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
  • G04B19/00—Indicating the time by visual means
  • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
  • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
  • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
  • G04B19/253—Driving or releasing mechanisms
  • G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
  • G04B19/25353—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement
  • G04B19/2536—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement automatically corrected at the end of months having less than 31 days

Definitions

• the present invention relates to a timepiece with a calendar with large format display and instantaneous jump comprising a gear train indicating the hour, a date mobile comprising a wheel of 31 teeth, a wheel of the units of 30 teeth plus a space corresponding to a tooth for the drive of a pinion of the units of 10 teeth and a wheel of four teeth for the drive of a pinion dozens of 4 teeth, an annual cam secured to a wheel of 12 teeth, and drive means connected to said time indicator train for driving said date mobile one turn per month and the annual cam one turn per year.
• watches comprising various indications derived from the time, such as the date (day, calendar, month), the phases of the moon, the indication of several time zones in particular.
• the subject of the present invention is a timepiece with calendar with large format display and instantaneous jump, as defined by claim 1.
• the calendar of this timepiece is a perpetual calendar and includes the display of days and months.
• this calendar also includes the indication of the phases of the moon which is coaxial with an additional train for the indication of a second time zone, driven by the main indicator train located in the center of the watch.
• this timepiece with calendar is intended to offer a clear display, easy to read, as well as regards the arrangement of the elements displayed only with regard to readability, thanks to sufficiently large characters. All the indications displayed change instantaneously and preferably do not require any correction, these being induced by the annual cam.
• Figure 1 is a plan view of this embodiment, in which it is assumed that the different indicator discs are transparent to allow to see the mechanism;
• Figure 2 is a plan view of the mechanism of Figure 1 without the indicator discs, showing the position of the various bodies on February 28 of a non-leap year around noon;
• Figure 3 is a view similar to Figure 2, showing the position of the various bodies just before midnight, so just before the date change;
• Figure 4 is a view similar to the preceding figure, showing the position of the various bodies on March 1, after date change;
• FIG. 5 is a sectional view along the line VV of FIG. 3.
• FIGS. 1 and 2 essentially show the calendar mechanism of the timepiece according to the present invention which comprises a drive wheel 1 secured to the cannon wheel or RC hour wheel, illustrated in the section of FIG. 5, meshing with a wheel 2 and which makes a turn in twelve hours.
• the relationship between this pinion 2 and the drive wheel 1 is 2/1, so that wheel 2 makes one revolution per day.
• This wheel 2 is secured to a cam 3 which works with a pin 4a secured to a rocker 4, pivotally mounted around an axis 4b.
• This rocker 4 is divided into two arms which each end in a pawl 5a, 5b for the step-by-step drive of a date mobile 7 of 31 teeth, respectively for the step-by-step drive of a star 8 ( figure 1) of the days of the week.
• This rocker 4 has an opening in an arc 4c centered on its pivot axis 4b, in which a stop 4d is engaged.
• This lever 4 is pressed against one end of this opening 4c by a return spring 6 engaged with a pin 4th of the lever 4.
• a second lever 9, which constitutes a correction lever, is pivotally mounted around the same axis 4b as flip-flop 4. It is connected to the latter by an elastic arm 9a which bears against the ankle 4a of flip-flop 4, which projects on both sides of this flip-flop 4.
• the flip-flop 9 ends with a pawl 10 intended for selectively engaging with an offset 11a of a correction cam 11, integral with the date mobile 7.
• the runner 7 is still integral with two wheels, a drive wheel units 12, including 30 teeth and a gap corresponding to the 31 th tooth in engagement with a star 13 display units of dates, having 10 teeth.
• the second wheel integral with the mobile of the dates 7 is a tens drive wheel 14, comprising 4 teeth engaged with a star 15 for displaying the tens of dates.
• Each of these stars 13, 15 is respectively secured to an annular disc 13a concentric with a disc 15a (FIGS. 1 and 5), the annular disc the area 13a carrying the numbers of the units from 0 to 9 and the disk 15a carrying the numbers of the tens from 0 to 3, the zero can be replaced by an empty space.
• the date mobile 7 meshes in a 1/1 ratio with a wheel 16 secured to an instantaneous jump cam 17.
• a rocker 18 pivoting about an axis 18a is pressed against the instantaneous jump cam 17 by a spring 19.
• This rocker 18 carries a drive pawl 20 which is engaged with an annual mobile 21 of twelve teeth, secured to an annual cam 22 which comprises sectors of variable radii representative of the number of days in months of the year.
• a portion 22a of this annual cam 22 is secured to a satellite pinion 23 ( Figure 1) meshing with a sun wheel of the months 24 secured to the frame of the calendar mechanism.
• the gear ratio between the satellite pinion 23 and the sun wheel for months 24 is chosen so that this satellite pinion 23 makes one revolution for four turns of the sun wheel for months 24.
• the cam portion 22a has four sides, three of which are are at the same distance from the axis of the pinion 23, while the fourth is at a greater distance than the other three.
• the second flip-flop 9 comprises a feeler arm 9b intended to come into contact with the periphery of the annual cam at each movement of the flip-flops 4 and 9, that is to say once a day. Since the different portions of the annual cam 22 have different radii as a function of the length of the months, the amplitudes of the movements of the rocker 9 and of its pawl 10 vary and the differences between the different amplitudes are absorbed by the elastic arm 9a of the scale 9. As illustrated in Figure 1, the annual mobile 21 is integral with a disc 21a bearing the indications of the twelve months of the year.
• the date mobile 7 and the annual mobile 21 as well as the star of the units 13 and that of the tens 15 are angularly positioned by respective jumpers, 25, 26, 27, 28.
• One of the teeth of the annual mobile 21 has a thickness substantially greater than the eleven other teeth. Thanks to this thicker tooth, the annual mobile 21 drives a four-pointed star 29 by one step per year.
• This star is secured to a reference 30 which drives a train of references 31, 32, 33, the latter of which is secured to a four-pointed star 34 engaged with a jumper 35.
• This star 34 is also secured to a disc 34a (figure 1) bearing the numbers 1, 2, 3 and the letter B, for the indication of a cycle of four years including a leap year B.
• the star of the days of the week 8 (FIG. 1) is positioned by a jumper 41 and carries a disc 36 on which the days of the week are displayed.
• This star 8 with seven branches is engaged with a second star 37 also with seven branches positioned by a jumper 38.
• This second star 37 is integral with a pinion 39 (FIG. 1) which meshes with a reference 40 which meshes with a wheel 42 integral and coaxial with a wheel 43 which meshes with a wheel 44 for indicating the phases of the moon.
• the gear ratios of this gear train between the star of the days of week 8 and the wheel 44 for the indication of the phases of the moon are chosen so that the wheel 44 rotates in three lunar months, in so that this wheel 44 carries three circles 45 representative of the moon, distributed at 120 ° from one another on the wheel 44 so that each of them is used for the indication of a lunar cycle in combination with a window (not shown) of appropriate shape, formed through the dial C, to simulate the phases of growth and decay of the moon appearing in the window.
• a third wheel 46 pivots on the same axis as the wheels 42, 43 of the moon phase gear train. This third wheel 46 (FIG.
• the cam 3 secured to the calendar wheel 2 progressively raises the rockers 4 and 9 against the pressure exerted by the return spring 6 on the rocker 4.
• the pawls 5a, 5b are moved clockwise around the pivot axis 4b of the rockers 4, 9, thus emerging from the teeth 7 and 8 and the finger 9b of the rocker 9 more or less limits the pivot amplitude of this rocker 9 as a function of the part of the annual cam 22 which is in the trajectory of this finger 9b and against which this finger 9b abuts.
• the flip-flop 4 pivots relative to the correction flip-flop 9, this relative pivoting of this lever 4 relative to the lever 9 being absorbed by the deformation of the elastic arm 9a of this lever 9.
• the flip-flop 9 and its pawl 10 have no function, the pawl 10 sliding against the smooth surface of the correction cam 11 with each back and forth movement of the flip-flops 4 and 9.
• the pawl 10 engages behind the recess 11a of the correction cam 11, so that when the cam 3 releases the rockers 4 and 9 at the return force of the spring 6, the pawl 10 drives the cam correction 11 of the value of two steps of the date wheel 7, integral with this correction cam 11, passing the date from 30 to 01.
• the unit of the following calendar 01 does not change, only the ten changes. This is the reason why the date wheel 12 has 30 teeth and a space corresponding to a missing tooth.
• the missing tooth of the date wheel is located opposite the star of the units 13, so that it is not driven and that the number 1 is displayed two days consecutive. Only the tens star 15 is driven one step by the four-tooth tens wheel 14, causing the tens disc 15a to go from 3 to 0.

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

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Applications Claiming Priority (4)

Publications (2)

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Cited By (1)

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• 2002
  • 2002-03-28 EP EP02405246A patent/EP1349020A1/de not_active Withdrawn
• 2003
  • 2003-03-12 DE DE60327615T patent/DE60327615D1/de not_active Expired - Lifetime
  • 2003-03-12 JP JP2003580948A patent/JP4246641B2/ja not_active Expired - Fee Related
  • 2003-03-12 WO PCT/CH2003/000164 patent/WO2003083584A2/fr active Application Filing
  • 2003-03-12 AU AU2003206606A patent/AU2003206606A1/en not_active Abandoned
  • 2003-03-12 CN CNB038056496A patent/CN100419598C/zh not_active Expired - Fee Related
  • 2003-03-12 EP EP03704156A patent/EP1488290B1/de not_active Expired - Lifetime
• 2004
  • 2004-08-13 US US10/918,259 patent/US6912180B2/en not_active Expired - Fee Related
• 2005
  • 2005-12-20 HK HK05111769.1A patent/HK1079859A1/xx not_active IP Right Cessation

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