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
  • G04B13/007—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
  • G04B11/00—Click devices; Stop clicks; Clutches
  • G04B11/001—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power
  • G04B11/003—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power with friction member, e.g. with spring action
• • 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 present invention relates to a timepiece comprising a mechanism with two time zones.
• the time of one of the timezones is provided by means of a smaller size device which is difficult to read.
• a first object of the present invention is to overcome this disadvantage as well as others by proposing to simplify the display in a timepiece dual time zone and selectively indicate the time of one either of the two time zones by the same display.
• Timepieces have already been proposed in which the same display could selectively indicate two different pieces of information.
• Patent document CH 693'155 describes a watch display mechanism provided to be switched so as to display with the same needle at least a first and a second information different from the first. From the brief indications given by this document, it is understood that a heart integral with the planet wheel of a planet gear is provided for analogically storing the difference between the value of the first and the value of the second piece of information, while the first information (eg time) is displayed.
• a first input of the planetary gear is kinematically connected to the needle, while the second input is driven to represent the value of the second information.
• the angular position of the planet wheel, or differential output wheel in principle reflects the difference between the value taken by the second information and that indicated by the needle.
• the display mechanism is switched to the second information, the kinematic link between the first information and the needle is disengaged.
• a hammer is lowered against the heart, to rotate the heart and bring him and the planet wheel, in angular position "zero".
• the needle is kinematically connected to the planet gear, it is driven by it and moves to indicate the value taken by the second piece of information.
• the planet wheel is immobilized by the hammer.
• the movements of the second differential input wheel are therefore transmitted to the needle whose position evolves according to the value taken by the second piece of information.
• the kinematic link disengageable between the first information and the needle is constituted by a second core cooperating with a second hammer.
• the present invention therefore also aims to provide a timepiece comprising a mechanism capable of selectively indicating the time of one or the other of the two time zones by the same display, and which makes better use of the specificities of jet lag.
• the present invention relates to a timepiece such as a wristwatch which is in accordance with claim 1.
• a timepiece capable of indicating two time zones at the time. means of a single hour hand, this hand indicating the choice of the time of a first or second time zone, and passing successively from the indication of one of these hours to the other by the action of the wearer.
• FIG. 1 is a front view of the dial of the watch according to the invention in local time display mode
• FIG. 2 is a front view of the dial of the watch according to the invention in the display mode of the reference time;
• FIG. 3 is a side view of the switching mechanism between the local time and the reference time;
• FIG. 4 is a perspective view from above of the mechanism of FIG. 3;
• FIG. 5 is a perspective view from above of the portion of the push mechanism that controls the display of the reference time;
• FIG. 6 is a perspective view from above of the portion of the push mechanism that controls the display of the local time;
• - Figure 7 is a perspective view from above which would be identical to that of Figure 6, if some wheels had been omitted to leave even elements that are masked in Figure 6;
• FIG. 8 is a perspective view from above of the mechanism making it possible to modify the time difference between the local time and the reference time;
• - Figure 9 is a perspective view from above which would be identical to that of Figure 8, if some parts omitted in Figure 8, had not been added;
• FIG. 10 is a perspective view from above of the differential gear provided for driving the hour hand and the date;
• FIG. 1 1 is a perspective view from above of the gear of Figure 10, some wheels have been omitted to show elements that are masked in Figure 10;
• Figure 12 is a plan view of an asymmetrical heart that may be used in a variation of the present invention.
• L local time, or time zone
• H reference time
• FIG. 1 illustrates the display of the local time "L” by the display means of the timepiece of the present example.
• Figure 2 illustrates the display of a reference time "H" by the same display means.
• These display means comprise a main dial (referred to as ⁇ ) above which a H hour hand and a minute hand are conventionally rotated.
• a date hand D rotates over a second smaller dial which is subdivided into 31 divisions to indicate the date.
• a third dial associated with a hand j / n making a turn in 24 hours is still planned to give an indication of the day or the night.
• a two-position needle (L and H) is used to indicate which of the local time or the reference time corresponds to the time displayed.
• the selection hand indicates the letter "L" indicating that the time displayed is the local time. So it's 7:08 in Los Angeles.
• the day / night hand d / n points to the beginning of the night. We can conclude that it is in fact 19h08.
• An additional needle D also linked to the hour hand IH indicates the date of 31.
• the hour hand H pivots in the clockwise direction and is placed on the fourth index 14 of the dial ⁇ (FIG. 2).
• the hour hand H drives the 9-hour day / night hand J / Q on the 24-hour dial.
• the day / night hand j / n will therefore be positioned on the indication of the end of the night of the dial. It is therefore easy to deduce that it is 4 am in Geneva.
• the date hand D also driven by the hour hand H will advance to the date corresponding to "1" since the hour hand H will have passed midnight. To return to the local time, it is sufficient to exert a new pressure on the pushbutton P_.
• FIGS. 3 and 4 show a particular embodiment of the mechanism that allows selection between two time zones in a timepiece according to the present invention.
• This mechanism comprises a core 18 which is designed to cooperate with one or the other of two levers 20 and 25.
• the core 18 is carried by an axis 17 (FIG. 3) which still carries a wheel 16 visible in FIG. 10 and hereinafter called the selector output wheel.
• the selector output wheel 16 is provided to drive the hour hand through a differential gear which will be described later in connection with FIGS. 10 and 11.
• the different gear ratios are chosen so that a half turn of the core 18, and therefore of the output wheel 16, corresponds to two turns (24 hours) performed by the hour hand.
• FIG. 5 makes it possible to understand in more detail the operation of one of the two levers provided for cooperating with the heart 18.
• the lever 20 is designed to pivot about an axis 23 whose one end is engaged in an opening in the board of a fixed wheel 19 (Figure 3).
• Figure 3 shows that lever 20 comprises a hammer arm (referenced 20 ") and a spout (referenced 20 '). 22.
• Figure 5 also shows that a spring 21 is provided to bias the lever 20 against the internal toothing 22 'of the ring 22.
• This ring is rotatably mounted on the cylindrical shoulder (not shown) of an annular flange 28 (visible in FIG.
• the ring 22 According to its angular position, the ring 22 presents alternately a tooth 22 'or a vacuum in the nose 20' of the lever 20.
• the nose 20 ' When the nose 20 'is facing one of the inner teeth, it pushes the lever, and thus lowers the hammer 20 ". The latter thus presses against the heart 18.
• the lever 25 is mounted to pivot about an axis whose one end is engaged in an opening of the plate of a wheel 24 ( Figure 3).
• the spout 25 'of the lever 25 encounters a tooth 27' of the selection ring 27, the hammer 25 "is forced against the heart 18, which has the effect of rotating the heart to take it to occupy a predetermined rest position relative to the hammer 25 ".
• the spring 26 can recall the lever 25 so as to lift the hammer 25 "and to release the heart 18.
• the positions of the two Selection rings 22 and 27 relative to the levers 20 and 25 are determined so that when the hammer 20 "is lowered, the hammer 25" is lifted, and vice versa, the control of the selection crowns 22 and 27 therefore constitutes what a two-step mechanism is called.
• the pivot 23 of the lever 20 is fixed, while the pivot of the lever 25 is integral with the plate of a moving wheel 24 (shown in FIG. 3) which is rotatably mounted on the axis 17. It will thus be understood that by turning the wheel 24, the angular offset between the lever 20 and the lever 25 can be varied.
• the heart 18 can be brought into one or the other of two angular positions, depending on whether it is the lever 20 or the lever 25 'which is active.
• the heart 18 is provided to drive the rotating hour hand.
• the display is controlled to indicate either the time of a first time zone or that of another time zone. schedule.
