US3893289A - Watch movement with a circular movable indicator member - Google Patents

Watch movement with a circular movable indicator member Download PDF

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Publication number
US3893289A
US3893289A US483435A US48343574A US3893289A US 3893289 A US3893289 A US 3893289A US 483435 A US483435 A US 483435A US 48343574 A US48343574 A US 48343574A US 3893289 A US3893289 A US 3893289A
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US
United States
Prior art keywords
base plate
toothing
teeth
jumper
indicator member
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
US483435A
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English (en)
Inventor
Urs Giger
Edwin Jakob
Friedrich Perrot
Paul David
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.)
ETA SA Manufacture Horlogere Suisse
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA AG
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
Application filed by Ebauchesfabrik ETA AG filed Critical Ebauchesfabrik ETA AG
Application granted granted Critical
Publication of US3893289A publication Critical patent/US3893289A/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
    • 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

  • ABSTRACT A watch movement comprising a base plate having a protuberant portion, a circular movable indicator member provided with a peripheral toothing having a plurality of teeth and rotatively guided by the protuberant portion of the base plate, a holding plate rigidly secured to the base plate and having an arcuate edge portion extending over an arc less than 180 above the toothing, a jumper mounted on the base plate, and cover elements extending opposite the edge portion and above the toothing, the cover elements being rigidly connected to the base plate and including projections separated by notches, the shape and distribution of the notches being identical to those of the teeth, the indicator member having a resting position provided by the jumper mounted on the base plate, and each projection extending above one of the teeth when the indicating member is in the resting portion.
  • This invention relates to a watch movement comprising a base plate. a circular movable indicator member provided with a peripheral toothing and rotatively guided by a protuberant portion of the base plate. and a number of cover elements. each extending opposite at least one tooth of the indicator member so as to hold it axially in place.
  • Watch movements for date-watches generally comprise a ring with an inner toothing mounted on the base plate. normally held in a fixed position by a jumperspring and driven by one step every 24 hours.
  • This ring is guided by the lateral face of a boss projecting from the base plate or. as the case may be. by the edge of a retaining plate.
  • At the periphery of this retaining plate is an annular rim which is either continuous or divided into segments so as to cover the inner toothing of the date-ring over one or more arcs of a circle of a suffcient length to keep the ring in place in the axial direction ofthe watch.
  • this retaining plate which may also be divided into a number of partial plates. likewise serves to hold parts of the winding and setting mechanism or parts of the calendar mechanism axially in place.
  • the retaining plate holds the jumper of the date-ring. as well as the spring acting upon this jumper, in place.
  • the retaining plate When the movement is being assembled. and after overhaul or repair. the retaining plate must be fastened to the base plate again; and when. as is often the case. it also serves to hold the jumper in place. this operation presents certain difficulties.
  • the jumper must then be fitted with its spring and the date-ring before the retaining plate can be laid on the base plate and fastened with screws. Inasmuch as the spring is then tensed. since the jumper is pressed against the toothing ofthe date'ring. it can be ejected as a result of a shock or vibration before the retaining plate is actually in place. and this complicates the assembly operation.
  • the cover elements comprise at least one permanent ele ment rigidly joined to a retaining member fastened to the base plate.
  • the permanent cover member or members covering a portion of the toothing extending over less than 180.
  • a non-permanent cover element formed in one piece with a support body permanently mounted on the base plate. the position of the nonpermanent element with respect to the teeth facing it being variable from a relative covering position to a relative disengagement position without modification of the mounting means ofthe body. and the portion of the indicator member facing the non-permanent cover element being adapted to be disengaged from the protuberant portion when the non-permanent cover element is in the disengagement position.
  • FIG. I is a top plan view of a first embodiment. the retaining plate being partially broken away.
  • FIG. 2 is a section on a larger scale taken on the line Illl of FIG. 1.
  • FIG. 3 is a partial top plan view of a second embodiment on a larger scale than that of FIG. 1.
  • FIG. 4 is a view analogous to FIG. 3 of a third embodiment.
  • FIG. 5 is a top plan view of a modified form of the jumper of the first embodiment.
  • FIG. 6 is a section taken on the line Vl-VI of FIG. 5.
  • FIG. 1 shows a base plate I of a calendar watch movement. on which there is mounted a date-ring 2 having a 3I-tooth inner toothing 3.
  • An hour-wheel 4 is rotated by the movement in a conventional manner and actuates a transmission wheel-and-pinion 5 which permanently drives a calendar wheel 6 at the rate of one revolution per day.
  • This wheel 6 actuates the date-ring 2 by one step per day by means which are not shown. so that figures inscribed on the upper face of the ring 2 appear successively in an aperture in the dial. Except for its short periods of displacement. which may be reduced to virtually instantaneous jumps. the date-ring 2 remains stationary.
  • a hairpin spring 9 acts upon the jumper 8.
  • One of the ends of this spring 9 rests on the jumper 7, while the other end rests against the flank of a recess in the base plate 1.
  • the point of the jumper 7 is triangular and normally rests against two of the teeth of the ring 2. which suffices to block it.
  • the ring 2 rests on the base plate I. It is guided laterally by the flank Ia ofa protuberance or projection formed in the base plate 1.
  • the flank of this projection is a cylindrical surface portion coaxial with the movement. and the radius of which is adjusted to the inner faces of the teeth 3.
  • the movement described here comprises a holding or retaining plate I0 which covers the movement. and the two ends of which may be seen in the drawing.
  • This plate I0 is of an elongated shape and extends across the movement diametrically. It is fastened to the base plate I by a screw 10b and one or two guide studs 10a. It is placed upon the upper faces of projections which ensure the guidance of the ring 2 in rotation. so that it is situated at a level slightly above that of the upper faces of the teeth 3. At one of its ends. it has an arcuate edge 11 which covers a few teeth of the ring 2.
  • the edge II extends over an arc of less than
  • the other end of the plate 10 is narrower than the portions having the curved edge II.
  • the crenellated edge of this other end comprises two trapezoidal notches l2 and 13 separated by a projection 14.
  • On either side of the notches l2 and I3 are end portions 15 and 16 which likewise constitute projections.
  • the notches I2 and 13 are of the same size and arrangement as the teeth 3 and that their spacing is exactly equal to the pitch of the toothing 3.
  • each of the notches l2 and 13. viewed in the direction of an arrow 17 in FIG. 1 which indicates the normal direction of movement of the ring 2, have slightly inclined bevels 18, while the rear edges of the notches l2 and 13 are slightly bent downwards so that the lower faces of the projections exhibit slopes such as the slope 19. these slopes having approximately the same inclination as the bevels 18.
  • the fitting of the ring 2 is greatly facilitated by the arrangement just described.
  • the plate 10 may be fas tened on the base plate 1 and may hold the spring 9 and the jumper 7 in place.
  • the ring 2 itself will be put in place as follows: the ring 2 will be held over the base plate 1 in a slightly slanted position. and a portion of its toothing 3 will be engaged under the arcuate edge 11 of the plate 10.
  • the jumper 7 will be made to pivot inwardly. tcnsing the spring 9. and the ring 2 will be positioned so that two of its teeth 3 exactly face the notches l2 and 13.
  • the ring 2 can then be placed on the base plate I so that when the jumper 7 is released. its left flank.
  • FIG. 1 shows the final position of the ring 2. It will be seen that the rear portions of the teeth engaged under the projections 14 and 16 still appear in the notches l2 and 13. The arrangement just described obviously keeps the ring 2 both centered and held against the base plate 1. On the other hand, when the date-change takes place. if the teeth pass rapidly into the position where they are facing the notches l2 and I3.
  • the bevels I8 are intended to prevent blocking of the upper front edges of the teeth 3 against the front edges of the notches in case a slight axial displacement should occur.
  • the slopes 19 are intended to hold the ring 2 against the base plate 1 and likewise to prevent the risk of blocking when the date changes.
  • the jumper 7 may be designed as shown in FIGS. 5 and 6.
  • a jumper 20 is a flexible steel blade blanked and bent in a plate 21 which may be fastened to the base plate I. The front end of this blade is bent in a ⁇ /-shape so as to rest against two of the teeth 3, but a front end element 22 of the jumper 20 is also bent obliquel so that it rests only against the upper edge of one of the teeth 3'. with this arrangement. as will be seen in the drawing. the front element 22 of the jumper 20 tests against the point where the inner upper edge of the tooth Jjoins the rear side edge and the rear vertical edge.
  • the force exerted by the jumper 20 on the ring 2 contains a slight axial component tending to press the ring 2 against the base plate I. and this component suffices to prevent ejection or blocking of the ring 2 when it is subjected to a force tending to lift it off the base plate I at the exact moment of the datechange.
