 1, in which the opposite sides of said wheel are flat and said hubs project from them into said openings, the front ends of said openings are open but narrower than the hubs, and the sides of said front ends of the openings are adapted to be sprung apart by pressure of the hubs against them to permit the hubs to be snapped into the openings.
References Cited (Backward Citations)
US3504326A
Cited
US3525970A
Cited
US3582860A
Cited
US3555484A
Cited
US3617979A
Cited
US3670286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |