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US 4,068,149 AGranted
Flasher circuit with low power drain
AssigneeArthur M. Master, Jr.
InventorDavid G. Wuchinich
Life of this patent
Estimating the term…
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.
Claims5
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.
6 more elements
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.
7 more elements
Dependencies are inferred from the claim text.