WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

G04F　TIME-INTERVAL MEASURING (measuring pulse characteristics G01R, e.g. G01R 29/02; in radar or like systems G01S; masers H01S 1/00; generation of oscillations H03B; generation or counting of pulses, frequency dividing, analogue/digital conversion H03K){time fuzes F42C 9/00}

G04F 1/00 Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timer (electric time and time-programme switches H01H 43/00)

G04F 1/005 ・{using electronic timing, e.g. counting means (pulse time delay arrangements H03K 5/13; modifications of electronic switches for introducing a time delay before switching H03K 17/28)}

G04F 1/02 ・by consuming prefixed quantities of materials, e.g. by burning candle

G04F 1/04 ・by movement or acceleration due to gravity

G04F 1/06 ・・by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock

G04F 1/063 ・・・{using acoustic signalling}

G04F 1/066 ・・・{using electrical contact device}

G04F 1/08 ・・by a body falling a prefixed distance in air or in a viscous material

G04F 3/00 Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeter with clockwork (electric time or time-programme switches H01H 43/00)

G04F 3/02 ・with mechanical driving mechanisms

G04F 3/022 ・・{using mechanical signalling device}

G04F 3/025 ・・{mechanically actuated (cigar or cigarette receptacles or boxes with means for limiting the frequency of smoking A24F 15/005)}

G04F 3/027 ・・{using electrical contacts, e.g. for actuating electro-acoustic device}

G04F 3/04 ・・Additional arrangements in connection with ordinary non-electric clocks for this purpose

G04F 3/06 ・with electric driving mechanisms

G04F 3/08 ・・Additional arrangements in connection with ordinary electric clocks for this purpose

G04F 5/00 Apparatus for producing preselected time intervals for use as timing standards (generating clock signals for electric digital computers G06F 1/04; regulating frequency in general H03C, H03L)

G04F 5/02 ・Metronomes {periodic signalisation by acoustic signals in general G04B 21/005}

G04F 5/022 ・・{Mechanic metronomes}

G04F 5/025 ・・[N: Electronic metronomes {rhytem generation for electrophonic musical instruments G10H 1/36}

G04F 5/027 ・・{using electro-mechanical driving e.g. of optical scanned recordings (electrophonic musical instruments in which tones are generated by electromechanical means e.g. by using pick-up means for reading recorded waves G10H 3/00)}

G04F 5/04 ・using oscillators with electromechanical resonators {producing electric oscillations or timing pulses}

G04F 5/06 ・・using piezoelectric resonators

G04F 5/063 ・・・[N: Constructional details (details of resonators in general H03H 9/02)

G04F 5/066 ・・・・{Trimmer condensators (capacitors in general H01G)}

G04F 5/08 ・・using magnetostrictive resonators

G04F 5/10 ・using electric or electronic resonators (G04F 5/14 takes precedence)

G04F 5/12 ・using fluidic devices

G04F 5/14 ・using atomic clocks

G04F 5/145 ・・{using Coherent Population Trapping}

G04F 5/16 ・using pulses produced by radioisotopes

G04F 7/00 Apparatus for measuring unknown time intervals by mechanical means

G04F 7/02 ・by measuring the distance of fall or the final velocity of a falling body

G04F 7/04 ・using a mechanical oscillator

G04F 7/06 ・・running only during the time interval to be measured, e.g. stop-watch

G04F 7/062 ・・・{with reset mechanisms}

G04F 7/065 ・・・{with start-stop control arrangements}

G04F 7/067 ・・・・{with a single push-button or actuation member for start-stop and reset}

G04F 7/08 ・・Watches or clocks with stop devices, e.g. chronograph

G04F 7/0804 ・・・{with reset mechanisms}

G04F 7/0809 ・・・・{with single hammers, i.e. one hammer acts on each counter}

G04F 7/0814 ・・・・{with double hammer , i.e. one hammer acts on two counters}

G04F 7/0819 ・・・・{with triple hammer, i.e. one hammer acts on three counters}

G04F 7/0823 ・・・{with couplings between the chronograph mechanism and the base movement}

G04F 7/0828 ・・・・{acting in the plane of the movement}

G04F 7/0833 ・・・・{acting perpendicular to the plane of the movement}

G04F 7/0838 ・・・・{involving a tilting movement}

G04F 7/0842 ・・・{with start-stop control mechanisms}

G04F 7/0847 ・・・・{with column wheel}

G04F 7/0852 ・・・・{with member having a rotational two-way movement, e.g. navette}

G04F 7/0857 ・・・・{with single push-button or actuation member for start-stop and reset}

G04F 7/0861 ・・・・{actuated by other than push-buttons, e.g. bezel or lever}

G04F 7/0866 ・・・{Special arrangements}

G04F 7/0871 ・・・・{with multiple chronograph functions, i.e. to count multiple running times (alternate time counting G07C)}

G04F 7/0876 ・・・・{Split-time function e.g. rattrappante}

G04F 7/088 ・・・・{with display of fraction of seconds, e.g. foudroyante}

G04F 7/0885 ・・・・{Modular constructions involving interchangeability with one or more chronograph modules on a single base movement}

G04F 7/089 ・・・・{indicating measured time by other than hands; e.g. numbered bands, drums, discs or sheet (current time indication other than by hand G04B 19/20)}

G04F 7/0895 ・・・・{with a separate barrel for the chronograph functions (barrel in a separable module G04F 7/08S08)}

G04F 7/10 ・Means used apart from the time-piece for starting or stopping same {see provisionally too : G04F 8/08}

G04F 8/00 Apparatus for measuring unknown time intervals by electromechanical means

G04F 8/003 ・{using continuously running driving means}

G04F 8/006 ・{running only during the time interval to be measured, e.g. stop-watch}

G04F 8/02 ・using an electromechanical oscillator {G04F 5/00, G04F 10/00 take precedence}

G04F 8/04 ・・using a piezoelectric oscillator {not used}

G04F 8/06 ・・using a magnetostrictive oscillator {not used}

G04F 8/08 ・Means used apart from the time-piece for starting or stopping same

G04F 10/00 Apparatus for measuring unknown time intervals by electric means {timing devices for clocks or watches for comparing the rate of the oscillating member with a standard G04D 7/12; radar systems, analogous systems G01S 7/00; measuring frequency G01R 23/00; measuring phase angle G01R 25/00}

G04F 10/005 ・{Time-to-digital converters [TDC}(analog-to-digital converters with intermediate conversion to time or phase H03M 1/50, H03M 1/60)]

G04F 10/02 ・using oscillators with passive electric resonator, e.g. lumped LC {G04F 10/04, G04F 10/06 and G04F 10/10 take precedence}

G04F 10/04 ・by counting pulses or half-cycles of an alternating current {(G04F 10/005 takes precedence)}

G04F 10/06 ・by measuring phase {(G04F 10/005 takes precedence)}

G04F 10/10 ・by measuring electric or magnetic quantities changing in proportion to time

G04F 10/105 ・・{with conversion of the time-intervals}

G04F 13/00 Apparatus for measuring unknown time intervals by means not provided for in groups G04F 5/00 to G04F 10/00

G04F 13/02 ・using optical means

G04F 13/023 ・・{using cathode-ray oscilloscopes (circuits for inserting reference time markers for cathode-ray oscilloscopes G01R 13/305)}

G04F 13/026 ・・{Measuring duration of ultra-short light pulses, e.g. in the pico-second range; particular detecting devices therefor (non-linear optics G02F 1/35; monitoring arrangements for lasers in general H01S 3/0014; photometry, radiation pyrometry G01J 1/00, G01J 5/00)}

G04F 13/04 ・using electrochemical means

G04F 13/06 ・using fluidic means