Security system using modular timers

Details Security system using modular timers Security system using modular timers

G - Physics

04

G

G04G 99/00 (2010.01) G04G 15/00 (2006.01) G08B 15/00 (2006.01) H01H 43/00 (2006.01)

Patent

CA 2359526

Electrical timer modules that interact with one another so as to effect random operation of a plurality of electrical devices, creating the appearance that the devices are not operated automatically. The timer modules include circuitry that allows them to wake up from a sleep state or mode within a random time interval. Upon waking form the sleep state or mode, each modular timer initially senses for the presence of a transmitted signal. Upon receipt of a transmitted signal each module returns to its sleep state or mode. If no transmitted signal is received, the first timer module that wakes up transmits a signal to the other modules and activates an electrical device connected thereto.

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