US3543506A - Self-winding wristwatch with a chronograph mechanism - Google Patents

Self-winding wristwatch with a chronograph mechanism Download PDF

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Publication number
US3543506A
US3543506A US749478A US3543506DA US3543506A US 3543506 A US3543506 A US 3543506A US 749478 A US749478 A US 749478A US 3543506D A US3543506D A US 3543506DA US 3543506 A US3543506 A US 3543506A
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Prior art keywords
wheel
chronograph
plate
gear
pinion
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US749478A
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English (en)
Inventor
Gerald Dubois
Paul Marmier
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Buren Watch Co SA
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Buren Watch Co SA
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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
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/253—Driving or releasing mechanisms
    • G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
    • G04B19/25353—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/10—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited
    • G04B5/14—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited acting in both directions
    • 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
    • G04F7/0866—Special arrangements
    • G04F7/0885—Modular constructions involving interchangeability with one or more chronograph modules on a single base movement

Definitions

  • the wristwatch movement comprises a spring motor, a gear train and an escapement mechanism mounted between a base-plate and bridges and the chronograph mechanism is mounted above these bridges, but it comprises shafts for the seconds hand of the chronograph'and at least for a minute-register hand, which extend throughout the watch movement.
  • a self-winding mechanism actuated by an oscillatory winding weight is connected to the spring motor of the watch and is wholly mounted under the chronograph mechanism, while avoiding any interference with the chronograph shafts carrying hands.
  • the invention relates to chronographs, more particularly to those for Wristwatches having a conventional mechanical movement with spring motor, gears and an escapement mechanism, all these parts being located between a base-plate and bridges, and the chronograph being arranged over the bridges of the watch movement and comprising at least a minute-register mechanism associated with the gear carrying the seconds hand of the chronograph.
  • the main object of the invention is therefore to create a chronograph with self-winding, especially a true chronograph, ie not a watch merely comprising a seconds hand which can be stopped, returned to zero and started at will, but a watch comprising, in addition thereto, at least a minute-register mechanism.
  • FIG. 1 is a plan view of the watch movement, the chronograph mechanism having been removed;
  • FIG. 2 is a plan view of the same watch movement, but with the chronograph mechanism
  • FIG. 3 is a part sectional view of the watch movement and of the chronograph mechanism along lines III-III of FIGS. 1 and 2;
  • FIG. 4 is a part sectional view of the watch movement and of the chronograph mechanism along lines IV-IV of FIGS. 1, 2 and 8;
  • FIG. 5 is a part sectional view of mechanism along line VV of FIG. 2;
  • FIG. 6 is a part sectional view of the chronograph mechanism along line VI-VI of FIG. 2;
  • FIG. 7 is a plan view of a part of FIG. 2 showing some pieces of the chronograph mechanism in another working position;
  • FIG. 8 is a plan view of the dial side of the watch movement.
  • the watch movement represented in FIG. 1 is a con-- ventional mechanical movement. It comprises a spring third wheel 5, a fourth wheel 6 and an escape wheel 7.
  • the watch movement drives the chronograph mechalower portion of its hub member 12.
  • the portion of hub member 12 projecting beyond the unrecessed upper surface of bridge 8 is provided with a groove 15 which en ables removing wheel 11 from the fourth wheel pivot, for instance by means of cutting pliers or nippers, when the gear train 4 to 7 has to be disassembled for a service, a cleaning or a repair.
  • the running rate of gear train 4 to 7 is controlled by a. usual escapement mechanism which comprises a lever 16 and a balance-wheel 17 (FIG. 3).
  • Lever 16 is journalled “in the base-plate 2 and in a lever bridge 18 fixed to base-plate 2.
  • the balance-wheel 17 is journalled in shock-absorbing bearings carried by the base-plate 2 and a cock 19, respectively, the latter being secured to the baseplate 2 and carrying a movable stud holder 20 and an adjustable regulator 21.
  • the barrel 1, the gear train 4 to 7, the lever 16 and the balance-wheel 17 are located within a sector of baseplate 2, the angle of which does not exceed 180 very much as it appears from FIG. 1.
  • the remaining free space on base-plate 2 is' occupied by a self-winding mechanism which is entirely located within the boundaries of the watch movement described, i.e. which is located in a plan view entirely within the contour of baseplate 2 and in elevation between the lower surface of base-plate 2 and the upper surface of the bridges such as barrel bridge 3 and wheel bridge 8.
  • the self-winding mechanism is controlled by a semicircular substantially plain weight 22 secured to a hollow arbor 23 journalled in two bearings carried by the baseplate 2 and by a cup-shaped member 24, respectively, member 24 being rigidly connected to a plate 25 fixed to baseplate 2 (FIGS. 1 and 4).
  • Arbor 23 carries a disc 26. The latter is set with force fit onto a bearing surface of arbor 23.
  • a toothed ring 27 is fixed to disc 26 coaxially thereto and to arbor 23 for permitting the rotary motions of weight 22 to be transmitted to a ratchetwheel 28 (FIGS. 1 and 3) set in the usual manner on a square portion of the arbor of barrel 1, which protrudes from the upper surface of barrel bridge 3.
  • the rotary motions of weight 22 are transmitted to ratchet-wheel 28 by means of a gear train (FIG. 1), the first gear of which consists of a sliding pinion 29 inserted with a small play between the base-plate 2 and a plate 30 secured thereto. Accordingly, pinion 29 can freely move between base-plate 2 and plate 30 in a plane perpendicular to the watch axis. To facilitate the sliding motions of pinion 29 while keeping its axis substantially parallel to the watch axis, this pinion is provided with two flat end surfaces having a relatively large diameter, said surfaces sliding over the base-plate 2'and the plate 30, respectively.
  • the two wheels 31, 32 always rotate in the same direction corresponding to the winding direction of ratchetwheel 28, whatever may be the wheel with which pinion 29 is meshing.
  • the two wheels 31, 32 and pinion 29 accordingly transform the bidirectional rotary motions of weight 22 in unidirectional rotary motions of the ratchet-wheel 28.
  • Wheel 32 is rigidly connected to a pinion 33 which drives ratchet-wheel 28 by means of two step-down gears 34 and 35.
  • the gears provid d betwe n p nion 29 an ratchet-wheel 28 are journalled in the base-plate 2 and in a bridge 36, respectively, bridge 36 being fixed onto baseplate 2.
  • a retaining pawl 37 cooperates with wheel 31 thus preventing the latter as well as wheel 32 and the two step-down gears 34, 35 from rotating under the action of the spring barrel 1 in the unwinding direction.
  • a further retaining pawl 38 is also associated with ratchet-wheel 28 for preventing a sudden unwinding of the watch spring when the self-winding mechanism is disassembled, for instance for a service or a repair.
  • the watch movement described also comprises a manual winding mechanism which can be actuated in the usual manner by means of a crown 188 (FIG. 9), secured to awinding and hand-setting stem 39 (FIG. 4).
  • Stem 39 which is located opposite the horal division indicating nine oclock (see FIG. 9), is journalled in part in baseplate 2 and in part in bridge 8 (FIG. 4).
  • Gear 45 is mounted on an oval stud so as to be able to move in a transverse direction with respect to its axis of rotation and to allow in that way driving the ratchet-wheel 28 by the self-winding mechanism while leaving the manual winding mechanism at stillstand.
  • gear 45 moves indeed to and fro in a plane perpendicular to the watch axis without rotating and it jumps over the teeth of ratchet-wheel 28.
  • a spring 46 lightly urges gear 45 toward the ratchet-wheel 28.
  • the relative position of gears 44 and 45 with respect to ratchet-wheel 28 is moreover chosen in such manner weight 22 is unclutched from ratchet-wheel 28 in a manner well known to those skilled in the art by means of a free-wheel mechanism (not shown) inserted between the wheel and the pinion of the step-down gear 34.
  • the hands of the Watch are driven by means of the cannon-pinion 10 which is fitted friction-tight onto the arbor of the great wheel 4 (FIG. 4).
  • the'cannon pinio'n' 10 is in meshing relation with a minute wheel 47 which is rigidly connected to a pinion 48 freely rotating around a pin 49 set in base-plate 2.
  • Minute wheel 47 itself meshes with a cannon-pinion 50 located in the center of the movement and carrying the minute hand 51.
  • centrally located cannon-pinion 50 is freely set on a tube 52 secured to base-plate 2 in the center thereof.
  • 1 hour hand 53 is fixed to an hour wheel 54 which is provided with a toothing 55 for driving a calendar mechanism described hereinafter.
  • a toothed ring 56 meshing with the minute wheel pinion 48 is moreover rigidly secured to the hour wheel 54. Ring 56 thus ensures driving hour wheel 54 and, consequently, hour hand 53 at the desired rate.
  • the toothings of cannon-pinion 10, of cannon-pinion 50 and of minute wheel 47 are serrated and have a triangular shape. Moreover, the toothing of minute wheel 47 is provided on a portion of that wheel which is connected by means of a yielding arm to a hub portion secured to pinion 48.
  • the position of stud 49 with respect to the axis of the two cannon-pinions and 50 is chosen in such a manner that the toothing of minute wheel 47 will be pressed as far as possible within the toothings of the two cannon-pinions 10 and 50, thus excluding any free play between the toothings of these members.
  • the chronograph mechanism of the watch described forms a unit carried by a supporting plate 60 (FIGS. 2 to 7). It can thus be mounted as a single piece over the bridges of the watch movement shown in FIG. 1, with the exception of the tilting pinion 61 which connects the watch movement to the chronograph mechanism.
