Abstract: A battery charger device characterized by a pair of cigarette lighter plugs having their negative contacts coupled together by a conductor and having their positive contacts coupled together by a self-resetting circuit breaker. In use, one of the plugs is inserted into the cigarette lighter socket of a car having a discharged battery and the other plug is inserted into the cigarette lighter socket of another car having a good battery. If the discharged battery starts to draw current that is greater than a predetermined level the current flow is regulated by a rapid cycling on and off of the circuit breaker. When the current drawn by the discharged battery is less than the predetermined level the circuit breaker conducts current between the two batteries with only insignificant IR loss.

Abstract: A drive motor intermittently energized through a battery powered circuit drives a flywheel and a generator at speeds lower than that of the drive motor through a reduction gear assembly. The output voltage of the generator is sensed to control cyclic energization of the drive motor and influence the charge condition of the battery by the generator.

Abstract: A power supply system includes three sets of batteries for supplying direct current to a load. Three sets of switches connect mutually respective sets of batteries to the load. A controller operates the switching means so that at any time at least two of the sets of batteries are connected in parallel to the load. The controller alternates each set of switches in open and closed positions with the switches being operated in a predetermined, cyclic manner, so that during the cycle, each of the sets of batteries provides current to the load for a portion of the cycle and is disconnected from the load for the other portion of the cycle. Utilizing the sets of batteries in pairs so that each set of batteries provides only about half the current requirement and of repeatedly disconnecting each set of batteries for a short period of time while the other two sets of batteries supply the current which maximizes the life and performance of the batteries.

Abstract: Analytical devices such as chromatographs are disclosed wherein an intrinsically safe source of electrical energy is used to heat analytical elements of the devices, and optionally to power other circuits of the device.

Abstract: A main and an auxiliary energy supply device supply energy to a load normally and during disturbances of the main supply respectively while, for bridging brief disturbances in the load supply, for example naturally brief disturbances or during the short time when a disturbance has begun and the auxiliary supply has not yet come into operation, there is provided an energy store which can receive and store energy from the main supply and make this stored energy quickly available to the load. A control logic system controls the main and auxiliary supply devices and the storage means to ensure substantially constant energy supply to the load. The disturbances in question may comprise voltage rises or reductions and/or waveform distortions for example.

Abstract: First and second batteries each connected in parallel with a load and a battery isolator connected between the first battery and the second battery and the load including a series pass transistor connected in series with the first battery and the load and circuitry for comparing the voltage across the load to the voltage across the first battery and turning off the series pass transistor when the voltage of the first battery drops below the voltage at the load plus a predetermined offset voltage, which offset voltage is developed by the battery isolator. The battery isolator operates like a diode isolation circuit having a near perfect diode therein.

Abstract: A first low voltage power supply having silicon controlled rectifier regulation in the primary of the power transformer, capable of supplying very high direct current, and a second well regulated feedback power supply providing a fixed current in reverse polarity are connected in parallel across a load. The first power supply is feedback controlled to maintain constant current sinking in the second power supply. The second power supply is programmed to regulate the load current or voltage, to provide fine regulation at the load, and to reduce ripple voltage at the load.

Abstract: An indefinite number of batteries is connected in parallel to provide current to share a load. Each individual battery current is compared to an average value to regulate each battery controller so that each battery supplies its share of the current.