US3914728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable resistor provided with means for memorizing a set value of resistance
Assignee: Panasonic Holdings Corp
•
Filing: 1974-07-09
•
Granted: 1975-10-21
•
Expires: 1994-07-09
Abstract
Abstract A variable resistor having a slidable member carrying a rotatable roller and a movable push rod, wherein a contact provided on the periphery of the roller can be brought into contact with a conductive rail by operating the push rod with the slidable member held at any desired position. With this means, a preset value of resistance can be readily reproduced.
Inventors
- 👤 Matsuo Nishioka
- 👤 Shunzo Oka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:21
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/38
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
121 words
A variable resistor provided with means for memorizing a set value of resistance comprising a move means movable over a resistor element of the variable resistor, a roller rotatably mounted on said move means, a contact member provided on the periphery of said roller, and a conductive rail having a length within the movable range of said move means, said conductive rail being always in contact with the periphery of said roller, said contact member and said rail constituting a switch in which said contact member is adpated to be made to come into contact with said rail at any desired position of said move means when said move means in operated to vary the resistance value of the variable resistor.
Claim 2
Dependent Claim
121 words
A variable resistor provided with means for memorizing a set value of resistance comprising a move means movable over a resistor element of the variable resistor, a roller rotatably mounted on said move means, a contact member provided on the periphery of said roller, and a conductive rail having a length within the movable range of said move means, said conductive rail being always in contact with the periphery of said roller, said contact member and said rail constituting a switch in which said contact member is adpated to be made to come into contact with said rail at any desired position of said move means when said move means in operated to vary the resistance value of the variable resistor.
Claim 3
Dependent Claim
61 words
A variable resistor provided with means for memorizing a set value of resistance according to claim 1, which further comprises a vertically movable push rod carried by said move means, said roller being adapted to be forcibly rotated to bring said contact member into contact with said rail by operating said push rod at any desired position of said move means.
Claim 4
Dependent Claim
35 words
A variable resistor provided with means for memorizing a set value of resistance according to claim 1, which further comprises a display means operated by the switch constituted by said contact member and said rail.
Claim 5
Dependent Claim
26 words
A variable resistor provided with means for memorizing a set value of resistance according to claim 1 wherein said move means comprises means of slidable type.
Claim 6
Dependent Claim
145 words
A variable resistor provided with means for memorizing a set value of resistance comprising a move means movable over a resistor element of the variable resistor, a roller rotatably mounted on said move means, a contact member provided on the periphery of said roller, a cam secured to one side of said roller and coaxial therewith, a conductive rail having a length within the movable range of said move means and always in contact with the periphery of said roller, and a vertically movable push rod carried by said move means, said move means being movable to vary the resistance of the variable resistor, said contact member being adapted to be made to come into contact with said rail with the forced rotation of said roller in unison with said cam caused by depressing said push rod at any desired position of said move means.
Claim 7
Dependent Claim
145 words
A variable resistor provided with means for memorizing a set value of resistance comprising a move means movable over a resistor element of the variable resistor, a roller rotatably mounted on said move means, a contact member provided on the periphery of said roller, a cam secured to one side of said roller and coaxial therewith, a conductive rail having a length within the movable range of said move means and always in contact with the periphery of said roller, and a vertically movable push rod carried by said move means, said move means being movable to vary the resistance of the variable resistor, said contact member being adapted to be made to come into contact with said rail with the forced rotation of said roller in unison with said cam caused by depressing said push rod at any desired position of said move means.
Claim 8
Dependent Claim
24 words
A variable resistor provided with means for memorizing a set value of resistance according to claim 5, wherein said cam comprises an eccentric cam.
Claim 9
Dependent Claim
71 words
A variable resistor provided with means for memorizing a set value of resistance according to claim 5, wherein said push rod is provided at a lower portion thereof with a cam operating means having a slanted face, said slanted face of said cam operating means being adapted to be urged against the periphery of said cam to cause forced rotation of said roller at the time of depressing said push rod.
Claim 10
Dependent Claim
42 words
A variable resistor provided with means for memorizing a set value of resistance according to claim 5, wherein said contact member is adapted to be electrically connected to switch terminals provided on the outer side of a housing of the variable resistor.
Claim 11
Dependent Claim
26 words
A variable resistor provided with means for memorizing a set value of resistance according to claim 5, wherein said move means comprises means of slidable type.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |