Classifications

• • G—PHYSICS
  • G04—HOROLOGY
  • G04F—TIME-INTERVAL MEASURING
  • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
  • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
  • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
• • G—PHYSICS
  • G04—HOROLOGY
  • G04F—TIME-INTERVAL MEASURING
  • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
  • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
  • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
  • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
  • G04F7/0814—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with double hammer, i.e. one hammer acts on two counters
• • G—PHYSICS
  • G04—HOROLOGY
  • G04F—TIME-INTERVAL MEASURING
  • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
  • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
  • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
  • G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
  • G04F7/0828—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement acting in the plane of the movement
• • G—PHYSICS
  • G04—HOROLOGY
  • G04F—TIME-INTERVAL MEASURING
  • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
  • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
  • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
  • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
  • G04F7/0847—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with column wheel

Definitions

• the present invention relates to a timepiece mechanically driven associated with a chronograph mechanism, comprising a column wheel for controlling the rockers, in particular a clutch rocker carrying a clutch mobile between the gear train of finishing the timepiece and the chronograph train, the pivot axis of this clutch lever being substantially coaxial with that of a drive wheel secured to the axis of a wheel of said finishing train.
• the present invention relates to a timepiece mechanically driven associated with a chronograph mechanism, as defined by claim 1.
• This solution has many advantages, in particular that of having two separate mechanisms, that of watchmaking and chronographs, while allowing integration of the latter mechanism into the clockwork mechanism, leading to a particularly judicious use of the space available both on the surface and at height.
• FIG. 1 is a plan view on the bridge side of the movement of this timepiece;
• Figure 2 is a view similar to Figure 1 partially broken away to show the train of the watch movement;
• Figure 3 is a view of the only chronograph mechanism in the rest position;
• Figure 4 is a view similar to Figure 3 showing the mechanism during start-up;
• FIG. 5 is a view similar to FIG.
• Figures 13 and 14 are diagrams of the gear train indicator power reserve during winding, respectively during the disarming of the mainspring.
• FIG. 1 shows in particular a chronograph mechanism, a control lever 1 pivotally mounted around a screw carried by the screwed into the barrel bridge B and one end lb of which is intended to be connected to a single pusher (not shown) coaxial with the winding stem T.
• the end lb of the lever 1 could also be located opposite “2 hours ".
• the other end of this control lever 1 ends with a pawl 2 engaged with a ratchet toothing 4a (FIG. 3) of a column wheel 4.
• a return spring ri tends to bring the control lever 1 back into a rest position illustrated in FIG. 1, against a stopper ld working with the edge of an oval opening le, thus delimiting two limit positions.
• Another return spring r 2 tends to keep the pawl 2 constantly engaged with the ratchet teeth 4a.
• This column wheel 4 is selectively in direct contact with all the rockers of the chronograph mechanism.
• One of these rockers is the rocker 5 of the reset hammers carrying two hammers 5a, 5b and pivoted around an axis 5c secured to the barrel bridge B.
• This rocker 5 is engaged with a return spring r 5 which presses it constantly towards the column wheel 4.
• Another lever constitutes a brake 6 constantly pushed against the column wheel 4 by an elastic arm 6a stamped with the brake 6 and bearing against a stop 6c.
• This brake 6 is pivotally mounted around a bearing screw 6b screwed into the barrel bridge B.
• a third lever is the clutch lever 10 which has a semi-circular mobile pivoting opening 10a pivotally mounted around a circular surface 14a a pivoting plate 14, itself pivotally mounted around a screw 14b screwed into a bridge S of the seconds wheel 15a ( Figure 11).
• the angular position of this pivoting plate 14 is adjustable around the axis of this screw 14b using an eccentric 13.