  • Plate 60 is fixed to the Watch movement by means of three pillars 62 (FIG. 1) and of screws 63 (FIG. 2).
  • the tilting pinion 61 connecting the watch movement to the chronograph mechanism is journalled in a fixed lower bearing carried by the wheel bridge 8 (FIGS. 3 and 4) and by an upper bearing which can be shifted in a transverse direction and is carried for that purpose by the upper web 64 of a pivoted carriage 65 (FIGS. 2 and 3).
  • carriage 65 also comprises a lower web 66.
  • the two webs 64 and 66 or carriage 65 are rigidly connected to each other by two pillars 67.
  • Carriage 65 is pivotally mounted on plate 60 by means of a step screw 68 around which said carriage can freely rock.
  • Carriage 65 is, however, set under the action of a spring -69 which urges pinion 61 into meshing relation with a central wheel 70 (see also FIG.
  • Shaft 71 carries the seconds hand 72 of the chronograph.
  • Gear (70, 71) is journalled at its upper end in a bearing carried by a bridge 73 (FIGS. 2 and 4) fixed to plate 60 of the chronograph and, at its lower end, in a bearing formed at the free end of tube 52.
  • Gear (70, 71) is held axially in place by the bearing of bridge 73 and a bearing 98 carried by plate 60.
  • Shaft 71 also carries a heart-shaped cam 74 rigidly secured to wheel 70 by rivetting as shown at 75 (FIG. 4).
  • Shaft 71 finally carries a driving finger 76 by means of which gear (70, 71) drives the minute-register mechanism of the chronograph described hereinafter.
  • tilting pinion 61 can thus alternatively be put in meshing relation with wheel 70 or be set apart, according to the positions of yoke 80 and of carriage 65, the lower portion of this pinion 61 permanently meshes with 'wheel 11 set on the upper pivot of wheel 6.
  • the chronograph mechanism of the watch described furthermore includes a minute-register mechanism which comprises three gears (FIG. 2): a driven gear 82 set 6 under the action of finger 76 carried by shaft 71 of hand 72, a driving gear 83 meshing with the driven gear 82 and driving the hour-register mechanism described hereinafter, and an indicating gear 84 carrying the minute-register hand 85 (FIG. 4).
  • a minute-register mechanism which comprises three gears (FIG. 2): a driven gear 82 set 6 under the action of finger 76 carried by shaft 71 of hand 72, a driving gear 83 meshing with the driven gear 82 and driving the hour-register mechanism described hereinafter, and an indicating gear 84 carrying the minute-register hand 85 (FIG. 4).
  • Gears 82 and 83 of the minute-register mechanism are mounted on a carriage 86 located in a recess 87 of the supporting plate 60 of the chronograph mechanism.
  • gear 83 driving the hour-register mechanism is set in overhanging condition on a stud 88 rivetted to carriage 86. It is axially held in place by a ring 89 set with force fit onto the free end of stud 88.
  • the driven gear 82 of the minute-register mechanism is similarly mounted on carriage 86. The latter rocks around the eccentric head of stud 90 set in the bottom of recess 87 (see also FIG. 3). Stud 90 thus permits the position of the rocking axis of carriage 86 to be adjusted.
  • Carriage 86 is held axially in place on the bottom of recess 87, on the one hand, by means of a step screw 91 extending throughout an opening 92 of carriage 96, the diameter of opening 92 being larger than that of the stepped surface of screw 91 (FIGS. 2 and 3), and, on the other hand, by means of a finger 93 fixed to plate 60 near the edge of recess 87, finger 93 extending over the end of carriage 86 opposed to that caught by screw 91.
  • Carriage 86 is, moreover, set under the action of a return-spring 94. Its stroke under the action of spring 94 can be adjusted by means of the eccentric head of a stud 95 (FIG. 2).
  • Studs 90 and 95 are adjusted in such manner that, in the position represented in FIG. 2, in which carriage 86 bears against stud 95 under the action of spring 94, the driven gear 82 and the driving gear 83 are in such positions with respect to finger 76 and to a gear 96 of the hour-register mechanism, respectively, that gear 82 will be moved one step forward by finger 76 at every revolution of the central wheel 70 and that gear 83 will drive gear 96 one step forward at every revolution by means of a finger 97 which is set with force fit onto a hub member of the driving gear 83 (see also FIG. 6).
  • yoke 80 The rocking motion of carriage 86 against the action of spring 94 is controlled by yoke 80 according to a program disclosed hereinafter.
  • yoke 80 is provided with a camming surface 145 adapted for engaging the eccentric head of a stud 99 carried by carriage 86 (FIGS. 2 and 3).
  • shaft 100 which extends not only throughout the chronograph mechanism, but also throughout the watch movement.
  • shaft 100 extends within the hollow shaft 23 of the winding weight 22, which has an inner diameter larger than shaft 100 so that weight 22 cannot possibly disturb the time records performed by hand 85, for instance by incidentally driving gear 84.
  • shaft 100 At its upper end shaft 100 is journalled in a bearing carried by bridge 73 and its lower end it is journalled in a bearing 101 carried by the cover plate 102 of the calendar mechanism described hereinafter.
  • plate 60 carries a bearing member 103 similar to member 98 provided for shaft 71 of the seconds hand. Member 103 also holds shaft 100 perpendicular to plate 60 when setting the latter onto the framework of the watch movement, thus permitting this shaft 100 to be easily introduced into shaft 23 of weight 22. Member 103 still serves as an axial abutment for gear 84 once the chronograph mechanism has been mounted on the watch movement.
  • gear 84 carries a heart-shaped cam 104 (FIGS. 2 and 4) and it is set under the action of a jumper 105 mounted on plate 60.
  • the three gears 82 to 84 of the minute-register mechanism have the same diameter.
  • Each one is provided with thirty teeth and accordingly makes a complete revolution in thirty steps under the action of finger 76, i.e. within half an hour.
  • the hour-register mechanism comprises two gears: the driven gear 96 already described hereabove, and an indicating gear 106 which carries the hour-register hand 107.
  • FIG. 6 shows that the upper pivots of these two gears 96 and 106 are journalled within bearings carried by a bridge 108. The latter is secured onto plate by means of a pair of pillars 109 (FIGS. 2 and 4). While the lower pivot of the driven gear 96 is journalled in a bearing carried by plate 60 (FIG. 6), shaft 110 of gear 106 extends beyond plate 60 throughout the watch movement (FIG. 4). The portion of shaft 110 extending within the watch movement is surrounded by the great wheel 4, the fourth wheel 6 and the crown wheel 42 (FIG. 1).
  • FIG. 4 also shows that the shaft 110 extends opposite the inner end of the winding and hand-setting stem 39.
  • the lower end of shaft 110 is journalled in a bearing 112 carried by plate 9 which axially holds pinion 57 in place and also carries the lower bearing of the great wheel 4.
  • plate 60- also carries a bearing member 113 which, on the one hand, axially holds in place gear 106 when the chronograph mechanism is removed from the watch movement and, on the other hand, guides shaft 110 when the chronograph mechanism is set in place onto this watch movement.
  • the position of gear 106 is safely ensured at any moment by a jumper 114 mounted on plate 60 and engaging the toothing of gear 106.
  • a heart-shaped cam 115 is rigidly connected to the driven gear 96.
  • the two gears 96 and 106 of the hour-register mechanism have the same diameter and each is provided with twenty-four teeth so that they make one complete revolution in twenty-four steps under the action of finger 97 of the minute-register mechanism, i.e. in twelve hours.
  • the different operations of the chronograph mechanism of the watch described are controlled by means of a usual starting pusher 116 which is mounted at the periphery of the case band 117 of the watchcase approximately opposite the horal division indicating two oclock (FIG. 9) and by means of a usual stopping and returning to zero pusher 118 similar to pusher 116 and mounted in the same manner as the latter approximately opposite four oclock.
  • the inner end of the controlling stem (not shown) of starting pusher 116 is guided by a socket 119 provided in the peripheral side face of base-plate 2 between cock 19 and weight 22 (FIG. 1).
  • the inner end of the controlling stem of the stopping and returning to zero pusher 118 is guided by a similar socket 120 provided in base-plate 2 between weight 22 and bridge 36 of the self-winding mechanism.
  • Lever 121 is pivotally mounted on plate 60 by means of a step screw 123.
  • This lever has a projection with a crank end portion 124 set under the action of the controlling stem of pusher 118. Portion 124 therefore enters socket'120 by passing through a slot 125 (FIG. 1) giving access thereto from the upper face of baseplate 2.
  • Lever 121 actuates yoke 80 in a manner described hereinafter by means of alternativel a projection 126 or a nose 127.
  • This lever is set under the action of a return-spring 128 which urges it against a stop pin 129 set in plate 60.
  • Lever 122 As regards the starting lever 122, it is located on the same level as the stopping and returning lever 121. Like this lever it is pivoted on plate 60 by means of a step screw 130.
  • Lever 122 has an arm with a crank end portion 131 set under the action of the controlling stem of pusher 116 by passing through a slot 132 of base-plate 2, which gives recess to socket 119.
  • the starting lever 122 has a further arm ending in a rounded head portion 133 which enters a notch 134 of yoke 80.
  • Yoke 80 comprises a lower plate 135 provided with a notch 134 enclosing head portion 133 of lever 122.
