US3775966A

US3775966A - Day-and-date changing device for a wrist watch

Info

Publication number: US3775966A
Application number: US00270193A
Authority: US
Inventors: E Matsuura
Original assignee: Seiko Instruments Inc
Current assignee: Seiko Instruments Inc
Priority date: 1971-07-08
Filing date: 1972-07-10
Publication date: 1973-12-04
Anticipated expiration: 1990-12-04
Also published as: CH1022472A4; IT961313B; CH572235B5; FR2144826B1; JPS4818170U; GB1371455A; JPS5214462Y2; FR2144826A1

Abstract

A wrist watch is provided with a rotatable day wheel containing indicia denoting the different days of the week and a date ring containing indicia denoting the date. A clutch member is axially slidable along the watch winding stem through a lever system in response to axial movement of the winding stem, and the clutch member is moved into engagement with a winding pinion or a gear system to respectively effect winding of the watch mainspring or changing of the day and date settings in dependence upon the extent of said movement of the winding stem and its direction of rotation. The lever system includes a pivotal setting lever connected to the winding stem and a pivotal clutch lever engageable with and driven by the setting lever to effect axial movement of the clutch member. The clutch lever has a recess therein which cooperates with a projection on the setting lever to disengage the two levers during axial movement of the winding stem thereby preventing unintentional changing of either the day or date settings during axial movement of the winding stem.

Description

United States Patent 1 Matsuura [75] Inventor: Eiichi Matsuura, Chiba, Japan [73] Assignee: Kabushiki Kaisha Daini Seikosha,

Tokyo, Japan [22] Filed: July 10, 1972 [21] Appl. No; 270,193

[30] Foreign Application Priority Data July 8, 1971 Japan 46/59903 [52] US. Cl. 58/58 [51] Int. Cl. G04b 19/24 [58] Field of Search 58/4, 5, 58

[56] References Cited UNITED STATES PATENTS 3,470,687 10/1969 Ono et al. 58/58 3,470,688 10/1969 Miyasaka... 58/58 3,597,916 8/1971 Nakagawa.. 58/58 3,691,756 9/1972 Ono 58/58 DAY-AND-DATE CHANGING DEVICE FOR A WRIST WATCH Dec. 4, 1973 Primary Examiner-George H. Miller, Jr.

Attorney-Robert E. Burns et al.

[5 7 ABSTRACT A wrist watch is provided with a rotatable day wheel containing indicia denoting the difierent days of the week and a date ring containing indicia denoting the date. A clutch member is axially slidable along the watch winding stem through a lever system in response to axial movement of the winding stem, and the clutch member is moved into engagement with a winding pinion or a gear system to respectively effect winding of the watch mainspring or changing of the day and date settings in dependence upon the extent of said movement of the winding stem and its direction of rotation. The lever system includes a pivotal setting lever connected to the winding stem and a pivotal clutch lever engageable with and driven by the setting lever to efi'ect axial movement of the clutch member. The clutch lever has a recess therein which cooperates with a projection on the setting lever to disengage the two levers during axial movement of the winding stem thereby preventing unintentional changing of either the day or date settings during axial movement of the winding stem.

I 10 Claims, 6 Drawing Figures PAIENTEU 4W5 3 775 966 SHEET 1 or 5 FIG.

PATENTEU DEC 41973 SHEET 2 BF 5 vllllllllli PATENTED 41975 3.775.966

SHEET 5 [1F 5 FIG. 5

DAY-AND-DATE CHANGING DEVICE FOR A WRIST WATCH 'ner.

Many types of wrist watches are currently available which visibly display both the day of the week and the date of the year and such watches include a day and a date changing device for selectively changing the day and date as desired. It is quite common in such watches to effect the day and the date correction by first pulling out the winding stem .of the watch and then turning the winding stem in one direction to change the day setting and turning the winding stem in the other direction to change the date setting.

Unfortunately, the prior art day-and-date changing mechanisms aredisadvantageous and oftentimes malfunction due to unintentional rotation of the winding stem as same is shifted from either the mainspring winding position or the hand-setting position to the day-and-date changing position. As a result, either the day of the week or the date of the year is inadvertently changed if the winding stem is rotated while being shifted between the various working positions.

It is therefore a primary object of the present invention to provide a day-and-date changing device for use in a wrist watch and which accurately and quickly sets either the day of the week or the date of the year.

It is another object of the present invention to provide a day-and-date changing device which prevents accidental changing of the day or date during shifting of the winding stem into and out of the day-and-date changing position. It is a further object of the present invention to provide a day-and-date changing device which is simple in construction, accuratein operation and rugged in nature.

The above and other objects of the present invention are carried out by a day-and-date changing device com- .prising a rotatable date ring and a rotatable day wheel which visibly display the day and date during running.

of the watch and having a pivotal setting lever connected to the watch winding stem and pivotal to various .working positions in response to axial shifting of the winding stem. Pi'votalmovement of the setting lever actuates a clutch lever to effect engagement of a clutch member with either a setting wheel of the day-and-date changing device or a winding pinion of the watch mainspring. A swing lever is frictionally engaged with the shaft of the setting wheel and is pivoted between two working positions in response to rotation of the setting wheel in either of two opposite directions.

A motion transmitting wheel is connected to the swing lever and engages with the day wheel when the swing lever is swung into one working position and engages with the date ring when the swing lever is swung into the other working position to effect the appropriate day and date settings in response to rotation of the winding stem. The clutch lever is provided with a recessed portion in which a portion of the setting lever temporarily rests during shifting of the winding stem between the various working positions and a biasing spring urges the clutch lever in a direction to effect disengagement of the clutch member from the setting wheel whenever the setting lever is resting in the recess thereby preventing inadvertent operation .of the dayand-date changing device until the winding stem is shifted to the correct position.

Having in mind the above and other objects that will be evident from an understanding of this disclosure, the present invention comprises the combinations and arrangements of parts as illustrated in the presently preferred embodiment of the invention which is hereinafter set forth in sufficient detail to enable those persons skilled in the art to clearly understand the function, operation, construction and advantages of it when read in conjunction with the accompanying drawings wherein like reference characters denote like parts in the various views and wherein:

FIG. 1 is a schematic plan view of a watch embodying the day-and-date changing device of the invention and showing the various watch parts in a mainspring winding position;

FIG. 2A is a plan view of a portion of the day-anddate changing device;

FIG. 2B is a cross-sectional view taken along line AA in FIG. 2A;

FIG. 3 is a schematic plan view similar to FIG. 1. but showing the various parts in the day-and-date changing position foreffecting a day setting;

FIG..4 is a schematic plan view similar to FIG. 1 and showing the parts in the day-and-date changing position for effecting a date setting; and

FIG. 5 is a schematic plan view similar to FIG. 1 and showing the partsin a hand-setting position.

FIG. 1 discloses the interior of a portion of a wrist watch embodying'the day-and-date changing device of the present invention and shows the various watch parts in their winding position whereby the watch mainspring may be wound in response to rotation of the watch stem.,The day-and-date changing device comprises a switch lever l pivotally mounted on a pin lb fastened to a frame plate 20 of the watch. The switch lever l is generally L-shaped and the base portion of the L includes a camming projection la and an elongated slot 1d whereas the long side portion of the L comprises an elastic spring member terminating in an end portion 10 engaged with a pin 20a fastened to the frame plate 20. The spring member tends to restore the switch lever to the winding position shown in FIG. 1 whenever the lever is pivoted in a clockwise direction about the pin lb.

A swing lever 2 is pivotally mounted on one end of the base portion of the switch lever 1 by frictionally engaging with a rotatable pin 2a. The pin 2a is connected to a toothed setting wheel 3 and due to the frictional engagement of the swing lever 2 with the pin 2a, angular movement of the setting wheel 3 acts through the pin 2a to frictionally drive the swing lever 2. As best seen in FIG. 2, an intermediate gear wheel 4 is in meshing engagement with the setting wheel 3 and is rotatably mounted on the swing lever 2. A toothed transmitting wheel 5 is coaxially connected to the intermediate gear wheel 4 and the gear-wheels 4 and 5 comprise a wheel assembly 6. The swing lever 2, setting wheel 3, and gear wheels 4, 5 comprise transmitting means movable into engagement with a day changing wheel 13 to effect a change in the day setting or into engagement with a date ring 19 to effect a change in the date setting depending upon the direction of rotation of the winding stem 9, as described in detail hereinafter. The shaft inthe slot 1d, and once the limiting position of the wheel assembly is reached, further rotation of the setting wheel 3 maintains the wheel assembly in the limiting position and slippage then occurs between the pin 2a and the swing lever 2. 7

Turning again to FIG. 1, the watch interior includes a clutch lever spring 7 affixed by screws to the frame plate 20. The clutch lever spring 7 includes a resilient arm having therein a pair of

recessed portions

7a and 7b which are stepped relative to each other and a planeredge 7c. A setting lever 8 is pivotally mounted on a pin 8a connected to the frame plate 20 and the setting lever has a generally planer configuration with the exception of a projection 8b extending outwardly therefrom into the plane of the paper and another projection 8c extending outwardly therefrom out of the plane of the paper. The setting lever 8'also includes a flat camming surface portion 8d in slidable contact with the camming projection 1a of the switch lever l and an arcuate camming projection 8e.

A winding stem 9 extends radially outwardly from the center of the watch and projects outwardly from the periphery of the watch casing and only a portion of the winding stem is visible in the drawings. The winding stem is provided with an annular groove and the projection 8b extends into the groove thereby connecting the winding stem to the setting lever 8. The winding stem 9 is. mounted for axial movement to a winding position such as shown in FIG. 1, to a day-and-date changing position such as shown in FIGS. 2 and 3, and to a handsetting position such as shown in FIG. 5. During axial movement of the winding stem 9 from the mainspring winding position shown in FIG. 1 to either of the other .two positions, the movement of the winding stern acts through the projection 8b to pivot the setting lever 8 in a clockwise direction about the pin 8a.

Also mounted on the frame plate 20 is a clutch lever 10. The clutch lever 10 is mounted for pivotal movement about a pin 10a and the clutch lever includes a camming projection 10b engageable with the arcuate projection 8e on the setting lever 8, a camming projection 100 engageable with the flat camming surface 8d of the setting lever 8, a camming projection 10d also engageable with the arcuate projection 8e on the setting lever 8 and an arcuate recessed portion Me for receiving therein the arcuate projection 8e. Biasing means comprising a biasing spring 11 continuously biases the clutch lever 10 in a clockwise direction.

A day wheel '14 is rotatably mounted on the frame plate 20 and contains indicia denoting the seven days of the week whereby rotation of the day wheel causes the day indicia to revolve past a window (not shown) provided in the watch face to visibly display the day. The day wheel 14 includes a set of gear teeth on the periphery thereof and a toothed day-changing wheel 13 is rotatably mounted on the frame plate 20 in engagement with the day wheel 14. A toothed minute wheel 15 is rotatably mounted on the frame plate and the minute wheel is connected to the minute and hour hands of the watch to effect their rotation in response to rotational movement of the minute wheel. As seen in FIG. 1, a pawl or daily jumper 17 is pivotally mounted adjacent the day wheel 14 and is biased into contact with the teeth on the day wheel by a spring 18. A date ring 19 is rotatably mounted on the frame plate 20 and contains thereon date indicia denoting the date of the year whereby rotation of the date ring causes the date indicia to revolve past a window (not shown) in the watch face to visibly display the date.

A clutch member 16 is slidably mounted on the winding stem 9 and the clutch member comprises a pair of toothed discs interconnected by a connecting portion. The upper disc is provided with gear teeth engageable with a mating set of gear teeth on the winding pinion 12 when the clutch member is in an upper clutching position. The lower disc is provided with gear teeth engageable with the gear teeth on the setting wheel 3 when the clutch member is in a lower clutching position. The setting lever 8, clutch lever 10 and clutch member 16 comprise engaging means for engaging the winding stem 9 with the transmitting means when the winding stem is in the day-and-date changing position and for engaging the winding stem 9 with the minute wheel 15 through the intermediary of the setting wheel 3 of the transmitting means when the winding stem is in the hand-setting position. The distal end of the clutch lever 10 comprises a clutch arm which extends between the pair of spaced apart discs and sufficient clearance is provided to enable the clutch lever 10 to pivot about the pin 10a to enable the clutch arm to axially slide the clutch member 16 along the stem 9. As-

seen in FIG. 1, the winding stem 9 is provided with a slot therein and the clutch member 16 includes a key in sliding engagement with the slot and thus the clutch member is splined onto the winding stem and is mounted for rotation with the winding stem as an integral unit and is also mounted for axial sliding movement along the winding stem.

The watch parts normally occupy the position shown in FIG. 1 and such corresponds to the mainspring winding position. In this position, the winding stem 9 is in its most retracted position wherein the flat camming surface portion 8d of the setting lever 8 bears against the camming projection 1a of the switch lever l to maintain the switch lever in the position shown and the dayand-date changing device is maintained out of engagement with both the day wheel 14 and the date ring 19. The biasing spring 11 biases the clutch lever 10 in a clockwise direction causing the clutch arm to press against the upper clutch disc of the clutch member 16 to bias the upper clutch disc into engagement with the winding pinion 12.

In this position, the lower clutch disc is not engaged with either the setting wheel 3 nor the minute wheel 15 and rotational movement of the winding stem effects winding of the mainspring (not shown in the drawings). It should be noted that in the winding position, the curved projection 8e of the setting lever is accommodated in a recess in the clutch lever 10 and this enables the clutch lever 10 to be urged in a clockwise direction by the biasing spring 11 to an extent necessary to engage the upper clutch disc with the winding pinion 12.

When the parts are in the winding position shown in FIG; 1, the setting wheel 3 is disengaged from both the clutch member 16 and the minute wheel 15 and therefore the swing lever 2 is free to swing or pivot about the pin 2a except for the frictional engagement between these two members. The frictional engagement between the swing lever 2 and the pin 2a is sufficient to prevent any movement of the swing lever unless accompanied by a corresponding movement of the setting wheel 3 and moreover even if the swing lever 2 does pivot about the pin 2a to one of the limiting positions wherein the transmitting wheel 5 engages with either the date ring 19 or the day-changing wheel 13,.such engagement is harmless since the setting wheel 3 is not capable of being rotationally driven while in the winding position.

When it is desired to effect a day or date setting, the winding stem is pulled out or extended one step to the day-and-date changing position shown in FIGS. 3 and 4. FIGS. 3 and 4 show the same position of the winding stem 9, setting lever 8, clutch lever and switch lever l but show different positions of the swing lever 2 and the transmitting means orwheel assembly 6 which results from rotating the winding stem in either of two opposite directions.

As the winding stem 9 is extended to the day-anddate changing position, the setting lever 8 is pivoted in a clockwise direction about the pin 8a and this motion of the setting lever 8 causes the projection 8c to slide out of the recess 7a and into the recess 7b in the clutch lever spring 7. Additionally, the clockwise movement of the setting lever 8 causes the camming projection 8:5 to swing out of the recessed portion of the clutch lever 10 and engage with the camming projection 10b to urge the clutch lever 10 in a counterclockwise direction about the pin 10a whereupon the distal end of the clutch lever 10 urges the clutch member 16 downwardly until the lower clutch disc engages with the toothed setting wheel 3. In this position, either a day setting or a date setting may be effected depending upon the direction of rotation of the winding stem 9.

FIG. 3 illustrates the position of the various watch parts for effecting a day setting in response to the rotation of the winding stem 9 in the rightward direction.

When the winding stem is rotationally driven in the rightward direction, a corresponding rotation is imparted to the clutch member 16 and due to the engagement of the clutch member with the setting wheel 3, the setting wheel 3 is rotationally driven in a clockwise direction. As the setting lever 3 commences clockwise rotation, the swing lever 2 is pivoted downwardly in the clockwise direction due to its frictional engagement with the pin 2a thereby swinging the motiontransmitting wheel 5 into engagement with the daychanging wheel l3.

Then as the winding stem is further rotated in the leftward direction, the setting wheel 3 is further rotationally driven in the clockwise direction and drives both the intermediate setting wheel 4 and, the motiontransmitting wheel 5 in a counterclockwise direction. The motion-transmitting wheel 5, the day-changing wheel 13 and the day wheel 14 comprise a gear train with the day-changing wheel 13 functioning to convert the counterclockwise rotation of the motiontransmitting wheel 5 into counterclockwise rotation of the day wheel 14 as a functionof the number of gear teeth contained on the respective wheels. The angular displacement of the day wheel 14 in the counterclockwise direction effects a corresponding displacement of the day-of-the-week indicia and thereby the day setting is carried out. It should be noted that manual rotation of the winding stem in the rightward direction is sufficient to cause the day wheel 14 to rotate in a counterclockwise direction against the action of the biasing spring 18 and the pawl 17. v

When it is desired to effect a date setting, the winding stem 9 is rotated in the opposite direction and FIG. 4 illustrates the position of the various watch parts to ,accomplish a date change. As the winding stem 9 is rotated in the leftward direction, the rotation is imparted to the clutch member 16 and due to the engagement of the clutch member with the setting wheel, the setting wheel 3 is rotationally driven in a counterclockwise direction. The counterclockwise motion of the setting wheel 3 effects upward pivotal movement of the swing lever 2 due to the frictional engagement of the swing lever 2 with the pin 2a and the swing lever 2 is swung upwardly to the limiting position shown in FIG. 4.

In response to upward movement of the swing lever 2, the motion-transmitting wheel 5 is moved into engagement with the date ring 19 and therefore continued rotation of the winding stem 9 in the leftward direction causes the setting wheel 3 to rotationally drive the intermediate wheel 4 in a clockwise direction and the motion of the intermediate wheel 4 is transmitted to the motion-transmitting wheel 5 to effect a corresponding clockwise rotation of the motion-transmitting wheel 5. In response to clockwise angular movement of the motion transmitting wheel 5, the date ring 19 is angularly advanced in the clockwisedirection to effect a corresponding change of the date indicia.

In an alternative embodiment, the day-changing wheel 13 may be eliminated and the motiontransmitting wheel 5 may directly engage with the day wheel 14. It is understood that in this embodiment the day wheel 14 would be angularly displaced in a clockwise direction rather than a counterclockwise direction in response to counterclockwise movement of the motion-transmitting wheel 5.

When it is desired to set the hands of the watch, the winding stem 9 is pulled out or extended another step to the position shown in FIG. 5 which illustrates the watch parts in the hand-setting position. As the winding stem 9 is further extended from the watch casing, the setting lever 8 is further pivoted in a clockwise direction and during this movement of the setting lever 8, the flat camming surface 8d moves out of engagement with the upper portion la of the switch lever 1 and slidingly engages with the projection 100 on the clutch lever 10 to effect downward counterclockwise movement of the clutch lever 10 in response to clockwise pivotal movement of the setting lever 8. By this coaction, the clutch lever 10 is pivoted downwardly about the pin 10a and the clutch arm of the clutch lever moves the clutch member 16 downwardly causing the setting wheel 3 to engage with the minute wheel 15. In this position of the setting lever 8, the projecting pin 80 slides into the recess 70 on the clutch lever spring 7 and the setting lever 8 is maintained in this position by the spring action of the clutch lever spring 7.

