EP1783567A2 - Uhrwerk eines Chronographen - Google Patents

Uhrwerk eines Chronographen Download PDF

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Publication number
EP1783567A2
EP1783567A2 EP06123371A EP06123371A EP1783567A2 EP 1783567 A2 EP1783567 A2 EP 1783567A2 EP 06123371 A EP06123371 A EP 06123371A EP 06123371 A EP06123371 A EP 06123371A EP 1783567 A2 EP1783567 A2 EP 1783567A2
Authority
EP
European Patent Office
Prior art keywords
counter
state
lever
wheel
blocker
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.)
Withdrawn
Application number
EP06123371A
Other languages
English (en)
French (fr)
Other versions
EP1783567A3 (de
Inventor
Andreas Strehler
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.)
Maurice Lacroix SA
Original Assignee
Maurice Lacroix SA
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 Maurice Lacroix SA filed Critical Maurice Lacroix SA
Publication of EP1783567A2 publication Critical patent/EP1783567A2/de
Publication of EP1783567A3 publication Critical patent/EP1783567A3/de
Withdrawn legal-status Critical Current

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Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04FTIME-INTERVAL MEASURING
    • G04F7/00Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0823Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
    • G04F7/0828Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement acting in the plane of the movement
    • GPHYSICS
    • G04HOROLOGY
    • G04FTIME-INTERVAL MEASURING
    • G04F7/00Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0804Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • G04F7/0814Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with double hammer, i.e. one hammer acts on two counters
    • GPHYSICS
    • G04HOROLOGY
    • G04FTIME-INTERVAL MEASURING
    • G04F7/00Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0842Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G04F7/0847Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with column wheel

Definitions

  • resetting means of the seconds counter comprising at least one mobile resetting element intended to be displaced by a second control member, at least between a first position, rest, and a second position, active, the movable reset element being configured to act on the second counter in the second active position.
  • the mobile resetting element is generally made in the form of a hammer cooperating with a heart-shaped cam integral with the seconds counter.
  • the chronograph movement comprises a control lever moved under the influence of a control member outside and acting on a rotary control element to start or stop the measurement of time.
  • the reset hammer is moved in contact with the corresponding core under the effect of an action exerted on an external push reset.
  • the reset hammer then remains in abutment against the heart, in its rest position, as long as a new start of the chronograph is not controlled, in order to maintain the indicator needle of the measured time in its initial position.
  • the return of the hammer in its raised or armed position, to release the indicator needle is caused by an action on the control lever whose main purpose is to start the measurement of a time.
  • the rotary control element typically has a projecting region brought into contact with a portion of the hammer and causing the rotation of the latter to bring it back to its armed position. .
  • the locking means are in the form of a blocker pivotally mounted on the movement and actuated by the rotary control element.
  • the blocker has a bearing surface acting directly on the seconds counter to prevent rotation of the latter.
  • the reset hammer when actuated, it is necessary to clear the bearing surface of the blocker seconds counter when returning the latter to its initial position.
  • the hammer has a pin for acting directly on the blocker to lift the counter seconds.
  • the present invention is intended in particular to improve the solutions of the above-mentioned prior art by proposing a chronograph movement the structure of which makes it possible to increase the accuracy of the adjustments involved in the relative positioning of the resetting means, clutch means and locking means, while providing a relatively simple structure.
  • the invention relates to a chronograph movement of the type indicated above, characterized in that it further comprises a movable release lever intended to be moved by the second control member from a first position of rest to a second active position in which it acts on the selective blocking means to release the seconds counter. Returning means are also provided for moving the release lever to its rest position in response to the cessation of the action of the second control member.
  • FIG. 1a shows a simplified top view of the chronograph movement according to a preferred embodiment of the present invention, in a first configuration
  • Figure 1b shows a perspective view of a particular constituent element of the movement shown in Figure 1a;
  • FIG. 2 is a view similar to that of Figure 1a, showing the chronograph movement in a second configuration
  • FIG. 3 is a view similar to that of FIG. 1a, showing the chronograph movement in a third configuration
  • Figure 4 is a view similar to that of Figure 1a, showing the chronograph movement in a fourth configuration.
  • the chronograph function watch movement according to the present invention is intended to be arranged in an analog display chronograph watch (not shown) of conventional type.
  • Such a watch includes in particular at least one display unit of a unit of measured time intervals, generally seconds.
  • the watch movement comprises a counter of minutes to drive a display member minutes measured, in a manner known in the state of the art, in addition to a seconds counter for driving the display member seconds measured.
  • FIGS 1a to 4 show, in a simplified manner, constituent elements of the watch movement according to the present invention involved in the implementation of the chronograph function. Only the elements of the watch movement essential to understanding the invention have been represented for the sake of clarity.
  • the position of certain components is sometimes defined with reference to a time.
  • This position corresponds to the position of the index displaying the given time on a conventional dial. Note that in the figures representing the movement, it has been represented by its bottom side, that is to say with the side with the dial disposed at the back, so not visible. In addition, the twelve o'clock position is at the bottom of the figures, while the six o'clock position is at the top.
  • a peripheral portion of the plate 1 of the movement has been schematized in its region intended to be disposed in the bottom of the corresponding timepiece, substantially between the 2 o'clock and 9 o'clock positions.
  • platinum is used in the remainder of the text without limitation, since the construction of the movement can be modular without departing from the scope of the present invention.
  • the "platinum” can be that of the basic movement, that of a module, or a bridge, possibly of type 3 ⁇ 4.
  • a time-setting rod 2 of conventional type has been schematized in the 3 o'clock position.
  • a control lever 3 is arranged to be actuated by an external control member (not shown). More specifically, the lever 3 has a pivot-type connection with the plate 1 and follows a rotational movement relative to the plate in response to a pressure exerted on the external control member. The pivot type connection is ensured by a span screw 4 screwed into a hole (not shown) of the plate.
  • the control lever 3 is intended to activate or deactivate the chronograph function of the movement according to the present invention.
  • the control lever carries a hook 5 at its end opposite to that disposed opposite the external control member.
  • the hook 5 is arranged to cooperate with a rotary control element, more precisely with the ratchet 6 of a column wheel 7, rotatably mounted on the plate 1 by a screw bearing 8, around the position 7 hours.
  • the column wheel 7 is of the two-stroke type, ie each pressure on the external control member acting on the control lever 3 causes the column wheel to rotate by half a step.
  • the angular position of the column wheel 7 is stabilized by the action of a jumper 9 on the ratchet 6.
  • the movement represented in FIG. 1a comprises a chronograph driving wheel 10, a chronograph mobile 11 and a minute counter mobile 12.
  • the holding and positioning of these two mobiles are ensured by a chronograph bridge 13.
  • a clutch rocker system 14 is also movably mounted on the plate 1 to ensure the transmission of the movement of the driving wheel 10 to the chronograph mobile 11 in its engaged position.
  • the clutch system is shown in its disengaged position in Figure 1a.
  • the clutch rocker system 14 comprises a first arm 15, substantially straight, rotatably mounted on the plate 1 by means of an eccentric 16.
  • a bridge 19 shorter than the second arm 17 and covering partially is connected thereto by a screw 20.
  • the relative positioning in rotation of the second arm and the bridge is ensured by a pin (not visible), driven into their respective ends located on the side first arm 15, through an oblong opening (not visible) of the latter.
  • the second end of the bridge 19 carries a stone 21 which, in connection with an additional stone carried by the second arm 17, ensures the establishment of the pivot of the clutch wheel.
  • the free end of the first arm 15 has a spout 22 arranged to cooperate with the columns of the column wheel 7, while a spring 23 secured to the plate exerts on the first arm a pressure tending to the move closer to the column wheel 7.
  • two nails 24 arranged on the plate 1 make it possible to guide the second arm 17 of the clutch rocker system 14 during its movements, in a direction substantially parallel to the general plane of the plate.
  • the eccentrics 16 and 18 are arranged to allow a precise adjustment of the positions of the arms of the clutch system 14.
  • the chronograph mobile 11, or seconds counter carries a heart-shaped reset cam 25 and a drive finger 26 of a wheel 27, or inter-counter wheel.
