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
  • G04B18/00—Mechanisms for setting frequency
  • G04B18/02—Regulator or adjustment devices; Indexing devices, e.g. raquettes
  • G04B18/023—Regulator or adjustment devices; Indexing devices, e.g. raquettes with means for fine adjustment of the indexing device

Definitions

• the present invention relates to a fine adjustment device for a balance-spring consisting of a particular arrangement of the racket to make the adjustment of the isochronism easier and more reliable in the long term.
• the invention also relates to a fine adjustment method, that is to say a succession of manipulations ranging from setting to the benchmark until final adjustment, the initial and final manipulations being carried out by means of a single fine adjustment device thanks to said particular arrangement.
• a racket is composed of a set of parts mounted on the rooster, namely a peg to fix the end of the outer curve of the hairspring, and a snowshoe adjusted with greasy friction on the cockerel having an extension to the beyond the rooster for the pins and / or the racket key and on the opposite side a racket tail on which a screw generally acts, against the return force of a spring, to rotate the racket from small angles and thus modify the active length of the balance spring.
• the construction of the snowshoe has given rise to a certain number of variants and improvements, in particular as regards the means of fixing the external end of the hairspring, and of delimiting the active length of said hairspring.
• the invention therefore aims to overcome the drawbacks of this prior art by providing a device that is much easier to handle thanks to a particular arrangement of clamping / blocking devices making it possible to adjust the positioning and walking by means of a single device. fine adjustment.
• This arrangement also makes it possible to economize on a movable stud holder for adjusting the alignment.
• the invention relates to a fine adjustment device for a balance spring.
• the pendulum which conventionally comprises balancing screws screwed into its arms, has its axis pivoted between a plate and a rooster, the cockerel of which allows the mounting with a fat adjustment of a swivel racket for example for example by means of an adjustment screw pressing the racket tail against the return force of a spring.
• the hairspring a ferrule according to known means on the pendulum axis, can be set to the mark, adjusted with regard to isochronism and have its outside curve fixed by means of the fine adjustment screw and means of specific tightening / blocking at the level of the cock and the racket whose characteristics are explained below.
• the rooster is provided with a first ear extended by a bent stirrup, the feet of which extend up to the external curve of the hairspring and in which is articulated a first clamping device formed of an L-shaped tilting element the small arm is operated by a flange screw screwed into said ear to rotate the large arm and form with the inner surface of the legs of the stirrup a clamp for the end of the hairspring.
• the racket comprises, on an extension opposite to the tail of the racket, a second clamping device having the same design as the first, namely a stirrup in which is articulated an L-shaped tilting element whose flanged screw allows by screwing to form pliers to fix a chosen location on the curve outside the hairspring in order to define the useful length.
• the cock finally has a second ear into which a third screw is screwed through an oblong opening of an annular tongue extending on one side the extension of the racket, said screw making it possible to block the racket in a position determined beforehand by the screwing / unscrewing the fine adjustment screw.
• the three clamping / locking screws all have their axis parallel to the balance axis and are all accessible from the same side of the device, which facilitates adjustment operations.
• This construction also has the advantage of being able to exert on the curve outside the hairspring a defined clamping force, substantially perpendicular to the loop, and not causing its deformation by giving the surfaces facing the clamps formed by a stirrup and a tilting element in L the same curvature as that of the curve outside the hairspring.
• FIG. 1 is a perspective view from above of a balance spring according to a first embodiment of the invention
• FIG. 2 is a bottom perspective view of the balance spring shown in Figure 1;
• - Figure 3 is an enlarged view from below of the clamping device according to arrow III of Figure 2;
• FIGS. 4A and 4B show in section, in the open position and in the closed position, the clamping device at the level of the cock
• FIG. 5 shows in section in the closed position the clamping device at the racket.
• FIG. 6 is a top perspective view of a balance spring according to a second embodiment of the invention
• - Figure 7 is a bottom perspective view of the racket shown in Figure 6;
• Figures 8-9 and 10 are partial sections along lines VIII, IX and X of Figure 6.
• Figures 1 and 2 show in perspective, respectively in top view and in bottom view, a balance spring according a first embodiment of the invention, the assembly having to be fixed on a plate of a mechanical watch movement (not shown).
• the pendulum 1 comprises two arms 1a, 1b into which are balanced screws 2a, 2b, its axis 3 being pivoted between a plate (not shown) and a cock 10.
• the pendulum 1 has a small plate 6a, a large plate 6b with a plate pin 6c, and that a ferrule 5 allows to fix the curve in the center of a hairspring 4 on the axis 3 of the balance 1.
• the cock 10 supports a racket 20, mounted with fatty friction on the cockerel 10a and whose tail 20a makes it possible to modify the orientation thereof by means of a fine adjustment screw 7 pressing said racket tail 20a against the return force of a gooseneck spring 8, one end of which, fixed in the cock 10 by means of two screws 8a, is crossed by said fine adjustment screw 7.
• the cock 10 has a first ear 11 provided with a first clamping device forming a clamp.
• This device consists of a bent stirrup 12 coming integrally with the first ear 11 and whose feet 12a, 12b extend to the hairspring 4, and in which is articulated a tilting element 13 in the form of L maneuverable by a screw clamp 19 with flange to form a clamp used to immobilize the end of the curve outside 4a of the hairspring 4.
• a tilting element 13 in the form of L maneuverable by a screw clamp 19 with flange to form a clamp used to immobilize the end of the curve outside 4a of the hairspring 4.
• the racket 20 comprises a second clamping device forming a clamp constituted, opposite the tail of the racket 20a, by an extension 21 extended by a bent stirrup 22 in which is articulated a tilting element 23 in L making it possible to pinch a portion of the outside curve 4a and thus define the useful length of the hairspring 4 by acting on a second clamping screw 29 with a flange.
• the extension 21 further comprises, on one of its sides, an annular tongue 31 extending above a second ear 30 of the cock 10.
• the tongue 31 has an oblong opening 32 in which a screw is screwed 9 allowing the racket 20 to be locked in a determined position after adjusting its orientation by means of the fine adjustment screw 7.
• the three screws 9, 19 and 29 and the two balancing screws 2a, 2b are all accessible from the same side, in a direction parallel to the axis of the pendulum.
• the tilting element 13 in L comprises a small arm 14, a large arm 15 and an articulation 13a constituted, for example, by two tenons engaged in corresponding openings of the stirrup 12 of the cock 10.
• the small arm 14 has a notch 14a delimited by an upper lip 16 and a lower lip 18.
• the upper lip 16 has an inclined plane 16a directed towards the inside of the notch 14a, said inclined plane 16a coming to cooperate with an inclined plane 16b of the clamping screw 19 for pivoting by unscrewing the tilting element 13 by opening the clamp.
• the lower lip 18 is longer and extends under the flange of the clamping screw 19, so that by screwing the clamp is closed, as shown in Figure 4B.
• the large arm 15 has at its base a shoe 17, the ends of which extend on each side facing the interior surface of the legs 12a, 12b of the stirrup 12.
• the shoe 17 and the feet 12a, 12b have the same curvature that the outside curve 4a of the hairspring 4 so that the tightening of the clamp does not cause any deformation of the strip.
• the clamp formed at the level of the racket 20 by the tilting element 23, shown in section in the closed position in FIG. 5, has exactly the same characteristics as those previously described.
• the tilting element 23 maneuvered by the clamping screw 29 with flange comprises a small arm 24 with ⁇ a notch 24a delimited by an upper lip 26 with inclined plane 26a cooperating with an inclined plane 26b of the flange of the screw 29, a lower lip 28, and a large arm 25 terminated at its base by a shoe 27 opposite the feet 22a, 22b of the stirrup 22.
• the screw 29 is unscrewed to open the clamp secured to the racket 20, then the screw 9 is loosened.
• the attachment angle of the hairspring 4 is then modified by operating the fine adjustment screw 7 to optimize the isochronism, then screw the screw 9 and then the screw 29.
• the gait adjustment is carried out by means of the balancing screws 2a, 2b which make it possible to modify the moment of inertia of the balance wheel. 4. Fine adjustment
• the racket 20 has the simplified form of an open anneaiT no longer comprising a racket tail and therefore not the adjusting device which was constituted by the screw 7 and the swan neck spring 8. It will be observed that such a simplification would be equally applicable to the first embodiment.
• the racket 20 has an annular tongue 31 provided with an oblong opening 32 in which is engaged a screw 9 intended to be screwed into an ear 30 of the cock 10 to immobilize the racket 10 in a given position as can be seen in the figure 9.
• the racket 20 also includes an extension 21 on which is mounted a clamping device no longer comprising a tilting element, but acting in the manner of a vice comprising two jaws 33, 35.
• a fixed jaw 35 in the form of L comprises a small arm 34 fixed to the extension 21 by driving out or riveting two studs 34a, 34b, and a large arm 36 crossed by a conical head screw 39 making it possible to maneuver a movable jaw 33 comprising a guide notch 33a on the small arm 34.
• a second clamping device forming a vice 45 identical to the first, is mounted on a plate 47 fixed to the cock 10 by means of a screw 48a and a tenon 48b.
• a fixed jaw 45, and a movable jaw 43 assembled by a conical head screw 49 to allow easy adjustment of the balance spring.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Pivots And Pivotal Connections (AREA)
• Clamps And Clips (AREA)
• Testing Of Balance (AREA)
• Springs (AREA)
• Closing And Opening Devices For Wings, And Checks For Wings (AREA)
• Motorcycle And Bicycle Frame (AREA)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (2)

