US3927519A - Timepiece movement with a timer mechanism - Google Patents

Timepiece movement with a timer mechanism Download PDF

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Publication number
US3927519A
US3927519A US531074A US53107474A US3927519A US 3927519 A US3927519 A US 3927519A US 531074 A US531074 A US 531074A US 53107474 A US53107474 A US 53107474A US 3927519 A US3927519 A US 3927519A
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Prior art keywords
spring
hammer
control
piece
movement
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Expired - Lifetime
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US531074A
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English (en)
Inventor
Francois Berthoud
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Nouvelle Lemania SA
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SSIH Management Services SA
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Assigned to NOUVELLE LEMANIA S.A. reassignment NOUVELLE LEMANIA S.A. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SOCIETE SUISSE POUR L'INDUSTRIE HORLOGERE MANAGEMENT SERVICES S.A.
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    • 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
    • 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
    • G04F7/06—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stop-watch
    • G04F7/065—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stop-watch with start-stop control arrangements

Definitions

  • the movement comprises a frame, a time recording member, a timing element with a balance and a balance spring, and mechanisms for starting, stopping and retuming the time recording member to zero, which comprise a push-piece, a control part connected to the frame by a sliding link and having a control finger, two control parts consisting of a balanceflirt and a navette for actuating the return to zero of the time recording member and a resilient return device acting upon the control part.
  • FIG. 1 A first figure.
  • a timepiece movement comprising a frame, a timerecording member, a timing element with a balance and a balance-spring, and a mechanism for starting, stopping, and returning the time-recording member to zero, the latter mechanism in turn comprising a pushpiece, control part connected to the frame by a sliding link and having a control finger, two controlled parts consisting of a balance-flirt and a navette for actuating the return-to-zero of the time-recording member, and a resilient retum-device acting upon the control part.
  • timers are known, each having its specific uses. Some of them comprise a single pushpiece which is, moreover, generally combined with the winding stem; this control member performs all the desired functions, viz., starting, stopping, and returning the seconds-hand to zero.
  • the control mechanisms of these timers are called upon to perfonn three flsnctions by means of the crown.
  • auxiliary push-piece which controls the hammer.
  • the winding crown is movable along its axis and serves to control the flirt which alternately blocks and releases the balance. The first time the crown is pressed, the seconds-hand is set in motion, and the second time, it is stopped. By pressing on the crown once more, it is possible to start the seconds-hand up again without having returned it to zero.
  • the retum-tozero control is independent of the flirt control and is actuated by means of the auxiliary push-piece. in certain cases, a bolt is held in blocking position by a spring and in unbolted position by the flirt when the latter is in blocking position. in this case, the return to zero is possible only it the seconds-hand is stopped.
  • the mechanism performs one function by means of the crown and comprises a double-action auxiliary push-piece or a bolt.
  • This auxiliary bolt controls the flirt and, consequently, the starting and stopping of the seconds-hand. in such mechanisms, the crown serves to control the return-to-aero hammer.
  • timers supplies a particular need, so that all of them must be manufactured at the same time.
  • Movements of the kind to which this invention particularly relates are already known, but solely in timers ot the type where two functions are performed by means of the crown.
  • the control part acts upon the flirt, and in response to pressure exerted on the starting and stopping pushpiece. it causes the flirt to pivot from one of its end positions to the other.
  • a return-spring which exerts equal amounts of force on two pins disposed on each side of the link between the push-piece and the control part.
  • the retum-device in resting position exerts upon the control part a resultant force, the line of action of which passes alongside the mentioned link, the control part being subjected by the returndevice and by the push-piece to a torque which presses the control finger against one of the controlled parts.
  • FIGS. 1, 2, and 3 are plan views of the first embodiment in the return-to-zero position, the position where the seconds-hand is in motion, and the position where the seconds-hand is stopped, respectively,
  • FIGS. 4 and 5 are plan views of the second embodiment in the starting and stopping positions of the seconds-hand, respectively, with the positions of certain parts at the time of the retum-to-zero operation being shown in dot-dash lines, and
  • FIGS. 6 and 7 are plan views of the third embodiment in the starting and stopping positions of the secondshand, respectively, the hammer being in retum-to-zero position in FIG. '7.
  • the timer partially illustrated in FIG. I is of the type in which three functions are performed by pressing on the crown.
  • the drawing shows a generally circular base plate 1 which bears the parts of the mechanism.
  • a plate cover (not shown) will be secured above the plate 1 to hold the various parts axially in place.
  • These parts consist essentially of a control part 2, a flirt 3 provided with a flirt-brace 4, a navette 5, a hammer 6, a reverser 7, a navette jumper 8, and a control spring 9.
  • the flirt 3 and the navette 5 are flat, rigid parts formed by blanking and mounted so as to pivot about fixed arbors l0 and 11, respectively.
  • the brace 4 of the flirts 3 extends perpendicular to the plane of the plate 1 into a notch made in the periphery of the plate 1 so as to cooperate with the periphery of the rim of a balance (not shown). in the position shown in FIG. 1, the brace 4 presses against the rim of the balance, whereas in the position shown in FIG. 2, it is moved away from the rim and consequently frees the balance, thus allowing it to oscillate about its axis.
  • the navette 5, which pivots about the arbor 11, is provided with a pin 12 which passes through a round opening 13 in the plate 1.
  • the pin 12 cooperates with a notch in the edge of a rigid sliding part (not shown), called a brake-lever, which is mounted under the plate 1 so as to cooperate with a fourth wheel.
  • the function of the brake-lever is to prevent jumping or jerking when the seconds-hand is set in motion. lt presses against the fourth wheel when the hammer 6 is in return-to-zero position.
  • the hammer 6 cooperates with two heart-pieces l4 and 15. it is connected to the plate 1 by a sliding link composed of an elongated straight slot 16 and a cylindrical stud 17 secured to the plate .I by a screw 18.
  • the stud 17 is engaged in the slot 16 so as to guide the hammer 6 without play.
  • the axis of the slot 16 passes between two flat edge portions 19 and 20 of the hammer 6 which are so oriented as to be substantially symmetrical with respect to that axis.
  • the heart-piece 14 is housed in the center of the plate 1 and mounted on the fourth wheeland-pinion. It thus controls the return of the secondshand to zero, while the heart-piece 15 is mounted on the minute-recording gears, which are otf-center.
  • the hammer 6 is also connected to the navette by a sort of swivel-joint consisting of a heel 21 blanked at the end of the navette 5 and engaged in a suitablyshaped notch 22 in the hammer 6.
  • a tip 23 which presses against a deeply concave portion of the notch 22 Ste that the joint between the navette 5 and the hammer 6 is actually efl'ected by means of the tip 23.
  • the rear portion of the heel 21, on the other hand, is arcuately curved and engaged in a matching concave portion 24 of the notch 22, thus preventing any accidental disengagement of the navette 5 from the hammer 6.
  • FIG. 2 shows the position of the hammer 6 when disengaged from the heart-pieces l4 and and the corresponding position of the navette 5. It will be realized that through the rotation of the navette 5 from the position shown in FIG. 2 to that of FIG. I, the two flat edge portions 19 and follow paths which bring them up against the heart-pieces l4 and 15, thus causing these heart-pieces to pivot until they assume the positions shown in FIG. I.
  • the mechanism comprises, first, two notches 25 and 26 in one of the arms of the navette jumper 8, and second, an incline 27 and a hollow 28 in the other arm of the jumper 8.
  • the jumper 8 is a V-shaped resilient part secured by an eyelet 29 engaged on a stud 48 which is integral with the plate 1.
  • the flirt 3 bears a cylindrical stud 30 provided with a groove which engages in one or the other of the notches 25 or 26 according to the position of the flirt 3, and the navette 5 has a similar stud 31 whim cooperates with the incline 27 or with the hollow 28 (FIGS. 1 and 2) according to the position of the navette 5.
  • the flirt 3 and the navette 5 are alternately controlled by the sarne control part 2, which likewise consists of a flat blanked plate.
  • One of its ends is provided with a profile-tumed cylindrical post 32 having a round stud driven into an opening in and projecting out from the other side of the part 2.
  • the post 32 is engaged in the inner portion of a radial slot 33 in the plate 1.
  • the slot 33 extends from the periphery of the plate 1 towards the center; just after its entry portion, it has a widened portion 34, then an inner portion of the same width as the entry portion.
  • the inner portion of the slot 33 serves to guide the post 32, so that the slot 33 and the post 32 together constitute a sliding link which is, in fact, the sole connection between the control part 2 and the frame of the timer.
  • the widened portion 34 is intended to receive a winding-pinion and the foot of a cock serving to ensure the pivoting of the winding-stem (not shown).
  • the winding-stem has a square passing through the center opening of the winding-pinion and is supported by the cock so that it may be moved rotatingly about its axis and in translation along its axis. It is held towards the outside by conventional means.
  • the inside end of the winding-stem rests against the post 32 so that pressure exerted on the winding-stem moves the sliding link towards the center of the movement in the slot 33.
  • the mechanism also comprises a reverser 7 connected to the control part by a link consisting of a pin 35 integral with the reverser 7 and freely engaged in a hole in the control part 2.
  • the reverser 7 also comprises a profiled notch 36, the two ends of which will cooperate with the upper portion of the stud of the post 32 to limit the pivoting range of the reverser 7 with respect to the control part 2.
  • the reverser 7 may be seen in one of its end positions. It is held axially in place with play by a washer (not shown) driven onto the upper portion of the stud of the post 32, and the plate cover holds the control part 2, which is, however, engaged under the navette jumper 8.
  • the reverser 7 can cooperate with the hammer 6 and with the control spring 9. It bears a pin 37 which cooperates with one end of the spring 9, the latter being an arched and bent wire held at one end between the plate 1 and the plate cover by means of two studs 38 and 39. Furthermore, one end of the reverser 7 is triangular in shape, extends above the hammer 6, and cooperates with a pin 40 set into the hammer 6. The pin 37 is so disposed that when the reverser 7 pivots counterclockwise, starting from the position shown in FIG. 1, with respect to the control part 2, it strikes against a shoulder 20 of the control part 2.
  • the shoulder 20 extends approximately perpendicular to the longitudinal axis of the slot 33; and the point at which the pin 37 comes in contact with the shoulder 2a is situated on one side of the axis of the slot 33, whereas the point of linkage between the reverser 7 and the control part 2 is situated on the other side of that longitudinal axis, as may be seen in FIG. 1.
  • FIG. 1 shows the mechanism in the retum-tozero position.
  • the flirt 3 is held in blocking position by one of the arms of the navette jumper 8, while the hammer 6 is held in zero position by the navette 5, which is blocked by the incline 27 pressing on the stud 31.
  • the hammer 6 is also subjected, via the pin 40 and the beak of the reverser 7, to a force which tends to move it away from the heart-pieces l4 and 15.
  • the control part 2 When the control-stem is released, the control part 2 is subjected by the spring 9, via the pin 37, to a force which is applied to the shoulder 2a, thus to a point shifted towards the right with respect to the axis of the slot 33.
  • the control part 2 tends to pivot counterclockwise while moving in such a way that the post 32 resumes the place in the slot 33 which it occupies in FIG. I.
  • the finger 41 comes to strike against the side of a notch 3c of the flirt 3.
  • the mechanism has passed into the position shown in FIG. 2, and the seconds-hand is set in motion, the movement of the pin 12 having had the effect of displacing the brake-lever of the fourth wheel as well.
  • the control part 2 which is still subjected to a counterclockwise torque, moves with the post 32 in such a way that the finger 4] follows along the side of the notch 5b and reaches the bottom of it, then causes the navette 5 to pivot clockwise in order to return it to the position of FIG. 1.
  • This movement entails a displacement of the hammer 6 which is a movement of rotation and translation guided by the joint 23, 22 and by the link l6, l8, and this returns the heart-pieces 14 and 15 to the zero position.
  • the pin 40 catches the finger of the reverser 7 and causes it to pivot clockwise, tensing the spring 9 and bringing the reverser 7 into the position shown in FIG. I, in which the torque to which the control part 2 is subjected in a clockwise torque, so that when the pressure exerted on the controlstem is removed, the finger 41 moves and comes to press against the side of the hollow 3a of the flirt 3.
  • FIGS. 4 and 5 illustrate an embodiment in which it is possible to restart the secondshand after having stopped it, without returning it to zero.
  • parts identical to those which have just been described are to be found.
  • the reverser 7 no longer appears and as may be seen in FIG. 4, the free end of the control spring 9 acts directly upon the shoulder 2a of the control part 2.
  • the post 32 is still engaged in the slot 33.
  • the hole for the link-pin 3S exists in the control part 2 but is not used in this embodiment. Instead, a projecting pin 42 is attached about midway down the length of the control part 2.
  • the navette jumper 8 has been eliminated. It is replaced by a control reverser spring 43 consisting of a hairpin-shaped wire, one of the arms of which has a bend which cooperates with the stud 30, and by a navette spring 44 consisting of a blanked plate, the free end of which acts under the navette 5 in front of its pivoting point 11.
  • the navette 5 is blanked in a slightly different shape from the one in FIGS. 2-3. It is urged by the spring 44 to rotate counterclockwise, i.e., in the direction which holds the hammer 6 away from the heartpieces l4 and 15.
  • An opening 45 in the plate cover is shown in dot-dash outline. One of the arms of the spring 43 presses against the side of the opening 45.
  • the spring 43 passes around a stud enabling the articulation of the navette spring 44, and the free end of its bent arm extends opposite the pin 42.
