US3293640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic systems keyboard and switch matrix
Assignee: Individual
•
Filing: 1964-05-22
•
Granted: 1966-12-20
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Expires: 1984-05-22
Abstract
No abstract record available.
Inventors
- 👤 Chalfin Albert
- 👤 Schneider Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:10
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/965; H03K17/975; H03K17/98
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
AN ELECTRONIC SWITCH ELEMENT FOR CAPACITANCE CONTROL OF A CIRCUIT FUNCTION, COMPRISING IN COMBINATION, A CONDUCTIVE BASEPLATE, AN INSULATING SPACER PLATE BONDED TO SAID BASE PLATE AND PROVIDING A RECESS THEREIN, A CONDUCTIVE DISK IN SAID RECESS HAVING AN INSULATING DIELECTRIC SURFACE COATING, MEANS ENGAGING SAID DISK ALONG ONE DIELECTRIC SURFACE COATING TO RESILIENTLY HOLD SAID DISK WITH SAID SURFACE COATING SPACED FROM SAID BASE PLATE IN A MINIMUM CAPACITIVE RELATION THERETO, A SHEET OF SPRING METAL BONDED TO THE SPACER PLATE ON THE OPPOSITE SIDE FROM THE BASEPLATE TO SEAL SAID SWITCH ELEMENT AGAINST MOISTURE AND GASEOUS ATMOSPHERES, AND A DEPRESSIBLE OUTWARDLY-BOWED FLEXIBLE CIRCULAR CONTROL ELEMENT INTEGRAL WITH SAID SHEET AND ALIGNED WITH SAID DISK TO SNAP INTO DRIVING ENGAGEMENT THEREWITH WHEN DEPRESSED AND INWARDLY BOWED IN THE OPPOSITE DIRECTION, THEREBY TO RAPIDLY REDUCE THE SPACE BETWEEN THE DISK AND THE BASE PLATE AND BRING THE SAID DIELECTRIC SURFACE COATING INTO CLOSE MAXIMUM CAPACITIVE RELATION WITH THE BASE PLATE FOR EFFECTIVE CAPACITANCE SWITCHING CHANGE AND CIRCUIT CONTROL THEREBY.
Claim 2
Dependent Claim
169 words
AN ELECTRONIC SWITCH ELEMENT FOR CAPACITANCE CONTROL OF A CIRCUIT FUNCTION, COMPRISING IN COMBINATION, A CONDUCTIVE BASEPLATE, AN INSULATING SPACER PLATE BONDED TO SAID BASE PLATE AND PROVIDING A RECESS THEREIN, A CONDUCTIVE DISK IN SAID RECESS HAVING AN INSULATING DIELECTRIC SURFACE COATING, MEANS ENGAGING SAID DISK ALONG ONE DIELECTRIC SURFACE COATING TO RESILIENTLY HOLD SAID DISK WITH SAID SURFACE COATING SPACED FROM SAID BASE PLATE IN A MINIMUM CAPACITIVE RELATION THERETO, A SHEET OF SPRING METAL BONDED TO THE SPACER PLATE ON THE OPPOSITE SIDE FROM THE BASEPLATE TO SEAL SAID SWITCH ELEMENT AGAINST MOISTURE AND GASEOUS ATMOSPHERES, AND A DEPRESSIBLE OUTWARDLY-BOWED FLEXIBLE CIRCULAR CONTROL ELEMENT INTEGRAL WITH SAID SHEET AND ALIGNED WITH SAID DISK TO SNAP INTO DRIVING ENGAGEMENT THEREWITH WHEN DEPRESSED AND INWARDLY BOWED IN THE OPPOSITE DIRECTION, THEREBY TO RAPIDLY REDUCE THE SPACE BETWEEN THE DISK AND THE BASE PLATE AND BRING THE SAID DIELECTRIC SURFACE COATING INTO CLOSE MAXIMUM CAPACITIVE RELATION WITH THE BASE PLATE FOR EFFECTIVE CAPACITANCE SWITCHING CHANGE AND CIRCUIT CONTROL THEREBY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |