EP1818735A1 - Uhrwerk für mechanische Uhr mit springender Sekunde - Google Patents

Uhrwerk für mechanische Uhr mit springender Sekunde Download PDF

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Publication number
EP1818735A1
EP1818735A1 EP06101683A EP06101683A EP1818735A1 EP 1818735 A1 EP1818735 A1 EP 1818735A1 EP 06101683 A EP06101683 A EP 06101683A EP 06101683 A EP06101683 A EP 06101683A EP 1818735 A1 EP1818735 A1 EP 1818735A1
Authority
EP
European Patent Office
Prior art keywords
dead
mobile
display
seconds
movement
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Withdrawn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
EP06101683A
Other languages
English (en)
French (fr)
Inventor
Laurent Besse
Patrick Lete
Xavier Dal Ponte
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.)
Harry Winston Ultimate Timepiece SA
Original Assignee
Harry Winston Ultimate Timepiece 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 Harry Winston Ultimate Timepiece SA filed Critical Harry Winston Ultimate Timepiece SA
Priority to EP06101683A priority Critical patent/EP1818735A1/de
Publication of EP1818735A1 publication Critical patent/EP1818735A1/de
Withdrawn legal-status Critical Current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
    • G04B13/00—Gearwork
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement

Definitions

  • the present invention relates to a movement, for mechanical timepiece to second dead, comprising a frame carrying a finishing gear.
  • the latter comprises in particular a mobile second secured to a drive wheel of a second dead mobile rotatably mounted on the frame.
  • the dead second mobile is intended to control a display member of n successive dead seconds, the drive wheel and the dead second mobile cooperating through elastic means.
  • the purpose of the present invention is to propose an alternative to the dead-second display movements known from the prior art, in particular by proposing a technical solution allowing the watchmaker to have greater freedom in the production of parts with a strong distinctive character by displaying any number of seconds dead at each minute.
  • the invention relates to a movement of the type described above, characterized in that the elastic means comprise at least one series of n deformable elastic elements integral in rotation with the second mobile and arranged to cooperate successively with the mobile second dead to exert on the latter a force tending to rotate in a predefined direction of rotation.
  • This movement further comprises retaining means arranged to cooperate with the dead second mobile to prevent it from rotating while one of the elastic members is charged by cooperating with the second dead mobile, and to release it when the elastic member i reaches a predefined load level, therefore of deformation.
  • the second dead mobile when the second dead mobile is released, it turns at an angle corresponding to the display of the next second dead before being locked again.
  • the movement can be easily adapted to allow the display of any number of seconds dead per minute, without requiring the implementation of a complete new development from the manufacturer.
  • Another object of the present invention is to propose a movement of the type indicated above allowing the display of a number n of dead seconds per minute, in a retrograde manner.
  • the elastic means comprise the same number n of elastic deformable members, the dead second mobile comprising elastic return means tending to return it to a predefined rest position when, for a given turn of the drive wheel, the n dead seconds were displayed.
  • the present invention also relates to a timepiece in which the movement above is implemented.
  • the timepiece comprises in particular a dial having a window for displaying information related to the date.
  • This piece advantageously comprises a display member of n seconds dead per minute from covering the display member of the date in the window for n seconds before withdrawing from the window to make visible again the display of the date.
  • FIG. 1 shows a schematic top view of a timepiece in which the movement according to a preferred embodiment is implemented
  • FIG. 2 represents a perspective view of part of the movement according to the embodiment shown in FIG. 1, and
  • FIG. 3a and 3b show perspective views of the control mechanism of the display of n seconds dead according to the embodiment shown in Figure 1, in two successive respective positions. Mode (s) of realization of the invention
  • FIG. 1 represents a timepiece 1 whose display is controlled by a movement according to a preferred embodiment of the invention.
  • This timepiece represented by way of non-limiting indicative, has an aesthetic and display means exclusive hourly information.
  • the hourly information is displayed by means of discs, a portion of each of which is visible through a corresponding counter located directly in box 2 of the timepiece.
  • the counters 3 and 4 are used to display, respectively, the tens and the hours units, the counters 5 and 6 to the display of the tens and minutes units, and the counters 7 and 8 to the displaying dozens and date units.
  • a display member for the second 9, appearing inside the window 7 for indicating the ten or so dates By way of example, it can be provided that the last four seconds of each minute are displayed in the window 7 by a jumping type display, that is to say by displaying the second dead.
  • the timepiece 1 has horns 10 for connecting the box 2 to a bracelet and a control member 11 having a mechanical connection with the movement to allow time setting and reassembly.
  • FIG. 2 represents, in a simplified perspective view, a part of the watch movement controlling the display members described with reference to FIG. 1 according to a preferred embodiment of the present invention.
  • the movement stage normally located on the top of the movement in the view of FIG. 2, has not been shown in this figure for the sake of clarity.
  • the movement shown comprises two barrels 20 housing barrel springs (not visible) to ensure the timepiece a comfortable power reserve and significant torque.
  • the barrels are covered by a bridge of barrels 21.
  • the energy stored in the barrels is transmitted to the display members by means of a finishing gear 22, with conventional operation.
  • This gear is engaged with the barrels by a mobile of medium 23.
  • the wheel of medium 24 meshes with the average gear (not visible), secured to the shaft 25 of the average wheel bearing the wheel 26.
  • the latter is engaged with the second pinion 27 of the second wheel 28 whose wheel meshes with the exhaust pinion 29.
  • the latter is integral with the escapement wheel 30 carrying the escape wheel 31.
  • the escapement wheel 31 cooperates with an anchor 32 making it possible to maintain the oscillations of a balance spring 33 pivotally mounted, in particular in a cock 34.
  • the exhaust makes it possible to regulate, in particular, the speed of rotation of the second wheel 28 so that it performs one revolution per minute.
  • the second mobile 28 further comprises a drive wheel 35, integral in rotation with its shaft and, cooperating with a cam 36 for controlling a minute display device, which will not be described in more detail in the measure where the implementation of the present invention is independent of this display device.
  • the second mobile 28 cooperates with a second dead mobile 37 pivotally mounted in the plate of the movement, by means of a shaft 38, as will be apparent from Figures 3a and 3b.
  • the second dead mobile 37 comprises a board 39, integral in rotation with the shaft 38, having two portions 40 and 41 disposed on either side of the shaft.
  • a first portion 40 comprises two curved arms 42 carrying, between their respective distal ends, a support 43 substantially shaped ring portion.
  • the support 43 carries five pins 44 extending in the direction of the plate, the function of which will be explained later, regularly spaced between the two arms 42 and situated at respective similar distances from the shaft 38. It appears from FIG. that, when following the support 43 in the clockwise direction, the pins 44 have a decreasing length.
  • the second portion 41 of the board has a smaller footprint than the first portion and carries a counterweight 45.
  • the shaft 38 carries a toothing 46 adjacent to the board 39 and extending over only a portion of the periphery of the shaft.
  • a return spring 47 is disposed around the shaft 38, between the toothing 46 and the plate of the movement.
  • a first end (not visible) of the return spring 47 is arranged to bear against the plate while its second end 48 bears against a tooth 49 of the toothing 46.
  • the return spring 47 is intended to exert a force restoring on the mobile second dead 37 tending to rotate in the direction of clockwise rotation in the view of Figure 2.
  • FIGS. 3a and 3b show top views of a detail of the movement of FIG. 2, in the region of second 28 and second seconds mobiles 37, making it possible to more precisely expose the operation of the display of the second mentioned in connection with the description of Figure 1.
  • the plate 50 of the movement is visible in these figures to hide the elements of the finishing train 22 which have just been described, for the sake of clarity.
  • FIGS. 3a and 3b correspond to two configurations of the movement, temporally separated from one another by a duration of approximately one second.
  • the drive wheel 35 carries resilient means for cooperating with the toothing 46 of the second dead mobile. More specifically, these resilient means comprise four straight springs 51 extending in substantially radial directions from a common base 52, integral with the moving second mobile. The length of these upright springs is such that their free ends are capable of interacting each with a given tooth 49 of the toothing 46, in different respective angular positions of the second dead mobile 37.
  • the toothing 46 comprises four teeth 49.
  • a first right spring 51 is placed in abutment on a first tooth 49 of the dead second mobile 37, the second mobile being driven in the direction of clockwise rotation by the finishing train 22, such as described in connection with FIG.
  • the right spring 51 exerts a pressure on the dead second movable tending to rotate it in the anti-clockwise direction, or against the force exerted by the return spring 47.
  • the drive wheel carries retaining elements of the second mobile 37 to prevent it from rotating freely.
  • These retaining means comprise a plurality of stops, arranged in a stack 53 forming a staircase on the drive wheel, according to the preferred embodiment of the present invention.
  • Each of the stops has the shape of a disk portion whose periphery is extended by a rigid finger 54 to 58 curved and extending rearwardly with reference to the direction of rotation of the drive wheel.
  • the first pin 44 is disposed against the rigid finger 54, preventing rotation of the dead second mobile 37 in the counterclockwise direction.
  • the first right spring is always located near the first tooth 49 of the dead second mobile. However, the second right spring 51 is then placed in abutment against the second tooth 49 to exert, via the latter, the greater part of the force intended to drive the moving second dead in an anti-rotational movement. schedule.
  • the second dead mobile 37 remains stationary in this position for one second, until the drive wheel 35 has rotated by a sufficient angle to allow the release of the second pin 44 of the second rigid finger 55.
