WO2002084413A1 - Calendar date mechanism - Google Patents
Calendar date mechanism Download PDFInfo
- Publication number
- WO2002084413A1 WO2002084413A1 PCT/CH2002/000212 CH0200212W WO02084413A1 WO 2002084413 A1 WO2002084413 A1 WO 2002084413A1 CH 0200212 W CH0200212 W CH 0200212W WO 02084413 A1 WO02084413 A1 WO 02084413A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- indicator
- date
- month
- wheel
- thirty
- Prior art date
Links
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 date mechanisms for watches, of the type in which the date display device advances by one step per day, with the exception of the last days of the months which count less than thirty-one.
- the document CH 680 630 describes a perpetual mechanism which comprises a date wheel comprising, in superposition, three wheels having prominent teeth in variable number, defining how many jumps the date indicator must make. It is thus possible to remove the cams and the necks, but the volume occupied is important.
- the main object of the present invention is to propose a simple mechanism which consumes little energy, allowing automatic correction at least at the end of the thirty-day months.
- the mechanism according to the invention comprises, in a known manner: - a date wheel, driven in rotation by the movement of the watch and making one revolution in twenty-four hours,
- a date indicator provided with thirty-one teeth and controlled by the date drive, - a first kinematic link connecting, at the end of each day, the date wheel to the date indicator, to ensure the step of the latter,
- this mechanism is characterized in that it further comprises a third kinematic link, connecting the date wheel to the month indicator, at the end of months of less than thirty-one days, after that the second kinematic link ensured the training of one step of the month indicator, to ensure the training of at least one additional step of the month indicator and, by the second kinematic link, of the indicator date.
- the month indicator is divided into equal sectors on the basis of a sector for the months of thirty-one days and two sectors for the months of less than thirty-one days and comprises a wheel which comprises as many teeth as the indicator has sectors, this wheel being connected to the date wheel by the third kinematic link, and to the date indicator by the second kinematic link.
- the third kinematic link includes a finger secured to the date wheel and a cam secured to the month indicator which includes lugs cooperating with this finger, so that the latter causes an additional step, at the end of each month less than thirty-one days, the month indicator and, by via the second kinematic link, the date indicator, after the date wheel has blown off the date indicator by a first step and, via the second kinematic link, the month indicator.
- the second kinematic link thus thus links the date indicator to the month indicator when passing from thirty-one to the first for the months of thirty-one days and when changing from thirty to thirty-one for the months less thirty-one days. For months less than thirty-one days, this second link links the month indicator to the date indicator to change the date display from thirty-one to the first.
- This second link advantageously comprises first and second teeth, which are arranged on the date indicator, one of a first type, the other of a second type, and a reference of the months provided with a formed toothing. teeth of a third and fourth type, cooperating with the two teeth of the date indicator and in engagement with the wheel of the month indicator, the wheel of the month indicator and the reference having the same number of teeth.
- the teeth of the first, second, third and fourth types are arranged in such a way that the first type tooth drives the third type teeth only, while the second type tooth drives both the third and third teeth. fourth type when the second link links the date indicator to the month indicator.
- the month indicator is divided into equal sectors at the rate of one sector for the months of thirty-one days , two sectors for the thirty-day months and four sectors for the month of February.
- This indicator comprises a wheel which includes as many teeth as the indicator has sectors and which is connected to the date wheel by the third kinematic link, and to the date indicator by the second kinematic link.
- the third kinematic link comprises a toothed sector secured to the date wheel and a cam secured to the month indicator and comprising lugs arranged so that they cooperate with this sector so that the latter causes the month indicator to be one step after the date indicator has jumped from thirty to thirty-one when the displayed month has thirty days, and three steps in February, after the date indicator has jumped from the twenty - eight to twenty-nine.
- the movement comprises a plate 10 on which its other components are mounted.
- This plate is provided, in the center of its upper face, with a tube 12 on which a minute mobile 14, formed by a carriageway 14a and a wheel 14b, is mounted to rotate freely.
- a cannon wheel 16 is mounted on the roadway 14a and driven in rotation, at the rate of one revolution in twelve hours, by the minutes mobile 14, by means of a timer mobile not shown in the drawing.
- the date mechanism essentially comprises, mounted to rotate on the plate 10:
- an indicator for the months 22 in the form of a disc coaxial with the date indicator and the mobile 14, and bearing the name of the months, as well as -
- a return wheel 24 provided with a star toothing intended to kinematically connect the date indicators 20 and months 22, as will be explained below.
- the date driving wheel 18 is formed of a hub 25, a plate 26 provided with a peripheral toothing and two elastic fingers 28 and 30, arranged respectively on the upper and lower faces of the plate 26 and integral, by their rigid end, of the hub 25.
- the function of these fingers will be specified below.
- the date indicator 20 is formed by two coaxial and superimposed rings 32 and 34.
- the upper ring 32 carries the numbers of the date and, on the inner edge, two teeth 36 and 37 sweeping the space occupied by the teeth of the reference 24 , tooth 37, of a first type, being thinner than tooth 36 of a second type.
- the lower ring 34 comprises thirty-one teeth 38 distributed uniformly over its inner edge and intended to cooperate with the finger 30 of the wheel 18.
- the two rings are connected to each other by pillars 39, thus defining a space annular 40 open on the outer edge of the indicator 20.