  • a push-piece bar 46 consisting of a blanked and bent plate, a flat bar-shaped portion of which is accommodated in a slot which forms the opening 45 in the plate cover.
  • a notch Near the end of the push-piece bar 46 is a notch which is engaged on the stud 31 of the navette 5.
  • the outer end of the push-piece bar 46 has a head provided with a slot 47 in which the stud 48 fastened to the plate 1 is engaged.
  • FIGS. 4 and 5 further comprises a bolt 49 pivoted on a pin 50 and acted upon by a springwire 51 tensed between the plate 1 and the plate cover.
  • the bolt 49 cooperates with the push-piece bar 46.
  • FIG. 4 shows the mechanism in the running position, i.e., a position corresponding to that of FIG. 2.
  • the finger 41 of the control part 2 presses against the side of the notch 30 in the flirt 3. It is held in this position by the end of the spring 9 which acts upon the end of the shoulder 2a and by the control-stem, which holds the post 32 in the slot 33.
  • the finger 41 causes the flirt 3 to pivot clockwise by engaging in the notch 3c, so that the flirt 3 passes into the position shown in FIG. 5, which is the same as that of FIG. 3.
  • the flirt 3 is held by the end of the spring 44, which enters 7 a notch 3f.
  • the stud 30 describes an are about the arbor l and leaves the bent portion of the spring 43. It tenses the free arm of the spring 43 by causing the end of it to press against the pin 42.
  • the effect of this action is to exert a clockwise torque on the control part 2 to such an extent that the control part 2 pivots about the post 32 when the pressure is taken off the control-stem, so that the finger 41 comes to press against the side of the notch 30 (FIG.
  • the control part 2 is held in the position shown in FIG. 5 by the spring 43, the torque of which, produced by the stud 30 which has passed beyond the bend in the spring 43, is greater than the opposing torque of the spring 9.
  • an incline 3d of the flirt 3 has come to press against the bolt 49 and has caused it to pivot against the force of its spring 51 into a position of disengagement.
  • the stud 48 for guiding the part 46 is the same one which serves to fix the navette jumper 8 in the first embodiment.
  • Another variation of the mechanism described above consists in removing the bolt 49 and its spring 51 and in eliminating a beak 5c of the navette 5 according to the dot-dash lines in FIGS. 4 and 5.
  • This design thus enables the heart-pieces l4 and 15 to be returned to zero at any time by pressing on the push-piece bar 46, with out having to stop the seconds-hand.
  • control part 2 cooperates with an arrangement which, under certain conditions, applies a clockwise torque to it, so that it then rotates about the axis of the post 32.
  • This arrangement consists of the reverser 7 and the hammer 6 in the first embodiment and of the control reverser spring 43 in the second embodiment.
  • the navette 5 is joined by the tip 23 and the notch 22 to the hammer 6, which, guided by the slot 16 and the stud l7, acts upon the heart-pieces l4 and 15 by means of its two flat edge portions 19 and 20.
  • the return-to-zero mechanism operates in the same way as in the first embodiment.
  • a spring-wire 52 acts upon the navette 5 to the right of its arbor 11 and thus returns both it and the hammer 6 to their resting positions.
  • the springwire 52 is mounted on a pin 53 and a stud 54 which are integral with the plate 1.
  • FIGS. 6 and 7 comprises a flirt 55 of a difierent shape from the flirt 3. However, it pivots about the same arbor l0 and bears the same brace 4. In order to block and release the balance, it rotates about the arbor 10 through the same distance as does the flirt 3.
  • the periphery of the flirt 55 is a hollow 55a in the shape of an arc of more than engaged in which is the head of a resilient arm 56 blanked in a spring-plate 57 which is pivotingly mounted about a stud 58 integral with the plate 1.
  • the stud 58 served in the second embodiment to position the spring-wire 51 acting upon the bolt 49.
  • the blanked plate 57 constitutes a control plate. It has a second resilient arm 59 which ends in a triangular beak cooperating with a stud 60 set in the plate 1. Along its periphery, it also has a hollow 61 which accommodates the stud 48.
  • the plate 57 is controlled by an auxiliary push-piece which will be disposed in the same location as the one which controlled the push-piece bar 46; but instead of effecting a movement of translation like the push-piece bar 46, the plate 57 pivots about the stud 58.
  • the push-piece cooperating with the plate 57 must be a double-action one.
  • the plate 57 is shown in its innermost position, and the stud 60 is acting upon an incline of the triangular end of the arm 59 so that the plate 57 is urged to rotate clockwise.
  • the control part 2 effects a movement of translation, with the finger 41 moving along the side of the notch 5b, and then causes the navette 5 to rotate against the action of the spring 52.
  • the beack Sc of the navette 5 causes the flirt 55 to pivot into a position which blocks the balance, but this movement takes place without any displacement of the plate 57.
  • Only the resilient arm 56 bends inwardly.
  • the control part 2 resumes its position as in FIG. 6, under the influence of the spring 9.
  • the navette 5 and the hammer 6 owing to the spring 52, and the arm 56 returns the flirt 55 to the disengagement position, i.e., that shown in FIG. 6.
  • the auxiliary push-piece To control the stopping of the seconds-hand, the auxiliary push-piece must be pulled out so as to cause the plate 57 to pivot counterclockwise.
  • the plate 57 then comes into the position shown in FIG. 7, where the triangular head of the arm 59 may be seen to have passed on to the other side of the stud 60, so that the plate 57 is urged to rotate counterclockwise, and the other edge of the hollow 6I presses against the stud 48.
  • the arm 56 then holds the flirt 55 in the position where the balance is blocked.
  • This embodiment therefore makes it possible to take quick readings of the time, followed by a return to zero and an immediate re-starting of the seconds-hand. Moreover, it also makes it possible to start and stop the seconds-hand several times in succession, as in the second embodiment, the ditference being that the auxiliary push-piece must be alternately pushed and pulled to start and stop the seconds-hand.
  • the plate 57 might also be controlled by a bolt sliding at the periphery of the movement or by two push-pieces, both operated by pressure.
  • control part 2 cooperating with either one or the other of two pivoting members, i.e., the flirt or the navette, or alternately with one and then the other of those members, which makes it possible to use the same parts in the construction of timers of different types and, consequently, to improve the efficiency of their manufacture while at the same time ensuring the production of those types of timers which correspond to the practical requirements.
  • the kinematic chain connecting the hammer to the control member via a pivotingly-mounted na vette is so arranged that the return to zero is carried out directly by the pressure of the users finger, whereas in certain known timersespecially those where three functions are performed by means of the crownthe hammer is controlled by a spring which must be strong enough to actuate the heart-pieces in all positions.
  • the fact that the return to zero is carried out by the direct pressure of the users finger is an advantage in these various types of timers.
  • a time piece movement comprising a frame, a time-recording member, a timing element with a balance and a balance-spring, and a mechanism for starting, stopping, and returning said time-recording mem ber to zero, said mechanism comprising a control part connected to said frame by a sliding link and having a control finger, two controlled parts consisting of a balance flirt and a navette for actuating the return-to-zero of said time-recording member, a control spring, a push piece acting onto said link for sliding it, thereby displacing said control part from a resting position into an active position against the action of said spring, and force applying means for applying the force of said spring to said control part along a line which in said resting position passes alongside said link, said control part being subjected by said spring and by said pushpiece to a torque which presses said control finger against one of said controlled parts.
  • said force applying means comprises a reverser part, a link connecting said reverser part to said control part, a pin affixed to said reverser part, an end portion of a control spring coacting with said pin, and a shoulder on said control part for abuttting said pin, said shoulder and said link being situated on both sides of said sliding link, and said reverser being arranged to occupy first and second positions with respect to said control parts, said first position being that in which the control spring force is applied to said link through said pin and said reverser, and said second position being that wherein the control spring force is applied to said shoulder through said pin.
  • each of said controlled parts is fixed in each of its said two predetermined end positions by a respective resilient jumper.
  • said force applying means comprises a shoulder on said control part and an end portion of said control spring acting upon said shoulder, said shoulder being situated alongside said sliding link.
  • a movement in accordance with claim 7, comprising a hammer movable between a zero and a release positions and one or more heart-pieces, wherein said controlled parts are levers pivoting on said frame and movable between two predetermined end positions, said nave tte being connected to said hammer by a swivel-joint, said hammer being connected to said frame by a sliding link and cooperating with at least one said heart-piece, said movement further comprising a reverser spring acting upon a pin secured to said control part, said reverser spring being actuated by one of said controlled parts so as to be moved therewith and acting upon said control part through said pin only when said one of said controlled parts is in one of its said end positions.
  • control part cooperates with only one of said controlled parts so as to cause it to move alternately from one of its said end positions to the other when said push-piece is pressed twice in succession, said movements further comprising an auxiliary push-piece, the other of said controlled parts being subjected to the action of said auxiliary push-piece.

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US531074A 1973-12-07 1974-12-09 Timepiece movement with a timer mechanism Expired - Lifetime US3927519A (en)

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CH1722673A CH576668B5 (es) 1973-12-07 1973-12-07

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100728A (en) * 1976-11-26 1978-07-18 Mattel, Inc. Mechanical digital stopwatch
US4588305A (en) * 1981-12-28 1986-05-13 Nouvelle Lemania S.A. Electronic chronograph watch having analog and digital display of measured time periods
US4922474A (en) * 1987-05-12 1990-05-01 Conseilray S.A. Timepiece and method for its realization
EP1462884A2 (en) * 2003-03-27 2004-09-29 Seiko Instruments Inc. Chronograph having zeroing mechanism
US20090086583A1 (en) * 2007-10-02 2009-04-02 Omega Sa Zero reset device for two time counters
US20110310712A1 (en) * 2009-03-05 2011-12-22 Sowind S.A. Timepiece

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705121C2 (de) * 1997-02-11 2001-07-05 Dirk Dornblueth Nullstelleinrichtung in einer mechanischen Armband- oder Taschenuhr mit Stoppeinrichtung(Chronograph)
CH715493B1 (fr) * 2018-10-24 2023-10-31 Concepto Holding Sa Mouvement d'horlogerie comportant un mécanisme de chronographe et chronographe utilisant un tel mouvement.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925707A (en) * 1950-05-23 1960-02-23 Nicolet Watch Co S A Timepiece
US3823612A (en) * 1971-08-20 1974-07-16 Smiths Industries Ltd Trip mechanisms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925707A (en) * 1950-05-23 1960-02-23 Nicolet Watch Co S A Timepiece
US3823612A (en) * 1971-08-20 1974-07-16 Smiths Industries Ltd Trip mechanisms

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100728A (en) * 1976-11-26 1978-07-18 Mattel, Inc. Mechanical digital stopwatch
US4588305A (en) * 1981-12-28 1986-05-13 Nouvelle Lemania S.A. Electronic chronograph watch having analog and digital display of measured time periods
US4922474A (en) * 1987-05-12 1990-05-01 Conseilray S.A. Timepiece and method for its realization
EP1462884A2 (en) * 2003-03-27 2004-09-29 Seiko Instruments Inc. Chronograph having zeroing mechanism
EP1462884A3 (en) * 2003-03-27 2006-02-22 Seiko Instruments Inc. Chronograph having zeroing mechanism
US20090086583A1 (en) * 2007-10-02 2009-04-02 Omega Sa Zero reset device for two time counters
EP2045672A1 (fr) 2007-10-02 2009-04-08 Omega SA Dispositif de remise à zéro de deux compteurs de temps
JP2009085957A (ja) * 2007-10-02 2009-04-23 Omega Sa ２つのタイム・カウンタ用のゼロ・リセット装置
US7871197B2 (en) 2007-10-02 2011-01-18 Omega Sa Zero reset device for two time counters
US20110310712A1 (en) * 2009-03-05 2011-12-22 Sowind S.A. Timepiece

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CH1722673A4 (es) 1975-11-14
GB1482558A (en) 1977-08-10
CH576668B5 (es) 1976-06-15

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