Patent US4068149A successfully refreshed from Google Patents.
US4068149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flasher circuit with low power drain
Assignee: Individual
•
Filing: 1975-10-28
•
Granted: 1978-01-10
•
Expires: 1995-10-28
Abstract
Abstract An electronic circuit for flashing an electric lamp is disclosed which may be fabricated from a small number of components and powered by a low-voltage power source which nevertheless assures that the lamp flashes brightly enough to be prominently visible. The on and off times of the lamp are relatively insensitive to temperature variations.
Inventors
- 👤 David G. Wuchinich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:17
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
192 words
An electronic flasher circuit consisting essentially of a. a first transistor and a second transistor, one transistor being a PNP transistor and the other being an NPN transistor; b. conductive means having substantially no resistance connecting a base of the first transistor to a collector of the second transistor; c. resistive means connecting the base of the first transistor to a base of the second transistor; d. means connecting the base of the second transistor to a collector of the first transistor, said means comprising capacitive means and resistive means connected in series; e. a positive power-source terminal and a negative power-source terminal, said power-source terminals being adapted to connect to a direct-current electrical power source; f. conductive means having substantially no resistance connecting the positive power-source terminal to an emitter of the PNP transistor; g. conductive means having substantially no resistance connecting the negative power-source terminal to an emitter of the NPN transistor; and h. a first lamp terminal connected to the collector of the first transistor and a second lamp terminal connected to the emitter of the second transistor, said lamp terminals being adapted to connect to an electric lamp.
Claim 2
Dependent Claim
192 words
An electronic flasher circuit consisting essentially of a. a first transistor and a second transistor, one transistor being a PNP transistor and the other being an NPN transistor; b. conductive means having substantially no resistance connecting a base of the first transistor to a collector of the second transistor; c. resistive means connecting the base of the first transistor to a base of the second transistor; d. means connecting the base of the second transistor to a collector of the first transistor, said means comprising capacitive means and resistive means connected in series; e. a positive power-source terminal and a negative power-source terminal, said power-source terminals being adapted to connect to a direct-current electrical power source; f. conductive means having substantially no resistance connecting the positive power-source terminal to an emitter of the PNP transistor; g. conductive means having substantially no resistance connecting the negative power-source terminal to an emitter of the NPN transistor; and h. a first lamp terminal connected to the collector of the first transistor and a second lamp terminal connected to the emitter of the second transistor, said lamp terminals being adapted to connect to an electric lamp.
Claim 3
Dependent Claim
20 words
The electronic flasher circuit of claim 1 further comprising an electric lamp connected between the first and second lamp terminals.
Claim 4
Dependent Claim
48 words
The electronic flasher circuit of claim 1 further comprising electric-battery means having a positive terminal and a negative terminal, the positive terminal of the electric-battery means being connected to the positive power-source terminal and the negative terminal of the electric-battery means being connected to the negative power-source terminal.
Claim 5
Dependent Claim
31 words
The electronic flasher circuit of claim 3 wherein the electric-battery means comprises two Leclanche dry cells connected in series to form a power source with a voltage of about three volts.
Claim 6
Dependent Claim
206 words
An electronic flasher circuit consisting essentially of a. a first transistor and a second transistor, one transistor being a PNP transistor and the other being an NPN transistor; b. conductive means having substantially no resistance connecting a base of the first transistor to a collector of the second transistor; c. resistive means connecting the base of the first transistor to a base of the second transistor; d. means connecting the base of the second transistor to a collector of the first transistor, said means comprising capacitive means and resistive means connected in series; e. a positive power-source terminal and a negative power-source terminal, said power-source terminals being adapted to connect to a direct-current electrical power source; f. conductive means having substantially no resistance connecting the positive power-source terminal to an emitter of the PNP transistor; g. conductive means having substantially no resistance connecting the negative power-source terminal to an emitter of the NPN transistor; h. a first lamp terminal connected to the collector of the first transistor and a second lamp terminal connected to the emitter of the second transistor, said lamp terminals being adapted to connect to an electric lamp; and i. a switch connected to the circuit for activating and deactivating the flasher circuit.
Claim 7
Dependent Claim
206 words
An electronic flasher circuit consisting essentially of a. a first transistor and a second transistor, one transistor being a PNP transistor and the other being an NPN transistor; b. conductive means having substantially no resistance connecting a base of the first transistor to a collector of the second transistor; c. resistive means connecting the base of the first transistor to a base of the second transistor; d. means connecting the base of the second transistor to a collector of the first transistor, said means comprising capacitive means and resistive means connected in series; e. a positive power-source terminal and a negative power-source terminal, said power-source terminals being adapted to connect to a direct-current electrical power source; f. conductive means having substantially no resistance connecting the positive power-source terminal to an emitter of the PNP transistor; g. conductive means having substantially no resistance connecting the negative power-source terminal to an emitter of the NPN transistor; h. a first lamp terminal connected to the collector of the first transistor and a second lamp terminal connected to the emitter of the second transistor, said lamp terminals being adapted to connect to an electric lamp; and i. a switch connected to the circuit for activating and deactivating the flasher circuit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |