US3745762A - Device for indication of the hour in a timepiece - Google Patents

Device for indication of the hour in a timepiece Download PDF

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Publication number
US3745762A
US3745762A US00215300A US3745762DA US3745762A US 3745762 A US3745762 A US 3745762A US 00215300 A US00215300 A US 00215300A US 3745762D A US3745762D A US 3745762DA US 3745762 A US3745762 A US 3745762A
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US
United States
Prior art keywords
notches
balls
parts
organ
cannon
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
US00215300A
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English (en)
Inventor
H Kocher
P Schmied
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.)
Buren Watch Co SA
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Buren Watch Co SA
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Filing date
Publication date
Application filed by Buren Watch Co SA filed Critical Buren Watch Co SA
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Publication of US3745762A publication Critical patent/US3745762A/en
Anticipated expiration legal-status Critical
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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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/005—Mechanical devices for setting the time indicating means stepwise or on determined values
    • 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
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/221—Arrangements for indicating different local apparent times; Universal time pieces mechanisms for correcting the hours hand only, i.e. independently for minutes and seconds hands
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y10T74/2066—Friction

Definitions

  • the present invention relates to a device for indicating the hour provided for a timepiece and able to be operated from the outside so as to modify the position of the hour hand without moving the cannon pinion or the minute pinion.
  • Watches are already known whose hour indicating device is arranged so that it is possible to move by manual control the hour hand a number of hours without touching the position of the minute hand to permit users of these watches, when they move to different time zones, to set them to local time without having to modify the setting of the minute hand.
  • the known indicating devices generally comprise a coupling connecting two mobile parts which together constitute the hour wheel and which present a certain determined number of relative orientations in which the two mobile parts are solid in rotation with one another. This interlocking is effective only if the couple transmitted from one mobile part to the other is slight. Under the action of a greater couple, the mobile part which carries the hour hand is disengaged from the hour wheel properly socalled and can therefore pass from one orientation to the next.
  • Most of the devices of this type that are already known comprise two mobile parts, each of which comprises a cannon and a circular plate. These two mobile parts are fitted one in the other and pressed axially against one another.
  • the plate of one of the mobile parts carries one or two diametrically opposite studs, which project in the direction of the plate of the other mobile part.
  • This latter presents 12 openings corresponding to the studs and distributed on its entire periphery, the coupling between the two mobile parts being achieved by engagement of the stud or studs in one or two of said openings.
  • the studs are replaced by balls, but the number of the notches provided to receive the balls is also twelve and corresponds to the number of angular positions which the two mobile parts can take in relation to one another.
  • the purpose of the present invention is therefore to permit adjustment of the position of the hour hand of a watch on the indication valid in the time zone in which the wearer of the watch is located, by small-sized means, easy to operate and not disturbing the functioning of the watch.
  • the present invention has for its object a coupling device between two coaxial organs in a watch movement, these organs presenting coaxial circular surfaces kept opposite one another and said sur-' face of first organ presenting housings in each of which is housed a ball solid in rotation with the first organ and pressed against said surface of the second organ by elastic means, characterized in that said surface of the second organ presents notches separated by sliding surface elements and distributed so that each ball can suecessively engage in each of the notches and make the two organs solid with one another against a determined maximum couple, in that the number of balls is at least equal to two and in that the distribution of housings and notches is such that the number of difierent angular orientations in which the two organs can be coupled by engagement of one ball in one of the housings is equal to the product of the number of notches times the number of balls.
  • FIG. 1 is a view in horizontal section, along line [-1 of FIG. 2;
  • FIG. 2 is a section along line II-II of FIG. 1.
  • the drawing shows a wristwatch movement with plate 1 (FIG. 2) carrying in the center of its surface a stud 2 on which pivots cannon pinion 3.
  • This part carries on its upper end minute hand 4 whereas hour hand 5 is mounted on an indicator organ 6 distinct from hour wheel 7 properly so-called and connected to this latter by a coupling described below.
  • Minute wheel 8 is mounted in the usual way on plate 1 and engages, on the one hand, with cannon pinion 3 and, on the other hand, with hour wheel 7.
  • Mobile part 6 comprises a hub which goes around the cannon of wheel 7 and a toothed disk with ratchet 9 which extends immediately above wheel 7.
  • Dial 10 presents a central opening 11 which is enlarged on its internal side and which comes out above a shoulder presented by the cannon of wheel 6.
  • coupling between the two mobile parts 6 and 7 is so designed that these mobile parts remain connected in the axial direction regardless of their relative orientation, at least against the action of weak axial forces.
  • the cannon of hour wheel 7 presents (FIG. 1) six axial grooves 12 distributed at 60 from one another. It further presents a circular groove 13 which is located at midheight of the grooves and whose bottom is curved. The depth of this groove 13 is smaller than that of grooves 12.
  • the part of the hub indicator organ 6 which extends to the height of grooves 12 and groove 13 forms a thin cylindrical wall which is pierced by two openings 14 directed to one another. These openings serve to retain two balls 15 whose radii of curvature are equal to the radius of the bottom of groove 13 and which are kept in place by a spring blade I6 bent in the general shape of a U.
  • the two approximately straight branches of this spring blade are connected by a rounded part which surrounds a pin 17 fixed in the disk of mobile part 6.
  • the ends of the two branches of spring 16 are bent inward at such an angle that they apply radially against the parts of balls 15 going beyond the outside surface of the hub of mobile part 6.
