CH703258B1 - Shows universal time. - Google Patents

Abstract

The present invention relates to a timepiece with universal time display (1) comprising means for indicating the local time (2, 3.2, 3.3), means for indicating the time of the world time zones (5). and means for correcting the time and the time zone displayed, said local time indicating means comprising a ring of hours (2), said means for indicating the time of the world time zones comprising a ring of cities (5), and said correction means including a correction mechanism for adjusting the position of said local time indication means (2, 3.2, 3.3) and / or said time indicating means of the global time zones (5). Said ring of hours (2) and said ring of cities (5) are arranged in a concentric manner, the ring of hours (2) rotating, during the normal running of the timepiece, relative to the ring of cities (5) who is motionless during normal walking. Said correction means is arranged so that, during the correction of the displayed time zone, the means for indicating the local time (2, 3.2, 3.3) and the means for indicating the time of the global time zones (5 ) turn together in the same direction.

Description

Description

The present invention refers to a timepiece with universal time display comprising means for indicating the local time, means for indicating the time of the world time zones, and the means for correcting the time. the time and the time zone displayed, said local time indicating means comprising a ring of hours, said means for indicating the time of the world time zones comprising a ring of the cities and said correction means comprising a correction mechanism enabling adjusting the position of said local time indication means and / or time indication means of the global time zones.

These timepieces are known to the general public under the name "watches universal time" and are appreciated, especially since the second half of the last century, by people traveling frequently in other parts of the world or communicating often with people in another time zone. The simultaneous display of the local time of a given time zone and the time of the other world time zones being a demanding and complex task, it has inspired many watchmakers who have developed, since the invention of watches universal time, many variations of these watches. The introduction of the German patent DE 10 2007 01 1 889 offers, for example, an overview of many variants of watches universal time having been made in the past. In view of these many forms of execution of an already existing universal time watch, this document proposes a watch allowing the display of the local time, as well as the time of the other world time zones by using a clock hour display and conventional minutes for displaying the local time, as well as a time zone disk and hour record for displaying the time in the other time zones. In particular, the disk of the time zones can be arranged to indicate up to 39 time zones, in particular by including time zones offset by UTC (Universal Time Coordinated) by periods other than a multiple of hours of integers. During the normal running of this watch, the time zone disk rotates inside the hour disk, at the speed of one revolution per day, this in the counterclockwise direction so as to indicate on a variable position according to the progress of its rotation the time of a given time zone. The disadvantage of this arrangement is that the eye of the user of the watch must look for the given time zone for which the local time is displayed by the hour and minute hands on the disk of the time zones, whose position is variable. , which makes reading such a display less fast and less intuitive. The time zone change is made in this watch by moving the hour and minute hands while the time zone disc is stopped. For setting the time of the watch, the time zone disc can be rotated simultaneously with the hour and minute hands, but in the opposite direction of rotation relative to the direction of rotation of the latter. This has the additional disadvantage for the user that the correction operations are contrary to his intuition, thus possibly causing incorrect use of the device.

The object of the present invention is to provide a timepiece with universal time display tending to overcome the aforementioned drawbacks of known systems, and in particular to those of the watch described in more detail above, as well as to allow the realization of such a watch, whose reading of the display is faster and more intuitive, the correction of the time zone displayed and the time setting are also simpler and more intuitive for the user, and the technical design as well as its manufacture remain nevertheless rather uncomplicated, robust and inexpensive.

For this purpose, the invention is characterized by the features listed in claim 1, in particular by the fact that said ring of hours and said ring cities are arranged concentrically, the ring of hours rotating, when the normal running of the timepiece, with respect to the city ring which is stationary during normal walking, and in that said correction means is arranged so that, when the displayed timezone is corrected the means for indicating the local time and the means for indicating the time of the world time zones all turn in the same direction.

By these measures, the user of the watch always sees the local time and the name of the world time zone corresponding to a given position of the dial of the watch, preferably at the usual position of six hours. In addition, because the city ring, the hour ring, and the minute hand all turn in the same direction when correcting the displayed time zone, this correction becomes completely intuitive for the user.

