WO2017141101A1 - Dispositif de cadence - Google Patents

Dispositif de cadence Download PDF

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Publication number
WO2017141101A1
WO2017141101A1 PCT/IB2017/000115 IB2017000115W WO2017141101A1 WO 2017141101 A1 WO2017141101 A1 WO 2017141101A1 IB 2017000115 W IB2017000115 W IB 2017000115W WO 2017141101 A1 WO2017141101 A1 WO 2017141101A1
Authority
WO
WIPO (PCT)
Prior art keywords
cam
cadence
pallet fork
cadence device
regulation wheel
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.)
Ceased
Application number
PCT/IB2017/000115
Other languages
English (en)
Inventor
Rémi Daniel Louis MAILLAT
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.)
Preciflex SA
Original Assignee
Preciflex SA
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 Preciflex SA filed Critical Preciflex SA
Publication of WO2017141101A1 publication Critical patent/WO2017141101A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/22—Compensation of changes in the motive power of the mainspring
    • G04B1/225—Compensation of changes in the motive power of the mainspring with the aid of an interposed power-accumulator (secondary spring) which is always tensioned

Definitions

  • This invention relates to an improvement to a drive mechanism in a watch movement.
  • Prior art devices typically use a single energy source and a gear train that drives both the regulating device and additional mechanisms. However, this double duty results in a degradation in accuracy.
  • Watch movements with multiple energy requirements are well known and suffer from the problem of synchronizing the motion of the gear train(s) that drives additional mechanisms with the gear train(s) that drives the regulating device and that counts oscillations.
  • This invention relates to an improvement to drive mechanisms in a watch movement. Instead of using a single energy source and gear train that drive both the regulating device and additional mechanisms, the invention uses a separate energy source and gear train for each. Although watch movements with multiple energy sources are well known, they suffer from the difficulty of synchronizing the motion of the gear train that drives additional mechanisms with the gear train that drives the regulating device and counts oscillations.
  • the watch movement of the invention includes one energy source which supplies the isochronal oscillating system (the regulator), using a transmission gear.
  • the movement includes one other energy source, supplying energy to additional mechanisms, or to a display mechanism of hours and minutes, by a transmission which is composed of a wheel referred to as the "regulation wheel", of which one tooth is in contact with the pallet fork, called the regulation pallet fork, which locks the wheel against rotation.
  • a transmission which is composed of a wheel referred to as the "regulation wheel”, of which one tooth is in contact with the pallet fork, called the regulation pallet fork, which locks the wheel against rotation.
  • a cam is linked to a gear of a primary gear train which connects a primary energy source to the regulating device mechanism, either directly integrally, for example, via one of the gears of this gear train or alternatively by the intermediary of an auxiliary gear.
  • the cam is secured on one of the mobiles of this gear, or could also be secured on an auxiliary gear.
  • the cam drives the regulation pallet fork and provides its periodic motion.
  • This cam and the regulating pallet fork could be of various shapes based on the period of the pallet fork per cam rotation and the amplitude of the movement of the pallet fork needed for a particular application.
  • the regulation pallet fork In its periodic motion, the regulation pallet fork frees the regulation wheel and allows a half-tooth to escape. In other words, the regulation wheel rotates until the pallet fork locks on a tooth.
  • the number of teeth of the regulation wheel number may be from one to any number.
  • the system made up of the regulation pallet fork and regulation wheel permits the freeing, via periodic impulses, of the secondary gear dedicated to supply energy to complications, driven by a secondary energy source, synchronized with the main oscillating and isochronal system energized by the primary energy source, without influencing its chronometric performance.
  • An object of the invention is to solve the particular problem of synchronizing watch movement and ancillary time keeping mechanisms.
  • Another object of the invention is to provide a new way to connect the gear train used to drive particular mechanisms and the gear train used to drive the regulating device, to be able to drive energy demanding mechanisms without significant influence on the regulation of the time piece.
  • FIG. 1 is a plan view of the first phase of lock and approach.
  • FIG. 2 is a plan view of the second phases of jump and approach.
  • FIG. 3 is a plan view of the third phases of lock and exit.
  • FIG. 4 is a plan view of the fourth phases of jump and exit.
  • FIG. 5 is a schematic view of the different functional components of the cadence device.
  • FIG. 6 is a plan view of one variant of the cam of the invention.
  • FIG. 7 is a plan view of a second variant of the cam of the invention.
  • FIG. 8 is a plan view of a third variant of the cam of the invention.
  • FIG. 9 is a plan view of a fourth variant of the cam of the invention.
  • FIG. 10 is a plane view of an alternate embodiment of the invention, using two cams.
  • FIG. 11 is a pian view of a second alternate embodiment having one cam and one follower.
  • FIG. 12 is a plan view of a third alternate embodiment in which the main transmission gear is indirectly connected to the cam.
  • phase 1 lock-approach, the cam 1 turns in counterclockwise direction in the instant illustration and pushes a follower 12 and consequently guides the pallet fork 2 in an approach position where the pallet 3 is in contact with a tooth of the regulation wheel 5.
  • the regulation wheel 5 features one or more teeth 15.
  • the teeth 15 might be positioned at the exterior or interior of the rim 16.
  • the instant illustration shows the teeths 15 at the exterior of the rim 16.
  • the regulation wheel 5, even though driven by the secondary gear train 6, remains stationary by virtue of its contact with the approaching pallet 3.
  • This phase lasts sufficiently long for the angular position of the cam 1 to give to the pallet fork 2 a position which permits maintaining the contact between the approaching pallet 3 and the regulation wheel 5.
  • phase 2 jump-approach, at the end of phase 1, the cam 1 turns in a counterclockwise direction in the instant illustration and pushes a follower 13 and consequently guides the pallet fork 2 around its pivot point 30 such that contact flanks la between the approach pallet 3 and the regulation wheel 5 is lost.
  • the regulation wheel 5 is now free and begins its movement (in a counterclockwise direction in the instant illustration), driven by the secondary drive train 6.
  • This phase 2 ends when a tooth of the regulation wheel 5 enters into contact with the exit pallet 4 of the pallet fork 2.
  • contact surface of the follower 12, 13 can be straight, convex or concave to correspondent with the form of the fanks la, la', la", la'" of the cam(s) 1.
  • phase 3 lock-exit, at the end of phase 2, one of the teeth of the regulation wheel 5 contacts the exit pallet 4 of the pallet fork 2.
  • the regulation wheel 5 remains essentially stationary by this contact, while the angular positions of the cam 1 during further turning in the counterclockwise direction in the instant illustration, which guides the pallet fork 2 through the followers 12, 13, which permits the maintenance of this contact.
  • phase 4 jump-exit, at the end of phase 3, contact between the regulation wheel 5 and the exit pallet 4 is lost, as the cam 1 further turns in a counterclockwise direction in the instant illustration and thereby pushes the follower 12 and consequently guides the pallet fork 2 around its pivot point 30.
  • the regulation wheel 5 is now free and begins movement in the counterclockwise direction in the instant illustration, driven by the secondary gear train 6.
  • Phase 4 ends and phase 1 succeeds this phase while a tooth of the regulation wheel 5 enters into contact with the approaching pallet 3 of the pallet fork 2.
  • the cam 1 may have a circular flank and be mounted eccentrically as shown by the dashed lines
  • FIG. 5 a simplified schematic of the elements of the invention, showing their interconnection, includes the cam 1, the regulation pallet fork 2, the regulation wheel 5, the secondary transmission gear 6, the secondary energy source 7, the main oscillating device mechanism 8, the main transmission gear 9, and the main energy source 10.
  • the oscillating mechanism 8 can optionally be made up of, at least in part, for example, an electric, electromagnetic, or compressed gas or fluid energy source (not shown).
  • the oscillating mechanism may also be of the electronic, quartz type, without departing from the spirit and scope of the invention.
  • the secondary energy source may also be a source other than a purely mechanical source, such as electric, electromagnetic, or compressed gas or fluid energy source.
  • the cam 1 may have sharp corners 1 1 or rounded corners 11 '.
  • the cam 1 is optionally essentially polygonal in form and has concave, straight, convex or curved flanks la, la', la", la' " whose centers are eccentric to the center of rotation of the cam. Note however that a circular cam that is eccentrically mounted could also be used.
  • FIG. 10 an alternate embodiment of the invention, using two cams la and lb and two followers 12 and 13 is shown.
  • the cams lc and Id turn in a synchronized manner, in the same direction and at an identical angular speed.
  • the cam lc turns in a counterclockwise direction in the instant illustration and pushes a follower 13.
  • the cam Id turns in a counterclockwise direction in the instant illustration and pushes a follower 12.
  • the turning of the cams lc and Id allow operation according to the phases 1 to 4 as described in FIGs.l to 4.
  • a second alternate embodiment has one cam 1 and one follower 13', which is held in contact with the cam 1 via an external device such as a spring 14.
  • the cam 1 turns and pushes the follower 13' to a maximum deflection.
  • the cam 1 turns further and the follower 13' is repeled by the device such as a spring 14.
  • the device such as a spring 14.
  • the axis of the cam 1 pallet fork 2 and regulation wheel 5 are not collinear.
  • FIG. 12 a third alternate embodiment is shown in which the main transmission gear or gear train 9 is indirectly connected to the cam 1 through one or more auxiliary gear(s) 17, 17' .
  • the invention solves the particular problem of synchronizing cadence such in a watch movement and ancillary time keeping mechanisms.
  • the invention provides a novel means of connecting the gear train used to drive mechanisms and the gear train used to drive the regulating device, to be able to drive energy demanding mechanisms without significant influence on the regulation of the time piece.
  • the present invention may be embodied as a system, a device, or a method.
  • system contemplates the use, sale and/or distribution of any goods, services or information having similar functionality described herein.
  • the terms "comprises”, “comprising”, or variations thereof, are intended to refer to a non-exclusive listing of elements, such that any apparatus, process, method, article, or composition of the invention that comprises a list of elements, that does not include only those elements recited, but may also include other elements described in the instant specification. Unless otherwise explicitly stated, the use of the term “consisting” or “consisting of or “consisting essentially of is not intended to limit the scope of the invention to the enumerated elements named thereafter, unless otherwise indicated. Other combinations and/or modifications of the above- described elements, materials or structures used in the practice of the present invention may be varied or adapted by the skilled artisan to other designs without departing from the general principles of the invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)

Abstract

La présente invention se rapporte à un dispositif de cadence qui comprend un système doté d'une source d'énergie principale (10), d'un engrenage principal (9), et d'un mécanisme de dispositif de régulation principal (8). Le mécanisme inclut une came (1), qui est fixée directement ou par l'intermédiaire d'un ou plusieurs engrenages auxiliaires (17, 17') à l'engrenage de transmission principal (9), et il travaille avec une ancre de régulation (2) dégageant périodiquement une roue de régulation (5), entraînée par une source d'énergie secondaire (7), par le biais d'un engrenage de transmission secondaire (6).
PCT/IB2017/000115 2016-02-15 2017-02-15 Dispositif de cadence Ceased WO2017141101A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662295216P 2016-02-15 2016-02-15
US62/295,216 2016-02-15

Publications (1)

Publication Number Publication Date
WO2017141101A1 true WO2017141101A1 (fr) 2017-08-24

Family

ID=58358753

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/000115 Ceased WO2017141101A1 (fr) 2016-02-15 2017-02-15 Dispositif de cadence

Country Status (1)

Country Link
WO (1) WO2017141101A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4641975A (en) * 1985-03-11 1987-02-10 Joseph Kieninger Uhrenfabrik Gmbh Clock with mechanical drive
WO2011113757A1 (fr) * 2010-03-17 2011-09-22 Complitime Sa Mouvement pour piece d'horlogerie a remontoir d'egalite
US9152128B2 (en) * 2013-10-16 2015-10-06 Montres Breguet S.A. Escapement mechanism for a watch movement
DE102014117436B3 (de) * 2014-11-27 2015-11-05 Lange Uhren Gmbh Schrittschalteinrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4641975A (en) * 1985-03-11 1987-02-10 Joseph Kieninger Uhrenfabrik Gmbh Clock with mechanical drive
WO2011113757A1 (fr) * 2010-03-17 2011-09-22 Complitime Sa Mouvement pour piece d'horlogerie a remontoir d'egalite
US9152128B2 (en) * 2013-10-16 2015-10-06 Montres Breguet S.A. Escapement mechanism for a watch movement
DE102014117436B3 (de) * 2014-11-27 2015-11-05 Lange Uhren Gmbh Schrittschalteinrichtung

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