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Digital time signalling device

  • US 4,131,855 A
  • Filed: 08/03/1977
  • Issued: 12/26/1978
  • Est. Priority Date: 08/03/1977
  • Status: Expired due to Term
First Claim
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1. A digital time signalling device comprising a pulse generating circuit for generating clock pulses of one Hertz frequency, a first counter for counting said clock pulses to produce output pulses at intervals of sixty (60) counts, a second counter for counting the output pulses of said first counter to produce a coded count output every count and also produce output pulses at intervals of sixty (60) counts and being reset in response to said output pulses, a third counter for counting the output pulses of said second counter to produce a coded count output every count and being reset at intervals of twenty-four (24) counts, a time setting device for storing a time to be signalled and producing a coded output representing said time, a coincidence circuit for comparing the coded count outputs of said second and third counters with the coded output of said time setting device for all bits at the same time and producing a coincidence signal when coincidence is obtained therebetween, and a load driving device energized by said coincidence signal to drive a utilization device.

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