EP1102134A1 - Retrograde sector display device - Google Patents
Retrograde sector display device Download PDFInfo
- Publication number
- EP1102134A1 EP1102134A1 EP99123050A EP99123050A EP1102134A1 EP 1102134 A1 EP1102134 A1 EP 1102134A1 EP 99123050 A EP99123050 A EP 99123050A EP 99123050 A EP99123050 A EP 99123050A EP 1102134 A1 EP1102134 A1 EP 1102134A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- display
- seconds
- graduation
- cam
- retrograde
- 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- Withdrawn
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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
- G04B19/00—Indicating the time by visual means
- G04B19/06—Dials
- G04B19/08—Geometrical arrangement of the graduations
- G04B19/082—Geometrical arrangement of the graduations varying from the normal closed scale
-
- 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
- G04B19/06—Dials
- G04B19/08—Geometrical arrangement of the graduations
- G04B19/087—Geometrical arrangement of the graduations with several separate scales
Definitions
- the present invention relates to this type of retrograde display but to for the purpose of achieving a display allowing animation of the dial of a shows and / or distinguishes between certain values of the same quantity, by example between day and night hours at a glance.
- Another object of the present invention is to allow greater diversity in the design of a timepiece and in particular to realize a attractive display by the mobility of some of its elements.
- the present invention relates to a sector display device retrograde which meets the aforementioned goals and which is distinguished by the The features set out in claim 1.
- the attached drawing illustrates schematically and by way of example several variants of the display according to the present invention and two embodiments of the mechanism for actuating the retrograde hands of the display.
- Figure 1 illustrates a first variant of the retrograde display device with two retrograde seconds hands, one indicating the seconds from 0 to 30 and the other from 30 to 60.
- FIG. 2 illustrates a second variant of the retrograde display device with two retrograde hour hands, one showing the hours daytime from 6 a.m. to 6 p.m. and the other night hours from 6 p.m. to 6 a.m.
- Figures 3 to 6 are plan views of a first embodiment the mechanism of the display device corresponding to the first or second variant of the display in different positions.
- FIG. 7 is a section along line A-A in FIG. 5.
- Figure 8 is a third variant of the display device.
- Figure 9 is a fourth variant of the display device.
- Figure 10 illustrates in plan a second embodiment of the mechanism of the display device corresponding to the third and fourth variants of display.
- the principle of the new display device according to the invention is to display the same quantity, the seconds, minutes or hours for example of retrograde but not with a single graduation but with two partial graduations, each preferably indicating half of the indication maximum of the displayed quantity, each cooperating with a needle retrograde.
- Timepiece 1 has a graduation traditional circular 2 from 1 to 12 with which an hour hand cooperates 3 and a minute hand 4.
- the seconds display has two ticks, a first 5 of 0 at 30 seconds and a second 6 from 30 to 60 seconds cooperating one 5 with a first needle 7 and the other 6 with a second needle 8, both driven by a retrograde mechanism.
- the retrograde mechanism actuating the hands 7, 8 of this display comprises a snail cam 9 comprising a part of approximately 180 ° cylindrical and another part of approximately 180 ° whose diameter increases.
- This cam 9 is driven by the clockwork movement due to a revolution per minute in a manner known per se.
- This mechanism also includes a first pinion 10, carrying the first needle 7, subjected to the return action of a first spiral spring 11 tending to keep this hand 7 in the display position of zero seconds.
- This first pinion 10 meshes with the toothed sector 12 of a first lever 13 pivoted at 14 and the other end of which has a spout 15 held in abutment against the cam 9 by the effect of the spiral spring 11.
- This mechanism also includes a second pinion 16, carrying the second needle 8, subjected to the return action of a second spiral spring 17 tending to keep the hand 8 in the display position for 30 seconds.
- This second sprocket 16 meshes with a toothed sector 18 of a second lever 19 pivoted at 20 and of which the other end has a spout 21 held in abutment by the second spring hairspring 17 against cam 9.
- the support points of the spouts 15 and 21 of the first and second levers 13, 19 on the cam 9 are located on a diameter of this cam and therefore offset angularly 180 °.
- the mechanism located in the position illustrated in FIG. 3.
- the spout 15 of the first lever 13 is located at the end of the cylindrical portion of the cam 9 while that the spout 21 of the second lever is at the start of this cylindrical portion of cam 9.
- Cam 9 moves clockwise and in one half turn of this cam 9 the first hand 7 goes from 0 to 30 seconds on the graduation 5, the first lever 13 being actuated by the cam 9 while the second lever 9 moves along the cylindrical portion of the cam 9. The mechanism then occupies the position illustrated in FIG. 4.
- the needle 7 remains stationary and it is the second hand 8 which goes from 30 to 60 seconds driven by the second lever 19 and the second pinion 16. Then a hundredth of a second later, the second hand 8 returns to 30 seconds from graduation 6 and the first hand 7 is ready for a new movement from 0 to 30 seconds next to the first graduation 5 (figure 6).
- a double retrograde display was thus produced for a single value at display working alternately and actuated by a single cam.
- FIG. 2 illustrates a second variant of the display device comprising a first graduation of the hours 22 cooperating with the hand 7 going from 6 hours to 6 p.m., i.e. daytime hours, and a second graduation of 23 hours cooperating with hand 8 going from 6 p.m. to 6 a.m., i.e. night hours.
- the timepiece has on its dial a circular minute scale 24 cooperating with a minute hand 25.
- the mechanism is identical to that illustrated in Figures 3 to 7 with reference to the first variant of the display device, the cam 9 being driven clockwise one revolution in twenty-four hours by the watch movement.
- Figures 1 and 2 the retrograde display of seconds, respectively hours, has two graduations in the form of circle sector arranged between the center of the dial and the pivot point of the needle 7, 8 corresponding and having a concave shape directed towards outside the dial.
- the third variant of the dual retrograde display illustrated in Figure 8 has a first graduation of 26 seconds and a second graduation seconds 27 cooperating respectively with the first 7 and second needle 8. These graduations are in the form of a sector of a circle and extend substantially parallel to the 2 hour scale.
- the mechanism driving the needles 7, 8 is identical to that described with reference to Figures 3 to 7 except for the more angled shape of the first and second levers 13, 19, that the centers of rotation of the needles 7, 8 are closer to one of the other and that needle 7 is on the right and needle 8 on the left.
- the operation of the mechanism is the same as that described above.
- the last variant of the display device illustrated in FIG. 9 comprises a 28 daytime graduation and a 29 nighttime graduation substantially concentric with the 24 minute scale and located at the top respectively at the bottom of the dial.
- the first and second needles 7, 8 are actuated by cam 9 as before.
- the mechanism illustrated in the figure 10 is simply angularly offset by 90 °.
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- Physics & Mathematics (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
Description
On connaít de nombreux affichages à secteur rétrograde et plus particulièrement celui décrit dans le brevet CH 666.591 comprenant une came agissant sur une bascule présentant un secteur denté en prise avec un pignon portant une aiguille, ce pignon étant soumis à l'action de rappel élastique d'un ressort spiral.We know many displays with retrograde sector and more particularly that described in patent CH 666.591 comprising a cam acting on a rocker with a toothed sector engaged with a pinion carrying a needle, this pinion being subjected to the elastic return action of a spiral spring.
La présente invention se rapporte à ce type d'affichage rétrograde mais à pour but la réalisation d'un affichage permettant une animation du cadran d'une montre et/ou la distinction entre certaines valeurs d'une même grandeur, par exemple entre les heures diurnes et nocturnes d'un seul coup d'oeil.The present invention relates to this type of retrograde display but to for the purpose of achieving a display allowing animation of the dial of a shows and / or distinguishes between certain values of the same quantity, by example between day and night hours at a glance.
Un autre but de la présente invention est de permettre une plus grande diversité dans le design d'une pièce d'horlogerie et notamment de réaliser un affichage attrayant par la mobilité de certains de ses éléments.Another object of the present invention is to allow greater diversity in the design of a timepiece and in particular to realize a attractive display by the mobility of some of its elements.
La présente invention a pour objet un dispositif d'affichage à secteur
rétrograde qui réponde aux buts précités et qui se distingue par les
caractéristiques énoncées à la revendication 1.The present invention relates to a sector display device
retrograde which meets the aforementioned goals and which is distinguished by the
The features set out in
Le dessin annexé illustre schématiquement et à titre d'exemple plusieurs variantes de l'affichage selon la présente invention et deux formes d'exécution du mécanisme d'actionnement des aiguilles rétrogrades de l'affichage.The attached drawing illustrates schematically and by way of example several variants of the display according to the present invention and two embodiments of the mechanism for actuating the retrograde hands of the display.
La figure 1 illustre une première variante du dispositif d'affichage rétrograde comportant deux aiguilles de secondes rétrogrades, l'une indiquant les secondes de 0 à 30 et l'autre de 30 à 60.Figure 1 illustrates a first variant of the retrograde display device with two retrograde seconds hands, one indicating the seconds from 0 to 30 and the other from 30 to 60.
La figure 2 illustre une seconde variante du dispositif d'affichage rétrograde comportant deux aiguilles des heures rétrogrades, l'une indiquant les heures diurnes de 6h à 18h et l'autre les heures nocturnes de 18h à 6h. FIG. 2 illustrates a second variant of the retrograde display device with two retrograde hour hands, one showing the hours daytime from 6 a.m. to 6 p.m. and the other night hours from 6 p.m. to 6 a.m.
Les figures 3 à 6 sont des vues en plan d'une première forme d'exécution du mécanisme du dispositif d'affichage correspondant à la première ou la seconde variante de l'affichage dans différentes positions.Figures 3 to 6 are plan views of a first embodiment the mechanism of the display device corresponding to the first or second variant of the display in different positions.
La figure 7 est une coupe suivant la ligne A-A de la figure 5.FIG. 7 is a section along line A-A in FIG. 5.
La figure 8 est une troisième variante du dispositif d'affichage.Figure 8 is a third variant of the display device.
La figure 9 est une quatrième variante du dispositif d'affichage.Figure 9 is a fourth variant of the display device.
La figure 10 illustre en plan une seconde forme d'exécution du mécanisme du dispositif d'affichage correspondant aux troisième et quatrième variantes de l'affichage.Figure 10 illustrates in plan a second embodiment of the mechanism of the display device corresponding to the third and fourth variants of display.
Le principe du nouveau dispositif d'affichage selon l'invention est d'afficher une même grandeur, les secondes, les minutes ou les heures par exemple de façon rétrograde mais non pas avec une seule graduation mais avec deux graduations partielles, indiquant chacune de préférence la moitié de l'indication maximale de la grandeur affichée, coopérant chacune avec une aiguille rétrograde.The principle of the new display device according to the invention is to display the same quantity, the seconds, minutes or hours for example of retrograde but not with a single graduation but with two partial graduations, each preferably indicating half of the indication maximum of the displayed quantity, each cooperating with a needle retrograde.
Ceci permet de nouvelles dispositions de l'affichage et la réalisation de montres se distinguant radicalement de la présentation habituelle.This allows new display arrangements and the realization of watches radically different from the usual presentation.
La première variante illustrée à la figure 1 concerne un affichage double
des secondes rétrogrades. La pièce d'horlogerie 1 comporte une graduation
traditionnelle circulaire 2 de 1 à 12 avec laquelle coopère une aiguille des heures
3 et une aiguille des minutes 4.The first variant illustrated in Figure 1 relates to a dual display
retrograde seconds.