A bridge plate 21 is fastened to the frame plate 20 and includes a pair of abutment surfaces 21a and 21b. These abutment surfaces are designed to abut with corresponding surface portions on the switch lever 1 to change from inadvertently occurring during the movement of the winding stem from the day-and-date changing position into and out of the hand-setting position. This means comprises a safety recess le formed in the clutch lever 10 and the recess is dimensioned to completely receive therein the arcuate camming projection 8e on the setting lever 8. Thus, as the winding stem 9 is extended from the position shown in FIGS. 3 and 4 to the position shown in FIG. 5, the setting lever 8 is pivoted about the pin 8a in a clockwise direction causing the camming projection 8e on the setting lever 8 to disengage from the camming projection 10b on the clutch lever and enter into the recess Me. This action momentarily disengages the setting lever 8 from the clutch lever 10 whereupon the biasing spring 11 urges the clutch lever 10 upwardly about the pin 10a causing the friction member 16 to momentarily disengage from the setting wheel 3.

By such an arrangement, any rotational movement imparted to the winding stem 9 while same is pulled out to the hand-setting position will not effect any day or date change since the setting wheel 3 is disengaged from the clutch member 16. In addition, any angular motion of the intermediate wheel 4 produced by the swinging movement of the swing lever 2 will not cause the motion-transmitting wheel to actuate either the day-changing wheel 13 or the date ring 19 but instead, will cause the setting wheel 3 to rotate idly since same is disengaged from the clutch member 16.

In a similar manner, the safety recess e prevents unintentional movement of the watch hands during retraction of the winding stern into the watch casing. In is instance, as the winding stem 9 is depressed inwardly from the hand-setting position shown in FIG. 5, the setting lever 8 is pivoted in a counterclockwise direction about the pin 8a causing the camming projection 8e to move into the safety recess 10c provided in the clutch lever 10 thereby temporarily disengaging the setting lever 8 from the clutch lever 10 whereupon the latter is biased upwardly by the biasing spring 11 to disengage the friction member 16 from the setting wheel 3. Thus, any inadvertent rotation of the winding stem 9 is not transmitted to the minute wheel 15 since the friction member 16 is disengaged from the setting wheel 3. Further depression of the winding stem 9 causes further pivotal movement of the setting lever 8 to engage with the camming projection 1a of the switch lever l whereupon the switch lever 1' is urged in a clockwise direction about the pin 1b thereby effecting disengagement of the setting wheel 3 from the minute wheel 15.

The invention has been described in conjunction with one particular embodiment and it is to be understood that obvious modifications and changes may be made without departing from the spirit and scope of the invention as defined in the appended claims.

What I claim and desire to secure by Letters Patent 1. In a wrist watch: day display means automatically angularly displaceable during running of the watch for visibly displaying the day of the week; date display means automatically angularly displaceable during running of the watch for visibly displaying the date; a rotatable winding stem mounted for manual axial movement to a day-and-date changing position and a hand-setting position; movable transmitting means operative when engaged with said winding stem for alternatively moving into engagement with said day display means in response to angular displacement of said winding stem in one direction whereby further angular displacement of said winding stem in said one direction effects angular displacement of said day display means to accordingly change the day setting thereof and movable into enga'gement with said date display means in'response to angular displacement of said winding stem in the other direction whereby further angular displacement of said winding stem in said other direction effects angular displacement of said date display means to accordingly change the date setting thereof; hand-setting means operative when engaged with said winding stem for effecting movement of the watch hands in response to angular displacement of said winding stem to accordingly set the watch hands at the desired time setting; engaging means for effecting releasable engagement of said winding stem with said transmitting means when said winding stem is in said day-and-date changing position and coacting with said transmitting means to effect releasable engagement of said winding stem with said hand-setting means when said winding stem is in said hand-setting position; and preventing means coacting with said transmitting means and said engaging means for preventing angular displacement of both said day display means and said date display means in response to angular displacement of said winding stem during the shifting of said winding stem from said day-anddate changing position to said hand-setting position and from said hand-setting position to said day-and-date changing position.

2. A wrist watch according to claim 1; wherein said engaging means includes a clutch member mounted for axial movement along said winding stem and for rotational movement with said winding stem, a pivotally mounted clutch, lever in engagement with said clutch member and operative in response to pivotal movement thereof to axially move said clutch member along said winding stem into engagement with either said transmitting means or said hand-setting means depending upon the extent of pivotal movement of said clutch lever, and a pivotally mounted setting lever coupled to said winding stem whereby axial movement of said winding stem effects pivotal movement of said setting lever and having a camming projection engageable with said clutch lever to effect pivotal camming movement thereof in response to axial movement of said winding stem.

3. A wrist watch according to claim 2; wherein said preventing means comprises means defining a recess in said clutch lever dimensioned to receive therein said camming projection in response to initial axial movement of said winding stem both from said day-and-date changing position toward said hand-setting position and from said hand-setting position toward said dayand-date changing position thereby permitting slight pivotal movement of said clutch lever relative to said setting lever, and biasing means biasing said clutch lever toward said setting lever and effecting slight pivotal movement of said clutch lever toward said setting lever a distance sufficient to disengage said clutch member from said transmitting means whenever said camming projection is received within said recess.

4. A wrist watch according to claim 2; wherein said transmitting means comprises a rotatable setting wheel having means thereon for engaging with said clutch member when said winding stem is in said day-and-date changing position, a pivotal swing lever, means friction- 9 ally engaging said swing lever with said setting wheel for effecting pivotal movement of said swing lever in response to angular displacement of said setting wheel and for permitting slippage'between said swing lever and setting wheel, and a wheel assembly rotatably mounted on said swing lever for pivotal movement therewith and in constant engagement with said setting wheel and engageable with either said day display means or said date display means in response to and depending upon the direction of pivotal movement of said swing lever effected by rotation of said winding stem.

5. A wrist watch according to claim 2; wherein said clutch member comprises a pair of clutch discs each having means for releasably engaging with one of said hand-setting means and said transmitting means, and means interconnecting said clutch discs in spaced-apart opposed relationship.

6. A wrist watch according to claim 2; wherein said day display means comprises a rotatable day wheel having indicia thereon denoting the different days of the week; and wherein said date display means comprises a rotatable date ring having indicia thereon denoting different dates.

7. A wrist watch according to claim 1; including means mounting said winding stem for manual axial movement to a winding position in addition to said dayand-date changing position and said hand-setting position; winding means operative when engaged with said winding stem for effecting winding of the watch mainspring in response to rotation of said winding stem; and wherein said engaging means includes means for effecting releasable engagement of said winding stem with said winding means when said winding stem is in said winding position.

8. A wrist watch according to claim 7; wherein said engaging means includes a clutch member mounted for axial movement along said winding stem and for rotational movement with said winding stem, a pivotally mounted clutch lever in engagement with said clutch member and operative in response to pivotal movement thereof to axially move said clutch member along said winding stem into .engagement with one of said winding means, transmitting means, and hand-setting means depending upon the extent of pivotal movement of said clutch lever, and a pivotally mounted setting lever coupled to said winding stem whereby axial movement of said winding stem effects pivotal move ment of said setting lever and having a camming projection engageable with said clutch lever to effect pivotal camming movement thereof in response to axial movement of said winding stem.

9. A wrist watch according to claim 8; including another pivotal lever having means therein defining a slot; and means mounting said transmitting means on said another lever for pivotal movement along said slot into one end limiting position wherein same engages with said day display means and another end limiting position wherein same engages with said date display means.

10. A wrist watch according to claim 9; wherein said transmitting means comprises a gear train including a rotatable input wheel rotatably mounted on said another lever; and wherein said setting lever has another camming projection in engagement with said another lever and operative in response to axial movement of said winding stem to said hand-setting position to pivot said another lever into a position wherein said input wheel engages with said hand-setting means whereby rotation of said winding stem acts through said input wheel to actuate said hand-setting means.

Claims

1. In a wrist watch: day display means automatically angularly displaceable during running of the watch for visibly displaying the day of the week; date display means automatically angularly displaceable during running of the watch for visibly displaying the date; a rotatable winding stem mounted for manual axial movement to a day-and-date changing position and a hand-setting position; movable transmitting means operative when engaged with said winding stem for alternatively moving into engagement with said day display means in response to angular displacement of said winding stem in one direction whereby further angular displacement of said winding stem in said one direction effects angular displacement of said day display means to accordingly change the day setting thereof and movable into engagement with said date display means in response to angular displacement of said winding stem in the other direction whereby further angular displacement of said winding stem in said other direction effects angular displacement of said date display means to accordingly change the date setting thereof; hand-setting means operative when engaged with said winding stem for effecting movement of the watch hands in response to angular displacement of said winding stem to accordingly set the watch hands at the desired time setting; engaging means for effecting releasable engagement of said winding stem with said transmitting means when said winding stem is in said day-and-date changing position and coacting with said transmitting means to effect releasable engagement of said winding stem with said hand-setting means when said winding stem is in said hand-setting position; and preventing means coacting with said transmitting means and said engaging means for preventing angular displacement of both said day display means and said date display means in response to angular displacement of said winding stem during the shifting of said winding stem from said day-and-date changing position to said hand-setting position and from said hand-setting position to said day-and-date changing position.

2. A wrist watch according to claim 1; wherein said engaging means includes a clutch member mounted for axial movement along said winding stem and for rotational movement with said winding stem, a pivotally mounted clutch lever in enGagement with said clutch member and operative in response to pivotal movement thereof to axially move said clutch member along said winding stem into engagement with either said transmitting means or said hand-setting means depending upon the extent of pivotal movement of said clutch lever, and a pivotally mounted setting lever coupled to said winding stem whereby axial movement of said winding stem effects pivotal movement of said setting lever and having a camming projection engageable with said clutch lever to effect pivotal camming movement thereof in response to axial movement of said winding stem.

3. A wrist watch according to claim 2; wherein said preventing means comprises means defining a recess in said clutch lever dimensioned to receive therein said camming projection in response to initial axial movement of said winding stem both from said day-and-date changing position toward said hand-setting position and from said hand-setting position toward said day-and-date changing position thereby permitting slight pivotal movement of said clutch lever relative to said setting lever, and biasing means biasing said clutch lever toward said setting lever and effecting slight pivotal movement of said clutch lever toward said setting lever a distance sufficient to disengage said clutch member from said transmitting means whenever said camming projection is received within said recess.

4. A wrist watch according to claim 2; wherein said transmitting means comprises a rotatable setting wheel having means thereon for engaging with said clutch member when said winding stem is in said day-and-date changing position, a pivotal swing lever, means frictionally engaging said swing lever with said setting wheel for effecting pivotal movement of said swing lever in response to angular displacement of said setting wheel and for permitting slippage between said swing lever and setting wheel, and a wheel assembly rotatably mounted on said swing lever for pivotal movement therewith and in constant engagement with said setting wheel and engageable with either said day display means or said date display means in response to and depending upon the direction of pivotal movement of said swing lever effected by rotation of said winding stem.

7. A wrist watch according to claim 1; including means mounting said winding stem for manual axial movement to a winding position in addition to said day-and-date changing position and said hand-setting position; winding means operative when engaged with said winding stem for effecting winding of the watch mainspring in response to rotation of said winding stem; and wherein said engaging means includes means for effecting releasable engagement of said winding stem with said winding means when said winding stem is in said winding position.

8. A wrist watch according to claim 7; wherein said engaging means includes a clutch member mounted for axial movement along said winding stem and for rotational movement with said winding stem, a pivotally mounted clutch lever in engagement with said clutch member and operative in response to pivotal movement thereof to axially move said clutch member along said winding stem into engagement with one of said winding means, transmitting means, and hand-setting means depending upon the extent of pivotal movement of said clutch lever, and a pivotally mounted setting lever coupled to said winding stem whereby axial movement of said winding stem effects pivoTal movement of said setting lever and having a camming projection engageable with said clutch lever to effect pivotal camming movement thereof in response to axial movement of said winding stem.