IPC 7 English version G04C !A-G04C 23/50

G04C-G04C02350

SECTION G – PHYSICS

G 04

HOROLOGY

G 04 C

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)

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

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

by electromagnets

by electric motors with rotating or with reciprocating movement

winding-up springs

raising weights

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

of the spring

of the weights

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

wherein movement is regulated by a pendulum

027

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

033

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

wherein movement is regulated by a balance

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

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

driven by electromagnetic means [3]

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

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

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]

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

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

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

brought into action by radio transmission

by blocking the driving means [3]

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

by electric drive [3]

10/

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

10/

the power supply being a radioactive source [3]

10/

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

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

11/

Synchronisation of independently-driven clocks

11/

by radio

11/

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

11/

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

11/

using an electric magnet or motor [3]

13/

Driving mechanisms for clocks by master clocks

13/

Circuit arrangements; Electric clock installations

13/

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

13/

Master clocks

13/

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

13/

Slave clocks actuated intermittently

13/

by electromechanical step-advancing mechanisms

13/

with rotating armature [3]

13/

by continuously-rotating electric motors [3]

13/

by electrically-released mechanical driving mechanisms

15/

Clocks driven by synchronous motors

Indicating the time or producing time signals electrically

17/

Indicating 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/

by electric lamps

19/

Producing optical time signals at prefixed times by electric means

19/

by electric lamps

19/

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

21/

Producing acoustic time signals by electrical means

21/

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

21/

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

21/

by striking mechanism

21/

with snail

21/

with locking plate

21/

by electro-acoustic means

21/

Electro-acoustic time announcement, i.e. spoken

21/

producing the signals at adjustable fixed times

21/

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

21/

by closing a contact to ring an electromechanical alarm

21/

put into action by the arbor of a mechanical alarm work

21/

put into action by the spring of a mechanical alarm work

21/

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

21/

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

21/

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

21/

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

21/

Devices on watches or similar portable time-pieces

21/

Signal-repeating devices

21/

Adjusting the duration of signals

23/

Clocks 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/

Constructional details

23/

Housings, supports, shielding, or similar stationary parts

23/

Driving or regulating means

23/

Programming means

23/

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

23/

Electric circuitry

23/

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

23/

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

23/

for operating one device at a number of different times

23/

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

23/

with the actuating element carried by a disc

23/

the actuating element controlling another element mechanically

23/

for operating a number of devices at different times

23/

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

23/

with the actuating element carried by a disc

23/

the actuating element controlling another element mechanically

23/

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

23/

by external influences

23/

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

23/

using continuously-running mechanism

23/

acting only at the end of a single time interval

23/

with provision for selection from a number of preset intervals

23/

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

23/

acting at the ends of successive time intervals

23/

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