Moreover, the ring of cities preferably indicates more than 24 world time zones, including at least one time zone offset by UTC by a period other than a multiple of whole hours, preferably 37 time zones. For this purpose, said city ring is attached to a cam cities having a number of notches on its inner periphery at least equal to the number of time zones indicated on the ring of cities and distributed relative to each other to an angular distance corresponding to time zones offset by UTC by a quarter-hour, half-hour, three-quarters of an hour or an entire hour depending on the arrangement of the ring of cities. This cam cities is housed so as to be, during the normal running of the timepiece, stopped in a given position and can, during the correction of the time zone displayed, turn in the same direction as the ring hours. Thus, a form of execution of a universal time watch which is robust, but whose technical design is still relatively simple, so as not to produce excessive production costs, while allowing to offer the advantages stated above.

The accompanying drawings illustrate schematically, and by way of example, an embodiment of the invention.

2 FIG. 1 shows a top view of a universal time watch according to the present invention.

Fig. 2 is a perspective view of the hour ring and its drive, the part of the ring of hours bearing its indications being removed.

Fig. 3 is a perspective view of the ring of the hours and the ring respectively of the cam of the cities, as well as a part of the wheel as seen through these parts, the parts of the ring of hours and of the ring of cities bearing their indications being suppressed on this view.

Fig. 4 represents a top view of the device illustrated in FIG. 3, some parts being transparently illustrated, to better show the mechanism.

The invention will now be described in detail with reference to the drawings mentioned above which illustrate by way of example an embodiment of the invention.

[0009] Referring to FIG. 1, it is easy to understand that the timepiece with universal time display 1 according to the present invention comprises means for indicating the local time 2, 3.1, 3.2, 3.3, 8, a means of indicating the time of the global time zones 5, as well as means for correcting the time and the time zone displayed. Said means for indicating the local time include in particular a disk hours 2 which is preferably in the form of a ring. Preferably, they also comprise a minute hand 3.2, arranged concentrically with respect to said hour ring 2, as well as possibly a 3.1 hour hand and / or a second hand 3.3 arranged concentrically with respect to said hour ring 2 and said minute hand 3.2. These needles 3.1, 3.2, 3.3 cooperate in a conventional manner with a scale 8 located on the dial of the watch, preferably concentrically around the ring of the hours 2, so as to indicate the hours, minutes and seconds of the local time a given world time zone. Said scale 8 moreover comprises, preferably at its six o'clock position, a mark 8.1 cooperating with the ring of hours 2, as well as with the means of indicating the time of the world time zones. The latter comprises a city disc 5 which is preferably in the form of a ring, as shown diagrammatically in FIG. 1, where cities each representing a given time zone are inscribed on the periphery of this ring 5. Other embodiments of such a ring cities are conceivable because many possibilities of arrangement of this ring of cities are open to the watchmaker. In particular, the ring of cities 5 may be integral with a world map 6, preferably fixed within said ring of cities 5 and graphically indicating the existing world time zones. Advantageously, this world map 6 can take the form of a projection of the world map with the North Pole, or even the South Pole in the center, as is widely known in the art. In addition, said correction means comprises a correction mechanism making it possible to adjust the position of said means for indicating the local time, that is to say the ring of the hours 2, of the hour hand 3.1, the minute hand 3.2 and the seconds hand 3.3, and / or said means for indicating the time of the world time zones, that is to say the ring of the cities 5, as will be described in more detail later.

In a universal time watch according to the present invention, the ring of the hours 2 and the ring of the cities 5 are arranged concentrically, and the ring of the hours 2 turns, during the normal running of the watch , compared to the ring of the cities 5 which remains stationary during this phase of operation of the watch. As can be seen for example from FIG. 1, the hour ring 2 has a separate ladder normally in 24 identical angular slices indicating the 24 hours of the day. The ring of the hours 2 performing, when arranged as indicated above, a rotation at the speed of one revolution per day, it thus displays, in cooperation with the mark 8.1 of the scale 8 mentioned above. above, the time of the local time of the chosen time zone, at the six o'clock position of the dial, while hands 3.1, 3.2 and 3.3 conventionally display the hours, minutes and seconds of the local time. Since the hour ring 2 thus indicates the time of the local time, the embodiment of a watch according to the present invention illustrated by way of example in FIG. 1 does not include an hour hand.

The embodiment illustrated in FIGS. 2, 3 and 4 further comprises a 3.1 hour hand to display the local time cooperating with the scale 8 in a completely usual manner. As is also apparent from FIG. 1, the ring of cities 5, with the world map 6 possibly becoming a disk of the time zones, also cooperates with the mark 8 of scale 8 so as to indicate at the six o'clock position of the dial the name, or even graphically on the world map, the position of the time zone whose local time is currently displayed by the local time indication means 2, 3.1, 3.2, 3.3. Obviously, the mark 8.1 could also be in another position, for example at the usual twelve o'clock position of the dial, so that the ring of hours 2 and the ring of cities 5 display the time , respectively the name of the time zone concerned at this position. In a preferred embodiment of the invention, as illustrated in FIG. 1, the ring of the hours 2 and the ring of the cities 5 are arranged in a concentric manner with respect to the dial of the timepiece 1, the ring of the hours 2 rotating, during the normal march of the piece of watchmaking, around the ring of cities 5 by indicating the time of the local time at the six o'clock position of said dial. Other variants are imaginable, for example an embodiment of a watch according to the present invention in which a ring or hour disc rotates inside the ring of towns during the normal running of the watch. .

The driving of the hours ring 2 will be explained in more detail with reference to FIG. 2, which shows a perspective view of this ring 2, its part bearing the indications of the hours being suppressed. Indeed, the ring of hours 2 has an internal toothing 2.1 meshing with a transmission train 10 which in turn meshes with the pavement 3.2.1 of the timepiece carrying the minute hand 3.2, visible in FIG. . 4. During the normal running of the timepiece according to the present invention, the pavement 3.2.1 carrying the minute hand 3.2 is driven conventionally by the movement of the watch in the clockwise direction. The road 3.2.1 meshes with the upper timer wheel 10.1 which in turn drives a first intermediate wheel 10.2 meshing in turn with a second intermediate wheel 10.3. The latter is engaged with a return wheel of the ring of hours 10.4 which is integral with said reference ring of hours 10.5. The reference 10.5 meshing with said internal toothing 2.1 of the hour ring 2, the latter is thus also driven clockwise with the hour hands 3.1, if present, minutes 3.2 and seconds 3.3, as is clear from of fig. 2. On the other hand, if the watch 1 is equipped with a 3.1 hour hand, the upper timer wheel 10.1 is secured to a 10.0 hour gear which meshes with an hour wheel 3.1.1 carrying said hour hand. 3.1, as schematically illustrated in FIG. 2.

In order to turn now to the more detailed description of said ring cities 5, it should be noted that it normally indicates in the context of the present invention more than 24 world time zones. We must know that besides the 24 time zones widely known and offset by a period of a multiple of one hour, there are other official time zones that are offset by UTC, the official time in Greenwich , by a period other than a whole number of hours, for example by a period of half an hour or fifteen minutes. As can be seen for example from FIG. 1, the city ring of a universal time watch according to the present invention includes one or more of these time zones offset from UTC by a period other than a whole number of hours. Preferably, the city ring 5 according to the present invention has inscriptions indicating the name of 37 time zones, or even indicates them graphically. Thus, the ring of cities 5 according to the present invention, respectively the disk of the time zones that it forms together with said world map 6, includes almost all the official time zones of the world. It is obvious that the names of the cities chosen for the city ring 5 illustrated in the attached figures may be chosen differently. Time zones can also be represented in another way, for example only graphically.

Parallel to this arrangement of the part of the cities ring 5 bearing the indications concerning the world time zones involves a technical design of the parts of said ring cities 5 cooperating with the wheel of a watch universal time according to the present invention, so as to allow, as already mentioned above, that, on the one hand, the ring of cities 5 remains stationary during the normal running of the watch, while, on the other hand, it can to be rotated when correcting the time zone whose local time is displayed on the dial. Indeed, said correction means is arranged so that, during the correction of the displayed time zone, the local time indication means 2, 3.1, 3.2, 3.3 and the means of indicating the time of the time zones. World 5, that is to say the ring of cities, all turn in the same direction.

In order to achieve this functional characteristic, the ring of cities 5 according to the present invention is integral with a city 5.1 cam as shown schematically and by way of example in FIGS. 3 and 4. FIG. 3 is a perspective view of the ring of cities 5 and the ring of hours 2 in which the parts of said rings 2, 5 bearing the inscriptions have been removed in order to reveal the parts of said rings cooperating with the workings of the timepiece 1 according to the present invention. Fig. 4 is a top view schematically illustrating in more detail the cooperation between said wheels and the ring of cities 5, or even the ring of hours 2. It appears from FIGS. 3 and 4 that said cam cities 5.1 has in particular a number of notches 5.1.1 on its inner periphery at least equal to the number of time zones indicated on the ring cities 5, as shown for example in FIG. 1. These notches 5.1.1 are distributed relative to each other at an angular distance corresponding to time zones offset by UTC by a period of fifteen minutes, one half hour, three quarters of hour, or an entire hour depending on the chosen arrangement of the city ring 5. The perspective view of FIG. 3 clearly shows that, in the preferred embodiment of the present invention, the cam of the cities 5.1 of the city ring 5 has notches 5.1.1 irregularly distributed on its inner periphery, furthermore so that that some of these notches 5.1.1 are at an angular distance from each other corresponding to an offset of one hour of the time zones concerned while other notches 5.1.1 are separated from each other an angular distance corresponding to a shift of a quarter of an hour or a half hour of the corresponding time zones. Alternatively, in a less preferred embodiment but facilitating manufacture, the cam of the cities 5.1 could include notches 5.1.1 distributed on its periphery, which moreover could be either the inner periphery or the outer periphery, at a distance angular corresponding to the smallest period between the time zones to be displayed, for example at a quarter-hour period.

The cam cities 5.1, and therefore the ring cities 5 which it is secured, is housed so as to be stopped in a given position, during the normal running of the timepiece 1, and to be able when correcting the time zone whose local time is to be displayed on the dial of the watch, turn in the same direction as the ring of the hours 2. For this purpose, the timepiece 1 comprises, as it appears of fig. 3 and FIG. 4, a latch 12.4 pivoted at one of its ends 12.4.1, whose free end 12.4.3 is held in abutment against the inner periphery of the cam cities 5.1 by a preload spring 12.5. During the normal running of timepiece 1, the

4 tip of the free end 12.4.3 of the latch 12.4 is in one of the notches 5.1.1 of the cam cities 5.1, thus positioning the ring cities 5 in its rest position, where the indication the time zone whose local time is to be displayed is (in particular, in the preferred embodiment illustrated in Fig. 1, at the 6 o'clock position of the dial).

In order to allow the aforementioned rotation of said ring of the cities 5 during the correction of the displayed time zone, the cities 5.1 cam of the ring of the cities 5 still has an internal gear 5.1.2 arranged on this cam at a second level relative to the notches 5.1.1 mentioned above, as is apparent, for example, from the perspective view of FIG. 3. This inner toothing 5.1.2 of the cam cities 5.1 meshes with a correction wheel of the time zone 1 1, as shown schematically in FIG. 4. This correction wheel of the time zone 1 1 comprises a first correction gear 1 1.1 which can be rotated from the winding by turning a crown 9 of the timepiece 1 in the counterclockwise direction when the crown 9 is located in a first drawn position, for example in an intermediate position. The latter may correspond to the correction position of the time zone whose local time is to be displayed on the dial. The first correction gear 1 1.1 then rotates a correction wheel 1 1.2 which carries a second correction pinion 1 1.3 meshing with said internal toothing 5.1.2 located at a second level of the cam cities 5.1. By turning the crown 9 of the timepiece 1 in the counterclockwise direction when it is in its first drawn position, the clockwise rotation of the cam of the cities 5.1 is then produced and thus a corresponding rotation of the ring cities 5 integral with this cam.

In addition, the correction wheel 11.2 is also integral with a third correction gear 1 1.4 which meshes with an intermediate correction wheel 12 which can be set, when the time zone is corrected to be displayed, in gear with the gear train 10 mentioned above, itself meshing with the pavement 3.2.1 of the timepiece 1 carrying the minute hand 3.2 and the hour ring 2. As is apparent from FIG. 4, the intermediate correction wheel 12 comprises in fact a first intermediate wheel 12.1 meshing with said third correction gear 11.4 of the time-correction wheel of the time zone 1 1. The first intermediate wheel 12.1 is secured to a second intermediate wheel 12.2 resulting in a third intermediate wheel 12.3 of said intermediate correction train 12. The first - 12.1, the second - 12.2, and the third 12.3 intermediate wheels may for example, and advantageously, be mounted on the respective ends of an intermediate branch 12.4.2 of said flip-flop 12.4. This rocker has in its preferred embodiment illustrated in the figures a shape substantially in L, with said intermediate branch 12.4.2 carrying the three wheels 12.1, 12.2, 12.3 arranged between the other two branches 12.4.1,

12.4.3. The outer end of the first leg 12.4.1 houses the pivot axis of the rocker, which is advantageously arranged coaxially with the axis of the second correction pinion 1 1.3. The free end 12.4.3 of the rocker is under the stress of said prestressing spring 12.5, visible for example in FIGS. 3 and 4, so as, on the one hand, to move the toothing of the third intermediate wheel 12.3 from the toothing of the upper timer wheel 10.1 of the transmission train 10 described above as well as, on the other hand, to keep the rocker resting against the inner periphery of the 5.1 city cam as mentioned above.

When the ring of the cities 5 is rotated clockwise by acting on the ring 9 in its first drawn position, as described above, the first intermediate wheel 12.1 then makes a rotation in the counterclockwise direction and causes via the second intermediate wheel 12.2 a rotation of the third intermediate wheel 12.3 in the clockwise direction. At the same time, the rotation of the ring of the towns causes, by lifting against the action of the prestressing spring 12.5 the free end 12.4.3 of the lever 12.4 outside its internal toothing 5.1.1, the coming together, that is to say, the gearing of this wheel 12.3 with said upper timer wheel 10.1 of the transmission train 10. In turn, the latter transmits this rotation, on the one hand, via the wheels 10.2, 10.3 and 10.4 as well that pinion 10.5 to the ring of hours 2 and, on the other hand, to the pavement 3.2.1 and thus to the minute hand 3.2. Therefore, during this phase of operation of a universal time watch according to the present invention, the transmission train 10 does not act as a drive train as described above in the context of the description of the invention. the normal running of the watch, but is functionally part of the correction wheel. Thus, during the correction of the time zone whose local time is to be displayed on the dial of the watch 1, the means for indicating the local time, that is to say the ring of the hours 2, the hand of the minutes 3.2, and possibly the hour hand 3.1 and the second hand

3.3, and the means of indicating the time of the world time zones, that is to say the ring of cities 5, all turn in the same direction when the user turns the ring 9 in its first drawn position. The direction of rotation of the various parts of the mechanism indicated above is the preferred embodiment of the invention but it is obvious that this direction of rotation can be reversed by adding a pinion or a wheel in each of the cogs mentioned ci -above. Similarly, it is obvious that the arrangement of the intermediate correction wheel 12 and in particular of the lever 12 can be modified by those skilled in the art without affecting the central idea of the present invention.

