Reversible silicon controlled rectifier ring counter for stepper motor drive

Claim 1

A CIRCUIT FOR SEQUENTIALLY ENERGIZING FROM A POWER SOURCE IN FORWARD OR REVERSE ORDER A PLURALITY OF UTILIZATION DEVICES, COMPRISING A SILICON CONTROLLED RECTIFIER CONNECTED FROM ANODE TO CATHODE BETWEEN EACH DEVICE AND THE POWER SOURCE AND HAVING A CONTROL TERMINAL, DIODE GATING MEANS CONNECTED TO THE CONTROL TERMINALS OF THE SILICON CONTROLLED RECTIFIERS FOR SEQUENTIALLY APPLYING ENERGIZING SIGNALS THERE TO RENDER ONE OF THE SILICON CONTROLLED RECTIFIERS CONDUCTING, CAPACITORS CONNECTING THE ANODES OF THE SILICON CONTROLLED RECTIFIERS NONCONDUCTING UPON DUCTING SILICON CONTROLLED RECTIFIER NONCONDUCTING UPON THE SEQUENTIALLY ADJACENT SILICON CONTROLLED RECTIFIER BEING RENDERED CONDUCTING BY THE ENERGIZING SIGNAL, AND MEANS FOR SELECTIVELY CONNECTING FORWARD AND REVERSE STEERING SOURCES TO THE GATING MEANS TO DETERMINE THE ORDER OF ENERGIZING THE DEVICES.