IPC 6 English version G04B 21/00-G04B 49/04

G04B02100-G04B04904

SECTION G– PHYSICS

G 04

HOROLOGY

G 04 B

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 F 03 G; electromechanical clocks or watches G 04 C; electromechanical clocks with attached or built-in means operating any device at preselected times or after predetermined time intervals G 04 C 23/00; clocks or watches with stop devices G 04 F 7/08)

21/

Indicating by acoustic means (at preselected times G 04 B 23/00; by electro-acoustic means G 04 C 21/04; sound-producing apparatus per se G 10)

21/

Regular striking mechanisms giving the full hour, half hour, or quarter hour

21/

Hour wheels; Racks or rakes; Snails or similar control mechanisms

21/

Details of striking mechanisms, e.g. hammer, fan governor

21/

Sounding bodies; Whistles; Musical apparatus (with electro-acoustic transmitters G 04 C 21/00)

21/

Releasing or locking the regular stroke, e.g. for silence during the night

21/

Reiterating watches or clocks

21/

Winding-up the striking mechanism by the clockwork; Winding-up the clockwork by the striking mechanism

23/

Arrangements producing acoustic signals at preselected times (metronomes G 04 F 5/02; sound-producing apparatus per se G 10)

23/

Alarm clocks (electrically-released alarm signals G 04 C 21/00)

23/

Alarm signal stop arrangements [3]

23/

with coarse and fine setting of the preselected time

23/

adjustable for several preselected times with automatic stopping of the signal

23/

operating on successive days without resetting; operating only once in each 24 hours

23/

with presignal; with repeated signal; with changeable intensity of sound

23/

Alarm watches to be worn in pockets or on the wrist (giving signals by stimulating the skin G 04 B 25/04)

25/

Indicating the time by other means or by combined means (electric or electromechanical indicating G 04 C)

25/

by feeling; Clocks or watches for blind persons

25/

Alarm clocks or watches with devices stimulating the skin

25/

by moving figures, e.g. cuckoo-clock, trumpet clock

27/

Mechanical devices for setting the time-indicating means

27/

by making use of the winding means

27/

with clutch wheel

27/

with rocking bar

27/

by using parts of the case

Frameworks, supports, or arrangements of the clockwork parts in relation to each other, so-called "calibers"

29/

Frameworks

29/

Plates; Bridges; Cocks

29/

Connecting or supporting parts

31/

Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor (bearings in general F 16 C)

31/

004

characterised by the material used [3]

31/

008

Jewel bearings (G 04 B 31/04 takes precedence) [3]

31/

012

Metallic bearings [3]

31/

016

Plastic bearings [3]

31/

Shock-damping bearings

31/

with jewel hole and cap jewel [3]

31/

Manufacture or mounting processes [3]

31/

Lubrication [3]

33/

Calibers

33/

Circular calibers

33/

Non-circular calibers

33/

of extremely flat shape

33/

in which the gear train is arranged in different planes, e.g. parallel or inclined to each other (G 04 B 33/10 takes precedence)

33/

with seconds hand arranged in the centre of the dial

33/

for extremely-long running times

33/

Calibers of which the mainsprings or barrels are easily removable (mainsprings G 04 B 1/14; barrels, arbors G 04 B 1/16)

33/

with arrangements affording protection of the clockwork against damage as a consequence of a rupture of the mainspring

35/

Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears

Protection of the clockwork against damage from outside

37/

Cases

37/

Evacuated cases; Cases filled with gases or liquids; Cases containing substances for absorbing or binding moisture or dust

37/

Mounting the clockwork in the case; Shock-absorbing mountings

37/

Fixed mountings for pocket or wrist watches [3]

37/

Forming the passage for the winding stem through the case; Divided winding stems

37/

Hermetic sealing of openings, joints, passages, or slits

37/

of winding stems

37/

of the back cover of pocket or wrist watches [3]

37/

Cases for special purposes, e.g. watch combined with ring, watch combined with button (watch guards or protectors A 45 C 11/10, A 45 C 11/12; watches combined with cosmetic powder containers A 45 D 33/30)

37/

Suspending devices, supports, or stands for time-pieces in so far as they form part of the case (wrist-watch straps, fastening means therefor A 44 C 5/00)

37/

Fastening the case to the bracelet [3]

37/

for pocket or wrist watches (G 04 B 37/02 to G 04 B 37/16 takes precedence) [3]

37/

with hinged covers or backs [3]

37/

Materials or processes of manufacturing pocket watch or wrist watch cases [3]

39/

Watch crystals; Fastening or sealing crystals; Clock glasses

39/

Sealing crystals or glasses [3]

41/

Locking or holding devices for pendulums, chimes, or the like, for use during transport

43/

Protecting clockworks by shields or other means against external influences, e.g. magnetic fields

Clocks with unusual features

45/

Time-pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effect (ornamental shaping of dials G 04 B 19/10)

45/

Time-pieces of which the clockwork is visible partly or wholly

45/

Time-pieces with invisible drive, e.g. with hands attached to rotating glass disc

47/

Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece (G 04 B 37/12 takes precedence; writing or drawing implements with devices for indicating time B 43 K 29/087; combined with cameras, projectors, or photographic printing apparatus G 03 B 29/00)

47/

Installations within mirrors, pictures, furniture, or other household articles (combinations with vehicle mirror assemblies B 60 R 1/12)

47/

with attached ornaments or amusement apparatus

47/

with attached measuring instruments, e.g. pedometer, barometer, thermometer, compass

49/

Time-pieces using the position of the sun, moon, or stars

49/

Sundials

49/

Graduation or shaping of dials

G04 - G04B 19/34