US3659412A - Positioner for calendar dial in timepiece - Google Patents

Positioner for calendar dial in timepiece Download PDF

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Publication number
US3659412A
US3659412A US49722A US3659412DA US3659412A US 3659412 A US3659412 A US 3659412A US 49722 A US49722 A US 49722A US 3659412D A US3659412D A US 3659412DA US 3659412 A US3659412 A US 3659412A
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US
United States
Prior art keywords
dial
wheel
star wheel
positioner
spring
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.)
Expired - Lifetime
Application number
US49722A
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English (en)
Inventor
Kenji Miyasaka
Yasuaki Nakayama
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP6001269U external-priority patent/JPS487093Y1/ja
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Application granted granted Critical
Publication of US3659412A publication Critical patent/US3659412A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears
    • 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

Definitions

  • the positioner for the claendar dial fitted in a calendar timepiece is adapted to keep the dial in its working position in a highly stabilized manner. Since the idle distance between the dial plate and the star wheel of the timepiece varies on account of unfavorable deflections or deformations of the dial plate, the stabilizing positioner comprises a resilient ring made from a plate the inner periphery of which abutts upon a first mounting shoulder formed on the cannon wheel of the timepiece and the outer periphery of which abutts on a second mounting shoulder formed on the star wheel.
  • SHEET 3 (IF 3 POSITIONER FOR CALENDAR DIAL IN TIMEPIECE This invention relates generally to calendar timepieces. More specifically, it is concerned with improvements, in the positioner for the calendar dial fitted in the timepieceof the above kind, adapted for keeping the said dial in its working position in a highly stabilized and secure manner.
  • a dial washer is used, said washer being positioned between the day star wheel and the dial plate.
  • the day calendar dial is rigidly attached concentrically to said star wheel and said dial washer urges the star wheel against the plate, so as to control axial idle movement of the star wheel.
  • the idle distance between the dial plate and the star wheel varies on account of unavoidable deflection or the like deformation of the dial.
  • the range of the unavoidable axial idle movement of the star wheel can be determined only after fitting the dial in position. If, in this case, the said idling range be found to reside outside of the prescribed allowable one, the dial washer should be subjected to manual adjustment in its elasticity, which constitutes still a further conventional drawback.
  • FIG. 1 is an axially sectional view of essential embodiment of the invention.
  • FIG. 2 is a plan view of a stabilizer spring employed in the first embodiment shown in FIG. 1.
  • FIG. 3 is a sectional view taken on the section line 3-3 shown in FIG. 2.
  • FIGS. 4-9 are similar views to FIG. 2, illustrative of several modifications from the positioner spring shown therein.
  • FIG. is a plan view of a timepiece movement embodying the mechanism shown in FIG. 1, being, however drawn on somewhat reduced scale.
  • FIG. 11 is a similar view to FIG. 1, showing, however, a second embodiment of the invention.
  • numeral l0 denotes a conventional center wheel to which a cannon pinion ll of the conventional design is attached fricparts of a first tionally.
  • Numeral 12 denotes a conventional fourth pinion.
  • said star wheel being formed with a concentric and stepped recess 16a for stabilizedly positioning therein a disc spring 18.
  • a ring shoulder 16b on which the outer peripheral edge of positioner spring 18 abuts under pressure.
  • the upper side wall 14b of said ring groove 14a constitutes a ring shoulder on which the inner peripheral edge of positioner spring I8 abuts again under pressure, the urging pressure exerted by the spring directing downwards relative to the star wheel 16.
  • the spring is made from a plate and has a flattened circular configuration in its plan view, a pair of diametrally opposite ears 18a and 18b being formed on the concavely curved and flattened sides of the spring 18.
  • the mounting shoulders 14b and 16b are positioned substantially at a same level when seen in FIG. 1 for providing the axially directing thrust.
  • day disc 15 is fixedly attached to the conventional plate 20 by means of set screws, not shown.
  • Numeral 19 only partially shown, represents a conventional time-indicating dial.
  • the day dial stabilizing ring spring 18 has a plan configuration shown in FIG. 2, a sectional view thereof being shown in FIG. 3.
  • a diametrally outwardly directing manual force is applied onto one of these cars from outside by means of a proper tool such as, for instance, a pincette, so as to expand the ring spring outwardly from upper or lower in FIG. 2.
  • the pincette can engage the opposed recesses on opposite sides of the ear 18a or 18b.
  • the height of the mounting shoulder 16b formed in the day star wheel 16 is so selected that the plate-like ring spring 18 when positioned in position as shown may serve well to exert an urging pressure upon the day star wheel 16 which is thus kept in pressurized axial engagement with the cannon wheel 14.
  • cannon wheel 14 is limited by the plate 20, on the one hand, and by the reduced extension lSa of day disc 15, on the other, so that an unintentional disengagement of cannon wheel from meshing with minute pinion 21 may be positively prevented.
  • the amount of unintentional axial movement of day dial l7 and day star wheel 16 is generally and substantially equal to that of the cannon wheel 14, under normal working position of the timepiece movement without being influenced by sudden and substantial outside shocks.
  • the dimensional allowance for said movability must be substantially larger than the case of the said pressure-engaging arrangement of said star wheel wherein the axial movability thereof becomes a substantial amount and the dial 19 may be positioned at a considerably lower position when seen in FIG. I, thus providing a substantially reduced overall height of the timepiece movement.
  • the ring spring 18 used for stabilizing the day calendar dial is, as was referred to hereinabove, a plate and there is no difference between the front and the back surface, which is highly convenient in the assembly thereof, because there is no necessity for identifying either desired surface.
  • FIGS. 4-9 several modifications from the day dial stabilizing spring 18 shown in FIGS. 2-3, at 22-27, respectively.
  • the spring is formed with convexedly projecting projections 22a and 22b which serve substantially for the same purpose as performed by the ears 18a and 18b shown in FIG. 2
  • the spring shown at 23 is formed with similar oppositely directing convex projections 23a and 23b.
  • the purpose of the provision of these projections is similar to those described in connection with FIGS. 24.
  • the ring spring is fonned into an open shape instead of the closed one which has been shown and described hereinbefore.
  • this modification shown in FIG. 6 is formed into an open ring spring, there being several inwardly directing projections shown at 24a, 24b, 24c and 24d, as shown. These projections serve as the ears 18a, 18b, shown in FIG. 2, regardless of difference in the configuration of each of these projections.
  • FIG. 7 a still further modified configuration of the positioner spring is shown at 25, which has been formed into a trilobe.
  • one of these projections is manipulated by means of a proper tool so as to disengage only a part of the whole ring from position.
  • chain dotted line double ring denotes in an imaginary and schematic way the aforementioned in a mounting shoulder 14b.
  • FIG. 8 A still further modified positional spring is shown in FIG. 8 at 26.
  • This positional spring 26 comprises a completely closed circular ring portion 260 which is rigidly attached outside circular element 26b and 26c arranged oppositely to each other.
  • Said inner elements 26b and 26c are connected rigidly with the outer ring portion 26a by connecting portions 26d and 26e, respectively.
  • these connecting portions 26d and 26e serve as the ears shown in FIG. 2 at 18a and 18b, respectively, irrespective of substantial difference in their configuration.
  • a still further modified positional spring shown at 27 in FIG. 9 has been shaped into a closed rectangular ring which has several portions shown at 27a, 27b, 27c and 27d, serving each as the ear 18a or 18b shown in FIG. 2.
  • FIG. illustrative of a timepiece movement including the mechanism shown in FIG.
  • numeral 29 denotes a conventional winding stem; 30 a winding pinion; 31 a calendar feed wheel; 32 a date calendar feed pawl wheel; 33 a day calendar feed pawl wheel; 34 an intermediate wheel; 35 a date calendar dial; 36 a jumper for the latter; and 37 a day jumper spring.
  • Main working parts shown in FIG. 1 are also shown by respective same reference numerals.
  • the day star wheel shown at 16 is formed with a ring groove 16b formed within the area of the concentric stepped recess 16d, the lower side wall of this groove serving as the outer mounting shoulder in the similar sense referred to hereinbefore in connection with that shown at 16b in FIG. I.
  • the positioner spring is kept in engaging position with both cannon wheel and day star wheel so as to provide a resilient axial thrust directing towards the plate upon the cannon wheel, by virtue of axial flexibility of the positioner spring which has been placed in position under slight tension.
  • a part of the cannon wheel is positioned between the plate and the mounting plate so as to be subjected therebetween to a limitation in its idle axial movement, as was referred to herein-before. Since the star wheel is placed in position under resilient pressure exerted by jumper lever and the positioner spring is kept also in resilient pressure engagement with both cannon wheel and day star wheel, the cannon wheel is thus prevented from otherwise possible slight idle rotation, thereby an fluctuative movement of the hour hand being positively prevented.
  • a calendar timepiece movement comprising a calendar dial, a star wheel made rigid with said dial and arranged to be driven by a conventional gear train of said movement for feeding said dial, a cannon wheel mounted concentrially with said star wheel, a pivotable jumper lever arranged to cooperate with said star wheel by exerting a resilient pressure thereupon for provisionally positioning the latter, and a mounting plate fixedly mounted on the conventional plate of the movement
  • the improvement consists in that a positioner spring for said calendar dial is inserted between the cannon wheel and the star wheel, the positioner spring comprises a resilient ring made from a plate, the inside periphery of said ring spring abutting upon a first mounting shoulder formed on the cannon wheel and the outer periphery of the same ring spring abutting on a second mounting shoulder formed on the star wheel.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Toys (AREA)
US49722A 1969-06-26 1970-06-25 Positioner for calendar dial in timepiece Expired - Lifetime US3659412A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6001269U JPS487093Y1 (US20040152965A1-20040805-M00009.png) 1969-06-26 1969-06-26
JP1228870 1970-02-06

