US4146866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable resistance control
Assignee: Duracell Inc USA
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Filing: 1977-11-14
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Granted: 1979-03-27
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Expires: 1997-11-14
Abstract
Abstract An epoxy glass fabric strip is used to carry a carbon based resistive path.
Inventors
- 👤 Joseph L. Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:42
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/305
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
In a variable resistance control wherein an electrical resistance path and an electrical conductive strip are carried on a base and wherein movable electrical contact means electrically bridge the resistance path and the electrical conductive strip, the improvement comprising: (a) providing a backing means for said resistance path and connecting same to said base, said backing means including an epoxy glass strip characterized by having a high resistance to humidity changes so as to substantially eliminate humidity drift of a resistance value of said resistance path.
Claim 2
Dependent Claim
86 words
In a variable resistance control wherein an electrical resistance path and an electrical conductive strip are carried on a base and wherein movable electrical contact means electrically bridge the resistance path and the electrical conductive strip, the improvement comprising: (a) providing a backing means for said resistance path and connecting same to said base, said backing means including an epoxy glass strip characterized by having a high resistance to humidity changes so as to substantially eliminate humidity drift of a resistance value of said resistance path.
Claim 3
Dependent Claim
24 words
In a variable control according to claim 1 wherein said resistance path comprises a carbon based paint applied to said epoxy glass fabric strip.
Claim 4
Independent Claim
75 words
A method of reducing resistance value drift due to humidity in a variable resistance control wherein a resistance path and an electrical conductive strip are carried on a base and a movable electrical contact means bridges same, comprising (a) providing a backing means for said resistance path including an epoxy glass strip and high resistance to humidity so as to substantially eliminate said resistance value drift, and (b) connecting said backing means to said base.
Claim 5
Independent Claim
75 words
A method of reducing resistance value drift due to humidity in a variable resistance control wherein a resistance path and an electrical conductive strip are carried on a base and a movable electrical contact means bridges same, comprising (a) providing a backing means for said resistance path including an epoxy glass strip and high resistance to humidity so as to substantially eliminate said resistance value drift, and (b) connecting said backing means to said base.
Claim 6
Dependent Claim
22 words
A method according to claim 3 wherein said resistance path comprises a carbon based paint applied to said epoxy glass fabric strip.
Claim 7
Dependent Claim
18 words
A method according to claim 4 wherein said carbon paint is sprayed onto said epoxy glass fabric strip.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |