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Infra-red remote controlled command system for a communications receiver

  • US 4,091,272 A
  • Filed: 07/07/1976
  • Issued: 05/23/1978
  • Est. Priority Date: 07/10/1975
  • Status: Expired due to Term
First Claim
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1. In a remote command system for regulating a prescribed function of at least one communication receiver in accordance with one of a plurality of selected manual commands, command sending means including an infra-red transmitting element, resettable command reproduction means disposed at the receiver and including an infra-red detecting element, first frequency controlled oscillator means associated with the command sending means for generating a first pulse sequence at a first rate, first dividing means coupled to the first oscillator means for generating a second pulse sequence at a second rate corresponding to a sub-multiple of the first rate, first resettable means responsive to the selected manual command signal for encoding the pulse interval of the second pulse sequence to form a third pulse sequence, first means responsive to the output of the first encoding means for modulating the first pulse sequence to form a fourth pulse sequence, means for applying the fourth pulse sequence to the transmitting element for radiation to the detecting element of the command reproducing means, second frequency controlled oscillator means associated with the reproducing means for generating a fifth pulse sequence identical to the first pulse sequence at the first rate, second dividing means coupled to the second oscillator means and normally responsive to the detected fourth pulse sequence for generating a sixth pulse sequence identical to the second pulse sequence at the second rate upon the detection of the first pulse of the fourth pulse sequence, and means including checking means responsive to the detected fourth pulse sequence for encoding the repetition interval of the sixth pulse sequence to yield a seventh pulse sequence decodable to reproduce the selected command.

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