• reference time the time indicated by the needles when the lever 20 is active
• local time the time indicated by the needles when the lever 25 is active.
• FIG. 5 shows, in particular, a pusher 29, a column wheel (formed by the assembly of the coaxial elements 30, 32 and 35), and a jumper 31.
• the column wheel comprises a star 30 designed to cooperate with the pusher 29.
• the star 30 has twelve teeth, the column wheel rotates 30 ° (ie a twelfth of a turn) each time the pusher 29 is actuated.
• the column wheel also carries a toothed wheel 32 which is designed to drive the selection ring 22 via a gear wheel 33.
• the selection crown 22 advances in steps of 1/24 th of a turn.
• the internal toothing of the ring 22 has twelve teeth 22 'separated by as many voids.
• the ring 22 successively has a tooth, then a vacuum at the nose 20 'of the lever 20.
• the lever 20 therefore pushes the heart 18 in every other step.
• Figure 5 still shows a spring 34, which is provided to return the pusher 29 to its initial position when the user releases it.
• Figure 5 also shows a probe 36 which is biased by a spring 37 against the columns 35 of the column wheel.
• the probe 36 is mounted to pivot about an axis that is intended to carry the selection needle s ( Figures 1 and 2). The latter therefore indicates the display mode of the watch, based on the angular position of the column wheel.
• the function of the pusher 29 is not limited to advancing the selection ring 22. Indeed, as already said, when the lever 20 is actuated, the lever 25 must be released, and vice versa. Thus, when the selection crown 22 advances one step, the selection crown 27 must also advance one step.
• Figures 6 and 7 describe the drive mechanism of the selection ring 27.
• the drive of the selection ring 27 by the pusher 29 is through a differential control dif2, so as to preserve the possibility of move the ring 27 independently of the pusher 29 to change the time difference.
• the control differential comprises the wheels 46 and 42, the reference 47, the pinion 43 and the satellite mobile 44.
• the pinion 43 ( Figure 7), which is driven on the column wheel, is the first input of the differential.
• the wheel formed by the wheel 42 driven on the return 47 is a second differential input, coaxial with the first, which is left free in rotation.
• the satellite mobile 44 comprises a wheel and a pinion which mesh respectively with the pinion 43 and the reference 47.
• the satellite mobile 44 is rotatably mounted around a pin 45 driven into the wheel 46 of the board.
• the wheel 46 constitutes the differential output.
• the control mechanism associated with the pusher 29 includes an isolator flip-flop 40 provided to block the second differential input 42 when the pusher 29 is actuated. It can be seen in FIG. 6 that the isolator rocker 40 is controlled by a cam 39 integral with a control finger 38. It can also be seen that the control finger 38 is itself actuated by the pusher 29 via a pin 29 'driven on the pusher 29. When pressing the pusher 29, the cam 39 pivots and releases the isolator rocker 40 which, constrained by a spring 41, falls and blocks the differential input wheel 42. Continuing its travel, the pusher 29 advances by one step the star 30 (visible in FIG. 5), and thus also the differential input gear 43, thereby rotating the satellite mobile 44.
• both selection rings 22 and 27 can rotate synchronously in steps of 1/24 th lap, under the action of the plunger 29. once the pressure on the pusher 29 released, the latter resumes its place under the effect of the spring 34, and the pin 29 'returns the control finger 38.
• the cam 39 separates the isolator rocker 40 from the teeth of the wheel 42, releasing the latter.
• FIGS. 8 and 9 describe the mechanism provided for modifying the angular position of the lever 25 relative to the lever 20. This mechanism makes it possible to adjust the time difference between the reference time and the local time.
• the mechanism for adjusting the time difference comprises a lower flange 50 secured to the board (not shown) and which carries a star fixed to twelve teeth 49, and a shaft 48.
• a movable annular spring 53 is provided to cooperate with the Star 49.
• a wheel 51 and an upper flange 52 (FIG. 9) are rotatably mounted on the shaft 48.
