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US 4,538,924 AGranted
Clock device
AssigneeCanon Kabushiki Kaisha
InventorShinichi Nakata
Life of this patent
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Abstract
A clock device having a clock circuit to produce time data outputs of hour, minute and second, and an operational circuit to perform predetermined operations based on the time data outputs from the clock device, wherein the changing information for "day", "hour", and "minute" in the data outputs is forwarded to the operational circuit prior to change in the real time.
Claims10
A clock device, comprising:
- means for generating digital signals representative of running time data;
- means for entering fixed time data into said device for indicating a fixed time;
- means for determining a predetermined period of time in advance of the fixed time when the running time data and fixed time data will actually coincide and for generating a coincidence signal after the predetermined period of time has elapsed in response to the advance determination of coincidence;
- and
- means responsive to said coincidence signal for generating an alarm at the fixed time.
2 more elements
A clock device, comprising:
- timekeeping means for providing running time data;
- memory means for storing an alarm time;
- and
- signalling means for generating a signal indicating that the alarm time will arrive after the lapse of a predetermined period of time by beginning a comparing operation to compar the running time data and the alarm time in advance of the alarm time by the predetermined period of time and for outputting the signal after the predetermined period of time has elapsed from the beginning of the comparing operation.
1 more element
Dependencies are inferred from the claim text.