2-wire push button station control system for a traffic light controlled intersection

  • US 7,145,476 B2
  • Filed: 08/05/2004
  • Issued: 12/05/2006
  • Est. Priority Date: 08/05/2004
  • Status: Active Grant
First Claim
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1. A control system by which vibro-tactile messages are provided to alert pedestrians when to cross a traffic light controlled intersection, said control system comprising:

  • at least one push button station located at the traffic light controlled intersection to be crossed by pedestrians, said push button station including a push button head that is depressed by the pedestrians and message generating means adapted to cause said push button head to vibrate to provide a tactile indication to a visually impaired pedestrian when to cross the intersection; and

    a control unit that is responsive to the depression of the push button head of said push button station to transmit to the push button station both power and digital data signals over a single pair of wires by which to power and control the operation of said message generating means.

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