Apparatus for communicating utility usage-related information from a utility usage location to a utility usage registering device

  • US 5,617,084 A
  • Filed: 10/24/1995
  • Issued: 04/01/1997
  • Est. Priority Date: 09/10/1993
  • Status: Expired due to Term
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First Claim
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1. An apparatus for communicating utility usage information at a utility usage location to a utility usage registering device comprising first means adapted to be located at a utility usage location providing a first signal indicative of utility usage information, transmitter means responsive to said first signal for periodically transmitting at a pseudo-random transmission interval, a second signal which is indicative of the utility usage information, receiver means adapted to be located remote from said utility usage location for receiving said second signal, and a utility usage registering device associated with said receiver means for storing the information in said second signal which is indicative of the utility usage information, said transmitter means including a temperature compensated crystal oscillator for generating said second signal at an accurate, stable frequency, and further including temperature sensitive means for generating a temperature signal indicative of the temperature of said crystal oscillator, microprocessor means for storing therein data indicative of a plurality of temperature compensated signals, one of which is to be directed to said crystal oscillator to enable said crystal oscillator to generate said second signal at an accurately predetermined frequency, said microprocessor means receiving said temperature signal and generating a temperature compensated signal to be directed to said crystal oscillator from said data in said microprocessor means.

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