Sequential flasher
Abstract
Abstract A sequential flasher includes a plurality of successive stages connected in cascade and each including a PNP transistor, having its emitter connected to the positive terminal of a source of potential, and an NPN transistor. Each stage includes a first loop constituted by the emitter of the PNP transistor, a resistor connecting the base thereof to the collector of the NPN transistor, and a resistor and a condenser connected in series between the base of the NPN transistor and the collector of the PNP transistor. A second loop is constituted by a resistance connecting the emitter of the NPN transistor to the junction of the resistor and the condenser. Each stage has a respective load connected between the collector of its PNP transistor and the negative terminal of the source. The collector of each PNP transistor, except that of the last stage, is connected to the emitter of the NPN transistor of the next succeeding stage, with the collector of the last PNP transistor being connected to the emitter of the NPN transistor. The resistance may be a resistor or may be a diode. A starting condenser is connected in at least the first stage.
Inventors
- 👤 Tetsuji Shimizu
- 👤 Susumu Usami
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |