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Automatically engaged traffic sign

  • US 8,138,948 B1
  • Filed: 09/25/2009
  • Issued: 03/20/2012
  • Est. Priority Date: 12/11/2008
  • Status: Expired due to Fees
First Claim
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1. An automatically engaged traffic sign comprisinga traffic sign;

  • a curtain to conceal the traffic sign;

    a spring-loaded roller for rolling up the curtain when the traffic sign is to be displayed;

    a cable attached to the curtain;

    a pulley for winding the cable to draw the curtain into a closed position;

    a motor attached to said pulley;

    a cam with at least one finger that is rigidly connected to the pulley;

    a latch disposed to engage the finger on the cam when the curtain is in a closed position;

    an actuating mechanism to disengage the latch when a power failure is detected.

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