- the month indicator 22 comprises, coaxial superimposed and rigidly assembled to each other, by means of screws, a board 44 provided with five lugs 46 arranged radially and cutting the path traveled by the finger 28, a star wheel 48 comprising ten -seven teeth, in engagement with the reference 24, and a disc 50 whose upper face is divided into seventeen equal sectors, each sector bearing an indication of months, those of thirty-one days appearing once and those of less than thirty-one days twice in a row, seventeen indications.
- the reference 24 comprises seven teeth 52, of a third type, which are thinned, and ten teeth 54, of a fourth type, extending over its entire thickness.
- This reference 24 cooperates with the date indicator 20 and, more particularly, with the teeth 36 and 37. More precisely, the thin teeth 52 are arranged so as to be driven by the tooth 36 only, the tooth 37 passing below them, while the thick teeth 54 are indifferently driven by teeth 36 and 37.
- the date mechanism further comprises jumpers which have not been shown in the drawing, in order to avoid overloading it, and which are intended to ensure, in a manner well known to those skilled in the art, the positioning of the date and month indicators, as well as reference 24.
- the date indicator 20 is rotated by the finger elastic 30, which cooperates with one of the teeth 38 of the ring 34.
- the reference 24 is arranged and arranged so that, at the end of the thirty-one month period, a thin tooth 52 is in the space swept by the teeth 36 and 37. When passing from thirty to thirty and one of the month, the thin tooth 37 passes below the thin tooth 52. There is therefore no interaction. At the end of the next day, the thick tooth 36 comes to bear against the thin tooth 52 and advances the reference 24 by one step, and, with it, the month indicator 22.
- a thick tooth 54 which is in the space swept by the teeth 36 and 37.
- the thin tooth 37 drives the thick tooth 54, which turns the reference 24 and the month indicator 22.
- the plate 44 of the latter is then arranged so that a lug 46 is located in the space swept by the finger 28. This finger 28 comes, within one hour, to bear against one of the lugs 46, which causes the month indicator to jump by an additional step and causes the return 24 and the date indicator 20 by engagement thick tooth 54 with thick tooth 36.
- the date and month indicators make two successive jumps when the month is changed, the date indicator thus passing from the thirty to the first.
- These two jumps are controlled by the driving wheel 18, the first by a first kinematic link formed by the finger 30 and the teeth 38, ensuring the driving of the date indicator 20, and of the month indicator 22 by a second kinematic link formed of the tooth 37, the reference 24 and the star 48.
- the second jump is controlled by a third kinematic link formed by the finger 28 and the board 44 by its lugs 46, ensuring the driving of the month indicator 22 and by the second kinematic link, but in the opposite direction at the first jump, the star 48 causing the return 24 which causes the date indicator 20 to jump via the tooth 36.
- the mechanism as described does not require a correction until the end of February.
- the date indicator 22 has nineteen sectors, one for the months of thirty-one days, two for the months of thirty days and four for February, the star wheel 48 and the wheel reference 24 comprising as many teeth.
- the elastic finger 28 is replaced by a toothed sector comprising three teeth, intended to cooperate with a lug 46 at the end of the thirty-day months and three lugs 46 to ensure the jump from twenty-nine to thirty, from thirty to thirty-one and from thirty-one to the first at the end of February.
- the date indicator 20 comprises two additional teeth arranged upstream of the teeth 36 and 37 and differing from them, so that they do not cooperate with the reference 24 until the end of February. .
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02713987A EP1379924A1 (en) | 2001-04-18 | 2002-04-17 | Calendar date mechanism |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01810382A EP1251412A1 (en) | 2001-04-18 | 2001-04-18 | Calendar mechanism |
EP01810382.0 | 2001-04-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002084413A1 true WO2002084413A1 (en) | 2002-10-24 |
Family
ID=8183862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2002/000212 WO2002084413A1 (en) | 2001-04-18 | 2002-04-17 | Calendar date mechanism |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP1251412A1 (en) |
WO (1) | WO2002084413A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2740275C2 (en) * | 2016-12-21 | 2021-01-12 | Бланпэн Са | Calendar mechanism |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1666991B1 (en) * | 2004-12-02 | 2011-06-01 | ETA SA Manufacture Horlogère Suisse | Annual calendar mechanism for a timepiece |
DE602006004357D1 (en) * | 2006-10-24 | 2009-01-29 | Eta Sa Mft Horlogere Suisse | Year calendar mechanism for clockwork |
EP2490083B1 (en) * | 2011-02-17 | 2013-10-16 | Glashütter Uhrenbetrieb GmbH | Calendar mechanism programme wheel |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3827234A (en) * | 1972-08-03 | 1974-08-06 | K Imanishi | Display device for calendar watch |
-
2001
- 2001-04-18 EP EP01810382A patent/EP1251412A1/en not_active Withdrawn
-
2002
- 2002-04-17 EP EP02713987A patent/EP1379924A1/en not_active Withdrawn
- 2002-04-17 WO PCT/CH2002/000212 patent/WO2002084413A1/en not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3827234A (en) * | 1972-08-03 | 1974-08-06 | K Imanishi | Display device for calendar watch |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2740275C2 (en) * | 2016-12-21 | 2021-01-12 | Бланпэн Са | Calendar mechanism |
Also Published As
Publication number | Publication date |
---|---|
EP1379924A1 (en) | 2004-01-14 |
EP1251412A1 (en) | 2002-10-23 |
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