초록 ▼

A quartz oscillator-driven time-measuring circuit normally and substantially continuously updates the time display of a clock. A control circuit independent of the time-measuring circuit receives the standard time interval pulse signal broadcast by WWV/WWVH which includes longer pulses signaling eac

A quartz oscillator-driven time-measuring circuit normally and substantially continuously updates the time display of a clock. A control circuit independent of the time-measuring circuit receives the standard time interval pulse signal broadcast by WWV/WWVH which includes longer pulses signaling each minute and shorter pulses signaling the seconds between minutes. The control circuit includes mechanism activated by the longer minute pulses to set the clock display intermittently, i.e. once each minute. Between minutes, the time-measuring circuit updates the clock display.

대표청구항 ▼

The process of indicating the time on an electronic digital display of an electrically actuated clock, which process comprises receiving a WWV/WWVH radio-transmitted, standard time interval signal having short seconds pulses and longer minutes pulses, detecting the reception of the longer minutes pu

The process of indicating the time on an electronic digital display of an electrically actuated clock, which process comprises receiving a WWV/WWVH radio-transmitted, standard time interval signal having short seconds pulses and longer minutes pulses, detecting the reception of the longer minutes pulses, automatically and immediately setting the clock display upon receipt of a second pulse following detecting of a minute pulse but before the next minute pulse, and automatically updating the display of the clock by a time-measuring circuit independent of the radio-transmitted signal during the period that such radio-transmitted signal is not being used to set the display of the clock.