  • the plate I0 may conveniently be fitted in place with the jumper 7 and the spring 9. with out any risk of losing the spring 9. after which the ring 2 is quickly put in place without any mounting operation or special tools. as explained above.
  • FIG. 3 shows an example of such an embodiment.
  • the retaining plate 10 is divided into at least two parts. one of which. a part 23 constituting a support body. is visible in FIG. 3. It is fastened on the base plate I by a screw 24 and a guide-foot 27, and it holds both the spring 9 and the jumper 7 in place.
  • the plate part 23 comprises a rigid portion which serves to fasten it and to hold the jumper and its spring. and a deformable or resilient arm 25 which ends in a widening in the form of a triangular beak 26 constituting the cover element which enables the ring 2 to be disengaged by relative displacement.
  • the cover element 26 partially covers two of the teeth 3 and is situated at a sufficient distance from the edge of the plate part 23 to enable it to be radially displaced inwardly. by resilient deformation of the blade 25. and to release the ring 2.
  • the size of the blade 25 will be such that it cannot bend in the direction perpendicular to the plane of the drawing but can. on the contrary. be deformed in that plane. It will easily be realized that the object of the invention is likewise achieved by the arrangement shown in FIG. 3.
  • the size of the blade 25 might also be such that it undergoes a permanent deformation when the element 26 is pushed back radially towards the outside after the date-ring has been put in place. and that it remains in the position shown in FIG. 3.
  • FIG. 4 represents a third embodiment of the arrangement described in which the cover element is integral with the jumper.
  • This embodiment utilizes a support body or jumper 28 composed of a rigid piece thicker than the toothing 3 and pivoting about a stud 29.
  • the means which hold the jumper axially are not shown in the drawing, nor is the spring of the jumper 28.
  • the tri' angular point of the jumper 28 has a continuous rim or cover element which follows the two V-shaped flanks of the point and. consequently. in the resting position. covers the points of the two teeth 3 with which the jumper is in contact.
  • cover elements described might also cooperate with an outer toothing of an indicator member.
  • a watch movement comprising a base plate having a protuberant portion. a circular movable indicator member provided with a peripheral toothing and rotatively guided by said protuberant portion of said base plate. a holding plate rigidly secured to said base plate and having an arcuate edge portion extending over an are less than 180 above said toothing. a cover clement extending opposite said edge portion and above said toothing. a stud fastened to said base plate. a support body adapted to pivot about said stud. said cover element being rigidly joined to said support body, and a spring which acts on said support body in such a way that a portion of said body presses against the toothing of the indicator member. whereby said portion of said body acts as a jumper.
  • a watch movement comprising a base plate having a protuberant portion. a circular movable indicator member provided with a peripheral toothing and rotatively guided by said protuberant portion of said base plate. a holding plate rigidly secured to said base plate and having an arcuate edge portion extending over an are less than above said toothing.
  • said holding plate including a support body rigidly secured to said base plate and having a deformable arm. and a cover element extending opposite said edge portion and above said toothing. said cover element being joined to said support body by said deformable arm.
  • a watch movement comprising a base plate having a protuberant portion. a circular movable indicator member provided with a peripheral toothing having a plurality of teeth and rotatively guided by said protuberant portion of said base plate. a holding plate rigidly secured to said base plate and having an arcuate edge portion extending over an are less than 180 above said toothing. a jumper mounted on said base plate. and cover elements extending opposite said edge portion and above said toothing. said cover elements being rigidly connected to said base plate and including projections separated by notches. the shape and distribution of said notches being identical to those of said teeth. said indicator member having a resting position provided by said jumper mounted on said base plate. and each projection extending above one of said teeth when said indicating member is in the resting position.
  • a watch movement according to claim 8 wherein said projections comprise inclined faces at the front ends of the notches. said inclined faces being disposed on the side of the cover elements facing said toothing of said indicator member.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Clamps And Clips (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Micromachines (AREA)
US483435A 1973-07-13 1974-06-26 Watch movement with a circular movable indicator member Expired - Lifetime US3893289A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1026473A CH584928B5 (xx) 1973-07-13 1973-07-13

