Electronic touch key
Abstract
Abstract Electronic touch key assembly with a metal probe having touch or keying surfaces through which, when the surfaces are contacted, a capacitive reactive current flows, triggering a switching amplifier through which an electronic valve for controlling brightness of a lamp is opened, including a high resistance serially connected to the touch or keying surfaces, the surfaces being formed of metal and being insulated from one another, a filter and a rectifier connected to the high resistance, the high resistance serving through the filter and the rectifier as a voltage source, a first and a second bistable multivibrator, the voltage source having an output connected to the second bistable multivibrator, the first bistable multivibrator being connected to the second bistable multivibrator and serving as a switching amplifier which, at a defined voltage threshold of the line voltage, sets the second bistable multivibrator into an opposite output state, a PNP transistor having a base, the second bistable multivibrator having an output connected to the base of the PNP transistor for addressing the latter, the electronic valve including a Triac, and the transistor being connected to the Triac for driving the same.
Inventors
- 👤 Joachim Pohl
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |