EP0008832A2 - Ein Differentialgetriebe enthaltendes Uhrwerk mit Zeigern - Google Patents

Ein Differentialgetriebe enthaltendes Uhrwerk mit Zeigern Download PDF

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Publication number
EP0008832A2
EP0008832A2 EP79200475A EP79200475A EP0008832A2 EP 0008832 A2 EP0008832 A2 EP 0008832A2 EP 79200475 A EP79200475 A EP 79200475A EP 79200475 A EP79200475 A EP 79200475A EP 0008832 A2 EP0008832 A2 EP 0008832A2
Authority
EP
European Patent Office
Prior art keywords
wheel
satellite
teeth
pinion
planetary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP79200475A
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English (en)
French (fr)
Other versions
EP0008832A3 (en
EP0008832B1 (de
Inventor
Pierre-Alain Vuille
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebauchesfabrik ETA AG filed Critical Ebauchesfabrik ETA AG
Publication of EP0008832A2 publication Critical patent/EP0008832A2/de
Publication of EP0008832A3 publication Critical patent/EP0008832A3/xx
Application granted granted Critical
Publication of EP0008832B1 publication Critical patent/EP0008832B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • 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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/005—Mechanical devices for setting the time indicating means stepwise or on determined values
    • G—PHYSICS
    • 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
    • G04B13/00—Gearwork
    • G04B13/007—Gearwork with differential work
    • G—PHYSICS
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/221—Arrangements for indicating different local apparent times; Universal time pieces mechanisms for correcting the hours hand only, i.e. independently for minutes and seconds hands

Definitions

  • the subject of the present invention is a clockwork movement with hands comprising a differential gear mechanism controlling the position of the hour hand and itself comprising a planet carrier, at least one satellite with two coaxial teeth, a planetary pinion. and a planetary wheel, the planet (s) being engaged simultaneously with the planetary wheel and with the planetary gear.
  • patent CH 507 544 proposed a composite hour wheel formed of two parts frictionally coupled to each other, the relative positions of these two parts being determined by the engagement of a pin secured to one parts in the holes of the other part.
  • the complete arrangement includes friction between the roadway and the shaft which drives it and a second friction in the composite hour wheel.
  • Patents F 1,589,638 and CH 494,997 propose another solution in which the composite hours mobile is replaced by a differential gear comprising a planet carrier and a satellite with two teeth.
  • the satellite wheel is engaged with the roadway while its pinion is engaged with the hour wheel.
  • the satellite normally plays the role of the timer wheel, but by moving the planet carrier by means of a control member, one can cause a rapid rotation of the hour wheel without changing the position of the roadway.
  • a device of this kind therefore avoids the presence of a friction coupling.
  • German patent application DOS 16 73 621 also describes an arrangement of this type.
  • the patent application DOS 2,730,948 also describes a differential gear mechanism comprising a satellite with two teeth. In this case, it is the planetary pinion which constitutes the control mobile. The satellite is mounted on a toothed disc which constitutes the minute wheel and its pinion toothing is engaged with the hour wheel.
  • a differential gear mechanism comprising a satellite with two teeth. In this case, it is the planetary pinion which constitutes the control mobile.
  • the satellite is mounted on a toothed disc which constitutes the minute wheel and its pinion toothing is engaged with the hour wheel.
  • Patent CH 513 445 application filed No 14 913/68
  • any friction coupling has been avoided.
  • the entire gear includes several branches, so that it is possible to act by a planetary gear on an hour hand which indicates the local time to change its position without influencing the progress of the other hands.
  • this arrangement presents a great complication.
  • the object of the present invention is to produce a timepiece movement of the type mentioned at the start in which the differential gear is arranged so that the reaction exerted on the mobile engaged with the gear train when a movement of the movement is controlled. 'hour hand is minimum, this gear can therefore be introduced into electronic quartz wristwatch movements in which the engine torque is very low.
  • the timepiece movement according to the invention is characterized in that the planet carrier is arranged in the hour wheel, the planetary gear is arranged in the roadway and the silent planer wheel is a internal gear ring surrounding the path of the satellite (s) and connected to a mechanism control member.
  • the movement shown in fig. 1 is a watch movement which can be either an electronic battery and quartz watch, comprising a stepping motor actuating a gear train, or a mechanical watch. All of these are classic. They are mounted on the reverse of plate 1 and are not shown in the drawing.
  • the train comprises a drive pinion 2 which is engaged with a minute wheel 3 coaxial with the movement, so that this wheel is driven at the rate of one revolution per hour.
  • the minute wheel 3 is an element of the assembly shown in FIGS. 2 and 3. They will be described later.
  • the assembly shown in Figs. 2 and 3 notably includes an hour wheel which drives a calendar mechanism advancing by jumps, once per 24 hours, a date ring 4.
  • the calendar mechanism is also of the usual type, so that it will not be described in detail here.
  • the calendar is corrected by means of the control mechanism which is actuated by the rod 5 (fig. 1). This rod is arranged radially in the movement between the plate 1 and the bridges. It activates the control mechanism visible in fig.
  • the star 14b cooperates with an elastic arm 15 playing the role of jumper and extending from a retaining plate 16 placed on the plate 1.
  • the role of the mobile 14 and that of the jumper spring 15 will be explained later in relationship with the differential gear that drives the needles.
  • the movable reference 12 mounted on the rocker 9 engages with a time setting reference 17 which meshes with the roadway as will be seen below.
  • the rod 5 therefore makes it possible to exercise the functions of setting the time of the hands, and of advancing the hour hand alone by jumps of one hour. This last function also ensures the correction of the calendar if necessary.
  • the rod is disconnected and this position is a neutral position.
  • Figs. 2 and 3 show how the motor and the mechanism of the actuator act on the organs which carry the needles.
  • the second hand 18 is mounted at the end of a second shaft 19 which has a wheel 20 engaged with the cog operated by the engine.
  • the seconds shaft 19 is supported by a bearing 21 mounted in the plate 1.
  • the upper surface of this bearing retains in place the barrel of the carriageway 22 which carries the minute hand 23.
  • the carriageway carries in the vicinity of its lower end a large diameter disc 24 provided with a peripheral toothing in which the time-setting reference gear 17 engages. Above the disc 24, the carriageway: has a seat 22a on which the minute wheel 3 is adjusted.
  • the tightening of this wheel on the carriageway of the carriageway is adjusted so as to produce a friction coupling having a well-defined disengaging torque.
  • the disc of the minute wheel is cut so as to present two parallel and narrow bars 38 and 39 which may have notches in an arc of radius corresponding to that of the adjustment range 22a.
  • the tightening exerted by the bars 38 and 39 on the friction surface of the roadway can thus be precisely adjusted by allowing a slight bending of the bars.
  • a road pinion 25 is still driven on the barrel 22, immediately above the wheel 3. It meshes, as cm sees in fig. 3, in the toothing of the wheel of a satellite 26 with two toothing carried by a disc 27 secured to a barrel 28 and constituting with this barrel the hour wheel.
  • the disc 27 is provided with a key-shaped hole 29 which allows the stallite 26 to be put in place, which is machined in one piece with a pinion toothing of very small diameter and a toothing of the wheel which , as mentioned above, meshes in the road pinion 25.
