DIGITAL TIMEPIECE HAVING MEANS FOR SELECTIVELY OR SIMULTANEOUSLY LAYING BOTH CONVENTIONAL TIME AND REMAINING TIME FUNCTIONS

摘要

The present invention relates to a digital timepiece having means for selectively or simultaneously displaying both the conventional elapsed time function and a remaining time function which the timepiece counts-down to zero from a pre-set value. Basically, the timepiece comprises a pulse-generator such as a quartz oscillator generating time-standard pulses and dividing means for generating pulses at spaced time intervals of seconds or fractions thereof. Two sets of counters then operate simultaneously to respectively add the generated pulses to give accumulated seconds, or fractions of seconds, minutes and hours which are displayed in digital fashion as a conventional elapsed time display, and to substract the generated pulses from a pre-set time value to give a remaining time display. Means are provided for either alternatively and selectively displaying the elapsed time or remaining time, or simultaneously displaying both functions. Preferably an audible alarm is provided to audibly indicate when the remaining time indicated is at zero.