  • connection between the two mobile parts is therefore perfectly assured but all that is required is to exert a very slight relative couple between the two parts of the mobile hour part for the ball engaged in groove 12 to come out against the action of spring 16, so that mobile parts 6 and 7 turn in relation to one another until the other ball goes into one of two grooves 12 in the vicinity of which it is located.
  • the assembly of organs 6 and 7 therefore can take a dozen different relative orientations.
  • a correction mechanism which principally comprises a bent lever 18 that can be operated by a push rod 19 against the action of a spring 20.
  • Lever 18 is mounted on plate 1 but is housed in a recess presented by an upper bridge 21 placed between dial l and the plate.
  • This bridge carries a pivot stem 22 which goes through an extended opening 23 made in the bend of lever 18.
  • One of the arms of this lever extends to the vicinity of the periphery of the movement and its free end is acted on by the end of spring wire 20 bent in U-shape and attached by its other end in a hole 24 made in bridge 21.
  • Push rod 19 which is mounted on the case, acts on a bent part 25 of the outside arm of lever 18 so that it rests on this outside arm between the end on which spring 20 presses and extended opening 23 which permits pivoting of the lever.
  • the second arm of this lever extends in the radial direction to the vicinity of teeth 9 of mobile part 6.
  • This inside end of lever 18 forms a nose 26 intended to engage in teeth 9 by pivoting counterclockwise.
  • the back face of nose 26 forms a sharp angle with its front face, that is fairly radial in normal position and, as can be seen in FIG. 1, it rests against a stop 27 which is formed by a part projecting from bridge 21 edging the groove in which lever 18 is engaged.
  • This stop 26, and the arrangement of spring 20 and extended opening 23, assure an extremely simple functioning of the correction mechanism.
  • a pressure exerted on the push rod causes a correction of the position of the hour hand, the movement being approximately equal to 1 hour.
  • push rod 119 is released at the end of the correction movement, mobile part 6 comes into its final position which is given by one of balls 15 engaging in a groove 112.
  • spring 20 tends to make mobile organ 1% turn clockwise, and to push it outward in translation.
  • the end of nose 26 and its back face are guided, on the one hand, by an inclined side of the preceding tooth of teeth 9, and, on the other hand, by stop 27.
  • lever 18 is kept in a clearly determined position under the single action of spring 20.
  • the end of its outside arm rests against shoulder 28 made in bridge 21, whereas nose 26 rests against stop 27.
  • Pin 22 is approximately in the center of the extended opening 23.
  • the means of controlling indicator organ 6 could be different from what has been shown in the drawing.
  • the correction organ the watch stem brought in a suitable position.
  • the coupling mechanism described above could also be designed differently, while using one or more balls solid in rotation with the mobile parts and kept pressed against a surface of the other mobile part.
  • the number of grooves and balls could be different from what has been shown in the drawing.
  • the coupling could be achieved with practically the same dimensions.
  • orientations of three of these openings in relation to the fourth could be, for example, and 225, respectively.
  • the main advantage of the mechanism described above is that it achieves a very precise coupling of two mobile parts which form the hour wheel while requiring only a very slight couple to achieve the disengagement and a relative rotation of the mobile parts.
  • a watch movement comprising an hour mobile organ, said organ including two coaxial parts coupled to one another by a coupling device that can make these two mobile organs solid in 12 or 24 different orientations against a given limit couple, an hour hand carried by one of said parts, a control device acting directly on said one part and maneuverable from the outside of the movement, said control device including a bent lever carried by said movement for pivoting movement about two axes, a spring engaging the end of one of the arms of said lever and defining therewith one of said pivotal axes, means carried adjacent the opposite end of said one arm defining the other pivotal axis for said lever, and a control organ acting on said one arm between said pivotal axes, teeth carried about said one part, the end of the other lever arm being engageable with said teeth to modify the orientation of said hour hand from one position to a neighboring position under the action of a pressure exerted on the control organ.
  • the device according to claim 4 characterized in that the inside cannon presents six axial notches distributed at 60 to one another and in that the outside cannon presents two openings spaced at 150' with each opening containing a ball.
  • a watch movement comprising an hour wheel including first and second coaxially arranged parts rotatable relative to one another, one of said parts carrying an hour hand, means for coupling said parts one to the other for conjoint rotary movement in one of 12 different relative angular orientations, said coupling means including a pair of balls carried by and spaced circumferentially about one of said parts, the other of said parts having six notches spaced circumferentially thereabout, said balls and said notches being arranged such that said balls alternately engage respective successive notches as said parts rotate relative to one another, whereby each ball engages in each successive notch for a full 360 rotation of said parts relative to one another.
  • a coupling device for a watch movement comprising inner and outer relatively rotatable concentric cannons, said outer cannon carrying for rotation therewith at least a pair of balls spaced circumferentially thereabout, said inner cannon having a circular surface containing a plurality of axially extending, radially outwardly facing notches circumferentially spaced thereabout and spaced one from the other by a circular groove, said notches being deeper in radial extent from said surface than said grooves, means for urging said balls inwardly for engagement in said notches and said circular groove, said balls and notches being arranged such that said balls alternately engage respective successive notches as said parts rotate relative to one another, said cannons being coupled for conjoint rotary movement when one of said balls engages in a notch, the number of difierent relative angular orientations of said cannons in which said cannons lie in'dn'ving relation one to the other being equal to the product of the number of notches times the number of balls.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Toys (AREA)
US00215300A 1971-01-28 1972-01-04 Device for indication of the hour in a timepiece Expired - Lifetime US3745762A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH124671A CH557556A (de) 1971-01-28 1971-01-28

Publications (1)

Publication Number Publication Date
US3745762A true US3745762A (en) 1973-07-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00215300A Expired - Lifetime US3745762A (en) 1971-01-28 1972-01-04 Device for indication of the hour in a timepiece

Country Status (4)

Country Link
US (1) US3745762A (de)
JP (1) JPS5424670B2 (de)
CH (2) CH557556A (de)
DE (1) DE2161802A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877217A (en) * 1974-09-19 1975-04-15 Paul E Hochstrate Digital watch switch detent device
US4109547A (en) * 1977-01-17 1978-08-29 Caterpillar Tractor Co. Detent mechanism
US4266693A (en) * 1979-06-11 1981-05-12 Pfeiffer N Leonard Portable fuel and oil dispenser
FR2778759A1 (fr) * 1998-05-18 1999-11-19 Finance De Clairbois Bruno De Dispositif d'indication de l'heure pour de multiples fuseaux horaires
US20090016174A1 (en) * 2005-03-06 2009-01-15 Lange Uhren Gmbh Watch
WO2022122569A1 (fr) * 2020-12-07 2022-06-16 Chronode Sa Dispositif d'affichage de l'heure dans un fuseau horaire predefini pour mouvement horloger

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51142368A (en) * 1975-06-02 1976-12-07 Toshikuni Nihonmatsu Divice to determine positions of minute and second hands of clock
JPS55122178A (en) * 1979-03-14 1980-09-19 Ricoh Elemex Corp Hour indication correction mechanism for timepiece
DE3011666A1 (de) * 1980-03-26 1981-10-01 Kieninger & Obergfell Fabrik für technische Laufwerke und Apparate, 7742 St Georgen Elektrische uhr mit analoger zeitanzeige
DE3011667A1 (de) * 1980-03-26 1981-10-01 Kieninger & Obergfell Fabrik für technische Laufwerke und Apparate, 7742 St Georgen Elektrische uhr mit analoger zeitanzeige
CH646568GA3 (en) * 1982-10-22 1984-12-14 Dial train with a device for adjusting clock hands in whole time units
CH655221GA3 (en) * 1984-03-29 1986-04-15 Universal wristwatch

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877217A (en) * 1974-09-19 1975-04-15 Paul E Hochstrate Digital watch switch detent device
US4109547A (en) * 1977-01-17 1978-08-29 Caterpillar Tractor Co. Detent mechanism
US4266693A (en) * 1979-06-11 1981-05-12 Pfeiffer N Leonard Portable fuel and oil dispenser
FR2778759A1 (fr) * 1998-05-18 1999-11-19 Finance De Clairbois Bruno De Dispositif d'indication de l'heure pour de multiples fuseaux horaires
EP0959392A1 (de) * 1998-05-18 1999-11-24 De Finance de Clairbois, Bruno Zeitanzeigevorrichtung zum Anzeigen verschiedener Ortszeiten
US20090016174A1 (en) * 2005-03-06 2009-01-15 Lange Uhren Gmbh Watch
US8036066B2 (en) * 2005-03-06 2011-10-11 Lange Uhren Gmbh Watch
WO2022122569A1 (fr) * 2020-12-07 2022-06-16 Chronode Sa Dispositif d'affichage de l'heure dans un fuseau horaire predefini pour mouvement horloger

Also Published As

Publication number Publication date
JPS5424670B2 (de) 1979-08-22
DE2161802A1 (de) 1972-08-17
CH557556A (de) 1974-12-31
JPS4833857A (de) 1973-05-14
CH124671A4 (de) 1974-07-31

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