  • Plate 135 is moreover provided with five camming surfaces, three of which 138, 139 and 140 cooperate with a jumper 141 secured onto plate 60 by means of a screw 142 and a pin 143, and the two remaining ones, 144 and 145, cooperate with the eccentric head of stud '99 carried by the carriage 86 of the minute-register mechanism.
  • Yoke 80 moreover, comprises an intermediate plate 146 and an upper plate 147.
  • the three plates 135, 146 and 147 of yoke 80 are rigidly fixed to each other by two rivets 148.
  • Yoke 80 is pivotally mounted on plate 60 by means of a sleeve 149' which is set with force fit in a bore of plate 60 (FIG. 5).
  • a screw 150 holds yoke 80 axially in place around sleeve 149.
  • the intermediate plate 146 of yoke 80 serves both as a distancepiece for plates 135 and 147 and as a holding member for head 133 of lever 122, plate 146 holding head 133 axially in place in notch 134.
  • the upper plate 147 of yoke 80 it is firstly provided with a tail portion 151 carrying stud 79 and controlling a returning lever described hereinafter. It is, moreover, made in one piece with the two returning levers or hammers 152 and 153 which return to zero the seconds hand 72 and the minuteregister hand 85, respectively.
  • the relative positions of hammers 152, 153 can be adjusted in a manner well known to those skilled in the art by means of a screw 154 having a conical head.
  • the upper plate 147 finally carries a pin 155 which controls a brake lever 156.
  • Lever 156 is pivotally mounted on plate 60 by means of a step screw 157 which is located at one end of lever 156. The free end of this one-armed lever 156 forms a head portion 158 cooperating with pin 155.
  • Brake lever 156 is made in one piece with a return-spring 159 and it is provided with a shoe 160 arranged for engagement with the center. wheel 70 thus preventing any incidental and undesired motion of the seconds hand 72 of the chronograph, when the latter is stopped.
  • the hour-register hand 107 is returned to zero by means of a hammer 161 (FIGS. 2 and 5).
  • Hammer 161 is set with force fit onto a sleeve 162 which also carries a control plate 163 cooperating with the tail portion 151 of the upper plate 147 of yoke 80.
  • the control plate 163 and the hammer 161 are fixed to each other in a predetermined relative orientation by means of a gudgeon 164 which is engaged by a spring 165 urging hammer 161 towards heart 115.
  • lever 121 If pushed 118 is pressed when the chronograph is running, it produces a rocking motion of lever 121 against the action of its return-spring 128. During this rocking motion nose 127 of lever 121 engages lever 122 and causes this lever to rock in the same direction around screw 130. Upon rocking under the action of lever 121, lever 1'22 drives yoke 80 clockwise in FIG. 2 and jumper 141 leaves the camming surface 138.
  • lever 121 and of yoke 80 as well as the positions of their rocking axes are chosen in such manner that during the rocking motions occurring upon pressing pusher 118 projection 126 of lever 121 travels in front of edge 136 of yoke 80 as shown in FIG. 7. Due to the relative positions of projection 126- of lever 121 and of edge 136 of yoke 80 with respect to the rocking axes of the latter and of lever 121, the stroke of lever 121 under the action of pusher 118 is limited by the wedging action occurring between lever 121 and yoke 80, the end face of lever 121 thereby engaging edge 136 of yoke 80 as shown in FIG. 7.
  • lever 121 and of yoke 80 as well as the position of pusher 118 along lever 121 are, of course, chosen in such manner that the pressure which can be exerted by hand on pusher 118' cannot possibly shear either sleeve 149 around which yoke 80 is pivotally mounted or screw 123 around which lever 121 is pivotally mounted.
  • FIG. 7 shows that yoke 80 has rotated through such an angle that its jumper 141 has reached camming surface 139.
  • spring 128 Upon releasing pusher 118, spring 128 rocks lever 121 backwards until it butts again against the pin '129. After lever 121 has left edge 136 of yoke 80, jumper 141 slides along camming surface 139 and rotates yoke 80 into such an angular position that its edges 136 and 137 reach the dot-and-dash line position shown in FIG. 7.
  • yoke 80 lies in a new position in which hammers 152 and 153 do not yet come in contact with the corresponding hearts 74. and 104.
  • Tail portion 151 of yoke 80 similarly holds hammer 161 aside of heart 115.
  • the seconds hand 72, but also the minute-register hand 85 and the hour-register hand 107 consequently remain in the positions they have reached at the moment at which pusher 118 has been actuated.
  • lever 121 no longer actuates yoke '80 by means of its nose 127 and of lever 122, as when stopping the chronograph. It actuates yoke 80 directly and rocks the latter farther clockwise until jumper 141 reaches the camming surface 140.
  • yoke 80 Upon rotating farther under the direct action of lever 121, yoke 80 causes the hammers 152 and 153 to engage the corresponding hearts 74 and 104, thus returning the seconds hand 72 and the minute-register hand 85 to zero. Simultaneously, the tail portion 151 of yoke 80 moves beyond the nose of plate 163, with which it cooperated till now, thus releasing hammer 161. Spring 165, consequently, urges hammer 161 abruptedly toward heart 115, thus returning the hour-register hand 107 to zero. The chronograph is then at rest; ins three hands 72, 85 and 107 are held at zero by the hammers 152, 153 and 161, respectively.
  • pusher 11.8 is pressed once again, when the chronograph is at rest, it moves lever 121 without any action on the remaining members of the chronograph mechanism.
  • a pressure exerted on the contrary on pusher 116 has, as a consequence, that all the members of the chronograph mechanism are moved backwards into the position represented in FIG. 2, thus starting the chronograph. Pressing pusher '116 a second time has not any action on the chronograph members.
  • the watch described still comprises a calendar mechanism which is located on the dial side of baseplate 2 (FIG. 8).
  • This calendar mechanism indicates the date 167 in a window 168 of dial 169, which is located opposite six oclock (FIG. 9).
  • the numbers from 1 to 31 are therefore printed on a date ring 170 carrying an inner toothing 171.
  • This date ring 170 is mounted for free rotary motion coaxially to the watch movement around a cylindrical portion of cover plate 102 which is provided with cut-outs and comprises a peripheral rim 172 (FIG. 4). This rim extends over the teeth 171 thus holding ring 170 axially in place on baseplate 2.
  • plate 102 covers the handsetting mechanism of the watch movement as Well as minute wheel 47.
  • the minute wheel pinion 48, the toothed ring 56 fixed to the hour wheel 54, as well as a driving gear 173 extend, on the contrary, on the same level as plate 102 within corresponding cut-outs thereof.
  • a jumper 174 engages toothing 171 under the action of a spring 175 and normally holds ring 170 in such angular positions 11 that the date indication 167 always appears in the center of window 168.
  • the date ring 170 is automatically driven by toothing 55 of hour wheel 54.
  • gear 173- it is of the type described in U.S. Pat. No. 2,948,107 of the same assignee.
  • the first one of these units comprises a hub 177 pivoted on stud 176 and made in one piece with a pinion 178 bearing on the base-plate 2.
  • a disc 179 provided with a slot 180 is rigidly secured to hub 177 at the upper end thereof as viewed in FIG. 8.
  • Pinion 178 is driven by toothing 55 of the hour wheel 54 by the intermediate of two gears 181 and 182.
  • the diameter of pinion 178 is chosen in such manner with respect to that of toothing 55 that pinion 178 makes three revolutions during the time the hour wheel 54 makes one, i.e. in such manner that pinion 178 makes six revolutions in twenty-four hours.
  • the second unit of the driving gear 173 comprises a toothed wheel 183 which is idly mounted on hub 177 between pinion 178 and disc 179.
  • a circular plate 184 is eccentrically fixed to wheel 183.
  • a split ring 185 is freely set around plate 184 and a pawl 186 is inserted for free rocking motion in the opening of ring 185.
  • Pawl 186 carries a stud 187 entering slot 180 of disc 179.
  • Wheel 183 directly meshes with toothing 55 of hour wheel 54.
  • the diameter of wheel 183 is chosen with respect to that of toothing 55 in such manner that wheel 183 makes one complete revolution when the hour wheel makes two. In other words, wheel 183 makes one revolution in twenty-four hours.
  • the first unit thereof drives pawl 186 as well as ring 185 by the intermediate of disc 179, slot 180 and stud 187 six times around stud 176, while the second unit comprising wheel 183 and plate 184 makes only one revolution.
  • pawl 186 travels five times over the apex of eccentric plate 184.
  • pawl 186 does not lie on the apex of plate 185 so that it is farther away fromtoothing 171 than on the occasion of the sixth pas sage opposite thereto.
  • the eccentricity of plate 184 accordingly need only be chosen great enough in order that pawl 186 does not reach toothing 171 on the occasion of said five passages.
  • pawl 186 has such a form that it rocks out of the path of teeth 171 without driving ring 170, when the watch hands are moved counterclockwise.
  • that particular permits the position of the date ring 170 to be reset very quickly.
  • the watch hands 51 and 53 need only be set at midnight and the crown 188 be rotated alternatively in either direction.
  • the dial 169 is provided opposite three oclock with a small dial 189 carrying a scale comprising thirty divisions 190 and, opposite nine oclock,
  • the minute-register hand 85 is driven one step forwards and jumps from one of the divisions 190 to the next one.
  • the hour-register hand 107 jumps one step forwards while moving through half the way comprised between two consecutive divisions 192.