L'affichage des secondes comporte deux graduations, une première 5 de 0
à 30 secondes et une seconde 6 de 30 à 60 secondes coopérant l'une 5 avec une
première aiguille 7 et l'autre 6 avec une seconde aiguille 8, toutes deux entraínées
par un mécanisme rétrograde.The seconds display has two ticks, a first 5 of 0
at 30 seconds and a second 6 from 30 to 60 seconds cooperating one 5 with a
first needle 7 and the other 6 with a
Ces deux graduations 5 et 6 présentent la forme générale de secteur de
cercle dont le diamètre et la longueur peuvent varier au choix du concepteur. These two
Le mécanisme rétrograde actionnant les aiguilles 7, 8 de cet affichage
comporte une came escargot 9 comportant une partie d'environ 180° cylindrique et
une autre partie d'environ 180° dont le diamètre croít.The retrograde mechanism actuating the
Cette came 9 est entraínée par le mouvement d'horlogerie à raison d'un
tour par minute de façon connue en soit.This
Ce mécanisme comporte encore un premier pignon 10, portant la première
aiguille 7, soumis à l'action de rappel d'un premier ressort spiral 11 tendant à
maintenir cette aiguille 7 en position d'affichage de zéro secondes. Ce premier
pignon 10 engrène avec le secteur denté 12 d'un premier levier 13 pivoté en 14 et
dont l'autre extrémité comporte un bec 15 maintenu en appui contre la came 9 par
l'effet du ressort spiral 11.This mechanism also includes a
Ce mécanisme comporte encore un second pignon 16, portant la seconde
aiguille 8, soumis à l'action de rappel d'un second ressort spiral 17 tendant à
maintenir l'aiguille 8 en position d'affichage de 30 secondes. Ce second pignon 16
engrène avec un secteur denté 18 d'un second levier 19 pivoté en 20 et dont
l'autre extrémité comporte un bec 21 maintenu en appui par le second ressort
spiral 17 contre la came 9.This mechanism also includes a
Les points d'appui des becs 15 et 21 des premier et second leviers 13, 19
sur la came 9 sont situés sur un diamètre de cette came et donc décalés
angulairement de 180°.The support points of the
Lorsque l'affichage indique zéro seconde, la première aiguille 7 est sur le
zéro de la graduation 5 et la seconde aiguille 8 est sur le 30 de la graduation 6, le
mécanisme se trouvant dans la position illustrée à la figure 3. Le bec 15 du
premier levier 13 se trouve à la fin de la portion cylindrique de la came 9 tandis
que le bec 21 du second levier se trouve au début de cette portion cylindrique de
la came 9.When the display shows zero seconds, the first hand 7 is on the
zero of
La came 9 se déplace dans le sens des aiguilles d'une montre et en un
demi tour de cette came 9 la première aiguille 7 passe de 0 à 30 secondes sur la
graduation 5, le premier levier 13 étant actionné par la came 9 tandis que le
second levier 9 se déplace le long de la portion cylindrique de la came 9. Le
mécanisme occupe alors la position illustrée à la figure 4.
Un centième de seconde plus tard, le premier levier 13 a échapé à la partie
haute de la came 9 et est en appui sur la portion cylindrique de celle-ci, le second
levier 19 est lui toujours en appui sur cette portion cylindrique de la came 9. Le
mécanisme est dans la position illustrée à la figure 5. La première aiguille 7 est
revenue à zéro et la seconde aiguille 8 est toujours sur 30 secondes.A hundredth of a second later, the
Pendant les 30 secondes suivantes l'aiguille 7 reste immobile et c'est la
seconde aiguille 8 qui passe de 30 à 60 secondes entraínée par le second levier
19 et le second pignon 16. Puis un centième de seconde plus tard, la seconde
aiguille 8 revient sur 30 secondes de la graduation 6 et la première aiguille 7 est
prête pour un nouveau déplacement de 0 à 30 secondes en regard de la première
graduation 5 (figure 6).During the following 30 seconds the needle 7 remains stationary and it is the
On a ainsi réalisé un double affichage rétrograde pour une seule valeur à afficher travaillant en alternance et actionné par une seule came.A double retrograde display was thus produced for a single value at display working alternately and actuated by a single cam.
La figure 2 illustre une seconde variante du dispositif d'affichage comportant
une première graduation des heures 22 coopérant avec l'aiguille 7 allant de 6
heures à 18 heures, soit les heures diurnes, et une seconde graduation des
heures 23 coopérant avec l'aiguille 8 allant de 18 heures à 6 heures, soit les
heures nocturnes.FIG. 2 illustrates a second variant of the display device comprising
a first graduation of the
Dans cette variante, la pièce d'horlogerie comporte sur son cadran une
graduation circulaire des minutes 24 coopérant avec une aiguille des minutes 25.In this variant, the timepiece has on its dial a
Dans cette variante, le mécanisme est identique à celui illustré aux figures 3
à 7 en référence à la première variante du dispositif d'affichage, la came 9 étant
entraínée dans le sens horaire à raison d'un tour en vingt-quatre heures par le
mouvement d'horlogerie.In this variant, the mechanism is identical to that illustrated in Figures 3
to 7 with reference to the first variant of the display device, the
Dans ces deux variantes, figures 1 et 2, l'affichage rétrograde des
secondes, respectivement des heures, comporte deux graduations en forme de
secteur de cercle disposées entre le centre du cadran et le point de pivotement de
l'aiguille 7, 8 correspondantes et présentant une forme concave dirigée vers
l'extérieur du cadran.In these two variants, Figures 1 and 2, the retrograde display of
seconds, respectively hours, has two graduations in the form of
circle sector arranged between the center of the dial and the pivot point of
the
La troisième variante de l'affichage rétrograde double illustrée à la figure 8
comporte une première graduation des secondes 26 et une seconde graduation
des secondes 27 coopérant respectivement avec les première 7 et seconde
aiguille 8. Ces graduations sont en forme de secteur de cercle et s'étendent
sensiblement parallèlement à la graduation 2 des heures. Le mécanisme
entraínant les aiguilles 7, 8 est identique à celui décrit en référence aux figures 3 à
7 sauf en ce qui concerne la forme plus coudée des premier et second leviers 13,
19, que les centres de rotation des aiguilles 7, 8 sont plus rapprochés l'un de
l'autre et que l'aiguille 7 se trouve à droite et l'aiguille 8 à gauche. Le
fonctionnement du mécanisme est le même que celui décrit précédemment.The third variant of the dual retrograde display illustrated in Figure 8
has a first graduation of 26 seconds and a second graduation
seconds 27 cooperating respectively with the first 7 and
La dernière variante du dispositif d'affichage illustrée à la figure 9 comporte
une graduation 28 des heures diurnes et une graduation des heures nocturnes 29
sensiblement concentriques à la graduation des minutes 24 et situées en haut
respectivement en bas du cadran. Les première et seconde aiguilles 7, 8 sont
actionnées par la came 9 comme précédemment. Le mécanisme illustré à la figure
10 est simplement décalé angulairement de 90°.The last variant of the display device illustrated in FIG. 9 comprises
a 28 daytime graduation and a 29 nighttime graduation
substantially concentric with the 24 minute scale and located at the top
respectively at the bottom of the dial. The first and
On voit bien qu'un tel affichage rétrograde double pour la même grandeur affichée permet de renouveler l'apparence des cadrans d'une montre et également de présenter un affichage mobile attrayant.We can see that such a retrograde double display for the same size displayed allows you to renew the appearance of the watch faces and also to present an attractive mobile display.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99123050A EP1102134A1 (en) | 1999-11-19 | 1999-11-19 | Retrograde sector display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99123050A EP1102134A1 (en) | 1999-11-19 | 1999-11-19 | Retrograde sector display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1102134A1 true EP1102134A1 (en) | 2001-05-23 |
