G
SECTION G — PHYSICS
  
INSTRUMENTS
 G04
HOROLOGY
 G04B
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at preselected times or after predetermined time intervals G04C 23/00; clocks or watches with stop devices G04F 7/08)
 G04B

Note(s)

This subclass covers mechanically-driven calendar clocks or clockwork calendars, and the mechanical part of such clocks or calendars.


 G04C
ELECTROMECHANICAL CLOCKS OR WATCHES (mechanical parts of clocks or watches in general G04B; electronic time-pieces with no moving parts, electronic circuitry for producing timing pulses G04G)
 G04C

Note(s)

This subclass covers electric features of mechanically-driven clocks or watches, such as electric winding of such clocks or the provision of electric contacts thereon.


 G04D
APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES (machine tools in general B23, B24; hand tools in general B25)

 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 H03K; analogue/digital conversion in general H03M 1/00)  [2]
 G04F

Note(s)

This subclass covers:

  • apparatus for measuring-off predetermined time intervals; [2]
  • apparatus for producing such intervals as timing standards, e.g. metronomes; [2]
  • apparatus for measuring unknown intervals, e.g. precision systems for short-time-interval measurement. [2]


 G04G
ELECTRONIC TIME-PIECES  [3]
 G04G

Note(s)

  1. This subclass covers:
    • electronic time-pieces with no moving parts; [3]
    • electronic circuitry for producing timing pulses irrespective of the nature of the time-indicating means utilised. [3]
  2. This subclass does not cover electronic time-pieces with moving parts, which are covered by subclass G04C[3]