  • the wheel of the player 27 meshes with the wheel of the minute counter 12, the latter being, for example, integral with a pointer indicator minute minutes (not shown), and also carrying a heart-shaped reset cam 28 .
  • a jumper 29 minutes counter guarantees the stability of the corresponding wheel between two successive jumps, in a known manner.
  • the hammer 30 has two end surfaces intended cooperating respectively with the hearts 25 and 28 of the seconds and minutes counters to replace the latter in their positions corresponding to a zero measured time.
  • the hammer 30 has a spout 32 intended to interact with the columns of the column wheel 7, to hold the hammer in its raised position, or to rest, or to raise it from its lower position, in a manner known in the state of the art.
  • Figure 1a shows the hammer in its lower position, when its end surfaces are arranged in abutment against the hearts of the seconds and minutes counters.
  • the hammer 30 has an ear 33 arranged to be pressed by a reset lever 34, as will be explained later in connection with the detailed description of the following figures, in particular of FIG. 4.
  • the lug 33 carries a pin 35 adapted to cooperate with a recess 36 of a hammer spring 37 mounted on the chronograph bridge 13 and forming a notch for the function of resetting and maintaining the hammer.
  • a blocker 40 rotatably mounted on the plate 1 by means of a bearing screw 41, has a spout 42, in the region of its end located near the column wheel 7 while its opposite end portion carries a surface contact 43 of complementary shape to that of the wheel of the seconds counter 10.
  • the spout 42 is intended to cooperate with the columns of the column wheel 7, in particular under the effect of a spring 44 exerting a force on the blocker Directed towards the column wheel 7.
  • the spout 42 is supported - or not - on a column and, consequently, the bearing surface 43 is away from - or disposed against - the counter of seconds counter 11.
  • the clockwork according to the present preferred embodiment of the invention further comprises a release lever 45 pivotally mounted on the plate 1, more particularly on the pin 31.
  • Figure 1b shows the release lever 45 in a perspective view to detail the main features. From its base, comprising an opening 46 by which it pivots on the pin 31, the release lever 45 comprises two arms 47 and 48 curved and, extending in a first time in substantially parallel directions, before s' to move away from each other. The respective free ends of the two arms finally extend in opposite directions.
  • the free end of the first arm 47 has a bearing surface 49 whose function will be explained later in connection with the detailed description of FIG. 4.
  • the free end of the second arm 48 has a rounded shape defining a receiving zone 50 intended to cooperate with the reset lever 34 as shown in Figure 1a.
  • the release lever 45 also comprises a locking nose 51, formed between its base and the first arm 47, capable of interacting with the columns of the column wheel 7.
  • a spring 52 is provided for exerting pressure against the second arm 48 of the release lever 45 tending to keep it in its position close to the reset lever 34.
  • Figure 1a shows the configuration of the watch movement according to a preferred embodiment of the present invention when its chronograph function is not active. Note in this figure that not only is the hammer 30 in its lowered position against the counters 25 and 28 of the counters 11 and 12 in a conventional manner, but the blocker 40 is also in its lowered position, its contact surface 43 being arranged against the wheel of the seconds counter 11.
  • the clutch rocker system 14 transmits the rotation of the driving wheel 10 to the seconds counter 11 immediately after the hammer 30 and the blocker 40 have been raised.
  • the hammer 30 is retained notched in its raised position by the cooperation of its pin 35 with the recess 36 of the spring 37 hammer.
  • the seconds counter 11 controls a display member arranged to indicate the second measured and causes the minute counter 12, via the finger 26 and the wheel of the player 27, to display the minute measured. As long as no new action is implemented on the movement, its operation continues in a conventional way.
  • This feature provides greater flexibility in the manufacture of the hammer 30 in the movements of the state of the art, especially in terms of tolerances.
  • the question of locking the reset lever can indeed be completely decoupled from the realization of the hammer and be adjusted directly to the design of the release lever.
  • a new pressure on the external control member at 2 o'clock activates the control lever 3 which causes a rotation of the column wheel an additional half step in the clockwise direction.
  • the corresponding configuration of the movement is that shown in FIG.
  • the time measurement is then interrupted and the watch movement is in a STOP configuration.
  • the rounded end 50 of the release lever 45 is disposed opposite the reset lever 34.
  • the reset lever 34 when the reset lever 34 is depressed in direction of the interior of the watch movement, it also exerts pressure on the end 50 of the release lever 45 causing the rotation thereof around the post 31.
  • the movement of the release lever opposes the restoring force of the 52 which tends to bring it back to its position shown in Figure 3, as previously exposed. It will thus be understood that the representation of FIG. 4 corresponds to a situation in which the pressure on the external reset member is maintained, the reset lever 34 remaining in its depressed position towards the inside of the watch movement.
  • the blocker has a slight recess 61 formed in its flank opposite its contact surface 43, near the end opposite the spout 42.
  • the wheel of the player 27 is mounted on a bridge 62, conventionally, the latter being rotatably mounted on the plate and undergoing the force of a spring (not referenced) tending to keep the wheel of the player 27 within range of his drive finger 26.
  • the recess 61 is arranged opposite the free end of the walkman bridge 62 and, more particularly in FIG. 4, that when the release lever raises the blocker 40, it acts on the bridge 62 player, through its recess 61, to clear the wheel of the player of the trajectory of his drive finger.
  • the drive finger 26 can thus be made very simply and does not need to be retractable, for the purposes of the reset operation, as in some devices known in the state of the art.
  • the hammer comprises an arm, arranged to cooperate with a pin of the player, to lift the latter during its descent to the hearts reset.
  • the proposed solution according to this preferred embodiment of the invention provides a decoupling of the reset functions, on the one hand, specific to the hammer, and disengagement of the wheel of the player 27, on the other hand, provided here by the blocker.
  • the reset lever 34 resumes its rest position, which is that shown in FIG. 1, because of the force exerted by the return spring 52, by means of the release lever 45.
  • the hammer 30 remains in its low position, with its bearing surfaces disposed in contact with the cores 25 and 28, to ensure the positioning of the seconds counters 11 and minutes 12 to zero during periods of inactivity of the chronograph.
  • the hammer spring 37 is also arranged to exert pressure on the hammer, tending to keep it in contact with the hearts.
  • the spring 52 acts on the release lever 45 to bring it back into its raised position, as shown in FIG. 1.
  • the latter is rotated in the clockwise direction under the effect of its spring 44, until its contact surface 43 is in abutment against the wheel of the seconds counter 11, its spout 42 then being housed in a space between two columns of the 7.
  • Such a configuration of the blocker also corresponds to the representation of FIG. 1.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
EP06123371A 2005-11-07 2006-11-02 Uhrwerk eines Chronographen Withdrawn EP1783567A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01780/05A CH698758B1 (fr) 2005-11-07 2005-11-07 Mouvement de chronographe.