In view of the description of the structure of the mechanism according to the present invention presented above, its operation, especially during the phases of the correction of the time zone displayed and the correction of the local time, will be evident for the business man. Indeed, the correction mechanism is controlled by means of the ring 9 having a first pulled position and a second pulled position allowing, respectively, to adjust the position of said time indicating means of the world time zones simultaneously with the position of said local time indication means 2, 3.1, 3.2, 3.3, ie the position of said local time indication means 2, 3.1, 3.2, 3.3 only. In detail, in the first position drawn from said ring, which may be the intermediate position of this ring 9, the ring 9 acts on the first correction pinion 1.1, thus starting the correction mechanism.

5

Claims (14)

which acts by means of the correction gear of the time zone 1 1 on the cam of the cities 5.1 integral with the ring of the cities 5. In parallel, the third correction gear 1 1.4 meshes with the intermediate correction gear 12 and the rotation of the cam of the cities 5.1 causes the gearing of the time-correction wheel of the time zone 1 1 with the transmission train 10 which then meshes with the road 3.2.1 carrying the minute hand 3.2 as well as with the ring of hours 2, so as to make it possible to adjust the time zone as well as the local time displayed by the timepiece 1. Due to the non-uniform distribution of the notches 5.1.1 on the cam of the cities 5.1, reflecting the manner according to the world time zones are indicated on the part of the ring of cities 5 visible on the dial, this correction of the displayed timezone is done in steps of fifteen minutes, half an hour, three quarters of Hour, or an entire hour depending on the desired arrangement of the ring of the cities 5, respectively of its cities 5.1 cam. In this way, the user automatically and advantageously advances the ring of cities from one time zone to the next regardless of the actual time lag between them. In addition, all the indication means 2, 3.1, 3.2, 3.3, 5 rotate in the same direction, which greatly simplifies this operation for the user and corresponds to his intuition. In the second position drawn from the ring 9, normally corresponding to its fully drawn position, a rotation of the ring 9 directly produces, conventionally via the winder, a rotation of the roadway 3.2.1. The latter is engaged with the transmission train 10 described above and meshing, next to the pavement 3.2.1, also the ring of the hours 2, so that the correction mechanism acts thus on the means of indication of the local time 2, 3.1, 3.2, 3.3, while the means of indicating the time of the world time zones, the ring of the cities 5, remains in this case immobile. In this way, a rotation of the ring 9 in its second fired position makes it possible to adjust the local time displayed by the timepiece 1. It remains to mention that the ring of hours 2 preferably comprises a day / night display. For example, as schematically illustrated and by way of example in FIG. 1, a day and night indication disc 7 can be attached to the hour ring 2, so as to indicate the areas of the globe illuminated by the sun and those in the shadow. Such a disc comprises, as is known to those skilled in the art, in particular a first semicircular and transparent half and a second semicircular and semi-transparent half, shaded, or non-transparent, corresponding in terms of its surface approximately half of the world map 6. Because this day and night indication disc 7 rotates together with the hour ring 2 during the normal running of the timepiece 1, while the ring of cities 5 remains stationary during this phase of operation of the watch, the wearer of the watch ideally perceives the parts of the world lying in the sun either during the night. In view of the above description of the invention, it is clear that a universal time watch according to the present invention provides a display of the local time and the corresponding time zone more readable and clearer than the devices of the prior art, since these two indications are preferably at the six o'clock position of the dial of the watch. In addition, the correction of the time zone whose local time is to be displayed is greatly facilitated by the fact that all the indication elements turn in the same direction during this correction phase, thus making this operation more comprehensible and more intuitive for the user. Moreover, these advantages are obtained while using a robust and relatively simple construction which keeps the manufacturing and service costs relatively low. Finally, the timepiece according to the present invention allows a display of almost all official time zones, even time zones offset by UTC by a different period of a whole hour. claims 1. Timepiece with universal time display (1) having means for indicating the local time (2, 3.1, 3.2, 3.3, 8), means for