Variable speed motor system utilizing controlled rectifiers

Claim 1

A CONTROL SYSTEM FOR A BATTERY-SUPPLIED ELECTRIC MOTOR COMPRISING A TRANSISTOR PULSE GENERATOR HAVING A MANUALLY VARIABLE RESISTANCE CONTROLLING THE PULSE GENERATION FREQUENCY, A DELAY CIRCUIT WITH TRANSISTORS, A MAIN CIRCUIT INCLUDING A BATTERY, A VARIABLE SPEED MOTOR, A DIODE CONNECTED IN PARALLEL THEREWITH, A DIODE IN SERIES THEREWITH, AND A FIRST CONTROLLED RECTIFIER; A PARALLEL PATH ACROSS SAID CONTROLLED RECTIFIER COMPRISING A CAPACITOR AND AN INDUCTOR, AND A SECOND CONTROLLED RECTIFIER CONNECTED ACROSS THE INDUCTOR, AN INTER-CONNECTION BETWEEN SAID PULSE GENERATOR AND FIRST CONTROLLED RECTIFIER TO CONTROL THE PULSE FREQUENCY THEREOF, AND AN INTER-CONNECTION BETWEEN SAID DELAY CIRCUIT, AND SAID SECOND CONTROLLED RECTIFIER TO DETERMINE THE PULSE LENGTH.