×

Burglar alarm with a multi-phase circuit, fail-safe control circuit, automatic rearm circuit and two-step disarming circuit

  • US 4,706,064 A
  • Filed: 08/25/1986
  • Issued: 11/10/1987
  • Est. Priority Date: 08/25/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. A burglar alarm system for an automotive vehicle having doors and an ignition switch:

  • alarm means operative when armed to sound an alarm signal in response to the opening of a door of said vehicle and being inoperative to sound said alarm when disarmed, two step disarming means for temporarily disarming said alarm means in response to receiving a first external signal and for disarming said alarm means in response to said first external signal followed by the operation of the ignition switch of said vehicle within a predetermined time interval after receiving said external signal and to automatically rearm said alarm means after said predetermined interval if said ignition is not operated within said predetermined interval, said alarm means sounding a short chirp signal in response to the closure of the last door of said vehicle while said alarm means is temporarily disarmed in response to said first external signal.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×