WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

G04G　ELECTRONIC TIME-PIECES

G04G 3/00 Producing timing pulses (driving circuits for stepping motors G04C 3/14; producing preselected time intervals for use as timing standards G04F 5/00; pulse technique in general H03K; control, synchronisation, or stabilisation of generators in general H03L)

G04G 3/02 ・Circuits for deriving low frequency timing pulses from pulses of higher frequency (pulse frequency dividers in general H03K 23/00 to H03K 29/00)

G04G 3/022 ・・{the 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 G06F 7/68)}

G04G 3/025 ・・{by storing time-date which are periodically investigated and modified accordingly, e.g. by using cyclic shift-registers}

G04G 3/027 ・・{by 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 G04G 7/00, G04C 11/00)}

G04G 3/04 ・Temperature-compensating arrangements

G04G 5/00 Setting, i.e. correcting or changing, the time-indication (radio-controlled time-pieces G04R)

G04G 5/002 ・{brought into action by radio}

G04G 5/005 ・{Debouncing circuits}

G04G 5/007 ・{by using a separate register into which the entire correct setting is introduced, which is thereafter transferred to the time counters}

G04G 5/02 ・by temporarily changing the number of pulses per unit time, e.g. quick-feed method

G04G 5/022 ・・{quick-feed method}

G04G 5/025 ・・・{the time-counters first being reset to zero}

G04G 5/027 ・・{by adding or suppressing individual pulses, e.g. for step-motor}

G04G 5/04 ・by setting each of the displayed values, e.g. date, hour, independently

G04G 5/041 ・・{Correction of the minutes counter in function of the seconds' counter position at zero adjustment of the latter}

G04G 5/043 ・・{using commutating devices for selecting the value, e.g. hours, minutes, seconds, to be corrected}

G04G 5/045 ・・・{using a sequential electronic commutator}

G04G 5/046 ・・・・{by 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}

G04G 5/048 ・・・{by using a seperate register into which the correct setting of the selected time-counter is introduced which is thereafter transferred to the time-counter to be reset}

G04G 7/00 Synchronisation (radio-controlled time-pieces G04R)

G04G 7/005 ・{provided with arrangements to prevent synchronisation by interfering signals (G04G 7/023 takes precedence)}

G04G 7/02 ・by radio

G04G 7/023 ・・{provided with arrangements to prevent synchronisation by interfering signals}

G04G 7/026 ・・{the time-piece preparing itself on set times on the reception of the synchronising signal}

G04G 9/00 Visual time or date indication means

G04G 9/0005 ・{Transmission of control signals}

G04G 9/0011 ・・{using coded signals (synchronisation combined with automatic setting at regular intervals, e.g. by coded signals G04G 7/00)}

G04G 9/0017 ・{in which the light emitting display elements may be activated at will or are controlled in accordance with the ambient light}

G04G 9/0023 ・{by light valves in general (G04G 9/06, G04G 9/12 takes precedence; electro-, magneto- or acousto-optic devices in general G02F 1/00)}

G04G 9/0029 ・・{Details}

G04G 9/0035 ・・・{constructional}

G04G 9/0041 ・・・・{Illumination devices}

G04G 9/0047 ・・・{electrical, e.g. selection or application of the operating voltage}

G04G 9/0052 ・・・・{using means to adjust the display in accordance with the ambient light, e.g. switching or controlling a supplementary light source}

G04G 9/0058 ・{using a cathode ray tube as display device (displaying supplementary informative, e.g. time on TV screen H04N 5/445)}

G04G 9/0064 ・{in which functions not related to time can be displayed (digital output to display devices of digital computers G06F 3/14)}

G04G 9/007 ・・{combined with a calculator or computing means}

G04G 9/0076 ・{in which the time in another time-zone or in another city can be displayed at will}

G04G 9/0082 ・{by 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 G04G 9/02 and G04G 9/08}

G04G 9/0088 ・・{by controlling light sources, e.g. electroluminescent diodes}

G04G 9/0094 ・・{using light valves, e.g. liquid crystals}

G04G 9/02 ・by selecting desired character out of a number of characters or by selecting indicating elements the position of which represent the time, e.g. by using multiplexing techniques {(G04G 9/0082 takes precedence)}

G04G 9/022 ・・{using multiplexing techniques}

G04G 9/025 ・・{provided with date indication}

G04G 9/027 ・・{provided with means for displaying at will a time indication or a date or a part thereof}

G04G 9/04 ・・by controlling light sources, e.g. electroluminescent diodes {(G04G 9/0058 takes precedence)}

G04G 9/042 ・・・{using multiplexing techniques}

G04G 9/045 ・・・{provided with date indication}

G04G 9/047 ・・・{provided with means for displaying at will a time indication or a date or a part thereof}

G04G 9/06 ・・using light valves, e.g. liquid crystals

G04G 9/062 ・・・{using multiplexing techniques}

G04G 9/065 ・・・{using a drop of liquid suspended by capillary forces and moved by an electric field}

G04G 9/067 ・・・{using mechano-optical means}

G04G 9/08 ・by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques {(G04G 9/0082 takes precedence)}

G04G 9/082 ・・{using multiplexing techniques}

G04G 9/085 ・・{provided with date indication}

G04G 9/087 ・・{provided with means for displaying at will a time indication or a date or a part thereof}

G04G 9/10 ・・by controlling light sources, e.g. electroluminescent diodes {(G04G 9/0058 takes precedence)}

G04G 9/102 ・・・{using multiplexing techniques}

G04G 9/105 ・・・{provided with date indication}

G04G 9/107 ・・・{provided with means for displaying at will a time indication or a date or a part thereof}

G04G 9/12 ・・using light valves, e.g. liquid crystals

G04G 9/122 ・・・{using multiplexing techniques}

G04G 9/124 ・・・{provided with date indication}

G04G 9/126 ・・・{provided with means for displaying at will a time indication or a date or a part thereof}

G04G 9/128 ・・・{using mechano-optical means}

G04G 11/00 Producing optical signals at preselected times

G04G 13/00 Producing acoustic time signals

G04G 13/02 ・at preselected times, e.g. alarm clocks

G04G 13/021 ・・{Details}

G04G 13/023 ・・・{Adjusting the duration or amplitude of signals}

G04G 13/025 ・・{acting only at one preselected time}

G04G 13/026 ・・{acting at a number of different times}

G04G 13/028 ・・{combined with a radio}

G04G 15/00 Time-pieces comprising means to be operated at preselected times or after preselected time intervals (G04G 11/00, G04G 13/00 take precedence; {electronic timers G04F 1/005}; pulse delay circuits H03K 5/13; electronic time-delay switches H03K 17/28; electronic time-programme switches which automatically terminate their operation after the programme is completed H03K 17/296)

G04G 15/003 ・{acting only at one preselected time or during one adjustable time interval}

G04G 15/006 ・{for operating at a number of different times (cigar or cigarette receptacles or boxes with means for limiting the frequency of smoking A24F 15/005)}

G04G 17/00 Structural details ; Housings (constructional details of radio-controlled time-pieces, e.g. antennas G04R 60/00)

G04G 17/005 ・{Time-pieces combined with games}

G04G 17/02 ・Component assemblies

G04G 17/04 ・・Mounting of electronic components

G04G 17/045 ・・・{Mounting of the display}

G04G 17/06 ・・Electric connectors, e.g. conductive elastomers

G04G 17/08 ・Housings

G04G 17/083 ・・{Watches distributed over several housings}

G04G 17/086 ・・{Desktop clocks}

G04G 19/00 Electric power supply circuits specially adapted for use in electronic time-pieces

G04G 19/02 ・Conversion or regulation of current or voltage

G04G 19/04 ・・Capacitive voltage division or multiplication

G04G 19/06 ・・Regulation

G04G 19/08 ・Arrangements for preventing voltage drop due to overloading the power supply

G04G 19/10 ・Arrangements for supplying back-up power

G04G 19/12 ・Arrangements for reducing power consumption during storage

G04G 21/00 Input or output devices integrated in time-pieces

G04G 21/02 ・Detectors of external physical values, e.g. temperature

G04G 21/025 ・・{for measuring physiological data}

G04G 21/04 ・using radio waves (radio-controlled time-pieces G04R)

G04G 21/06 ・using voice

G04G 21/08 ・Touch switches specially adapted for time-pieces

G04G 99/00 Subject matter not provided for in other groups of this subclass

G04G 99/003 ・{Pulse shaping; Amplification}

G04G 99/006 ・{Electronic time-pieces using a micro-computer, e.g. for multi-function clocks}