  • these small dials could be provided for instance on the axis twelve-six oclock of dial 169. While keeping a calendar window opposite six oclock, the dials 189 and 191 could also be located opposite ten and two oclock, or between ten and eleven and between one and two oclock. If the calendar window were located opposite three oclock, the small dials of the register mechanism-s could also be provided either between seven and eight and between ten and eleven oclock or opposite seven and eleven oclock. Moreover, the dials of the register mechanism are advantageously located at some distance of the periphery of dial 169 in order to avoid interferences with the scales which are usually provided at the periphery of the dial. With chronographs there are often as many as tree of four scales provided according to the nature of the measures which the chronograph seconds hand should enable.
  • the self-winding watch movement need only be provided with a passage in the center for the shaft of the seconds hand and with a single further eccentric passage for the shaft of the minute-register hand.
  • the watch movement could be set in such an angular position within the watchcase that the single eccentric passage could be provided no longer through the shaft of a gear of the watch movement, like in the embodiment described with reference to the drawing, but between two gears, for instance between the self-winding weight and the balance-wheel.
  • the selfwinding weight and the hand-setting pinion are not the sale gears of the watch movement radial plane of the watch movement with respect to the radial plane passing through the winding and hand-setting stem and provided that the barrel arbor be located at an appropriate distance of the Watch movement axis.
  • the location of that stem represented in the drawing has the advantage that the chronograph may comprise a gear for driving the seconds hand wheel, which is located in the movement half opposed to that occupied by the control pushers of the chronograph.
  • the location chosen for the stem 39 in the watch described does not constitute a handicap. Since that watch is provided with a self-winding mechanism, the crown 188 will only be actuated incidentally. Its location opposite nine oclock has rather the advantage that the pushers 116 and 118 are more readily accessible. Finally, opposite nine oclock, the
  • crown 188 is substantially lessexposed than opposite three oclock.
  • the watch described has also the advantage that its tilting pinion is easier to set in place.
  • the bearing of the lower pivot of this pinion is indeed carried by the base-plate of the watch movement.
  • the tilting pinion truly has to be made shorter in the watch described than in the known watches, but not very much, because of the recesses 13 and 14 provided in the wheel bridge of the watch movement.
  • the watch described has the advantage that all the members of the chronograph are mounted on one and the same supporting plate which can itself be mounted as a single unit onto the watch movement. Due to that arrangement, it has not only been possible to rationalize the mounting operations of the watch when manufacturing the same in series, but also to simplify the task of the repairers.
  • the watch movement is, indeed, accessible as soon as plate 60 has been removed.
  • the chronograph mechanism itself need not be disassembled for the purpose, Moreover, if this mechanism happens to be defective, it can be removed as a whole very quickly, returned to the manufacturer and immediately replaced by a new mechanism.
  • a mechanism indicating for instance the moon phases could also be mounted between the base-plate 2 and the dial 169 of the watch described.
  • the latter could nevertheless be provided with a balance-wheel having a moment of inertia compatible with the chronograph mechanism. It could also be provided with a barrel having an amply suflicient torque for properly driving all the mechanisms disclosed without jeopardizing the precision of the running rate of the watch.
  • a circular caliber of 13% Le. with a movement having a diameter approximately equal to 31 mm., it has been possible to use a barrel, the spring of which exerted a torque stronger than 800 g.mm. when it was completely wound up, and a balance-wheel having a moment of inertia greater than 16 mg.cm. all the members of the movement as well as those of the chronograph and of the calendar mechanisms being located within a total height of 7.50 mm.
  • a wristwatch movement including a spring motor, a gear train driven by said spring motor, an escapement mechanism controlling the running rate of said gear train and a motion work connected to said gear train, the combination of a chronograph mechanism and of a self-winding mechanism comprising a winding weight mounted for free rotary motion around an axis and transmitting means connecting said winding weight to said spring motor.
  • a wristwatch comprising the movement of claim 1 and a casing enclosing said movement, the combination of a first control button of the chronograph mechanism carried by said casing and being located at the periphery thereof approximately opposite the horal division indicating two oclock, a second control button of the chronograph mechanism being also carried by said casing and located at the periphery thereof approximately opposite the horal division indicating four oclock, a setting stem for actuating the motion work manually and an opening for said stem provided at the periphery of said casing approximately opposite the horal division indicating nine oclock.
  • said chronograph mechanism comprising a seconds gear having a shaft carrying a seconds hand and a register gear having a shaft carrying a register hand, and said movement comprising a central opening extending axially throughout the movement for the passage of the shaft of said seconds gear and an eccentric opening extending axially throughout the movement for the passage of the shaft of said register gear.
  • said winding weight being mounted for free rotation around a hollow shaft partly providing said eccentric opening for the shaft of said register gear.
  • the wristwatch movement of claim 4 further com prising a base-plate having a cylindrical projection on its dial side, a setting stem for actuating the motion work manually and a setting pinion inserted between said setting stem and said motion work and mounted for rotary motion around said cylindrical projection of the base-plate, an opening being provided in said cylindrical projection and extending axially throughout the movement thus constituting a second eccentric passage therethrough, said chronograph mechanism comprising a second register gear having a shaft carrying a second register hand, the shaft of said second register gear extending within said second eccentric passage through the watch movement.
  • the chron0- graph mechanism comprising a Supporting plate carrying all the members thereof and being secured to said framework above said bridges.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
US749478A 1967-08-08 1968-08-01 Self-winding wristwatch with a chronograph mechanism Expired - Lifetime US3543506A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1113467A CH515535A (fr) 1967-08-08 1967-08-08 Montre-bracelet à ressort moteur

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US3543506A true US3543506A (en) 1970-12-01

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CH (2) CH1113467A4 (enrdf_load_stackoverflow)
DE (1) DE1773990C3 (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653201A (en) * 1970-04-06 1972-04-04 Seiko Instr & Electronics Self-winding chronograph
US3688491A (en) * 1968-10-28 1972-09-05 Gerald Dubois Timer
US4213293A (en) * 1977-10-15 1980-07-22 Citizen Watch Co., Ltd. Receiving unit for timepieces
US5151886A (en) * 1986-10-28 1992-09-29 Seiko Epson Corporation Analog electric timepiece using an intermittent driving signal
US5220541A (en) * 1991-10-14 1993-06-15 Eta Sa Fabriques D'ebauches Watch movement having a chronograph module adapted on a motor module
US20040090872A1 (en) * 2001-03-21 2004-05-13 Christian Schmiedchen Timepiece component comprising a mechanism for interlocking a time indicating function and simultaneous winding of a barrel spring
US20040208085A1 (en) * 2003-03-27 2004-10-21 Mamoru Watanabe Chronograph timepiece having calendar mechanism
US20050083789A1 (en) * 2003-10-16 2005-04-21 Avi Matatov Watch with independent modules
US20130148481A1 (en) * 2011-12-13 2013-06-13 Eta Sa Manufacture Horlogere Suisse Modular mechanical timepiece unit with functional modules

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH579794B5 (enrdf_load_stackoverflow) * 1973-04-06 1976-09-15 Valjoux Sa
CH647125GA3 (en) * 1982-03-02 1985-01-15 Dubois & Depraz Sa Chronograph
EP1372117B1 (fr) * 2002-06-13 2008-04-16 Vaucher Manufacture Fleurier SA Mécanisme de chronographe
EP4280002A1 (fr) * 2022-05-17 2023-11-22 Montres Breguet S.A. Module chronographe muni d'une roue amovible

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909029A (en) * 1957-05-17 1959-10-20 Gen Time Corp D.-c. timing device
US3045418A (en) * 1960-06-07 1962-07-24 Ed Heuer & Co Sa Time meter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909029A (en) * 1957-05-17 1959-10-20 Gen Time Corp D.-c. timing device
US3045418A (en) * 1960-06-07 1962-07-24 Ed Heuer & Co Sa Time meter

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688491A (en) * 1968-10-28 1972-09-05 Gerald Dubois Timer
US3653201A (en) * 1970-04-06 1972-04-04 Seiko Instr & Electronics Self-winding chronograph
US4213293A (en) * 1977-10-15 1980-07-22 Citizen Watch Co., Ltd. Receiving unit for timepieces
US5151886A (en) * 1986-10-28 1992-09-29 Seiko Epson Corporation Analog electric timepiece using an intermittent driving signal
US5220541A (en) * 1991-10-14 1993-06-15 Eta Sa Fabriques D'ebauches Watch movement having a chronograph module adapted on a motor module
US20040090872A1 (en) * 2001-03-21 2004-05-13 Christian Schmiedchen Timepiece component comprising a mechanism for interlocking a time indicating function and simultaneous winding of a barrel spring
US7192181B2 (en) * 2001-03-21 2007-03-20 Glashütter Uhrenbetrieb GmbH Timepiece including a mechanism for triggering a time-related function and simultaneous winding of a barrel spring
US20040208085A1 (en) * 2003-03-27 2004-10-21 Mamoru Watanabe Chronograph timepiece having calendar mechanism
US20050083789A1 (en) * 2003-10-16 2005-04-21 Avi Matatov Watch with independent modules
US20130148481A1 (en) * 2011-12-13 2013-06-13 Eta Sa Manufacture Horlogere Suisse Modular mechanical timepiece unit with functional modules
US9274504B2 (en) * 2011-12-13 2016-03-01 Eta Sa Manufacture Horlogère Suisse Modular mechanical timepiece unit with functional modules

Also Published As

Publication number Publication date
DE1773990C3 (de) 1974-06-20
CH515535A (fr) 1971-04-15
CH1113467A4 (enrdf_load_stackoverflow) 1971-04-15
DE1773990A1 (de) 1971-10-21
DE1773990B2 (de) 1973-11-22

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