US3815076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary driven variable resistor
Assignee: Alps Alpine Co Ltd
•
Filing: 1973-05-21
•
Granted: 1974-06-04
•
Expires: 1993-05-21
Abstract
Abstract A rotary driven variable resistor comprises a casing, a screwthreaded shaft rotatably mounted in the casing, a resistance element disposed longitudinally in the casing, and a sliding contact positioned in the casing and on the resistance element. The sliding contact is made of a resilient metal plate and is formed into an upper surface plate and a contact plate integrally connected together. The upper surface plate has a reversed channel configuration and is partly cut out to provide a centrally located projection engageable with the screw-threaded shaft. The contact plate is bent back downwardly and formed into an inverted chevron shape with at least one contact formed on the rear side of the apex portion, so that when a free end of the contact plate resiliently abuts an end of the upper surface plate, a well balanced spring force is applied to the contact.
Inventors
- 👤 M Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:43
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/38; H01C10/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A rotary driven variable resistor comprising a casing, a screw-threaded shaft rotatably mounted in the casing, a resistance element disposed longitudinally on the bottom of the casing, and a sliding contact placed on the resistance element and driven by said screw-threaded shaft along the resistance element wherein said sliding contact is of a resilient metal plate formed into a reversed-channel shaped upper surface plate and a contact plate integrally connected together, said upper surface plate being partly cut out thereby to obtain a centrally located projection engageable with said screw-threaded shaft, said contact plate being bent back downwardly and formed into an inverted chevron-like configuration with at least a contact formed on the rear side of the apex, and a free end of said contact plate resiliently abuting an end of said upper surface plate, to provide a well balanced spring force to the contact slidably contacting said resistance element.
Claim 2
Dependent Claim
150 words
A rotary driven variable resistor comprising a casing, a screw-threaded shaft rotatably mounted in the casing, a resistance element disposed longitudinally on the bottom of the casing, and a sliding contact placed on the resistance element and driven by said screw-threaded shaft along the resistance element wherein said sliding contact is of a resilient metal plate formed into a reversed-channel shaped upper surface plate and a contact plate integrally connected together, said upper surface plate being partly cut out thereby to obtain a centrally located projection engageable with said screw-threaded shaft, said contact plate being bent back downwardly and formed into an inverted chevron-like configuration with at least a contact formed on the rear side of the apex, and a free end of said contact plate resiliently abuting an end of said upper surface plate, to provide a well balanced spring force to the contact slidably contacting said resistance element.
Claim 3
Dependent Claim
34 words
A rotary driven variable resistor as set forth in claim 1 wherein said upper surface plate formed into a reversed-channel configuration has two side walls slidably abutting against two inner walls of the casing.
Claim 4
Dependent Claim
44 words
A rotary driven variable resistor as set forth in claim 2 wherein a guiding step is provided in each of the two inner walls of the casing, and said two side walls of the upper surface plate are guided on said two guiding steps.
Claim 5
Dependent Claim
29 words
A rotary driven variable resistor as set forth in claim 1 wherein said centrally located projection of the sliding contact is engaging with a valley of said screw-threaded shaft.
Claim 6
Dependent Claim
26 words
A rotary driven variable resistor as set forth in claim 1 wherein a required number of terminals are provided through this bottom wall of the casing.
Claim 7
Dependent Claim
38 words
A rotary driven variable resistor as set forth in claim 1 wherein a pair of holes are further provided in the upper surface plate, and an indicator is secured to the upper surface plate utilizing said two holes.
Claim 8
Dependent Claim
31 words
A rotary driven variable resistor as set forth in claim 1 wherein two contacts aligned transversely are provided on the rear side of the apex of the inverted chevron-like contact plate.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |