US3879929A - Digital-display watch movement - Google Patents

Digital-display watch movement Download PDF

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Publication number
US3879929A
US3879929A US498429A US49842974A US3879929A US 3879929 A US3879929 A US 3879929A US 498429 A US498429 A US 498429A US 49842974 A US49842974 A US 49842974A US 3879929 A US3879929 A US 3879929A
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United States
Prior art keywords
indicator
watch movement
accordance
indicator member
bridge
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Expired - Lifetime
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US498429A
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English (en)
Inventor
Adrien Maurice Charbonney
Legal Representative J Therens
Urs Giger
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.)
Ebauchesfabrik ETA AG
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Ebauchesfabrik ETA AG
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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
    • G04B19/20—Indicating by numbered bands, drums, discs, or sheets
    • G04B19/202—Indicating by numbered bands, drums, discs, or sheets by means of turning discs

Definitions

  • DIGITAL-DISPLAY WATCH MOVEMENT Inventors: Adrien Maurice Charbonney, deceased, late of Saint Blaise, Switzerland; Jean-Jacques Therens, legal representative, Saint-Blaise, Switzerland; Urs Giger, Solothurn, both of Switzerland Assignee: Eta A.G. Ebacuhes-Fabrik,
  • DIGITAL-DISPLAY WATCH MOVEMENT This invention relates to a digital-display watch movement comprising a base plate, a dial provided with at least one aperture, and three coaxial jumping indicator members visible in the aperture or apertures, the first indicator member indicating the tens figures of the minutes, the second indicator member indicating the units figures of the minutes, and the third indicator member indicating the hours.
  • the aperture in which these indications appear must be sufficiently large to enable a section of the periphery of the minute-disc covering at least to minutes to be visible. This represents an obstacle to a sensible and convenient presentation in a watch movement of this type.
  • the digital-display watch movement further comprises three continuously rotating driving members, each associated with one of the indicator members to form with it a pair of coaxial rotating parts coupled to one another by a spring. These pairs being superimposed between the dial and the base plate, the first indicator member extending immediately beneath the dial, and further comprises a display bridge and three levers acting as pallets and pivoting on the bridge, each lever cooperating with one of the indicator members to release it periodically, the first of the levers being actuated by the second indicator member, the second of the levers being actuated by the driving member of the second of the pairs of rotating parts, and the third of the levers being actuated by the first indicator member.
  • FIG. 1 is a top plan view of the movement with certain parts omitted in order to facilitate understanding of the drawing, and
  • FIG. 2 is a section taken on the line ll-Il of FIG. I.
  • the display mechanism of the watch movement illus' trated will be described below.
  • the remainder of the movement is of a classic design, a base plate 1 of which will be seen in FIG. 2.
  • Fixed at the center of the base plate 1 is a pipe 2 which guides a center seconds-arbor 3.
  • a cannon-pinion 4 on which a center wheel 5 is fastened.
  • the wheel 5 is engaged on a cylindrical bearing surface of the cannon-pinion 4 so as to produce a friction coupling between these two rotating parts.
  • the wheel-and-pinion 4, 5 is connected to the wheel-train of the movement, by means which are not shown, and rotates at the rate of l revolution per hour.
  • the cannon-pinion 4 meshes with the wheel of a minute wheel-and-pinion 6 pivoting on a shaft 7 fastened to the base plate 1 as in a conventional movement. It is also coupled to a mechanism for driving an indicator member, as will be seen further on.
  • a display bridge 8 Fastened on th base plate 1 is a display bridge 8 having a cup-shaped middle portion and an annular wall 9 at its periphery.
  • the foot of the wall 9 rests in an undercut in the base plate 1, and the bridge 8 is fastened to the base plate I by screws.
  • Various openings are made in the bridge 8. It carries the entire display mechanism as well as a dial (not shown) provided with a center opening and four apertures 11, l2, l3, and 14 in which the indicator members appear. Through the center opening in the dial, it is possible to fasten to the upper end of the arbor 3 a seconds-hand which will move above the dial.
  • the indications which appear in the apertures 11 and 12 are the indications of the minutes and of the hours, respectively.
  • the minute indications are themselves divided between two indicator members, the first of which, 15, bears the tens fig arcs of the minutes from 0 to 5, and the second of which, 16, bears the units figures of the minutes from O to 9. These two members are coaxial, and the second member 16, larger in diameter than the member 15, is situated below the latter.
  • the hour indications are borne by a third indicator member 17, which is appreciably larger in diameter than the member 16 and extends beneath the bridge 8, whereas the other two indicator members 15 and 16 are above the bridge 8.
  • the indicator member 15 is in the shape of a hexagon having teeth 18 at each of its corners; the function of the teeth l8 will be explained further on.
  • a tongue 19 partially blanked out of the member 15 and bent obliquely upwards. The function of this tongue 19 will also be explained further on.
  • the indicator member 16 is circular and bears the units figures of the minutes distributed equidistantly along its periphery.
  • the lower face of the member 16 is provided with a rib 20 situated slightly back from its periphery.
  • the rib 20 follows a circular path along practically its entire extent; but at one place, the path of the rib 20 shifts outward to form a hump 21 (FIG. 1).
  • the indicator member 16 also has a star-toothing 22, comprising five trapezoidal teeth, projecting from its lower face.
  • the third indicator member 17 is cup-shaped, like the bridge 8, its periphery being raised so as to extend immediately beneath the periphery of the bridge 8.
  • the periphery of the member 17 is blanked and presents l2 radial projections 23, each of which bears one of the figures from I to 12.
  • the arrangement of the figures on the indicator members 15, 16, and 17 is such that the time in hours and minutes appears in the apertures 12 and 11 in the form of digits of equal size and in the logical sequence, i.e., hour and minute from left to right.
  • the aperture 12 is disposed to the left of the center when the movement is viewed from above, and the aperture 11 is to the right of and closer to the center.
  • the indications borne by the tens-ofminutes disc 15 appear to the left of the indications borne by the units-of-minutes disc 16.
  • the apertures 14 and I3 are disposed on either side of the radial projection 23 opposite the one appearing in the aperture 12.
  • the indication of the date borne by a conventional date-ring 24 mounted on the base plate 1 and driven by a calendar mechanism (not shown).
  • the size of the date figures is such that they are visible in the aperture 14 through the space left free between two projections 23.
  • the movement being described comprises a day-indicator member 25, likewise blanked as a star which may have 7 or 14 teeth. Each of these teeth bears the abbreviation in letters of one of the days of the week.
  • the blanked disc 25 extends beneath the third indicator member 17 and above the date-ring 24. It is so positioned that one of its indications appears in the aperture 13. Under these conditions, no other tooth of the disc 25 hides the date-ring 24.
  • the calendar mechanism which drives the members 24 and 25 will not be described here inasmuch as it is a conventional one.
  • Each of the members l5, l6, and I7 is coupled to a driving member by means of a coupling comprising a spring which enables the respective indicator member and driving member to shift temporarily with respect to one an other.
  • the driving member rotates continuously. so that when the indicator member is blocked, the spring is gradually tensed.
  • the indicator member advances by one step under the effect of the spring and catches up with its driving member.
  • the opening thus formed corresponds to a hollow 31 made in the edge of the inside opening of the disc 15.
  • An arcuately curved spring-blade 32 the two ends of which are folded back outwardly, is fastened to one end of the rib 30, on the one hand, and to one end of the hollow 31, on the other hand. It is held between the two coupling plates 29 so that the disc 15 may rotate by about 60 with respect to its driving member 28, and this corresponds to the angle through which the disc 15 jumps every minutes.
  • the driving member 28 of the disc rotates continuously at the rate of one revolution per hour.
  • it is connected to the cannon-pinion 4 by a coupling sleeve 33 housed in the pipe 27.
  • the lower end of the sleeve 33 is provided with projecting jaws which are engaged in corresponding slots in the pipe of the cannon-pinion 4.
  • the upper end of the sleeve 33 likewise has projecting tongues forming coupling jaws bent outwardly over the end of the pipe 27 and engaged in slots in the pipe of the cannon-pinion 28. Thanks to this gimbal-like coupling device. Any lack of parallelism between the axes of the guide-pipe 27 and the pipe 2 is compensated.
  • the tens cannon-pinion 28 is therefore continously driven in rotation. lts wheel meshes with the pinion of a transmission wheel-and-pinion 34 which pivots on a stud 35 integral with the bridge 8. The wheel of this wheel-and-pinion 34 meshes with a pinion 36 which is engaged on the pipe of the tens cannonpinion 28.
  • the pinion 36 constitutes the driving member of the second indicator member 16. On a truncated portion of its toothing, it carries a pair of coupling plates 37 and 38.
  • the spring coupling between the pinion 36 and the disc 16 is exactly the same size and is made up in exactly the same way as the coupling between the pinion 28 and the disc 15.
  • the plate 38 comprises an annular rib interrupted over part of its length, within which is a tensed spring-blade 39 hooked to the rib and to the disc 16.
  • the details of this device need not be described here. It should be pointed out, however, that the periphery of the coupling plate 38 has a cam profile 40 formed of five lugs situated immediately below the star-toothing 22.
  • a third spring coupling is provided between the hour-indicating disc 17 and its driving member 41.
  • the latter is made in one piece with a coupling plate and with a hub which bears another coupling plate. It pivots on the lower hub 26 of the bridge 8, and its peripheral toothing is engaged with the pinion of the minute-wheel 6.
  • the driving member 4] therefore completes one revolution every 12 hours.
  • a spring-blade 42 the arrangement of which is the same as that of the springblades 39 and 32, makes it possible to block the disc 17 for one hour, corresponding to a rotation of the member 41 through an angle of 30.
  • the member 17 can be released once every hour. and it makes a jump allowing the indication of the succeeding hour to appear in the aperture 12.
  • levers 46, 43, and 53 each of which connects one of the indicator members to its control cam.
  • the first to be described will be the second lever, 43, which cooperates with the second indicator member 16. It pivots on a stud 44 fastened to the bottom of the cup-shaped portion of the bridge 8.
  • the lever 43 is held axially in place by a retaining plate 45 which is fastened to the bridge 8 and likewise holds in place the tens cann0n pinion 28 and the transmission wheel-and-pinion 34.
  • the lever 43 comprises two arcu ate arms which embrace the star-toothing 22 of the disc 16 and the cam profile 40 of the driving member 37.
  • Each of the lugs of the cam profile 40 successively guides the end of each of the two arms of the lever 43 and hence controls a double rocking movement of that lever. At the moment when it arrives at its final phase. each rocking movement releases a tooth of the toothing 22, which enables the disc 16 to jump forward through an angle of 36 and consequently to cause the succeeding units figure of the minutes to appear in the aperture 11.
  • the rotation of the pinion 36 which takes place at a speed of one revolution every 10 minutes owing to the wheel-and-pinion 34, the cannon-pinion 28, and the center wheel-and-pinion 4, 5, causes, via the lugs of the cam profile 40 and the spring coupling described, the tensing of the spring 39 and then the release of the disc 16, which advances by one step every minute.
  • the result is that the lever 46 remains stationary as long as the circular portion of the rib 20 passes between the feelers 49 and 50, but it oscillates to and fro when the hump 21 passes between those feelers.
  • the operation of this part is analogous to that of a pallet although it is made up quite differently.
  • the plate 46 of which the lever consists is blanked with a second tongue 51 folded back edgewise, the bent end 52 of which (FIG. 1) constitutes a stop member cooperating with the teeth or stop elements 18 of the first indicator member 15.
  • the stop element 52 releases the disc 15, then immediately resumes its position.
  • the spring 32 relaxes, causing the disc to rotate, and the following stop element 18 comes to strike against the end 52 of the tongue 51.
  • the disc 15 rotates in jumps at the same average speed as the cannon-pinion 28 and the cannon-pinion 4, and the tens figures of the minutes from 0 to 5 appear successively in the left-hand half of the aperture 11.
  • the lever 53 Upon each revolution of the first indicator member 15, the raised tongue 19 actuates the third lever 53, which will release the third indicator member 17 and allow the hour indication appearing in the aperture 12 to advance by one unit.
  • the lever 53 likewise consists of a blanked and bent metal plate. It pivots on another collect of the bridge 8 and is held in place by a screw 54. its shape is that of a star with four arms of irregular size and distribution. Two of these arms, 55 and 56, are bent slightly upwards and directed towards the center of the movement.
  • the arm 55 is the one which is intended to cooperate with the tongue 19 of the indicator member 15.
  • the second arm 56 has a triangular end in the shape of a jumper. It is situated at the level of the stop elements 18 and cooperates with them as will be explained below.
  • the remaining two arms, 57 and 58 extend towards the outside of the movement and are bent downwards so that the one cooperates with one of the projections 23 of the disc 17, and the other cooperates with the adjacent projection 23.
  • the operation of the lever 53 will now be described. Normally, it is held stationary because the end of the arm 57 is hooked on one of the projections 23; but even in the case of a shock, no accidental disengagement can take place, for if the lever 53 were to start rotating counterclockwise, as viewed in FIG. 1, which would be liable to disengage the indicator member 17, the arm 56 would immediately come to strike against one of the stop elements 18. On the other hand, when the member 15 is in the position shown in FIG.
  • the mechanism described comprises in a very compact form all of the elements necessary to actuate by jumps three indicator members giving the units and tens figures of the minutes plus the hours.
  • the means for driving the calendar members may be connected to the driving member 41, which acts as a conventional hour-wheel.
  • a transmission wheeland-pinion 59, pivoting on the base plate 1 may be seen in the drawing.
  • the various elements of the mechanism are so arranged as to lock one another so that no untimely jump is possible.
  • the indication of the hour is controlled by the tens-of-minutes disc and consequently changes only when the indication of the tens figure of the minute passes from 5 to 0. This precludes any accidental error of 1 hour which would be possible if the members were controlled independently of one another.
  • the entire display mechanism comprises just three springs, so that the burden on the mainspring is reduced to a minimum.
  • a digital-display watch movement comprising a base plate, a dial provided with at least one aperture, and three coaxial jumping indicator members visible in said aperture or apertures, the first said indicator me mber indicating the tens figures of the minutes, the second said indicator member indicating the units figures of the minutes, and the third said indicator member indicating the hours, further comprising three continuously rotating driving members, each associated with one of said indicator members to form with it a pair of coaxial rotating parts coupled to one another by a spring, said pairs being superimposed between said dial and said base plate, said first indicator member extending immediately beneath said dial, and further comprising a display bridge and three levers acting as pallets and pivoting on said bridge, each lever cooperating with one of said indicator members to release it periodically, the first of said levers being actuated by said second indicator member, the second of said levers being actuated by the driving member of the second of said pairs of rotating parts, and the third of said levers being actuated by said first indicator member.
  • a watch movement in accordance with claim 1, wherein the second of said driving members comprises a cam countour of five lugs regularly distributed along its periphery, and each of said lugs actuates said lever twice in the course of one complete rotation of the second of said driving members.
  • said first indicator member comprises a release member actuating said third lever once during each complete rotation of said first indicator member
  • said second indicator member comprises a release member actuating said first lever once during each complete rotation of said second indicator member
  • a day-indicating member having its periphery blanked in a star shape, said day-indicating member being disposed between said third indicator member and said date-indicating member, the outside diameter ofa circle described by day indications borne by said day-indicting member being the same as that of said date-indicating member, said day indications appearing in a said aperture and between two said projectionsv 8.
  • said first indicator member is guided in rotation by a cylindrical surface of the first of said driving members, said bridge comprises a projecting tubular portion whereon said first driving member is engaged, and a coupling member housed within said tubular portion connects said first driving member to a center wheel-and-pinion' mounted on said base plate.
  • said first driving member comprises a pipe engaged on said tubular portion, said second pair of rotating parts pivots on said pipe, said pipe being integral with a toothed wheel, and said bridge carries a transmission wheel-and-pinion actuated by said toothed wheel and actuating the second of said driving members.
  • each end of said coupling member comprises projections engaged with play in notches provided respectively in a hub of said center wheel-andpinion and in said pipe so as to constitute a gimbal-type coupling.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Toys (AREA)
US498429A 1973-08-20 1974-08-19 Digital-display watch movement Expired - Lifetime US3879929A (en)

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Application Number Priority Date Filing Date Title
CH1195773A CH583431B5 (en, 2012) 1973-08-20 1973-08-20

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US3879929A true US3879929A (en) 1975-04-29

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US498429A Expired - Lifetime US3879929A (en) 1973-08-20 1974-08-19 Digital-display watch movement

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US (1) US3879929A (en, 2012)
CH (2) CH583431B5 (en, 2012)
FR (1) FR2257935B1 (en, 2012)
GB (1) GB1470875A (en, 2012)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063411A (en) * 1975-11-06 1977-12-20 Pforzheimer Uhren-Rohwerke Rudolf Wehner Stepping mechanism
EP0327513A1 (en) * 1988-02-01 1989-08-09 GIANNI BULGARI S.p.A. A timepiece
WO2001077756A1 (de) * 2000-04-08 2001-10-18 Glashütter Uhrenbetrieb GmbH Kalendermechanismus für ein uhrwerk
US20050286348A1 (en) * 2004-06-28 2005-12-29 De Grisogono Large date display device
JP2006501451A (ja) * 2002-10-01 2006-01-12 マニファクテュール ロジェ デュビュイ エス アー 機械的な時間及び分の表示装置
US20090040880A1 (en) * 2005-08-17 2009-02-12 Jean-Francois Ruchonnet Clock movement comprising indicators for displaying units and tens
US20100103780A1 (en) * 2008-10-24 2010-04-29 Eta Sa Manufacture Horlogere Suisse Device that assists in maintaining the position of a date indicator disc for a timepiece
US20140036640A1 (en) * 2012-07-31 2014-02-06 Casio Computer Co., Ltd. Information display device and analog electronic timepiece
US9429914B2 (en) 2014-12-11 2016-08-30 Blancpain Sa Mechanism for driving a jumping element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3032348A1 (fr) * 2014-12-11 2016-06-15 Blancpain SA. Mécanisme d'entraînement d'un organe sautant