• the semi-circular mobile pivoting opening 10a has a range which opens onto the upper face of the scale 10. This range serves to retain the scale 10 between the seconds bridge S and a bearing surface surrounding the circular surface 14b of the pivoting plate 14, opening onto the underside of this pivoting plate 14 and adjusting to the complementary surface of the semi-circular mobile pivoting opening 10a of the rocker 10 .
• the clutch lever 10 has two upper parts 10s and lower lOi assembled by a screw lOv ( Figure 11) between which a clutch wheel 16 is pivotally mounted. This clutch wheel 16 is constantly engaged with a driving wheel 15 secured to the axis of the seconds wheel 15a.
• the seconds bridge S is higher than the bridge of the gear train R.
• the difference in height is chosen so as to allow the driving wheel 15 and the clutch lever 10 to pass over the bridge of the gear train R. Thanks to this arrangement and to the pivoting system of the clutch lever 10 along an axis coaxial with that of the seconds wheel 15a and the driving wheel 15, the extra thickness due the chronograph mechanism is reduced to a minimum. Only the axis of the seconds wheel 15a carrying the driving wheel requires a modification of the clockwork movement, all the rest of the chronograph mechanism being located outside the watch movement does not generate any modification of this movement.
• a return spring rio pushes the clutch lever 10 clockwise around the circular pivoting surface 14, so that the end of this clutch lever 10 is constantly in contact with the column wheel 4.
• a last lever, called inter-meter lever 21 is pivotally mounted around a bearing screw 21a.
• a return spring r 2 ⁇ pushes this lever 21 clockwise and presses one of its ends against the column wheel 4 (FIG. 3).
• the other end of this lever 21 carries an intermediate wheel 18 of the minute counter which is constantly engaged with a wheel 8 of the minute counter whose pivot axis 8a (FIG. 10) crosses the entire movement to exit from the dial side movement to carry a minute counter hand (not shown).
• This wheel 8 of the minute counter still carries a heart-shaped cam 9 (FIG. 3) intended to cooperate with the arm 5a of the hammer 5 for resetting to zero during the resetting of the minute counter.
• a chronograph wheel 19 is still pivoted in the center of the movement and its axis crosses the entire movement to exit the dial side of the movement to carry a hand (not shown) of the seconds counter.
• This chronograph wheel 19 carries a drive finger 17 of the intermediate wheel 18 of the minute counter (FIGS. 5 and 9) driving the wheel 8 of this counter at each rotation, that is to say once per minute.
• This chronograph wheel also carries a heart-shaped reset cam 20 (FIG. 3) intended to cooperate with the arm 5b of the reset hammer 5.
• a jumper spring 3 is engaged with the ratchet teeth 4a of the column wheel and a jumper spring 7 is engaged with the wheel 8 of the minute counter.
• the penetration of the clutch wheel 16 carried by the clutch lever 10 is adjustable by means of a stop 11 constituted by an eccentric, serving to limit the pivoting of the clutch lever 10 in the clockwise direction. a watch, thus making it possible to adjust the penetration of the teeth of the clutch wheel into that of the chronograph wheel 19.
• Another eccentric stop 12 serves to limit the pivoting of the intermediate lever 21 in a clockwise direction and consequently the penetration of the drive finger 17 into the teeth of the intermediate wheel 18.
• FIG. 2 shows the cog of the watch movement.
• this movement includes an additional mobile 24 between the teeth of the barrel 22 enclosing the mainspring (not shown) and the pinion 23a of the center wheel 23.
• This additional mobile 24 increases the reduction ratio between the barrel 22 and the center wheel 23, so that the barrel 22 rotates more slowly than in a classic movement, which makes it possible to increase the power reserve of the watch from around two days for a classic watch to around ten days in this case, ie 8 useful days.
• the cog of the power reserve indicator is essentially on the dial side of the movement ( Figures 13 and 14).
• this train comprises a gear 37 engaged on the one hand with the ratchet 36 of the barrel 22 and on the other hand with a differential wheel 38, the shaft 38a of which crosses the movement and includes a square 38b engaged with a reference 31 meshing with a satellite 32 pivotally mounted on a rod 30a of a crown 30 carrying the differential.
• This crown 30 is engaged with a reference 29 which meshes with a pinion 28a of a wheel 28 coaxial with the barrel 22 and which is in kinematic connection with the barrel 22 by means of a double pinion 39 meshing simultaneously with the teeth of the barrel 22 and that of the wheel 28.
• the pinion 32a of the satellite 32 meshes with an intermediate wheel 33 which meshes with a drive wheel 34 whose pinion 34a meshes with a toothed sector 35 carrying the power reserve indicator (not shown) which moves over an angle of 90 ° for example, between the winding and winding up of the mainspring contained in the barrel 22.
