SWITCHING DEVICE Russian patent published in 2001 - IPC

FIELD: automatic control; switching over metering devices, push-button controlled fuel dispensing columns, and the like. SUBSTANCE: device designed for programmable switching of power components of automatic-control systems such as electromagnets, valves, etc. , where time delay and self-locking provision is required has power energy metering circuit, time-setting delay circuit, ON-operation preparing and protective circuit, ON-operation and self-locking circuit, and circuit for turning on flowrate reducing valve. It also has optical-lycoupled isolator ensuring reliable insulation of actuating power and control circuits. EFFECT: enhanced speed of fuel dispensing, facilitated connection to control computer, enhanced reliability and service life of device. 4 cl, 2 dwg