Family
ID=8239429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99123050A Withdrawn EP1102134A1 (en) | 1999-11-19 | 1999-11-19 | Retrograde sector display device |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1102134A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1164443A1 (en) * | 2000-01-24 | 2001-12-19 | Seiko Instruments Inc. | Electronic timepiece having indication hands |
| EP1164442A1 (en) * | 2000-01-24 | 2001-12-19 | Seiko Instruments Inc. | Electronic timepiece having indication hands |
| EP1672437A2 (en) * | 2004-12-15 | 2006-06-21 | Seiko Instruments Inc. | Multifunction timepiece capable of constituting plural fan shape moving hand train wheel layouts |
| SG125951A1 (en) * | 2003-03-27 | 2006-10-30 | Frank Muller Watchland S A | Retrograde display mechanism |
| US7817501B2 (en) | 2006-03-30 | 2010-10-19 | Ronda Ag | Mechanism for moving an indicator of a clock |
| EP3540522A1 (en) * | 2018-03-13 | 2019-09-18 | Harry Winston SA | Retrograde display mechanism for a timepiece |
| CN111983915A (en) * | 2020-09-24 | 2020-11-24 | 东莞市亿丰钟表有限公司 | A reading display device |
| CN113311684A (en) * | 2021-07-03 | 2021-08-27 | 马先明 | Double-retrograde timing clock |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE361587C (en) * | 1922-10-16 | Max Diehl | Clocks with back swinging hands, especially for twenty-four hour division | |
| US5043955A (en) * | 1989-03-30 | 1991-08-27 | Le Phare Jean D'eve S.A. | Analogic display module for watch movement |
| US5257246A (en) * | 1991-03-08 | 1993-10-26 | Ehsman Patricia M | Timekeeping display |
-
1999
- 1999-11-19 EP EP99123050A patent/EP1102134A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE361587C (en) * | 1922-10-16 | Max Diehl | Clocks with back swinging hands, especially for twenty-four hour division | |
| US5043955A (en) * | 1989-03-30 | 1991-08-27 | Le Phare Jean D'eve S.A. | Analogic display module for watch movement |
| US5257246A (en) * | 1991-03-08 | 1993-10-26 | Ehsman Patricia M | Timekeeping display |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1164442A1 (en) * | 2000-01-24 | 2001-12-19 | Seiko Instruments Inc. | Electronic timepiece having indication hands |
| EP1164443A4 (en) * | 2000-01-24 | 2005-06-15 | Seiko Instr Inc | Electronic timepiece having indication hands |
| EP1164442A4 (en) * | 2000-01-24 | 2005-06-15 | Seiko Instr Inc | Electronic timepiece having indication hands |
| EP1164443A1 (en) * | 2000-01-24 | 2001-12-19 | Seiko Instruments Inc. | Electronic timepiece having indication hands |
| SG125951A1 (en) * | 2003-03-27 | 2006-10-30 | Frank Muller Watchland S A | Retrograde display mechanism |
| EP1672437A3 (en) * | 2004-12-15 | 2007-05-02 | Seiko Instruments Inc. | Multifunction timepiece capable of constituting plural fan shape moving hand train wheel layouts |
| EP1672437A2 (en) * | 2004-12-15 | 2006-06-21 | Seiko Instruments Inc. | Multifunction timepiece capable of constituting plural fan shape moving hand train wheel layouts |
| US7817501B2 (en) | 2006-03-30 | 2010-10-19 | Ronda Ag | Mechanism for moving an indicator of a clock |
| EP3540522A1 (en) * | 2018-03-13 | 2019-09-18 | Harry Winston SA | Retrograde display mechanism for a timepiece |
| KR20190108064A (en) * | 2018-03-13 | 2019-09-23 | 해리 윈스톤 에스에이 | Retrograde display mechanism for horology |
| CN110275423A (en) * | 2018-03-13 | 2019-09-24 | 哈里·温斯顿公司 | Inverse jump indication mechanism for clock and watch |
| CN110275423B (en) * | 2018-03-13 | 2021-03-30 | 哈里·温斯顿公司 | Timepiece display mechanism, and timepiece movement and watch including the same |
| US11320787B2 (en) | 2018-03-13 | 2022-05-03 | Harry Winston Sa | Retrograde display mechanism for horology |
| CN111983915A (en) * | 2020-09-24 | 2020-11-24 | 东莞市亿丰钟表有限公司 | A reading display device |
| CN113311684A (en) * | 2021-07-03 | 2021-08-27 | 马先明 | Double-retrograde timing clock |
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