Publications (1)

Publication Number Publication Date
US3659412A true US3659412A (en) 1972-05-02

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ID=26347867

Family Applications (1)

Application Number Title Priority Date Filing Date
US49722A Expired - Lifetime US3659412A (en) 1969-06-26 1970-06-25 Positioner for calendar dial in timepiece

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US (1) US3659412A (US20040152965A1-20040805-M00009.png)
DE (1) DE2031341A1 (US20040152965A1-20040805-M00009.png)
FR (1) FR2049124B1 (US20040152965A1-20040805-M00009.png)
GB (1) GB1252547A (US20040152965A1-20040805-M00009.png)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4204395A (en) * 1977-05-20 1980-05-27 Kabushiki Kaisha Daini Seikosha Calendar mechanism of a portable timepiece
EP1411400A1 (fr) * 2002-10-16 2004-04-21 ETA SA Manufacture Horlogère Suisse Dispositif de fixation d'un mobile coaxial dans une pièce d'horlogerie, notamment d'un disque indicateur des jours
US20100195449A1 (en) * 2002-07-09 2010-08-05 Ruchonnet Jean-Francois Clock work movement for a wristwatch
US9678477B2 (en) * 2014-09-12 2017-06-13 Seiko Instruments Inc. Mechanical component, mechanical component manufacturing method, movement, and timepiece

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1226392A1 (ru) * 1978-08-11 1986-04-23 Научно-исследовательский институт часовой промышленности Редуктор электронно-механических наружных часов с шаговым двигателем
CN114545756A (zh) * 2022-02-23 2022-05-27 东阳市华佳电子有限公司 一种双历机芯卡环定位结构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582879A (en) * 1948-02-18 1952-01-15 Felsa S A Calendar timepiece
US2591819A (en) * 1950-02-16 1952-04-08 Rolex Montres Calendar timepiece

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH46864A (fr) * 1909-05-03 1910-04-16 Graizely & Cie Dispositif d'ajustement à frottement gras d'un renvoi de transmission sur l'arbre d'un mobile de mouvement d'horlogerie
CH248869A (de) * 1946-12-30 1947-05-31 Hanhart Willy Stossdämpfendes Lager für Uhrwerke.
DE807913C (de) * 1948-11-29 1951-07-09 Emil Unterwagner Dipl Ing Bruchsicheres Zapfenlager
CH285375A (fr) * 1949-02-05 1952-08-31 Erismann Gerard Dispositif pare-chocs.
CH292137A (fr) * 1949-09-23 1953-07-31 Colomb Henri Palier amortisseur de chocs, notamment pour mouvement d'horlogerie, procédé pour la fabrication de ce palier et outil pour la mise en oeuvre de ce procédé.
CH300365A (fr) * 1952-06-30 1954-07-31 Vuilleumier Marcel Palier fixe pour pièce d'horlogerie.
FR1090603A (fr) * 1953-09-28 1955-04-01 Palier antichocs notamment pour mobiles de mouvements d'horlogerie
CH318237A (fr) * 1954-06-22 1956-12-31 Marti Fritz Palier pour mobile de mouvement d'horlogerie

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582879A (en) * 1948-02-18 1952-01-15 Felsa S A Calendar timepiece
US2591819A (en) * 1950-02-16 1952-04-08 Rolex Montres Calendar timepiece

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4204395A (en) * 1977-05-20 1980-05-27 Kabushiki Kaisha Daini Seikosha Calendar mechanism of a portable timepiece
US20100195449A1 (en) * 2002-07-09 2010-08-05 Ruchonnet Jean-Francois Clock work movement for a wristwatch
US8498180B2 (en) * 2002-07-09 2013-07-30 Lvmh Swiss Manufactures Sa Clock work movement for a wristwatch
US8976629B2 (en) 2002-07-09 2015-03-10 Lvmh Swiss Manufactures Sa Clock work movement for a wristwatch
EP1411400A1 (fr) * 2002-10-16 2004-04-21 ETA SA Manufacture Horlogère Suisse Dispositif de fixation d'un mobile coaxial dans une pièce d'horlogerie, notamment d'un disque indicateur des jours
US9678477B2 (en) * 2014-09-12 2017-06-13 Seiko Instruments Inc. Mechanical component, mechanical component manufacturing method, movement, and timepiece

Also Published As

Publication number Publication date
DE2031341A1 (de) 1971-01-07
FR2049124A1 (US20040152965A1-20040805-M00009.png) 1971-03-26
FR2049124B1 (US20040152965A1-20040805-M00009.png) 1973-08-10
GB1252547A (US20040152965A1-20040805-M00009.png) 1971-11-03

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