Digital time signalling device
First Claim
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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Abstract
A digital time signalling device which includes an oscillator and frequency divider producing clock pulses at a given frequency, a counter for counting clock pulses to produce minute pulses, a counter for counting minute pulses to produce hour pulses, an hour counter for counting hours, a time setting unit and a coincidence circuit for comparing the outputs of the hour and minute counters with the output of the time setting unit to produce a coincidence signal activating a utilization device.
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Citations
6 Claims
- 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.
Specification
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- Resources
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Current AssigneeTOYO Jihoki Manufacturing Company Limited
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Original AssigneeTOYO Jihoki Manufacturing Company Limited
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InventorsHamagawa, Hiroshi
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Primary Examiner(s)Heyman, John S.
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Application NumberUS05/821,482Time in Patent Office510 DaysField of Search328/129, 328/130, 328/37, 328/48, 307/293, 58/85.5US Class Current327/392CPC Class CodesG04G 13/02 at preselected times, e.g. ...