• the wheel 51 meshes with the wheel 24, and it is integral with the upper flange 52 and the annular spring 53. bringing the winding stem (not shown) into the second pulled position T2, the wheel 51, and thus the upper flange 52 and the annular spring 53 can be rotated.
• the annular spring 53 being positioned by the star 49, the wheel 51 moves, under the action of the winding stem, in steps of 1/12 th of a turn. Since the gear ratio between the wheel 51 and the wheel 24 is 1/4, the wheel 24 moves in steps of 1/48 th of a revolution.
• the wheel 24 drives the lever 25, the return spring 26 and the selection ring 27.
• the lever 25 is constrained against the heart 18, the wheel 24 also drives the heart itself into its seat. rotation.
• the heart 18, when rotating causes the rotation of the hour wheel 8 via the selector output wheel 16.
• FIGs 10 and 1 1 describe the training of the display of the hour hands JH.
• the hour hand can be driven at the same time by the selector output wheel 16 and the movement of the watch. This is why, in the present example, the driving of the hour hand is through a differential gear (referenced dif1 in Figure 1 1).
• This differential gear comprises a first differential input mobile formed of a wheel 3 integral with a pinion 4 via the axis of the differential 3 ', and a second differential input wheel formed by a wheel 15 'and its pinion 6 which are rotatably mounted on the axis 3'.
• the gear also comprises a differential output wheel 7 which is rotatably mounted on the axis 3 ', and a satellite mobile 5 rotatably mounted around a pin g.
• the satellite mobile is composed of a wheel 5 'which meshes with the pinion 6 and a pinion 5' meshing with the pinion 4.
• an additional hour wheel 2 is driven on the hour wheel 1 of the movement.
• This wheel 2 meshes with the first input wheel 3 of the differential gear.
• the selector output wheel 16 meshes with the second input wheel 15 '.
• the input wheel 3 is integral with the differential gear 4
• the movement of the watch causes the moving satellite 5 to rotate through the pinion 4.
• the pinion 6 is integral with the wheel 15 ', it is usually blocked by the selector output wheel 16.
• it is the differential output wheel 7 which is rotated by the satellite mobile 5.
• the differential output wheel meshes with the wheel itself. with barrel 8, thus driving the hour hand JH.
• the different gear ratios are chosen so that two turns of the 8-wheel wheel correspond to one revolution of the differential output wheel 7.
• the wheel 7 thus performs one revolution per twenty-four hours.
• the embodiment which is the subject of this example also comprises a needle D provided for displaying the date.
• the needle D is integral in rotation with a date star 12 having 31 teeth.
• the date star 12 is held in the position corresponding to a date given by a calendar jumper 13, itself constrained by a calendar jumper spring 14.
• the differential output wheel 7 accomplishes a revolution in twenty-four hours.
• Fig. 10 still shows a day / night display wheel 10. This wheel is driven by the barrel wheel 8 via a return 9.
• the day / night display wheel 10 accomplishes a turn in 24 hours. and its axis carries the day / night needle J / Q.
• the control of the wheel 24 should also be adapted so that the wheel 24 moves in steps of 1/24 th of a lap rather than in steps of 1/48 th of a turn.
• This effect can be obtained for example by reducing the gear ratio between the wheel 51 and the wheel 24 to ⁇ A.
• the time difference is within an asymmetric interval extending from -1 h. at + 12h. or from - 12h to + 1 1 h.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Electromechanical Clocks (AREA)

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• 2007
  • 2007-04-03 DE DE602007007070T patent/DE602007007070D1/de active Active
  • 2007-04-03 EP EP07727745A patent/EP2008159B1/de active Active
  • 2007-04-03 WO PCT/EP2007/053274 patent/WO2007115984A2/fr not_active Ceased
  • 2007-04-03 AT AT07727745T patent/ATE470891T1/de not_active IP Right Cessation

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