  • the right spring 51 is deformed and the release of the second pin 44 allows the rotation the dead second mobile, simultaneously with the discharge of the right spring 51, until the third pin 44 abuts against the third rigid finger 56.
  • the third right spring 51 comes into contact with the third tooth 49 of the second dead mobile to actuate the operation of the display of the next second dead.
  • the fourth right spring 51 After the passage of the third right spring 51 on the toothing 46, the fourth right spring 51 in turn transmits an impulse on the mobile second dead. At this moment, the latter performs a rotation movement in the counterclockwise direction, as well as in the previous seconds, until the fifth pin 44 abuts against the fifth rigid finger 58.
  • An eccentric 59 is provided on the plate 50 to define a rest position of the second dead mobile, while allowing a watchmaker to make an adjustment of this rest position, if necessary.
  • n right springs 51 control the display of n successive dead seconds, n being equal to four in the example shown and described in a non-limiting manner.
  • the drive wheel 35 continues to rotate at the rate of the second mobile. It then elapsed an additional fifty-six seconds before the first right spring 51 comes back to abut against the first tooth 49, to start a cycle of four new seconds dead.
  • the shaft 38 of the second dead mobile 37 extends beyond the board 39, as shown in Figure 2.
  • a display member of the second dead (partially visible in Figure 1 , 9) having the shape of a disk portion is directly mounted on the shaft 38 to be rotated simultaneously to the mobile second dead.
  • this display member 9 of the second dead is located outside the window 7 for displaying the ten or so dates when the dead second mobile is in its position. rest.
  • each of the successive pulses exerted by the right springs has the effect of showing a different portion of the display member of the second dead in the window 7. It can be provided, at As an indication, this mechanism is adapted to successively display the seconds 56, 57, 58 and 59 at the end of each minute of the current time.
  • the second 59 is then displayed a brief moment which corresponds to the inertia of the dead second mobile, when the fifth pin 44 abuts against the fifth rigid finger 58, this inertia being in particular to be considered in relation to the latency required for the force exerted by the return spring 47 brings the mobile second dead to its rest position.
  • This inertia being in particular to be considered in relation to the latency required for the force exerted by the return spring 47 brings the mobile second dead to its rest position.
  • the shaft 38 carries a wheel or pinion driving an additional mobile controlling the displacement of the display member of the second dead, within the scope of the present invention.
  • the shaft 38 directly carries a display needle of the second dead moving against graduations carried by a dial.
  • the pins 44 are all disposed at respective different distances from the shaft 38, the positions and dimensions of the stops of the drive wheel being adapted accordingly.
  • the pins can all have the same length, while the rigid fingers can all be arranged in the same general plane.
  • the stops may alternatively be in the form of a toothing on the edge of the drive wheel, two teeth being spaced from each other by a window forming a passage for the pins during the movements of the second dead mobile .
  • the drive wheel has a toothing with triangular teeth actuating a trigger whose one end ensures the retention of the pins of the second dead mobile.
  • the release of the trigger would release a pin to allow the rotation of the mobile second dead, before the next pin is blocked by the trigger when the latter returns to contact with the teeth of the wheel drive.
  • the number n of dead seconds displayed may be different from four, and in particular equal to sixty in the case of the two variants.
  • the board 39 of the dead second mobile would then have the shape of a complete disc carrying sixty pins in the region of its periphery.
  • the return spring 47 would then no longer be useful.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
EP06101683A 2006-02-14 2006-02-14 Uhrwerk für mechanische Uhr mit springender Sekunde Withdrawn EP1818735A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06101683A EP1818735A1 (de) 2006-02-14 2006-02-14 Uhrwerk für mechanische Uhr mit springender Sekunde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06101683A EP1818735A1 (de) 2006-02-14 2006-02-14 Uhrwerk für mechanische Uhr mit springender Sekunde

Publications (1)

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EP1818735A1 true EP1818735A1 (de) 2007-08-15

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EP06101683A Withdrawn EP1818735A1 (de) 2006-02-14 2006-02-14 Uhrwerk für mechanische Uhr mit springender Sekunde

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2209145A3 (de) * 2009-01-14 2011-05-11 Seiko Epson Corporation Piezoelektrische Antriebsvorrichtung und elektronische Vorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH16827A (fr) * 1898-05-28 1899-02-15 Albert Wittnauer Mécanisme de seconde morte
US2591876A (en) 1949-07-01 1952-04-08 Ebauches Sa Dead-second watch mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH16827A (fr) * 1898-05-28 1899-02-15 Albert Wittnauer Mécanisme de seconde morte
US2591876A (en) 1949-07-01 1952-04-08 Ebauches Sa Dead-second watch mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2209145A3 (de) * 2009-01-14 2011-05-11 Seiko Epson Corporation Piezoelektrische Antriebsvorrichtung und elektronische Vorrichtung
US8189431B2 (en) 2009-01-14 2012-05-29 Seiko Epson Corporation Piezoelectric drive device and electronic device

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