Panic exit device having an exit-delaying mechanism

Abstract From the Canadian patent

The device incorporates a time-delayed mechanism which obstructs movement of a latchbolt from its latched position to an unlatched position. Linkage coupled to the latchbolt and manually acutated (by a push pad, or the like), includes an arm which normally pivots with the manual actuation of the linkage. An initial, limited movement of the linkage activates a switch, and the latter activates a time delay circuit component. The latter component, following a specified time delay interrupts power to a solenoid. The solenoid normally powered, has a bar inductively movable therein with a rod joined thereto for coincident movement. An end of the rod carries a roller which intrudes into the …