Abstract: An alarm system for sensing entry through premise doors and windows, including primary and secondary circuits joined by a transformer. The primary circuit has an alarm including a siren and floodlight plus a time delay relay (with automatic reset) for activating the alarm for preset periods. A siren delay tube permits siren on-off operation in preset cycles. The secondary contains a plurality of automatic resetting door and window switches. A solenoid operated trigger switch has switch contacts wired to energize the time delay relay whereby the trigger switch solenoid is wired in the secondary for actuation by any door or window switch. A rocker switch in the primary selectively energizes the floodlight without activating the siren and selectively deactivates primary power to the transformer in coaction with time delay relay when the siren and floodlight are activated thus deactivating secondary power to the doors and windows.

Abstract: An automatically resetting alarm switch includes a casing which may be mounted into a stationary frame of a window or other closure. The casing has a side opening through which a contact head protrudes. The contact head is connected to an internally located trip lever which, in turn, is in contact with a microswitch. A solenoid having a plunger also is disposed within the casing. The plunger is capable of shifting the trip lever. The contact head is coupled frictionally to a sliding surface of the closure. Upon movement of the closure, the contact head is moved which causes the microswitch to trigger a remotely located alarm device. The solenoid also is activated and the resultant movement of the plunger resets the contact head in readiness for sending another alarm signal.