G
SECTION G — PHYSICS
  
INSTRUMENTS
 G04
HOROLOGY
 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]
 G04G 1/00
Subject matter not provided for in groups G04G 3/00-G04G 15/00  [3]
 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)  [3]
 G04G 3/02
·  Circuits for deriving low frequency timing pulses from pulses of higher frequency (pulse frequency dividers in general H03K 23/00-H03K 29/00)  [3]
 G04G 5/00
Setting, i.e. correcting or changing, the time-indication  [3]
 G04G 5/02
·  by temporarily changing the number of pulses per unit time, e.g. quick-feed method  [3]
 G04G 5/04
·  by setting each of the displayed values, e.g. date, hour, independently  [3]
 G04G 7/00
Synchronisation  [3]
 G04G 7/02
·  by radio  [3]
 G04G 9/00
Visual time or date indication means  [3]
 G04G 9/02
·  by selecting desired characters out of a number of characters or by selecting indicating elements the position of which represent the time, e.g. by using multiplexing techniques  [3]
 G04G 9/04
·  ·  by controlling light sources, e.g. electroluminescent diodes  [3]
 G04G 9/06
·  ·  using light valves, e.g. liquid crystals  [3]
 G04G 9/08
·  by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques  [3]
 G04G 9/10
·  ·  by controlling light sources, e.g. electroluminescent diodes  [3]
 G04G 9/12
·  ·  using light valves, e.g. liquid crystals  [3]
 G04G 11/00
Producing optical signals at preselected times  [3]
 G04G 13/00
Producing acoustic time signals  [3]
 G04G 13/02
·  at preselected times, e.g. alarm clocks  [3]
 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; 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)  [3]