Patent US4785278A successfully refreshed from Google Patents.
US4785278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable resistor
Assignee: Murata Manufacturing Co Ltd
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Filing: 1987-09-29
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Granted: 1988-11-15
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Expires: 2007-09-29
Abstract
Abstract A variable resistor wherein the arm portion of a rotatable slider is in contact against an approximately circular arc-shaped resistor provided on a base plate with the central portion of the resistor, and the slider is provided with a driver plate having an approximately dish-shaped projection portion at its center, and an approximately ring-shaped arm portion having a contact portion, which are coupled to each other, are punched out from one sheet of conductive sheet metal, are turned up by 180° at the coupling portion, with the projection portion being projected from the arm portion.
Inventors
- 👤 Hideo Nishizawa
- 👤 Yukinori Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/16; H01C10/20; H01C10/005; H01C10/30; H01C10/32; H01C10/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
A variable resistor comprising a base plate having a hole at its center and a resistor around the hole, a slider provided with, at its one end, a driver plate having an approximately dish-shaped projection at its center, and an approximately ring-shaped arm portion having a contact point portion, which are coupled to each other at a coupling portion of the both ends, are punched out from one piece of conductive sheet metal and are turned up by 180° at the coupling portion with the projection portion being projected from an arm portion, and a terminal plate having a cylindrical portion inserted through the hole of the base plate and engaged into the hole of the projection portion of the driver plate, the driver plate being rotatably mounted onto the base plate through the terminal plate.
Claim 2
Dependent Claim
136 words
A variable resistor comprising a base plate having a hole at its center and a resistor around the hole, a slider provided with, at its one end, a driver plate having an approximately dish-shaped projection at its center, and an approximately ring-shaped arm portion having a contact point portion, which are coupled to each other at a coupling portion of the both ends, are punched out from one piece of conductive sheet metal and are turned up by 180° at the coupling portion with the projection portion being projected from an arm portion, and a terminal plate having a cylindrical portion inserted through the hole of the base plate and engaged into the hole of the projection portion of the driver plate, the driver plate being rotatably mounted onto the base plate through the terminal plate.
Claim 3
Dependent Claim
29 words
The variable resistor as claimed in claim 1, wherein the driver plate is positioned extendingly to the outside of the arm portion in order to protect the arm portion.
Claim 4
Dependent Claim
23 words
The variable resistor as claimed in claim 1, wherein the driver plate is provided with a groove to use for a plus driver.
Claim 5
Dependent Claim
23 words
The variable resistor as claimed in claim 1, wherein the driver plate is provided with a groove to use for a minus driver.
References Cited (Backward Citations)
US4736184A
Cited
US4721940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |