US3714774A - Correction mechanism for calendar watches - Google Patents

Correction mechanism for calendar watches Download PDF

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Publication number
US3714774A
US3714774A US00207222A US3714774DA US3714774A US 3714774 A US3714774 A US 3714774A US 00207222 A US00207222 A US 00207222A US 3714774D A US3714774D A US 3714774DA US 3714774 A US3714774 A US 3714774A
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US
United States
Prior art keywords
correction
finger
watch
date
winding
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Expired - Lifetime
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US00207222A
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English (en)
Inventor
R Zaugg
W Glanzmann
J Fluck
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A Schild SA
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A Schild SA
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Publication date
Application filed by A Schild SA filed Critical A Schild SA
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Publication of US3714774A publication Critical patent/US3714774A/en
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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
    • G04B19/25—Devices for setting the date indicators manually

Definitions

  • Numerous calendar watches are at present equipped with a correction mechanism which makes it possible to change the indicating member or members of the calendar without changing the position of the hands.
  • This mechanism is very frequently actuated by the winding stern which is brought for this purpose into a correction position which differs from the time-setting position and the winding position. In this position, rotation imparted to the stem causes rapid movement of the date indicating member with respect to a window on the dial.
  • Most watches are provided with an annular date indicating member.
  • One known correction mechanism has a rigid finger capable of pivoting around a shaft and of moving in translation in such a manner that a pendulum movement imparted to the winding stem causes the end of the finger to describe a closed curve which passes once into the teeth of the date member and advances it one step.
  • correction mechanisms of the same type comprise, rather than a correction finger, a star or member with an elastic arm pivoting around a fixed shaft so as to act on the teeth of the date member. Some of these mechanisms are also designed in such a manner that the correction member can actuate another indicating member, for instance a member indicating the days of the week.
  • the object of the present invention is to provide a correction mechanism which has the advantage over these known mechanisms of a simpler construction comprising a smaller number of parts operating in a more reliable manner which excludes any possibility of the correction member remaining, after its actuation, in a position in which it interferes with the normal displacement of the indicating member when the latter is duly actuated by the movement of the calendar watch.
  • a correction member which has a single rigid radial finger which, upon a pivoting movement between a first and second position, cooperates with drive means for the indicator member.
  • the mechanism includes a return element which acts on the correction member to bring it back into the first position.
  • the indicating member drive means is arranged so that a pendulum displacement of the correction member from the first position to the second position and from the second position to the first position causes an advance by one step of the indicating member only during one of the alternations of the said pendulum movement, the said indicator member remaining in the same position upon the other alternation of the pendulum movement.
  • FIG. 1 is a fragmentary top plan view of a watch provided with an embodiment of the invention.
  • FIG. 2 is a sectional view along the line II--H of In the drawing there can be noted a part of a calendar watch movement the pillar plate 1 of which bears a date ring 2 and a day star 3 having fourteen teeth rigidly connected with an indicating disk (not shown) which covers the drive mechanism and the correction mechanism and the indications of which appear in a window provided in the dial, while the dates from 1 to 31 which are borne by the ring 2 appear in another window also provided in the dial.
  • An aperture 4 is provided in the pillar plate to receive, as in an ordinary watch movement, various parts of the winding and setting mechanism, including the winding pinion and the clutch pinion (not shown).
  • a setting wheel 5 is in engagement with the clutch pinion when the winding stem (not shown) is in position for setting the hour and minute hands of the watch. In this position it is connected by transmission wheel 6 and by intermediate wheel 7 to the minute wheel (not shown) so as to permit manual movement of the hands.
  • the stem may occupy a third position which differs from the winding position and the setting position, which third position is referred to as the correction position and also corresponds to the engagement of the clutch pinion with the setting wheel 5.
  • the correction member 9 comprises a shaft 11 one end of which has a flat surface 12. On this end of the shaft 11 there are engaged on the one hand a correction plate 13 and on the other hand a heart-shaped cam 14. As the central openings of these two parts are of noncircular shape and have a flat surface corresponding to that of the shaft 11, they are firmly connected to the shaft and rotate therewith.
  • a washer 10 is interposed between the plate 13 and the cam 14.
  • cam 14 has the shape of a heart having a notch 14a centrally disposed between a first curved surface 14b and a second curved surface 140. These two arcuate surfaces are of different lengths.
  • Plate 13 is provided with a radial finger 13a and, on each side of this finger, two shoulders or stop surfaces 13b and respectively which are directed radially and are located at diflerent distances from the finger 13a.
  • the shaft 11 passes through a circular opening provided in a plate 15 which is fastened on the pillar plate 1 and which constitutes the setting lever spring of the winding and setting mechanism while serving to hold various parts of said mechanism in position and guide them.
  • the correction mechanism furthermore comprises as an essential element a stamped spring plate 16 having two arms 17 and 18. It also comprises pin 19 and a drive lever 20.
  • the plate 16 is fastened to the pillar plate 1 by a screw 21 and by guides 22 and 22a and one of its two arms 17, 18 extends towards member 9 while the other extends towards the lever 20.
  • the arm 17 is provided at its free end with a triangular protrusion which rests laterally against the cam 14.
  • the arm 18 which extends to the same height as the arm 17, it engages in a slot of circular contour 23 provided in the lever 20, the entrance to said slot being slightly larger than the width of the end of the arm 18. In this way arm 18 normally holds the lever 20, which pivots around a flange around an aperture in bridge 29.
  • a screw 24 fastens the bridge to the pillar plate in a position of rest with L-shaped end 25 of the arm of lever 20 opposite the day star 3.
  • a stud 26 is fastened to the end of another arm of lever 20 in the vicinity of the member 8 and in the path of the fingers 13a. The head of screw 24 rests on the flange of bridge 29 and secures it against plate 1.
  • pin 19 is a cylindrical stud which is force-fitted into an opening in the plate 15. This pin is located in the path of the stop surfaces 13b and 13c with which it cooperates to determine the limits of the pivoting of the member 9.
  • the inner teeth 27 of the date member 2 also lie in the proximity of the member 9.
  • the jumper (not shown) which fixes the position of the date ring is arranged and placed in such a manner that one of the teeth 27 is in the path of the finger 13a at a place such that a displacement of said finger in one direction does not result in shifting of the date member 2, while a displacement in the other direction results in such shifting.
  • the tooth closest to the member 9 is in an asymmetrical position with respect to the radial line connecting the common axis of the members 2 and 3 with the axis of the member 9.
  • the member 9 When the winding stem is in a position other than the correction position or when it is brought into said position, the member 9 has a first orientation or neutral orientation shown in FIG. 1.
  • the end of the arm 17 is engaged in the notch 14a of the cam 14 and assures the stability of the member 9 by resting against it due to its pre-cocking. If from this position the crown of the winding stem is turned in clockwise direction as seen from the outside of the watch, the member 9 is driven in the counter-clockwise direction as shown in FIG. 1. It can carry out a pivoting movement, while the arcuate portion 14b slides below the protrusion of the arm 17 until the stop 13b comes into contact with the pin 19. It then reaches a second critical orientation.
  • the crown of the winding stem is turned in counter-clockwise direction as seen from the outside of the watch.
  • the arcuate shaped portion 14c which engages below the protrusion of the arm 17 and the finger 13a moves in clockwise direction as shown in FIG. 1. It hooks the stud 26 of the lever 20 and displaces said lever in such a manner that its projection 25 engages in the teeth of the star 3 and displaces it by two notches of its toothed surface.
  • the stop 13c comes into contact with the pin 19.
  • the member 9 thus reaches its third critical orientation. The movement of rotation necessary for this is obviously less than that necessary to actuate the date member, for which reason the arcuate portion 14c is shorter than the arcuate surface 14b and the stop 13c is, in neutral position, closer to the pin 19 than the stop 13b.
  • a correction mechanism comprising only a small number of parts which makes it possible to correct both the date indicating member and the day indicating member by a simple pendulum movement of the drive member formed, in the embodiment described, by the winding crown placed in correction position.
  • the correction position of the winding stem may be an inner position into which the stem comes by pressure exerted on the crown against the action of a spring, which position is therefore not fixed. It may also be an outer position in which the stem is maintained only under the etfect of a pull exerted against the action of a spring. Finally, it may also be an intermediate position located between the time-setting position and the winding position and established by known means.
  • correction drive member may also be an auxiliary crown fastened to the end of a stem passing through the case alongside the winding stem.
  • the mechanism described can also be used in the event that the calendar watch has only a single indicating member which advances once every 24 hours, for instance in a watch having only the dates.
  • the essential advantage of the correction mechanism described above is that it is of the digital type. As has been shown above, a pendulum movement of the correction member between the neutral position and the stop with return to the neutral position causes an advance by one step of the date member or of the member indicating the days of the week. Thus, at the end, for instance, of a month, if it is necessary to advance the date ring by one step, the correction can be eifected even without the user looking at the dial of the watch. By manupulating the crown between his two fingers or even with only a single finger, he feels the limits of the possible pendulum movement and thus controls the correction by feel. The same is true if the correction is to cover several dates or several days of the week.
  • a calendar watch having a date indicator actuated by the movement of the watch at twenty-four hour intervals and a stem adapted to be rotated while in a nonwinding and non-setting position, means responsive to rotation of the stem while in the said position for manually actuating the said date indicator comprising a shaft, means fixed on the shaft for rotation therewith carrying a single rigid finger disposed to engage and move said indicator one unit only when rotated in one direction from a first position to a second position, means for engaging said finger and stopping rotation of said means carrying the finger when the second position is reached, and means for rotating the said fixed means in an opposite direction until the said finger is returned to its said first.
  • the said means for actuating the date indicator has a circular periphery extending on each side from said finger each of which terminates in a shoulder extending radially inwardly at a position peripherally spaced from the finger and each other and a circular peripheral edge of less diameter than that of the first said circular periphery, and means adapted to engage said shoulder and to stop rotation of the said finger carrying means from the said first position when the second position is reached.
  • the watch of claim 1 combining with the said date indicator a means for indicating the day of the week and means for actuating the day indicator responsive to rotation of the stem in a direction opposite to that for actuating the date indicator comprising a rotatable star coaxial with the date indicator and adapted to rotate and move the day indicator when the finger moves from the said first position to a third position.
  • the date indicator comprises a ring having thirty-one spaced internal teeth, said ring being positioned at rest asymmetrically with respect to the radial line of the common axis of the said indicators and shaft.
  • drive means for the day indicator comprises a shaft, a drive lever which pivots around the shaft, and means having one end thereof disposed in the path of the said finger between the first and third positions adapted to move said star about its shaft.
  • said date indicator comprises a ring, inwardly projecting spaced teeth carried by the ring, a shaft, cam means on the shaft adapted to rotate therewith, said cam having a recess therein, means adapted to mate with said recess and support said cam against rotation while at rest, a disk shaped member secured for rotation with said shaft having a single finger adapted only to engage one of said teeth as the finger is moved in one direction about said shaft, said member having a circular peripheral edge adjacent each side of the finger and terminating in a pair of peripherally spaced shoulders which extend radially inwardly and which are peripherally spaced from each other, said peripheral edge which precedes said finger as it is rotated from the first towards and second position being shorter than the trailing edge, means for rotating the cam and disk member until the finger has returned to the first position and said mating means is again in said recess in the cam.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)
US00207222A 1970-12-14 1971-12-13 Correction mechanism for calendar watches Expired - Lifetime US3714774A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1849070A CH542471A (fr) 1970-12-14 1970-12-14 Mécanisme de correction pour montre-calendrier

Publications (1)

Publication Number Publication Date
US3714774A true US3714774A (en) 1973-02-06

Family

ID=4433326

Family Applications (1)

Application Number Title Priority Date Filing Date
US00207222A Expired - Lifetime US3714774A (en) 1970-12-14 1971-12-13 Correction mechanism for calendar watches

Country Status (5)

Country Link
US (1) US3714774A (ja)
JP (1) JPS526108B1 (ja)
CH (2) CH1849070A4 (ja)
DE (1) DE2159330C3 (ja)
FR (1) FR2117864B1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109458A (en) * 1975-11-27 1978-08-29 Kabushiki Kaisha Daini Seikosha Date and day correcting device of a timepiece

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109458A (en) * 1975-11-27 1978-08-29 Kabushiki Kaisha Daini Seikosha Date and day correcting device of a timepiece

Also Published As

Publication number Publication date
JPS526108B1 (ja) 1977-02-18
CH1849070A4 (ja) 1973-03-30
DE2159330C3 (de) 1975-12-04
DE2159330A1 (de) 1972-06-15
FR2117864B1 (ja) 1976-06-04
FR2117864A1 (ja) 1972-07-28
CH542471A (fr) 1973-03-30
DE2159330B2 (de) 1975-04-24

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