Robert Boschgmbh

Dennis Petricoin

Dennis M Caler

Steven Markham

Craig A Hayden

Scott T Castle

Paul DeLozier

Steven A Markham

A method of operating a security system includes sensing a security breach, and providing an indication to a user that an alarm signal will be issued in response to the sensing of the security breach. The indication perceptibly changes with time.

Method and apparatus for providing graduated annunciation of an impending alarm in a security system

A wrench for tamper switch installation for use with a tamper switch arrangement including an enclosure containing a tamper switch assembly having a mounting rail for assembling the tamper switch assembly to a security system enclosure. The wrench may be capable of holding two separate nuts and have cooperating mating structure to slidably mate with the mounting rail of the tamper switch arrangement. The nuts may be frictionally-fitted into the wrench, after which the wrench is slidably moved onto the mounting rail until the nuts line up with two throughbores in the mounting rail. Two screws or bolts are then inserted through a surface of the security system enclosure and traverse the throughbores in the mounting rail. The screws or bolts then threadably engage the two nuts disposed within the wrench and are threaded therethrough via rotation with a suitable instrument, e.g., a screwdriver, located outside of the security system enclosure. The wrench prevents the two nuts from turning while an installer installs the two screws or bolts from outside the security system enclosure.

Wrench for tamper switch installation

A method of operating a security system includes providing a plurality of sensors, and detecting at least one event with the sensors. A decision whether to initiate an alarm signal is dependent upon the detecting by each of the sensors, which of the sensors has detected the at least one event, and what nonzero number of times a first of the sensors has detected the at least one event.

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Hemlock, NY, United States of America

Dennis Petricoin