Discharge indicating means for a storage battery

Claim 1

A discharge indicating means for a storage battery that has first and second terminals, said circuit comprising a choke, a first transistor that has a base and a collector-emitter circuit, first means for connecting said choke and said first transistor in series with said storage battery, means for connecting a load to be energized to said storage battery, an indicating device, second circut means connecting said indicating device in parallel with the collector-emitter circuit of said first transistor, a second transistor that has a base and a collector emitter circuit, third circuit means connecting the connector-emitter circuit of said second transistor in circuit between the base of the first transistor and the first terminal of said battery, a first capacitor, fourth circuit means connecting said first capacitor in circuit between said choke and the base of said second transistor, a switching device, fifth circuit means connecting said switching device in circuit between the first terminal of said storage battery and said first circuits means connecting said choke and said first transistor in series with said storage battery, said switching device being arranged to establish current flow through said load and said choke, a third transistor that has a base and a collector-emitter circuit, and sixth circuit means connecting said third transistor in circuit between said second terminal of said battery said second transistor for applying a signal to said second transistor when the voltage of said battery falls below a predetermined value to cause oscillating operation of said first transistor and energization of siad indicating device.