Single phase motor reversing starter

Claim 1

A solid state reversing starter for a capacitor run single phase alternating current motor having a rotor, and three alternating current input terminals connecting a capacitor and two field windings in a delta arrangement, so that when single phase alternating current power from a common source is applied to two of such terminals directly across one winding, the rotor rotates in a given direction, and when such single phase alternating current power is applied directly to the two terminals across the other winding, the rotor rotates in a direction which is reverse with respect to said given direction; said solid state reversing starter including a pair of triacs consisting of bidirectional triode thyristors, one of said triacs for each winding, connected directly acorss the terminals of the capacitor in parallel circuit relation with each other, and to one circuit of the single phase alternating current source; the other circuit of such alternating current source being connected directly to the common terminal of such field windings; whereby when a selected one of said triacs is fired, the motor is energized by such single phase alternating current source to operate the rotor in one direction, and when the other triac is fired, the motor is energized by such single phase alternating current source to operate the rotor in the reverse direction; and a transistorized triac gating control circuit for selectively firing each of said triacs, consisting of two transistors, one for each triac, having direct current input signal circuits containing a common lead and individual leads connected by equal resistors, and each of said transistors having a corresponding triac firing output circuit connected to a corresponding triac and said common lead; whereby when a selected rotor forward Or reverse direct current signal is applied to the corresponding transistor input circuit, the output thereof fires the corresponding triac, applying single phase alternating current power to the corresponding winding of the motor, which results in rotation of the motor in the desired direction.