Communications: electrical – Systems – Periodic or flashing
Patent
1995-03-21
1997-08-19
Hofsass, Jeffery
Communications: electrical
Systems
Periodic or flashing
340472, 340474, 315292, 315294, G08B 500
Patent
active
056592876
ABSTRACT:
There is provided a synchronous strobe system for synchronizing a flash rate of a plurality of strobe devices positioned along a loop of an alarm system. After the alarm system is energized and activated, a control panel of the synchronous strobe system will transmit a synchronization signal or pulse along the loop at periodic time intervals. Each synchronization signal is detected by a electronic circuit of the strobe device, including a microcontroller. Upon detection of each synchronization signal, the microcontroller determines whether to operate the strobe device in Sync required mode or Sync not required mode. For Sync required mode, the synchronization signal must be detected by the strobe device to flash a strobe light of the strobe device. Otherwise, the microcontroller waits for the next synchronization signal before attempting to flash the strobe light. For the Sync not required mode, the strobe light is flashed at an independent flash rate until the synchronization signal is detected and used to realign the flash rate. By flashing the strobe devices in response to the synchronizing signal, the composite flash rate of the strobes can be controlled and synchronized in an efficient manner to avert a composite flash rate that could trigger a convulsive reaction, such as an epileptic seizure.
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Donati Richard Joseph
Zeigler, III John Finley
General Signal Corporation
Hofsass Jeffery
Woods Davetta
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