  • the peripheral toothing of the disc 27 meshes in the toothing of the wheel of a caleridier mobile 30 rotating on a pin 31 fixed in the Latin p 1.
  • the toothing of calendar calendar pinion drives a 24-hour wheel 32 provided with an elastic finger capable of driving calendar ring 4 once per turn by hooking one of its inner teeth, these being regularly distributed around its periphery .
  • the barrel 28 carries the hour hand 33. It rests on the upper face of the road pinion 25 and is held in place by the last element 34 of the differential gear.
  • This last element which plays the role of a planetary wheel, is a crown with internal teeth provided with a pivot bearing 35 having a diameter slightly larger than that of the crown teeth and a peripheral external teeth 36.
  • the element 34 is positioned by the retaining plate 16 which has in its central part a circular hole in which engages the bearing 35.
  • This plate covers the external part of the element 34 and is used to hold in place axially. As it is screwed onto the plate, it assures the assembly of the differential mechanism and the control mechanism. It makes it possible to house all these elements in a very limited space.
  • the toothing 36 of the crown 34 is in engagement with the toothing of the wheel 14a of the mobile 14 which, as we have seen above, also includes the star 14b located immediately under the wheel 14a and the pinion 14c located under the star 14b.
  • the intermediate return 13 and the mobile 14 both pivot on pins planted in the plate. They are held in place axially by corresponding elements of the holding plate.
  • the latter also has a hole 37 (fig. 1 and 2) used to limit the movements of the movable gear 12 by cooperating with the end of the axis of this gear, this axis being integral with the rocker 9 and extending projecting to the level of the part of the retaining plate which has the hole 37.
  • the hands are regularly driven by the watch motor. While the shaft 19 of the second hand, connected to the motor rotor by a gear train, is actuated by pulses, this gear train also transmits the engine torque to the pinion 2 and to the wheel 3. That -this causes the roadway 22 by friction and as the crown 34 is fixed, the roadway pinion 25 causes the satellite 26 to roll by its pinion teeth on the internal teeth of the crown 34. As a result, the satellite carrier 27 which plays the hour wheel role rotates slowly around the axis of movement, driven by the intermediate shaft of the satellite 26.
  • the reference 12 When the rod is brought into the time setting position, the reference 12 is engaged with the time setting reference 17 and a rotation of the rod rotates the disc 24 secured to the roadway 22. Under these conditions , a contact will switch off the watch engine, including all of the gear train. The wheel 3 will be blocked, while the roadway 22 frictionally connected to the wheel 3 will be driven at a relatively high speed. As in normal operation, but at a higher speed, the pinion 25 will roll the satellite 26 on the inner ring 34_ by moving the hour hand 33 at a speed twelve times lower than the minute hand. Thus, the two hands move in their normal ratio, the second hand being stopped.
  • the motor In the intermediate position of the rod, the motor is not blocked, so that the second hand advances at the rate imposed by the time base of the watch. If the rod is moved in rotation, the intermediate return 13 rotates the mobile 14 and the rotation of the latter is marked by stop positions in which the head of the jumper 15 engages between two teeth of the star 14b .
  • the rotation of the mobile 14 is therefore a jerky rotation.
  • the angle of rotation which, for the crown placed at the head of the rod, corresponds to a rotation of 72 ° of the mobile 14 being of the order of 60 °, this angle is substantially that which is easily imparted to the crown holding it between the thumb of the index finger. As the wheel 14a is engaged with the external toothing of the element 34, it is now the latter which is driven in rotation.
  • the teeth of the wheel teeth of the satellite 26 rest on the pinion 25 which acts as a planetary gear and the satellite is moved in rotation around the axis of the needles by the internal toothing of the element 34. By its axis, the satellite rotates the wheel 27, driving the hour hand 33.
  • the displacement corresponding to a jump of the star 14b corresponds to 1/12 of a turn of the hand 33 and therefore to a advance one hour.
  • Fig. 4 schematically represents the assembly of the differential gear described above and shows in its right part the points of application of the forces.
  • the element 34 is forcedly driven by the control mechanism. It exerts on the pinion teeth of the satellite 26 a force located at level P3, therefore a torque given by the product of its distance from the axis of the needles by the tangential force. This torque produces the driving of the hour wheel by pressing the toothing of the satellite wheel on the toothing of roadway 25.
  • the force transmission on the planet carrier takes place at level P2, while the reaction on the roadway performs at level Pl.
  • the tangential force exerted on the planetary gear 25 will be reduced in the ratio of the teeth of the satellite to the tangential force exerted by the element 34 on the teeth of the satellite gear.
  • This force will itself be reduced in the ratio of the radius of the wheel teeth to the sum of the radii of the teeth of the satellite with respect to the tangential resistance force offered by the hours wheel. Even when this resistance is increased as a result of arming the calendar mechanism, the reaction on the road remains minimal.
  • the construction of the minute wheel, formed by the carriageway 22, the pinion 25, the toothed disc 24 and the wheel 3 can be improved and simplified as shown in partial figure 5.
  • the pinion 25 has a neckline in one piece with the barrel 22 of the roadway and has truncated teeth at their base.
  • the disc 24 is driven on the truncated teeth of the pinion 25 while the bearing 22a is located under the pinion 25, so that the wheel 3 is located under the disc 24.
  • This arrangement simplifies the manufacture since it only has three pieces instead of four.
  • the crimping of the wheel 3 on the bearing 22a is easier to perform.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Gears, Cams (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
EP79200475A 1978-09-04 1979-08-30 Ein Differentialgetriebe enthaltendes Uhrwerk mit Zeigern Expired EP0008832B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH9264/78 1978-09-04
CH926478A CH617815GA3 (de) 1978-09-04 1978-09-04

Publications (3)

Publication Number Publication Date
EP0008832A2 true EP0008832A2 (de) 1980-03-19
EP0008832A3 EP0008832A3 (en) 1980-04-02
EP0008832B1 EP0008832B1 (de) 1982-09-01

Family

ID=4350106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200475A Expired EP0008832B1 (de) 1978-09-04 1979-08-30 Ein Differentialgetriebe enthaltendes Uhrwerk mit Zeigern

Country Status (5)

Country Link
US (1) US4259735A (de)
EP (1) EP0008832B1 (de)
JP (1) JPS5537996A (de)
CH (1) CH617815GA3 (de)
DE (1) DE2963613D1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541005A1 (fr) * 1982-09-29 1984-08-17 Timex Corp Mecanisme de reglage des dates pour montre a calendrier
CH674290GA3 (en) * 1988-06-17 1990-05-31 Watch face time zone areas display - displays place where particular time zone is operative, with time zone area actuated by wearer
CH689710GA3 (fr) * 1994-01-26 1999-09-15 Erard Raoul Henri Montre comprenant un organe indicateur complémentaire à l'affichage de l'heure.
WO2012127056A1 (fr) * 2011-03-23 2012-09-27 Samep S.A. - Montres Emile Pequignet Support pour organe d'affichage de mouvement horloger
EP2615506A1 (de) * 2012-01-10 2013-07-17 Montres Breguet SA Vorrichtung zur Schnellkorrektur eines Anzeigesystems

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618396Y2 (de) * 1980-06-06 1986-03-14
FR2493549A3 (fr) * 1980-10-31 1982-05-07 Kieninger & Obergfell Montre ou pendulette electrique, notamment a quartz avec dispositif de reglage de position des aiguilles
CH649189GA3 (de) * 1981-12-28 1985-05-15
CH681128B5 (de) * 1990-10-02 1993-07-30 Ebauchesfabrik Eta Ag
US5155712A (en) * 1992-04-20 1992-10-13 Timex Corporation Wheel and pinion assembly with friction drive/slip coupling for a timepiece
ES2325232T3 (es) 1999-08-04 2009-08-28 Frederic Piguet S.A. Dispositivo indicador de reserva de marcha para una pieza de relojeria.
SG96702A1 (en) * 2001-11-13 2003-06-16 Glashuetter Uhrenbetrieb Gmbh Device for winding and setting the time of a timepiece such as a date-watch including a date disc
FR2867285B1 (fr) * 2004-03-03 2009-07-31 Benoit Espiau Montre
ES2375014T3 (es) * 2008-03-11 2012-02-24 Parmigiani Fleurier S.A. Mecanismo de relojería coaxial.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1589638A (de) * 1967-11-03 1970-03-31
DE1673621A1 (de) * 1967-08-14 1971-05-06 Burg Fred G Einrichtung zur wahlweisen Einstellung des Stundenzeigers einer Uhr auf die Zeit einer bestimmten Zeitzone
CH513445A (de) * 1967-11-14 1971-05-28 Bulova Watch Co Inc Zeitzonenumschaltmechanismus in einer Uhr

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1933049B2 (de) * 1969-06-30 1971-09-30 Durowe Gmbh, 7530 Pforzheim Weltzeituehr
CH765671A4 (de) * 1971-05-26 1972-12-29

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1673621A1 (de) * 1967-08-14 1971-05-06 Burg Fred G Einrichtung zur wahlweisen Einstellung des Stundenzeigers einer Uhr auf die Zeit einer bestimmten Zeitzone
FR1589638A (de) * 1967-11-03 1970-03-31
CH513445A (de) * 1967-11-14 1971-05-28 Bulova Watch Co Inc Zeitzonenumschaltmechanismus in einer Uhr

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541005A1 (fr) * 1982-09-29 1984-08-17 Timex Corp Mecanisme de reglage des dates pour montre a calendrier
CH674290GA3 (en) * 1988-06-17 1990-05-31 Watch face time zone areas display - displays place where particular time zone is operative, with time zone area actuated by wearer
CH689710GA3 (fr) * 1994-01-26 1999-09-15 Erard Raoul Henri Montre comprenant un organe indicateur complémentaire à l'affichage de l'heure.
WO2012127056A1 (fr) * 2011-03-23 2012-09-27 Samep S.A. - Montres Emile Pequignet Support pour organe d'affichage de mouvement horloger
FR2973125A1 (fr) * 2011-03-23 2012-09-28 Samep Montres Emile Pequignet Support pour organe d'affichage de mouvement horloger
US8867316B2 (en) 2011-03-23 2014-10-21 Pequignet S.A. Support for display member of a timepiece movement
EP2615506A1 (de) * 2012-01-10 2013-07-17 Montres Breguet SA Vorrichtung zur Schnellkorrektur eines Anzeigesystems
US8837260B2 (en) 2012-01-10 2014-09-16 Montres Breguet S.A. Quick correction device for a display system

Also Published As

Publication number Publication date
JPS5537996A (en) 1980-03-17
CH617815B (de)
EP0008832A3 (en) 1980-04-02
DE2963613D1 (en) 1982-10-28
CH617815GA3 (de) 1980-06-30
EP0008832B1 (de) 1982-09-01
US4259735A (en) 1981-03-31

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