Publications (2)

Publication Number Publication Date
EP1783567A2 true EP1783567A2 (de) 2007-05-09
EP1783567A3 EP1783567A3 (de) 2008-07-02

Family

ID=37776476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06123371A Withdrawn EP1783567A3 (de) 2005-11-07 2006-11-02 Uhrwerk eines Chronographen

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EP (1) EP1783567A3 (de)
CH (1) CH698758B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH228246A (fr) * 1942-11-03 1943-08-15 Longines Montres Comp D Mouvement de montre à chronographe-compteur, heures et minutes.
GB609437A (en) * 1945-03-19 1948-09-30 Willi Adolf Buechler Improvements in or relating to chronographs
FR2504700A1 (fr) * 1981-04-23 1982-10-29 Dodane Precia Gete Montres Systeme de commande d'une roue d'entrainement en rotation d'une aiguille de chronographe
EP1310840A1 (de) * 2001-11-09 2003-05-14 Manufacture Roger Dubuis S.A. Mechanisch angetriebene Uhr, verbunden mit einem Chronograph

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH228246A (fr) * 1942-11-03 1943-08-15 Longines Montres Comp D Mouvement de montre à chronographe-compteur, heures et minutes.
GB609437A (en) * 1945-03-19 1948-09-30 Willi Adolf Buechler Improvements in or relating to chronographs
FR2504700A1 (fr) * 1981-04-23 1982-10-29 Dodane Precia Gete Montres Systeme de commande d'une roue d'entrainement en rotation d'une aiguille de chronographe
EP1310840A1 (de) * 2001-11-09 2003-05-14 Manufacture Roger Dubuis S.A. Mechanisch angetriebene Uhr, verbunden mit einem Chronograph

Also Published As

Publication number Publication date
CH698758B1 (fr) 2009-10-15
EP1783567A3 (de) 2008-07-02

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