Patent US3657692A successfully refreshed from Google Patents.
US3657692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trimmer resistor
Assignee: Markite Corp
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Filing: 1971-03-12
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Granted: 1972-04-18
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Expires: 1991-03-12
Abstract
Abstract A variable resistance pad comprising a strip of conductive material which has a channel formed partly therein. Resistive material fills at least a portion of said channel which has a specified shape including a converging section. Electrical terminals are connected to the conductive material on opposite sides of the channel. The resistance may be varied by trimming away portions of the conductive material to decrease the channel length.
Inventors
- 👤 Hans H Wormser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:36
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/23; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
50 words
A variable resistance pad comprising a strip of conductive material having a channel formed partly therein, resistive material filling at least a portion of said channel and having a specified shape including a converging section, and electrical terminals respectiveLy connected to said conductive material on opposite sides of said channel.
Claim 2
Dependent Claim
50 words
A variable resistance pad comprising a strip of conductive material having a channel formed partly therein, resistive material filling at least a portion of said channel and having a specified shape including a converging section, and electrical terminals respectiveLy connected to said conductive material on opposite sides of said channel.
Claim 3
Dependent Claim
24 words
A variable resistance pad as in claim 1, wherein said conductive material presents a path around said channel for electron flow between said terminals.
Claim 4
Dependent Claim
23 words
A variable resistance pad as in claim 1 wherein said conductive material with said resistive material therein is connected to an insulating substrate.
Claim 5
Dependent Claim
22 words
A variable resistance pad as in claim 1 wherein the shape of said channel conforms to the shape of said resistive material.
Claim 6
Dependent Claim
28 words
A variable resistance pad as in claim 1 wherein said shape includes a forward part having said converging section and a rearward part extending from said forward part.
Claim 7
Dependent Claim
32 words
A variable resistance pad as in claim 5 wherein said forward section is shaped in the form of an arrowhead and said rearward section is shaped in the form of a shaft.
Claim 8
Dependent Claim
22 words
A variable resistance pad as in claim 1 wherein said converging section has sides which converge according to a given functional relationship.
Claim 9
Dependent Claim
18 words
A variable resistance pad as in claim 1 wherein said converging section has sides which are convex shaped.
Claim 10
Dependent Claim
18 words
A variable resistance pad as in claim 1 wherein said converging section has sides which are concave shaped.
Claim 11
Dependent Claim
22 words
A variable resistance pad as in claim 1 wherein said conductive and resistive material is bonded onto the surface of said substrate.
Claim 12
Dependent Claim
19 words
A variable resistance pad as in claim 1 wherein said conductive and resistive material is imbedded within said substrate.
Claim 13
Dependent Claim
13 words
A variable resistance pad as in claim 1 wherein said substrate is flexible.
Claim 14
Dependent Claim
16 words
A variable resistance pad as in claim 1 further including wires electrically connected to said terminals.
Claim 15
Dependent Claim
59 words
A variable resistance pad comprising a strip of highly conductive material having a channel formed partly therein, said channel being in the shape of an arrowhead and shaft, a resistive material completely filling said arrowhead shape and a portion of the length of the shaft shape and a substrate, said conductive and resistive material being attached to said substrate.
Claim 16
Dependent Claim
59 words
A variable resistance pad comprising a strip of highly conductive material having a channel formed partly therein, said channel being in the shape of an arrowhead and shaft, a resistive material completely filling said arrowhead shape and a portion of the length of the shaft shape and a substrate, said conductive and resistive material being attached to said substrate.
Claim 17
Dependent Claim
27 words
A variable resistance pad as in claim 14 further including electrical terminals connected to the ends of said conductive material at opposite sides of said channel shape.
Claim 18
Dependent Claim
26 words
A variable resistance pad as in claim 14 wherein said pad is of material which can be trimmed by cutting off successive sections of said pad.
Claim 19
Dependent Claim
69 words
In a variable resistance pad having a strip of conductive material including a channel formed partly therein, resistive material filling at least a portion of said channel and having a specified shape including a converging section, the method of varying the resistance thereof including the steps of cutting the conductive material into two sections, each on opposite sides of the channel, and successively removing sections of the resistive material.
Claim 20
Dependent Claim
69 words
In a variable resistance pad having a strip of conductive material including a channel formed partly therein, resistive material filling at least a portion of said channel and having a specified shape including a converging section, the method of varying the resistance thereof including the steps of cutting the conductive material into two sections, each on opposite sides of the channel, and successively removing sections of the resistive material.
Claim 21
Dependent Claim
16 words
The method of claim 17 wherein said step of removing is achieved by trimming the pad.
Claim 22
Dependent Claim
26 words
The method of claim 17 wherein said step of removing is achieved by cutting a channel into the end of said pad containing the resistive material.
Claim 23
Dependent Claim
25 words
The method of claim 17 further comprising the steps of completely coating said pad with insulating material after a desired value of resistance is achieved.
References Cited (Backward Citations)
US3441804A
Cited
US3473146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |