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Switch and lock activating system and method

  • US 4,354,189 A
  • Filed: 02/15/1980
  • Issued: 10/12/1982
  • Est. Priority Date: 11/09/1977
  • Status: Expired due to Term
First Claim
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1. An electrically operated lock system comprising in combination:

  • first means for locking and unlocking an access gate,second means for operating said first means to cause said first means to unlock said gate,said second means including electrically controllable means and a short wave pick-up operatively connected to said electrically controllable means,third means including a portable short wave code generating and transmitting means adapted to be carried by a person seeking to open said access gate,fourth means connected to said pick-up of said second means and operable for electrically detecting short wave codes generated by said third means, said fourth means being operable to activate said second means to control the operation of said first means,said first, second and fourth means being supported on a common support, andsaid third means being automatically operable when carried to a given range of said fourth means to generate a short wave code receivable by said pick-up and detectable by said fourth means for causing said fourth means to generate a control signal for controlling said second means to unlock said gate.

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