Publications (1)

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US3893289A true US3893289A (en) 1975-07-08

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ID=4361296

Family Applications (1)

Application Number Title Priority Date Filing Date
US483435A Expired - Lifetime US3893289A (en) 1973-07-13 1974-06-26 Watch movement with a circular movable indicator member

Country Status (5)

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US (1) US3893289A (xx)
JP (1) JPS5335745B2 (xx)
CH (2) CH1026473A4 (xx)
FR (1) FR2237237B1 (xx)
GB (1) GB1471678A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080074952A1 (en) * 2006-09-26 2008-03-27 Eta Sa Manufacture Horlogere Suisse Watch movement including a display ring holding plate
US20080106978A1 (en) * 2004-12-03 2008-05-08 Christophe Claret S.A. Animated Timepiece
US10262623B2 (en) 2015-10-16 2019-04-16 Samsung Electronics Co., Ltd. Methods of operating application processors and display systems with display regions having non-rectangular shapes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH684980B5 (fr) * 1993-04-06 1995-08-31 Ebauchesfabrik Eta Ag Mouvement de montre comprenant une plaque de maintien d'un organe indicateur.
ATE445868T1 (de) 2006-11-14 2009-10-15 Eta Sa Mft Horlogere Suisse Mit einem anzeigemodul ausgerüstetes uhrwerk

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948107A (en) * 1958-05-10 1960-08-09 Buren Watch Company S A Date-watch
US3352103A (en) * 1965-04-20 1967-11-14 Ebauchesfabrik Eta Ag Calendar watch with an instantaneous date-change motion
US3668863A (en) * 1970-07-30 1972-06-13 Suwa Seikosha Kk Jumper member construction in a calendar watch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948107A (en) * 1958-05-10 1960-08-09 Buren Watch Company S A Date-watch
US3352103A (en) * 1965-04-20 1967-11-14 Ebauchesfabrik Eta Ag Calendar watch with an instantaneous date-change motion
US3668863A (en) * 1970-07-30 1972-06-13 Suwa Seikosha Kk Jumper member construction in a calendar watch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080106978A1 (en) * 2004-12-03 2008-05-08 Christophe Claret S.A. Animated Timepiece
US7420883B2 (en) * 2004-12-03 2008-09-02 Christophe Claret S.A. Animated timepiece
US20080074952A1 (en) * 2006-09-26 2008-03-27 Eta Sa Manufacture Horlogere Suisse Watch movement including a display ring holding plate
US7403449B2 (en) 2006-09-26 2008-07-22 Eta Sa Manufacture Horlogère Suisse Watch movement including a display ring holding plate
US10262623B2 (en) 2015-10-16 2019-04-16 Samsung Electronics Co., Ltd. Methods of operating application processors and display systems with display regions having non-rectangular shapes

Also Published As

Publication number Publication date
GB1471678A (en) 1977-04-27
DE2432783A1 (de) 1975-01-30
JPS5055365A (xx) 1975-05-15
CH1026473A4 (xx) 1976-06-30
CH584928B5 (xx) 1977-02-15
JPS5335745B2 (xx) 1978-09-28
DE2432783B2 (de) 1975-08-28
FR2237237A1 (xx) 1975-02-07
FR2237237B1 (xx) 1977-03-11

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