US3779001A - Date-indicating device for a calendar timepiece - Google Patents

Date-indicating device for a calendar timepiece Download PDF

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Publication number
US3779001A
US3779001A US00328122A US3779001DA US3779001A US 3779001 A US3779001 A US 3779001A US 00328122 A US00328122 A US 00328122A US 3779001D A US3779001D A US 3779001DA US 3779001 A US3779001 A US 3779001A
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United States
Prior art keywords
rings
teeth
link
ring
tooth
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Expired - Lifetime
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US00328122A
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English (en)
Inventor
H Kocher
P Schmidt
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.)
SSIH Management Services SA
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SSIH Management Services SA
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    • 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
    • G04B19/25366—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 manually corrected at the end of months having less than 31 days

Definitions

  • ABSTRACT Date-indicating device for a calendar timepiece comprising two concentric rings, the inner ring containing tens digits and the outer ring containing units digits, both rings driven in a rotary movement only or a rotary and translatory movement by driving elements on a linkage once each 24 hours.
  • the present invention relates to a date-indicating device for a calendar timepiece comprising two concentric indicator-rings the one bearing the units of the date, the other the tens.
  • the indication of the date is produced in a large number of calendar-watches by a ring coaxial to the movement, mounted on the plate, and bearing on 4 its upper face the dates from 1 to 3 l These indications appear one by one in a window of the dial.
  • this means of indicating is generally suitable only for relatively large-size wrist-watches.
  • the date-ring must have a certain diameter in order for the size of the figures to be large enough and to ensure easy reading.
  • the window is situated at the periphery of the dial, where it takes the place of one of the hour markers. Also there are great difficulties in producing small-size calendar-watches, especially those for ladies.
  • Calendar-watches are already known where it has been sought to remedy this shortcoming by placing the date indication on two concentric rings, one of them bearing the units and the other the tens. This arrangement makes it possible to leave theperiphery of the movement free and, consequently, to place the datereading window between the center of the movement and the hour-circle. It also makes it possible to produce ladies calendar-watches where the size of the figures shown is large enough to ensure easy reading.
  • timepieces contain a mechanism which selectively actuates one or the other of the rings, or both rings simultaneously, as the case may be.
  • the inner ring must be actuated by one step every time the outer ring has gone through a complete revolution.
  • FIG. 3 of the inner ring appears in the window, the two rings are ac tuated simultaneously. The result is that the mechanism which actuates these rings is relatively complicated and bulky. What is more, a correction is necessary at the end of each month.
  • the object of the present invention is to remedy that short-coming and to propose an indicating device of the type mentioned at the beginning which is simple enough in its construction to be incorporated in any watch at all.
  • the device according to the invention is characterized in that it includes a four-joint link system comprising a first link rotated around a fixed axis at the rate of one revolution every 24 hours, and further comprising a driving plate which constitutes the second link and which is actuated by the first link, said second link having two driving noses each cooperating with one of the rings while describing a closed curve when the first link turns around its axis.
  • FIG. 1 is a plan-view from above
  • FIG. 2 is a diagrammatic representation of the fourjoint link system which constitutes the essential part of the date-changing mechanism
  • FIG. 3 is a sectional view along line III-III of FIG. 1.
  • the drawing shows a wrist-watch movement of which the plate 1 can be seen.
  • Mounted on this plate is an assembly composed of two concentric rings 2, 3 the first provided with ten teeth 4a, 4b, etc., distributed along its outer rim, and the second provided with eight teeth 5a, 5b, etc., distributed along its inner rim.
  • These two rings are fitted one inside the other so as to be able to rotate with respect to one another. They lie at the bottom of a recess 6 contrived in the upper face of the plate, around its center. As can be seen in FIG. 1, this recess has a sort of curved flattened portion 6a which forms a banking, as will be noted later on.
  • Ring 2 bears on its upper face the units 14 of the date, from 0 to 9, each between two teeth 4, while the inner ring bears on its upper face eight tens figures 15, these being in the order 0, 0, I, l, 2, 2, 3, 3. Each of these figures is situated approximately opposite one of the teeth 5.
  • plate 1 has an arcshaped rib l6 inside recess 6. This rib is so placed as to be within toothing 5, on the same diameter as the one which passes through the center of banking 6a. This rib likewise forms a banking facing in the same direction as banking 6a.
  • the date-changing mechanism of the device de--' scribed firstly includes a 24-hour wheel 17 (FIG. 3), mounted on a fixed stud l8 projecting from the plate.
  • This stud is the tangible counterpart of the point M in FIG. 1.
  • Wheel 17 lies on an annular rib 19. It is rotated by means not shown in the drawing, in such a way as to complete one revolution every 24 hours. It bears an eccentric projection 20 which is the tangible counterpart of the point A in FIG. I and constitutes a joint between wheel 17 and a second link 21. Projection 20 therefore engages in a corresponding opening of second link 21.
  • Second link 21 constitutes the sole member of the date-changing mechanism described here. It is a metal plate, cut out and bent, which extends over plate 1. Its arm 22 passes under rings 2 and 3 so as to end in a flange in aperture 7. This flange extends upward so as to be able to enter the annular space through which the points of teeth 4 travel. Plate 21 includes a widened part having a profiled opening which, in turn, has a slit 24 of uniform width extending in an arc and a widened portion 25 through which the members bearing the hands are intended to pass.
  • Second link 21 is connected to the rest of the movement by, on the one hand, the linkage with wheel 17 and, on the other hand, the engagement ofa fixed stud 27 (point M in FIG. 1), integral with the plate, in slit 24.
  • this stud 27' has an annular shoulder, from which there extends a pivot which links jumper 9.-Thus this jumper extends above second link 21.
  • a dial 28 in which there is a window 29.
  • This window situated toward 3 oclock, is within the hour-circle and always allows a portion of each of the two rings 2 and 3 to appear or to be exact, a tens figure of ring 3 and a units figure 14 of ring 2.
  • the 10 teeth 4a, 4b, etc. eight are of the same length and will hereafter be called long teeth, whereas two others are shorter.
  • the short teeth are distributed one on each side of one of the long teeth. They are the teeth situated between the figures 6 and 7, on the one hand, and 8 and 9, on the other hand.
  • the teeth 5 of inner ring 3 six are short teeth, and the other two, next to one another, with one placed near one of the 0s and the other placed near one of the 1's, are long teeth.
  • the length of the long teeth is the same for both rings, and the same applies to the short teeth.
  • second link 21 constitutes a moving element ofa plane system of links with four joints, diagrammatically represented in FIG. 2.
  • This system includes, besides second link 21, a first link 30, which rotates around a fixed axis M,,, and a third link 31, pivoting around fixed point M and linked to second link 21 at point B.
  • first link M,,A rotates around its axis M
  • third link 31 oscillates, and the second link goes through a complex translatory and rotatory movement, so that its two points E and F describe the curves e and fshown in FIG. 2.
  • the first link turns clockwise, curve e is travelled by point E in the same direction, while curvefis travelled by point F in a counterclockwise direction.
  • FIG. 2 is equivalent to the structure shown in FIG. 1, although third link 31 is omitted and replaced by joint 27 and slit 24. Indeed, inasmuch as point M is fixed with respect to the plate, it is obvious that the whole ofthe points of second link 21 which may be situated above point M,, at any given moment when first link 30 is rotating around its axis are themselves situated on an are drawn on second link 21 and having point B as its center. Thus the embodiment described is indeed equivalent to the diagrammatical representation of FIG. 2.
  • the trajectory of nose 23, on the other hand, and more particularly of its point E, is such that this nose hooks into tooth 4a, so that the rotation of the first link turns ring 2 counterclockwise and brings the figure 4 up to window 29, while ring 3 remains stationary.
  • Long tooth 4b comes to rest on banking 6a and maintains the common center of the rings at point 01.
  • This movement is a mixed one and can be broken down into a translatory movement and a rotatory movement.
  • These portions of rings 2 and 3 which are situated on the longitudinal axis defined by bankings 6a and 16 mainly go through a translation, the amplitude of which is equal to the distance 01-02, but the position and the dimensions ofjumper 8 are so chosen that the movement undergone by the portions of rings 2 and 3 which appear in window 29 is solely a rotation. Hence the movement of the date indication within the window is practically unnoticeable.
  • the device described makes it possible to provide a relatively large space for the date indication, so that the window in the dial can be larger than the figures on the indicating rings.
  • This circumstance also contributes toward making the movement unnoticeable when the date 08" changes to the date 09.
  • this movement also recurs upon the change of other dates, as will be seen below.
  • Date-indicating device for a calendar timepiece comprising a support, a pair of concentric rings mounted for translatory and rotatory movement on said support, figures corresponding to the units of the date on one of said rings, figures corresponding to the tens of the date on the other ring, a plane system of links comprising a first link rotatably mounted on said support and a second link jointed to said first link and arranged to effect a translating and rotating movement when said first link rotates around its rotating center, and a pair of driving elements integral with said second link, said first link being driven by said timepiece at a rate of one revolution every 24 hours, and each of said elements being arranged to cooperate with one of said rings.
  • said inner ring toothing comprises six short teeth and two long teeth, said teeth being regularly distributed around the inner periphery of said ring, and the long teeth being situated to correspond to the consecutive figures 0i.
  • the outer ring comprises ten teeth regularly distributed along its outer periphery, said teeth comprising a first long tooth arranged between the figures 7 and 8, one short tooth on each side of said first long tooth, and seven other long teeth.
  • a device as claimed in claim 8 further comprising a pair of spring-loaded jumpers to hold each of said rings.
  • a device as claimed in claim 8 further comprising bankings to limit the translating displacements of said rings at a first and at a second end position, each of said toothings comprising at least one long and one short tooth, and said teeth being arranged in such a manner that when the rings are in the first end position,'

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US00328122A 1972-02-09 1973-01-30 Date-indicating device for a calendar timepiece Expired - Lifetime US3779001A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH182972A CH566041A (ja) 1972-02-09 1972-02-09

Publications (1)

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US3779001A true US3779001A (en) 1973-12-18

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US (1) US3779001A (ja)
JP (1) JPS5249982B2 (ja)
CH (2) CH182972A4 (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939645A (en) * 1973-08-09 1976-02-24 Eta A.G. Ebauches-Fabrik Calender timepiece movement comprising three indicators
GB2369897A (en) * 2000-12-06 2002-06-12 Souza Paul Gerard D Large date display mechanism for clocks & watches
US20030103416A1 (en) * 2001-11-30 2003-06-05 Jacques Gabathuler Timepiece date mechanism
GB2383143A (en) * 2001-12-12 2003-06-18 Souza Paul Gerard D Large date display mechanism
US20050088917A1 (en) * 2003-10-24 2005-04-28 Jean-Pierre Dalloz Date display for timepiece
US6958952B2 (en) * 2001-11-30 2005-10-25 Rolex Sa Method for forming a date indicator actuated by a clock movement and mechanism for implementing this method
US7023762B1 (en) * 2003-01-15 2006-04-04 Timex Group B.V. Date display assembly for an analog timepiece
US20100002545A1 (en) * 2008-07-02 2010-01-07 Seiko Epson Corporation Timepiece
CN101788783A (zh) * 2009-01-23 2010-07-28 精工电子有限公司 带日历机构的钟表

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH624534GA3 (ja) * 1979-04-04 1981-08-14
FR2847992B1 (fr) * 2002-12-02 2005-02-25 Technotime Holding S A Mecanisme d'affichage de quantieme pour une piece d'horlogerie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976672A (en) * 1955-10-21 1961-03-28 Geneva Sport Watch Ltd Timepiece with date indicator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976672A (en) * 1955-10-21 1961-03-28 Geneva Sport Watch Ltd Timepiece with date indicator

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939645A (en) * 1973-08-09 1976-02-24 Eta A.G. Ebauches-Fabrik Calender timepiece movement comprising three indicators
GB2369897A (en) * 2000-12-06 2002-06-12 Souza Paul Gerard D Large date display mechanism for clocks & watches
GB2369897B (en) * 2000-12-06 2002-11-06 Souza Paul Gerard D Large date display mechanism for clocks & watches
US6738316B2 (en) * 2001-11-30 2004-05-18 Rolex Sa Timepiece date mechanism
US20030103416A1 (en) * 2001-11-30 2003-06-05 Jacques Gabathuler Timepiece date mechanism
US6958952B2 (en) * 2001-11-30 2005-10-25 Rolex Sa Method for forming a date indicator actuated by a clock movement and mechanism for implementing this method
GB2383143A (en) * 2001-12-12 2003-06-18 Souza Paul Gerard D Large date display mechanism
GB2383143B (en) * 2001-12-12 2003-10-29 Souza Paul Gerard D Large date display mechanism
US7023762B1 (en) * 2003-01-15 2006-04-04 Timex Group B.V. Date display assembly for an analog timepiece
US20050088917A1 (en) * 2003-10-24 2005-04-28 Jean-Pierre Dalloz Date display for timepiece
US7355927B2 (en) * 2003-10-24 2008-04-08 Daniel Roth Et Gerald Genta Haute Horlogerie S.A. Date display for timepiece
US20100002545A1 (en) * 2008-07-02 2010-01-07 Seiko Epson Corporation Timepiece
US7859949B2 (en) * 2008-07-02 2010-12-28 Seiko Epson Corporation Timepiece
CN101788783A (zh) * 2009-01-23 2010-07-28 精工电子有限公司 带日历机构的钟表

Also Published As

Publication number Publication date
JPS4889765A (ja) 1973-11-22
CH566041A (ja) 1975-08-29
JPS5249982B2 (ja) 1977-12-21
CH182972A4 (ja) 1975-01-31

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