Family

ID=32479787

Family Applications (2)

Family Applications Before (1)

Country Status (9)

Families Citing this family (20)

Family Cites Families (9)

• 2002
  • 2002-12-19 EP EP02080621A patent/EP1437634A1/de not_active Withdrawn
• 2003
  • 2003-12-03 JP JP2004561210A patent/JP4409443B2/ja not_active Expired - Fee Related
  • 2003-12-03 US US10/539,007 patent/US7059764B2/en not_active Expired - Lifetime
  • 2003-12-03 DE DE60332870T patent/DE60332870D1/de not_active Expired - Lifetime
  • 2003-12-03 AU AU2003292177A patent/AU2003292177A1/en not_active Abandoned
  • 2003-12-03 AT AT03767732T patent/ATE470177T1/de not_active IP Right Cessation
  • 2003-12-03 EP EP03767732A patent/EP1576426B1/de not_active Expired - Lifetime
  • 2003-12-03 CN CNB2003801065164A patent/CN100462873C/zh not_active Expired - Lifetime
  • 2003-12-03 WO PCT/EP2003/013647 patent/WO2004057427A2/fr active Application Filing
• 2006
  • 2006-03-02 HK HK06102727.0A patent/HK1082971A1/xx not_active IP Right Cessation

Non-Patent Citations (1)

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