US3846731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable resistance assembly
Assignee: AMERICAN PLASTICRAFT Co
•
Filing: 1972-12-29
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Granted: 1974-11-05
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Expires: 1992-12-29
Abstract
Abstract An assembly having a variable resistance for providing a variable voltage dividing function, and; hence, a controllable voltage such as to the anode of a television picture tube.
Inventors
- 👤 C Dumas
- 👤 L Aubel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:58
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/46; H01C10/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A variable resistance assembly comprising an electrically non-conductive substrate having at least three terminal pads, first and second electrically resistive paths on said substrate, said paths being electrically separated one from the other, the first resistive path having one end connected to one terminal and the second resistive path dividing into a first portion which connects to a second terminal pad and another portion which connects to a third terminal pad, and the resistive paths each having an electrically open or unconnected end, and an electrically conductive contactor engaging said first and second paths, said contactor being selectively adjustable to increase and decrease the effective length of the resistive paths and hence the effective electrical resistance thereof.
Claim 2
Dependent Claim
117 words
A variable resistance assembly comprising an electrically non-conductive substrate having at least three terminal pads, first and second electrically resistive paths on said substrate, said paths being electrically separated one from the other, the first resistive path having one end connected to one terminal and the second resistive path dividing into a first portion which connects to a second terminal pad and another portion which connects to a third terminal pad, and the resistive paths each having an electrically open or unconnected end, and an electrically conductive contactor engaging said first and second paths, said contactor being selectively adjustable to increase and decrease the effective length of the resistive paths and hence the effective electrical resistance thereof.
Claim 3
Dependent Claim
43 words
A variable resistance assembly as in claim 1 wherein the open end portions of the resistive path are in a circular shape, and the conductive contactor is rotatable relative to engage the resistive paths to change the effective resistance of said resistive paths.
Claim 4
Dependent Claim
76 words
A variable resistance assembly as in claim 1 wherein a terminal pad and the first resistive path is connectable to a source of high voltage, the one portion of said second resistive path and the associated terminal pad is connectable to provide a focus anode voltage, and the other portion of said second resistive path is connectable to a reference potential whereby by adjusting the contactor the voltage provided to the focus anode can be controlled.
Claim 5
Dependent Claim
25 words
A variable resistance assembly as in claim 1, said resistive paths have one end connected to a conductive pad and the other end is open.
Claim 6
Dependent Claim
19 words
A variable resistance assembly as in claim 1 wherein said resistive paths are formed of a thick film material.
References Cited (Backward Citations)
US1717913A
Cited
US3585559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |