Patent US4897629A successfully refreshed from Google Patents.
US4897629A
Expired / Lapsed
US
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Electrical control device
Assignee: GOULD INSTRUMENT SYSTEMS Ltd
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Filing: 1988-04-04
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Granted: 1990-01-30
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Expires: 2008-04-04
Abstract
Abstract An electrical control device (8) is operable by a lever (12) and includes a deformable member (50) which is deformed in response to manual pressure on the lever. The deformable member (50) has an electrically conductive surface portion (52) which is arranged to engage a continuous area or track of resistive material (62) such that as a changing manual pressure is applied to the lever (12) a changing amount of the track is electrically bridged or short circuited by said conductive surface portions (52). The resistive area or track is connected to electrical terminals (64, 66) so as to present a continuously variable electrical resistance across the terminals depending on the manual pressure applied.
Inventors
- 👤 Thomas H. Lecklider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:49
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/16; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; G05G2009/04703; G05G2009/04722; G05G2009/0474; G05G2009/04744; H; H01; H01H; H01H2239/00; H01H2239/078
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
An electrical control apparatus, comprising: a substrate a continuous resistive track positioned on said substrate; a first electrical terminal connected to said continuous resistive track; a second electrical terminal connected to said continuous resistive track; a deformable curved member bridging a portion of said continuous resistive track and supported by said substrate; a deformable conductive member supported by said deformable curved member and curved oppositely to said deformable curved member; and means connected to said deformable conductive member, for transmitting a force to said deformable conductive member to bring said deformable conductive member into contact with said continuous resistive track and for varying the electrical impedance between said first terminal and said second terminal in a manner related to the amount of force supplied to said deformable curved member.
Claim 2
Dependent Claim
129 words
An electrical control apparatus, comprising: a substrate a continuous resistive track positioned on said substrate; a first electrical terminal connected to said continuous resistive track; a second electrical terminal connected to said continuous resistive track; a deformable curved member bridging a portion of said continuous resistive track and supported by said substrate; a deformable conductive member supported by said deformable curved member and curved oppositely to said deformable curved member; and means connected to said deformable conductive member, for transmitting a force to said deformable conductive member to bring said deformable conductive member into contact with said continuous resistive track and for varying the electrical impedance between said first terminal and said second terminal in a manner related to the amount of force supplied to said deformable curved member.
Claim 3
Dependent Claim
18 words
An electrical control device as defined in claim 1, wherein said force transmitting means further comprises a lever.
Claim 4
Dependent Claim
29 words
An electrical control device as defined in claim 2, wherein said force transmitting means further comprises a pressure member engaged by said lever and engaging said deformable conductive member.
Claim 5
Dependent Claim
24 words
An electrical control device as defined in claim 1, wherein said force transmitting means further comprises a pressure member engaging said deformable conductive member.
References Cited (Backward Citations)
US4493219A
Cited
US4599496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |