G04GELECTRONIC TIME-PIECESThis subclass covers: electronic time-pieces with no moving parts;electronic circuitry for producing timing pulses irrespective of the nature of the time indicating means utilised.This subclass does not cover electronic time-pieces with moving parts, which are covered by subclass G04C.In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. G04G3/00 G04G3/00Producing timing pulses driving circuits for stepping motors G04C3/14; producing preselected time intervals for use as timing standards G04F5/00; pulse technique in general H03K; control, synchronisation, or stabilisation of generators in general H03L G04G3/02Circuits for deriving low frequency timing pulses from pulses of higher frequency pulse frequency dividers in general H03K23/00 - H03K29/00 G04G3/022the desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses in general G06F7/68 G04G3/025by storing time-date which are periodically investigated and modified accordingly, e.g. by using cyclic shift-registers G04G3/027by combining pulse-trains of different frequencies, e.g. obtained from two independent oscillators or from a common oscillator by means of different frequency dividing ratios sychronisation of electric time pieces G04G7/00, G04C11/00 G04G3/04Temperature-compensating arrangements G04G5/00Setting, i.e. correcting or changing, the time-indication radio-controlled time-pieces G04R G04G5/002brought into action by radio G04G5/005Debouncing circuits G04G5/007by using a separate register into which the entire correct setting is introduced, which is thereafter transferred to the time counters G04G5/02by temporarily changing the number of pulses per unit time, e.g. quick-feed method G04G5/022quick-feed method G04G5/025the time-counters first being reset to zero G04G5/027by adding or suppressing individual pulses, e.g. for step-motor G04G5/04by setting each of the displayed values, e.g. date, hour, independently G04G5/041Correction of the minutes counter in function of the seconds' counter position at zero adjustment of the latter G04G5/043using commutating devices for selecting the value, e.g. hours, minutes, seconds, to be corrected G04G5/045using a sequential electronic commutator G04G5/046by using a separate register into which the correct setting of one of the counters is introduced which is thereafter transferred to the selected time-counter to be reset G04G5/048by using a separate register into which the correct setting of the selected time-counter is introduced which is thereafter transferred to the time-counter to be reset G04G7/00Synchronisation radio-controlled time-pieces G04R G04G7/005provided with arrangements to prevent synchronisation by interfering signals G04G7/023 takes precedence G04G7/02by radio G04G7/023provided with arrangements to prevent synchronisation by interfering signals G04G7/026the time-piece preparing itself on set times on the reception of the synchronising signal G04G9/00Visual time or date indication means G04G9/0005Transmission of control signals G04G9/0011using coded signals synchronisation combined with automatic setting at regular intervals, e.g. by coded signals G04G7/00 G04G9/0017in which the light emitting display elements may be activated at will or are controlled in accordance with the ambient light G04G9/0023by light valves in general G04G9/06, G04G9/12 takes precedence; electro-, magneto- or acousto-optic devices in general G02F1/00 G04G9/0029Details G04G9/0035constructional G04G9/0041Illumination devices G04G9/0047electrical, e.g. selection or application of the operating voltage G04G9/0052using means to adjust the display in accordance with the ambient light, e.g. switching or controlling a supplementary light source G04G9/0058using a cathode ray tube as display device displaying supplementary informative, e.g. time on TV screen H04N5/445 G04G9/0064in which functions not related to time can be displayed digital output to display devices of digital computers G06F3/14 G04G9/007combined with a calculator or computing means G04G9/0076in which the time in another time-zone or in another city can be displayed at will G04G9/0082by building-up characters using a combination of indicating elements and by selecting desired characters out of a number of characters or by selecting indicating elements the positions of which represents the time, i.e. combinations of G04G9/02 and G04G9/08 G04G9/0088by controlling light sources, e.g. electroluminescent diodes G04G9/0094using light valves, e.g. liquid crystals G04G9/02by selecting desired characters out of a number of characters or by selecting indicating elements the position of which represent the time, e.g. by using multiplexing techniques G04G9/0082 takes precedence G04G9/022using multiplexing techniques G04G9/025provided with date indication G04G9/027provided with means for displaying at will a time indication or a date or a part thereof G04G9/04by controlling light sources, e.g. electroluminescent diodes G04G9/0058 takes precedence G04G9/042using multiplexing techniques G04G9/045provided with date indication G04G9/047provided with means for displaying at will a time indication or a date or a part thereof G04G9/06using light valves, e.g. liquid crystals G04G9/062using multiplexing techniques G04G9/065using a drop of liquid suspended by capillary forces and moved by an electric field G04G9/067using mechano-optical means G04G9/08by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques G04G9/0082 takes precedence G04G9/082using multiplexing techniques G04G9/085provided with date indication G04G9/087provided with means for displaying at will a time indication or a date or a part thereof G04G9/10by controlling light sources, e.g. electroluminescent diodes G04G9/0058 takes precedence G04G9/102using multiplexing techniques G04G9/105provided with date indication G04G9/107provided with means for displaying at will a time indication or a date or a part thereof G04G9/12using light valves, e.g. liquid crystals G04G9/122using multiplexing techniques G04G9/124provided with date indication G04G9/126provided with means for displaying at will a time indication or a date or a part thereof G04G9/128using mechano-optical means G04G11/00Producing optical signals at preselected times G04G13/00Producing acoustic time signals G04G13/02at preselected times, e.g. alarm clocks G04G13/021Details G04G13/023Adjusting the duration or amplitude of signals G04G13/025acting only at one preselected time G04G13/026acting at a number of different times G04G13/028combined with a radio G04G15/00Time-pieces comprising means to be operated at preselected times or after preselected time intervals G04G11/00, G04G13/00 take precedence; electronic timers G04F1/005; pulse delay circuits H03K5/13; electronic time-delay switches H03K17/28; electronic time-programme switches which automatically terminate their operation after the programme is completed H03K17/296 G04G15/003acting only at one preselected time or during one adjustable time interval G04G15/006for operating at a number of different times cigar or cigarette receptacles or boxes with means for limiting the frequency of smoking A24F15/005 G04G17/00Structural detailsHousings constructional details of radio-controlled time-pieces, e.g. antennas G04R60/00 G04G17/005Time-pieces combined with games G04G17/02Component assemblies G04G17/04Mounting of electronic components G04G17/045Mounting of the display G04G17/06Electric connectors, e.g. conductive elastomers G04G17/08Housings G04G17/083Watches distributed over several housings G04G17/086Desktop clocks G04G19/00Electric power supply circuits specially adapted for use in electronic time-pieces G04G19/02Conversion or regulation of current or voltage G04G19/04Capacitive voltage division or multiplication G04G19/06Regulation G04G19/08Arrangements for preventing voltage drop due to overloading the power supply G04G19/10Arrangements for supplying back-up power G04G19/12Arrangements for reducing power consumption during storage G04G21/00Input or output devices integrated in time-pieces G04G21/02Detectors of external physical values, e.g. temperature G04G21/025for measuring physiological data G04G21/04using radio waves radio-controlled time-pieces G04R G04G21/06using voice G04G21/08Touch switches specially adapted for time-pieces G04G99/00Subject matter not provided for in other groups of this subclass G04G99/003Pulse shaping; Amplification G04G99/006Electronic time-pieces using a microcomputer, e.g. for multi-function clocks