Importance

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Abstract

A motor vehicle powered by a DC motor has a pedal which is depressed by the driver to increase speed by actuating a tapping switch which has two sets of moving contacts cooperating with stationary contacts to progressively connect with the motor batteries from one or the other end of a bank of series connected batteries. An alternate action relay connected between said motor and the switch determines which of the two sets is connected in circuit with the motor. The relay has two positions to alternately connect one or the other of the tapping switch contact sets in circuit with said motor. A main solenoid switch is connected in series with the relay and the tapping switch. When the pedal is depressed, a foot switch operated by the pedal is operative to close a circuit enabling energization of the alternate action relay and the main solenoid switch. A microprocessor controls operation of the relay and the main solenoid. When the pedal is released, the foot switch opens the enabling circuit and provides a signal to the microprocessor to restart the microprocessor program. The program including a register which is incremented with each passage of the logic responds to the incremented count in the register to energize the relay on alternate counts.

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First Claim