Antenna system for proximity control
Abstract
Abstract COVERS TO PLUMBING AND OTHER SYSTEMS WHICH RESPOND, FOR EXAMPLE, TO THE APPROACH OR WITHDRAWAL OF A USER. THE ARRANGEMENT INCLUDES A PRIMARY ANTENNA STRUCTURE WHICH CHANGES IN ELECTRICAL CAPACITANCE IN RESPONSE TO THE APPROACH OR WITHDRAWAL OF THE USER, A CONTROL CIRCUIT CONNECTED TO THE ANTENNA STRUCTURE, AND A TRANSLATING DEVICE, SUCH AS A VALVE WHICH IS TO BE OPERATED OR RELEASED. THE ARRANGEMENT INCLUDES A SECONDARY ANTENNA TO RENDER THE PRIMARY ANTENNA STRUCTURE MORE SENSITIVE. A COAXIAL CABLE SYSTEM INTERCONNECTS THE PRIMARY ANTENNA STRUCTURE TO THE CONTROL CIRCUIT. WHEN THE ARRANGEMENT IS APPLIED TO A PLUMBING FIXTURE, A GROUNDED SHIELD IS APPLIED TO THE PLUMBING FIXTURE.
Inventors
- 👤 Norman Arthur Forbes
Bibliographic Details
Claims Analysis
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |