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Home security and garage door operator system

  • US 4,433,274 A
  • Filed: 07/27/1981
  • Issued: 02/21/1984
  • Est. Priority Date: 04/14/1980
  • Status: Expired due to Fees
First Claim
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1. In a garage door operator of the type having a door drive motor, an overload switch for the motor, an integrated security alarm system, and a power supply normally connected to both the motor and the alarm system, the improvement comprising:

  • circuit means interconnecting the power supply, the motor, the overload switch and the alarm system including detector means for monitoring the condition of the overload switch and providing a first logical signal level to the motor and to the alarm system to maintain normal operation thereof but responsive to the opening of said overload switch to provide a second logical signal level which selectively disables only the motor.

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