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IPC 7
G04C-G04C02350

SECTION G – PHYSICS


G 04HOROLOGY


G 04 CELECTROMECHANICAL 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)


Note

 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.


Subclass Index

ELECTRIC WINDING OF MECHANICAL CLOCKS 

G04C 1/00 

ELECTROMECHANICAL CLOCK MOVEMENTS; ELECTRIC OR MAGNETIC ESCAPEMENTS 

G04C 3/00, G04C 5/00 

TIME INDICATING 

Optical; acoustical means 

G04C 17/00, G04C 19/00; G04C 21/00 

TIME SETTING 

G04C 9/00 

POWER SUPPLIES 

G04C 10/00 

SYNCHRONISATION; MASTER-AND-SLAVE CLOCK SYSTEM; SYNCHRONOUS-MOTOR CLOCKS 

G04C 11/00; G04C 13/00; G04C 15/00 

CLOCKS FOR OPERATING A DEVICE AT A PRESELECTED TIME 

G04C 23/00 



Electric winding of mechanical clocks; Independent electric clocks or watches


1/

00Winding mechanical clocks electrically (winding mechanically G04B 3/00)

1/

02.by electromagnets

1/

04.by electric motors with rotating or with reciprocating movement

1/

06..winding-up springs

1/

08..raising weights

1/

10.Protection against overwinding (in mechanical clocks or watches G04B 1/20, G04B 3/06, G04B 3/10)

1/

12..of the spring

1/

14..of the weights


3/

00Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means

3/

02.wherein movement is regulated by a pendulum

3/

027..using electromagnetic coupling between electric power source and pendulum (G04C 3/033 takes precedence)  [3]

3/

033..using torsion pendulums; using conical pendulums (construction thereof G04B 17/00)  [3]

3/

04.wherein movement is regulated by a balance

3/

06..using electromagnetic coupling between electric power source and balance  [3]

3/

08.wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork  [3]

3/

10..driven by electromagnetic means  [3]

3/

12..driven by piezo-electric means; driven by magneto-strictive means  [3]

3/

14.incorporating a stepping motor (G04C 3/02 to G04C 3/12 take precedence)  [3]

3/

16.incorporating an electro-dynamic continuously rotating motor (G04C 3/02 to G04C 3/12 take precedence; clocks driven by synchronous motors G04C 15/00)  [3]

3/

18.incorporating electro-thermal or electro-pneumatic driving means  [3]


5/

00Electric or magnetic means for converting oscillatory to rotary motion in time-pieces, i.e. electric or magnetic escapements (regulators G04C 3/00) [3]


9/

00Electrically-actuated devices for setting the time-indicating means (of slave clocks G04C 13/03; mechanical setting devices G04B 27/00) [3]

9/

02.brought into action by radio transmission

9/

04.by blocking the driving means  [3]

9/

06.by decoupling the driving means (combined with blocking means G04C 9/04)  [3]

9/

08.by electric drive  [3]


10/

00Arrangements of electric power supplies in time-pieces  [3]

10/

02.the power supply being a radioactive source  [3]

10/

04.with means for indicating the condition of the power supply  [3]


Electric clock installations; Master-and-slave clock systems; Synchronous-motor clocks


11/

00Synchronisation of independently-driven clocks

11/

02.by radio

11/

04.over a line (transmitting time signals over telephone networks H04M 11/06)

11/

06.with direct mechanical action on the time-indicating means  [3]

11/

08.using an electric magnet or motor  [3]


13/

00Driving mechanisms for clocks by master clocks

13/

02.Circuit arrangements; Electric clock installations

13/

03..Pulse transmission systems with additional means for setting the time indication of slave clocks  [3]

13/

04..Master clocks

13/

06...Contact devices (for simultaneously winding several clocks G04C 1/00)

13/

08.Slave clocks actuated intermittently

13/

10..by electromechanical step-advancing mechanisms

13/

11...with rotating armature  [3]

13/

12..by continuously-rotating electric motors  [3]

13/

14..by electrically-released mechanical driving mechanisms


15/

00Clocks driven by synchronous motors


Indicating the time or producing time signals electrically


17/

00Indicating the time optically by electric means (G04C 19/00 takes precedence; liquid crystal materials C09K 19/00; by mechanical means G04B 19/00, G04B 19/20) [3]

17/

02.by electric lamps


19/

00Producing optical time signals at prefixed times by electric means

19/

02.by electric lamps

19/

04.by indicating members moved electrically, e.g. flap, band


21/

00Producing acoustic time signals by electrical means

21/

02.Constructional details (G04C 21/04, G04C 21/16 take precedence)

21/

04.Indicating the time of the day (acoustic indication of time G04B 21/00)

21/

06..by striking mechanism

21/

08...with snail

21/

10...with locking plate

21/

12..by electro-acoustic means

21/

14...Electro-acoustic time announcement, i.e. spoken

21/

16.producing the signals at adjustable fixed times

21/

18..by mechanically unlocking an electromechanical vibrator, e.g. actuated by the leakage flux of the electric driving means

21/

20..by closing a contact to ring an electromechanical alarm

21/

22...put into action by the arbor of a mechanical alarm work

21/

24...put into action by the spring of a mechanical alarm work

21/

26...put into action by the vibrations caused by the operation of a mechanical alarm work

21/

28..by closing a contact to put into action electro-acoustic means, e.g. awakening by music

21/

30..with provision for a number of operations at different times, e.g. ringing the bells in a school

21/

32...giving indications at a number of places, each at a different time, e.g. system of alarms in a hotel

21/

34..Devices on watches or similar portable time-pieces

21/

36..Signal-repeating devices

21/

38..Adjusting the duration of signals


23/

00Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals (if restricted to producing acoustic time signals by electrical means G04C 21/00; mechanical alarm clocks G04B 23/02; apparatus which can be set and started to measure-off predetermined intervals G04F 3/06; time or time-programme switches which automatically terminate their operation after the programme is completed H01H 43/00)

23/

02.Constructional details

23/

04..Housings, supports, shielding, or similar stationary parts

23/

06..Driving or regulating means

23/

08..Programming means

23/

10..for actuating any element which operates, or initiates the operation of, the device concerned

23/

12..Electric circuitry

23/

14.Mechanisms continuously running to relate the operation(s) to the time of day

23/

16..acting only at one preselected time or during one adjustable time interval

23/

18..for operating one device at a number of different times

23/

20...with contacts operated, or formed, by clock hands or elements of similar form

23/

22...with the actuating element carried by a disc

23/

24....the actuating element controlling another element mechanically

23/

26..for operating a number of devices at different times

23/

28...with contacts operated, or formed, by clock hands or elements of similar form

23/

30...with the actuating element carried by a disc

23/

32....the actuating element controlling another element mechanically

23/

34..with provision for automatic modification of the programme, e.g. on Sunday

23/

36...by external influences

23/

38.Mechanisms measuring a chosen time interval independently of the time of day at which the interval starts

23/

40..using continuously-running mechanism

23/

42..acting only at the end of a single time interval

23/

44...with provision for selection from a number of preset intervals

23/

46...with provision for adjustment of the interval (G04C 23/44 takes precedence)

23/

48..acting at the ends of successive time intervals

23/

50..with provision for modification of the interval(s) by external influences


  
 

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