Skip over navigation
Printable version [PDF]
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})
Definition statement
This subclass covers:
  • apparatus for measuring-off predetermined time intervals;
  • apparatus for producing such intervals as timing standards, e.g. metronomes;
  • apparatus for measuring unknown intervals, e.g. precision systems for short-time-interval measurement.
References relevant to classification in this subclass
This subclass does not cover:

time fuzes

Informative references
Attention is drawn to the following places, which may be of interest for search:

measuring pulse characteristics;

in radar or like systems;

masers;

generation of oscillations;

generation or counting of pulses, frequency dividing, analogue/digital conversion

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)
Informative references
Attention is drawn to the following places, which may be of interest for search:

electric time and time-programme switches

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)
Informative references
Attention is drawn to the following places, which may be of interest for search:

electric time and time-programme switches

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)
References relevant to classification in this subclass
This group does not cover:

generating clock signals for electric digital computers

Informative references
Attention is drawn to the following places, which may be of interest for search:

regulating frequency in general

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)}
References relevant to classification in this subclass
This group does not cover:

timing devices for clocks or watches for comparing the rate of the oscillating member with a standard

Informative references
Attention is drawn to the following places, which may be of interest for search:

radar systems, analogous systems

measuring frequency

measuring phase angle

Apparatus for measuring unknown time intervals by means not provided for in groups G04F 5/00 to G04F 10/00
References relevant to classification in this subclass

Places in relation to which this group is residual:

Apparatus for producing preselected time intervals for use as timing standards

Apparatus for measuring unknown time intervals by mechanical means

Apparatus for measuring unknown time intervals by electromechanical means

Apparatus for measuring unknown time intervals by electric means

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013