• FIG. 13 indicates by arrows the respective directions of rotation of the various moving parts of the gear train indicating the power reserve during the winding phase of the barrel spring.
• the mobiles without arrows correspond to those which are fixed, that is to say the barrel 22, the double pinion 39, the wheel 28 coaxial with the barrel 22, the reference 29 and the differential crown 30.
• FIG. 14 indicates by of arrows the respective directions of rotation of the moving gears of the power reserve indicator during the disarming phase of the barrel spring.
• the mobiles which remain stationary during this phase have no arrows, these are the ratchet 36, the reference 37, the differential wheel 38 and the satellite drive return 31 secured to the differential wheel 38.
• Figures 3 to 8 show the only chronograph mechanism during the different phases of a complete cycle of operation.
• Figure 3 shows this mechanism reset.
• the arrows indicate which are the moving parts and the respective directions of movement. All the organs of the mechanism are at rest except for the drive wheel 15 and the clutch wheel 16 which are in kinematic connection with the gear train 22-27 of the watch movement.
• FIG 4 illustrates the start-up phase of the chronograph mechanism.
• the arrows show which are the moving parts and their respective directions of movement.
• This start-up is controlled by the lever 1 following a pressure exerted on its end adjacent to the winding stem T ( Figure 1).
• This pressure turns the column wheel 4 by 20 ° clockwise and this rotation causes the rocker 5 to move in the direction of the arrows and release the hammers 5a, 5b, as well as the movement of the clutch shoes 10 and inter counter 21 in the respective directions of the arrows.
• Figure 5 shows the chronograph running.
• the levers engaged with the columns of the column wheel 4 are in the same positions as above, and all the wheels of the chronograph mechanism are in movement in the respective directions indicated by the arrows.
• the control lever 1 is returned to the rest position.
• the intermediate wheel 18 and the minute counter wheel 8 are driven step by step by the finger 17 of the chronograph wheel 19, once per revolution of this wheel 19, that is to say a times per minute.
• the transition from the phase of FIG. 5 to that of FIG. 6 corresponds to the passage of the stopping of the chronograph train following a new actuation of the control lever 1.
• the brake 6 moves in the direction of the arrow and bears against the chronograph wheel 19 which it immobilizes.
• the clutch lever 10 moves in the direction of the arrow separating the clutch wheel 16 from the counter wheel 19.
• FIG. 7 shows the chronograph stopped, that is to say that with respect to FIG. 6, pressure on the control lever 1 has ceased to be applied, so that it has returned to the rest position under the pressure of the return spring laughed, thus putting the pawl 2 in the ready position for actuating the column wheel in a new step of 20 °.
• the brake 6 retains the chronograph wheel 19 in the position in which the chronograph mechanism has been stopped, allowing the time measured by this mechanism to be read between its start and stop.
• the last function is to reset the hands of the second and minute counter. It is illustrated by FIG. 8 in which it can be seen that the hammer 5 is pushed against the cams with cores 9 and 20. Simultaneously, the brake 6 releases the chronograph wheel 19, the rocker 21 releases the finger 17, thus allowing delivery at zero of the minutes and seconds counters.
• FIG. 3 shows the respective positions of the components of the chronograph mechanism after resetting to zero, once the control lever 1 has been returned to the rest position by the return spring ri.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Measurement Of Unknown Time Intervals (AREA)
• Electromechanical Clocks (AREA)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (2)

Family

ID=8184230

Family Applications (2)

Family Applications Before (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (1)

• 2001
  • 2001-11-09 EP EP01811078A patent/EP1310840A1/de not_active Withdrawn
• 2002
  • 2002-11-06 AU AU2002336025A patent/AU2002336025A1/en not_active Abandoned
  • 2002-11-06 AT AT02769838T patent/ATE454653T1/de not_active IP Right Cessation
  • 2002-11-06 DE DE60235042T patent/DE60235042D1/de not_active Expired - Lifetime
  • 2002-11-06 WO PCT/CH2002/000597 patent/WO2003040834A2/fr not_active Application Discontinuation
  • 2002-11-06 EP EP02769838A patent/EP1461667B1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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