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US 6,856,242 B2Granted
Automatic siren silencing device for false alarms
AssigneeSpiral Technologies Ltd.
InventorRobert J. Trent
Life of this patent
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AssigneeSpiral Technologies Ltd.
InventorRobert J. Trent
Estimating the term…
An automatic siren silencing device for false alarms, for use in an alarm system having a siren driver which powers a siren. A microcomputer monitors pulse signal characteristics of the siren driver, including duration of pulses and number of pulses, and compares these characteristics with predetermined pulse signal characteristics stored in a memory. A relay coil is energized by the microcomputer, controlling a relay switch which disconnects the siren from the siren driver when the pulse signal characteristics are indicative of a false alarm thereby silencing the siren. A user means is provided to adjust the predetermined pulse signal characteristics. Power to the microcomputer is provided by a capacitor, charged by the signal of the siren driver, whereby no battery or dedicated external power supply input is required. Indicator lights and a piezo element inform a user of siren silencing, and indicate the types of false alarms detected.
An automatic siren silencing device for false alarms, for use in an alarm system having a siren driver and a siren, said siren driver powering said siren, comprising:
A siren disrupter for false alarms, for use in an alarm system having a siren driver and a siren, comprising:
A method of automatically interrupting power from a siren driver to a siren in an alarm system in the event of a false alarm, the method comprising the steps of:
Dependencies are inferred from the claim text.