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US347139A (en) * 1886-08-10 thommen
US402823A (en) * 1889-05-07 Electric clock
US1792435A (en) * 1929-04-13 1931-02-10 Mcleary Eddie Clock
US1935842A (en) * 1930-07-16 1933-11-21 Albert E Freel Time indicating device
US2130873A (en) * 1938-02-23 1938-09-20 Warren Telechron Co Rotating dial numeral clock
US2633696A (en) * 1944-11-22 1953-04-07 Casco Products Corp Cyclometer clock
US3653202A (en) * 1970-02-11 1972-04-04 Zodiac Timepiece
US3827231A (en) * 1973-01-08 1974-08-06 Foerster Bernhard Fa Wrist watch for digital indication

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US347139A (en) * 1886-08-10 thommen
US402823A (en) * 1889-05-07 Electric clock
US1792435A (en) * 1929-04-13 1931-02-10 Mcleary Eddie Clock
US1935842A (en) * 1930-07-16 1933-11-21 Albert E Freel Time indicating device
US2130873A (en) * 1938-02-23 1938-09-20 Warren Telechron Co Rotating dial numeral clock
US2633696A (en) * 1944-11-22 1953-04-07 Casco Products Corp Cyclometer clock
US3653202A (en) * 1970-02-11 1972-04-04 Zodiac Timepiece
US3827231A (en) * 1973-01-08 1974-08-06 Foerster Bernhard Fa Wrist watch for digital indication

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063411A (en) * 1975-11-06 1977-12-20 Pforzheimer Uhren-Rohwerke Rudolf Wehner Stepping mechanism
EP0327513A1 (en) * 1988-02-01 1989-08-09 GIANNI BULGARI S.p.A. A timepiece
US4991154A (en) * 1988-02-01 1991-02-05 Gianni Bulgari S.P.A. Timepiece
WO2001077756A1 (de) * 2000-04-08 2001-10-18 Glashütter Uhrenbetrieb GmbH Kalendermechanismus für ein uhrwerk
US6574167B2 (en) * 2000-04-08 2003-06-03 Glashutter Uhrenbetrieb Gmbh Calendar mechanism for a clock work
RU2234724C2 (ru) * 2000-04-08 2004-08-20 Гласхюттер Уренбетриб Гмбх Календарное устройство для часового механизма
JP2006501451A (ja) * 2002-10-01 2006-01-12 マニファクテュール ロジェ デュビュイ エス アー 機械的な時間及び分の表示装置
US7133328B2 (en) * 2004-06-28 2006-11-07 De Grisogono Large date display device
US20050286348A1 (en) * 2004-06-28 2005-12-29 De Grisogono Large date display device
US20090040880A1 (en) * 2005-08-17 2009-02-12 Jean-Francois Ruchonnet Clock movement comprising indicators for displaying units and tens
US8004936B2 (en) * 2005-08-17 2011-08-23 Richemont International S.A. Clock movement comprising selectable indicators
US20100103780A1 (en) * 2008-10-24 2010-04-29 Eta Sa Manufacture Horlogere Suisse Device that assists in maintaining the position of a date indicator disc for a timepiece
US8040759B2 (en) * 2008-10-24 2011-10-18 Eta Sa Manufacture Horlogère Suisse Device that assists in maintaining the position of a date indicator disc for a timepiece
US20140036640A1 (en) * 2012-07-31 2014-02-06 Casio Computer Co., Ltd. Information display device and analog electronic timepiece
US8971153B2 (en) * 2012-07-31 2015-03-03 Casio Computer Co., Ltd. Information display device and analog electronic timepiece
US9429914B2 (en) 2014-12-11 2016-08-30 Blancpain Sa Mechanism for driving a jumping element

Also Published As

Publication number Publication date
GB1470875A (en) 1977-04-21
CH583431B5 (en, 2012) 1976-12-31
FR2257935B1 (en, 2012) 1976-12-31
CH1195773A4 (en, 2012) 1976-05-14
FR2257935A1 (en, 2012) 1975-08-08
DE2439401B2 (de) 1975-09-25
DE2439401A1 (de) 1975-03-27

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