Horology: time measuring systems or devices – Time interval – Electrical or electromechanical
Patent
1982-12-27
1985-07-09
Roskoski, Bernard
Horology: time measuring systems or devices
Time interval
Electrical or electromechanical
368108, 368 89, 368 28, G04F 800
Patent
active
045279063
ABSTRACT:
Disclosed is a digital menstrual cycle indicator for indicating the fertile portion of a woman's menstrual cycle. A standard watch module that can be continuously operated in a certain adjust mode, has a multidigit display and a clock pulse source, so the module serves as an inexpensive display and clock pulse source. A divider circuit is used to divide the output of the clock pulse source and increment the multidigit display by "1" once each twenty-four hours, after the module has been forced into the adjust mode. A hidden switch is used to force the module into the adjust mode, clear the divider and clear the display. Failsafe circuits are included to prevent the erroneous display of data due to a weak battery or an interruption of the power or ground buses.
REFERENCES:
patent: 4240153 (1980-12-01), Merritt
patent: 4244126 (1981-01-01), James
patent: 4316276 (1982-02-01), Koehler et al.
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