US4413252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitive switch and panel
Assignee: Robertshaw Controls Co
•
Filing: 1980-03-21
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Granted: 1983-11-01
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Expires: 2000-03-21
Abstract
Abstract A user, touch actuable capacitive switch for changing the level of an output signal to an electrical circuit. The switch includes an external, user touchable capacitive plate formed on a first dielectric panel and two internal capacitive plates formed on a second dielectric panel affixed to the first flexible dielectric panel, the two internal capacitive plates being oppositely disposed from said external capacitive plate on opposite sides of said second dielectric panel. Electrically conductive paths on the second dielectric panel interconnect the internal capacitive plates to the electrical circuit. A trim tab formed on the second dielectric panel permits the adjustment of the change of level of the output signal upon actuation of the capacitive switch.
Inventors
- 👤 Hugh J. Tyler
- 👤 William H. Conway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:08
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/965; H03K17/975; H03K17/98; H03K17/96; H03K17/962; H03K2217/00; H03K2217/94; H03K2217/94057; H03K2217/94073; H03K2217/96; H03K2217/96015; H03K2217/96023; H03K2217/96062; H03K2217/9607; H03K2217/960755; H03K2217/96076
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
150 words
A user, touch actuable capacitive switch panel for changing the level of an output signal to an electrical circuit means comprising: a first dielectric panel having a plurality of external, user touchable capacitive plates formed thereon arranged as a keyboard; a second flexible dielectric panel having a plurality of pairs of internal capacitive plates formed thereon affixed to said first dielectric panel, two internal capacitive plates forming each pair of capacitive plates being oppositely disposed from one of said external capacitive plates on opposite sides of said second flexible dielectric panel forming a plurality of capacitive switches on said switch panel; electrically conductive paths formed on said second flexible dielectric panel for interconnecting said internal capacitive plates to said electrical circuit means; and trim means formed on said second flexible dielectric panel for adjusting the change of level of the output signal upon actuation of each of said capacitive switches.
Claim 2
Dependent Claim
150 words
A user, touch actuable capacitive switch panel for changing the level of an output signal to an electrical circuit means comprising: a first dielectric panel having a plurality of external, user touchable capacitive plates formed thereon arranged as a keyboard; a second flexible dielectric panel having a plurality of pairs of internal capacitive plates formed thereon affixed to said first dielectric panel, two internal capacitive plates forming each pair of capacitive plates being oppositely disposed from one of said external capacitive plates on opposite sides of said second flexible dielectric panel forming a plurality of capacitive switches on said switch panel; electrically conductive paths formed on said second flexible dielectric panel for interconnecting said internal capacitive plates to said electrical circuit means; and trim means formed on said second flexible dielectric panel for adjusting the change of level of the output signal upon actuation of each of said capacitive switches.
Claim 3
Dependent Claim
28 words
A capacitive switch as defined in claim 1 wherein said first dielectric panel is transparent and said second flexible dielectric panel has colored surfaces and identifying indicia thereon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |