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G04F 1/00
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers |
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G04F 1/02
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by consuming prefixed quantities of materials, e.g. by burning candle |
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G04F 1/04
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity |
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G04F 1/06
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock |
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G04F 1/08
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by a body falling a prefixed distance in air or in a viscous material |
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G04F 3/00
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork |
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G04F 3/02
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with mechanical driving mechanisms |
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G04F 3/04
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Additional arrangements in connection with ordinary non-electric clocks for this purpose |
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G04F 3/06
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with electric driving mechanisms |
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G04F 3/08
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Additional arrangements in connection with ordinary electric clocks for this purpose |
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G04F 5/00
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Apparatus for producing preselected time intervals for use as timing standards |
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G04F 5/02
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Metronomes |
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G04F 5/04
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Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators |
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G04F 5/06
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Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators using piezoelectric resonators |
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G04F 5/08
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Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators using magnetostrictive resonators |
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G04F 5/10
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Apparatus for producing preselected time intervals for use as timing standards using electric or electronic resonators |
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G04F 5/12
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Apparatus for producing preselected time intervals for use as timing standards using fluidic devices |
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G04F 5/14
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Apparatus for producing preselected time intervals for use as timing standards using atomic clocks |
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G04F 5/16
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Apparatus for producing preselected time intervals for use as timing standards using pulses produced by radio-isotopes |
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G04F 7/00
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Apparatus for measuring unknown time intervals by non-electric means |
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G04F 7/02
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Apparatus for measuring unknown time intervals by non-electric means by measuring the distance of fall or the final velocity of a falling body |
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G04F 7/04
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Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator |
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G04F 7/06
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Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stop-watch |
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G04F 7/08
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Watches or clocks with stop devices, e.g. chronograph |
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G04F 7/10
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Means used apart from the time-piece for starting or stopping same |
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G04F 8/00
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Apparatus for measuring unknown time intervals by electromechanical means |
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G04F 8/02
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Apparatus for measuring unknown time intervals by electromechanical means using an electromechanical oscillator |
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G04F 8/04
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Apparatus for measuring unknown time intervals by electromechanical means using an electromechanical oscillator using a piezoelectric oscillator |
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G04F 8/06
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Apparatus for measuring unknown time intervals by electromechanical means using an electromechanical oscillator using a magnetostrictive oscillator |
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G04F 8/08
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Means used apart from the time-piece for starting or stopping same |
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G04F 10/00
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Apparatus for measuring unknown time intervals by electric means |
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G04F 10/02
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Apparatus for measuring unknown time intervals by electric means using oscillators with passive electric resonator, e.g. lumped LC |
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G04F 10/04
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Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac |
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G04F 10/06
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Apparatus for measuring unknown time intervals by electric means by measuring phase |
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G04F 10/08
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Apparatus for measuring unknown time intervals by electric means using pulses produced by radio-isotopes |
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G04F 10/10
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Apparatus for measuring unknown time intervals by electric means by measuring electric or magnetic quantities changing in proportion to time |
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G04F 13/00
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Apparatus for measuring unknown time intervals by means not provided for in groups |
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G04F 13/02
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Apparatus for measuring unknown time intervals by means not provided for in groups using optical means |
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G04F 13/04
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Apparatus for measuring unknown time intervals by means not provided for in groups using electrochemical means |
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G04F 13/06
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Apparatus for measuring unknown time intervals by means not provided for in groups using fluidic means |
