US3900816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic driven variable resistance device
Assignee: Alps Alpine Co Ltd
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Filing: 1974-10-29
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Granted: 1975-08-19
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Expires: 1994-10-29
Abstract
Abstract An electromagnetic driven variable electrical resistance device has a variable resistor mounted onto the front side of a case and provided with a rotatable shaft to which a drive-gear is attached. A pair of solenoids are mounted onto the bottom panel portion of the case. A pair of movable driving-pawl members are pivotally supported by the recess portions of an E-shaped spacer attached to the case and are biased by a pair of spring means and held in an upper limit position by a T-shaped stopper plate. A wide blade portion of each driving-pawl member is positioned above each solenoid respectively. The T-shaped stopper plate has a central projecting blade-portion borne by the rotatable shaft of variable resistor. Each of the movable driving-pawl members is twisted. The E-shaped spacer is made of non-metallic material and has a thin central flap-portion and a pair of thick side flapportions.
Inventors
- 👤 Tetsuhiro Kiyono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:07
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
An electromagnetic driven variable resistance device comprising a case having side walls, a variable resistor provided with a rotating shaft and mounted onto one side-face of said case, said shaft being rotataBle to vary resistance value of said resistance device, a drive-gear rotatably mounted on said rotating shaft, a pair of electromagnetic solenoids mounted to said case and having electrical terminals, a pair of movable driving-pawl members made of magnetic material each of which is pivotally mounted in relationship to said solenoid and positioned above said solenoids and able to engage a tooth of said drive-gear so as to rotate said drive-gear, a stopper plate attached to said case for position-limitation of said pair of movable driving-pawl members, and a spacer being attached to said case for pivotally supporting said pair of movable driving-pawl members, said stopper plate and said spacer being made of non-metallic material.
Claim 2
Dependent Claim
146 words
An electromagnetic driven variable resistance device comprising a case having side walls, a variable resistor provided with a rotating shaft and mounted onto one side-face of said case, said shaft being rotataBle to vary resistance value of said resistance device, a drive-gear rotatably mounted on said rotating shaft, a pair of electromagnetic solenoids mounted to said case and having electrical terminals, a pair of movable driving-pawl members made of magnetic material each of which is pivotally mounted in relationship to said solenoid and positioned above said solenoids and able to engage a tooth of said drive-gear so as to rotate said drive-gear, a stopper plate attached to said case for position-limitation of said pair of movable driving-pawl members, and a spacer being attached to said case for pivotally supporting said pair of movable driving-pawl members, said stopper plate and said spacer being made of non-metallic material.
Claim 3
Dependent Claim
30 words
A variable resistance device as set forth in claim 1, wherein said stopper plate has a central projecting blade-portion which is born by said rotating shaft of said variable resistor.
Claim 4
Dependent Claim
30 words
A variable resistance device as set forth in claim 1, wherein said movable driving-pawl member is twisted at the driving-pawl-portion thereof which engages with a tooth of said drive gear.
Claim 5
Dependent Claim
16 words
A variable resistance device as set forth in claim 1, wherein said spacer being an E-shaped.
Claim 6
Dependent Claim
26 words
A variable resistance device as set forth in claim 4, wherein said E-shaped spacer has a thin central flap-portion and a pair of thick side flap-portions.
Claim 7
Dependent Claim
29 words
A variable resistance device as set forth in claim 4, wherein said solenoid has a bobbin of non-metallic material which projects out over the top of the solenoid-core thereof.
References Cited (Backward Citations)
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US2397922A
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US2499200A
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US2884504A
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US2921284A
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US3335385A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |