BigPatents India

An electrical circuit for a switch having a lockout feature is described. The circuit permits both a primary operator and an auxiliary operator to operate a bi- directional motor (30) by activating separate low-current switches (SW1, SW2, SW3, SW4). The circuitry enables the primary operator to disable the auxiliary operator's ability to operate the motor by activating a lockout switch (LID). With the lockout switch activated, the primary operator can operate the motor without interference from the auxiliary operator. High-current power switches (50, 52), activated via logic circuitry (70, 90) rather than by the operators, are used to complete a power circuit for energizing the motor.