In-line solid state time delay device

摘要

A two-terminal in-line time delay device incorporating upon the initiation of in-put power into the device a pulsing component which, after a selected time delay, provides a gating pulse for a line-to-load series connected SCR. As the SCR is switched on, a connected transistor is turned on to provide a continuous gating current for the SCR which allows load-to-line current flow.