indicating the time of the world time zones (5). ), as well as time and time correction means displayed, said local time indication means including a hours disk (2), said time indicating means of the world time zones including a disk cities (5), and said correction means including a correction mechanism for adjusting the position of said local time indicating means (2, 3.1, 3.2, 3.3, 8) and / or said means of indicating the time of the world time zones (5), characterized in that said hours disk (2) and said city disc (5) are arranged concentrically, the hour disc (2) rotating, during the normal running of the timepiece, relating to the disc of the cities (5) which is immobile penda the normal operation, and in that said correction means is arranged so that, during the correction of the displayed time zone, the means for indicating the local time (2, 3.1, 3.2, 3.3, 8) and the time indicating means of the global time zones (5) all turn in the same direction. 2. Timepiece according to the preceding claim, characterized in that said means for indicating the local time comprise a minute hand (3.2) arranged concentrically with respect to said hour disk (2). 3. Timepiece according to the preceding claim, characterized in that said means for indicating the local time comprise an hour hand (3.1) and / or a second hand (3.3) arranged concentrically with respect to said hour disk. (2) and said minute hand (3.2). 4. Timepiece according to one of the preceding claims, characterized in that said disk hours (2) and said disk cities (5) are rings arranged concentrically with respect to the dial of the 6 timepiece (1), the ring of hours (2) rotating, during the normal running of the timepiece, around the ring of cities (5) indicating the time of local time to the usual 6 o'clock position of the dial. 5. Timepiece according to one of the preceding claims, characterized in that the hour disc (2) is a ring and has an internal toothing (2.1) meshing with a gear train (10) meshing itself with the pavement (3.2.1) of the timepiece carrying the minute hand (3.2). 6. Timepiece according to one of the preceding claims, characterized in that the city disc (5) indicates more than 24 world time zones including at least one time zone offset from UTC by a period other than number of whole hours, preferably 37 time zones. 7. Timepiece according to the preceding claim, characterized in that said disc cities (5) is a ring secured to a cam cities (5.1) having a number of notches (5.1.1) on its periphery internal at least equal to the number of time zones indicated on the ring of cities (5) and distributed relative to each other at an angular distance corresponding to time zones offset by UTC by a period of fifteen minutes , half an hour, three quarters of an hour or an entire hour depending on the arrangement of the ring of cities (5), said city cam (5.1) being housed so as to be stopped in a given position, during the normal running of the timepiece (1), and to be able to turn in the same direction as the hours disk (2), during the correction of the displayed time zone. 8. Timepiece according to the preceding claim, characterized in that said city cam (5.1) has an internal toothing (5.1.2) meshing with a time zone correction gear (11) which is in gear with a intermediate correction train (12) which can be set, when the displayed time zone is corrected, in gear with a transmission train (10) meshing itself with the road (3.2.1) of the timepiece carrying the minute hand (3.2) as well as with the hour disc (2). 9. Timepiece according to one of the preceding claims, characterized in that said correction mechanism is controlled by means of a ring (9) having a first and a second drawn position for adjusting the position said global time zone time indication means (5) and said local time indication means (2, 3.1, 3.2, 3.3) respectively the position of said local time indication means (2, 3.1, 3.2); , 3.3). 10. Timepiece according to the preceding claim, characterized in that, in the first position drawn from said ring (9), said correction mechanism acts via the time zone correction gear (11) on the city cam (5.1) integral with the disk of the cities (5) in order to turn them, the rotation of the cam of the cities (5.1) causing the gearing of the intermediate correction wheel (12) with the transmission gear (10) meshing itself with the pavement (3.2.1) of the timepiece carrying the minute hand (3.2) and with the hour disc (2), so as to allow the time zone to be adjusted as well as the local time displayed by the timepiece (1), in steps of fifteen minutes, half an hour, three quarters of an hour or one hour depending on the time arrangement of the ring of the cities (5) respectively of its city cam (5.1). Timepiece according to claim 9 or 10, characterized in that, in the second position drawn from said ring (9), said correction mechanism acts via the transmission train (10) meshing with the pavement (3.2.1) of the timepiece carrying the minute hand (3.2) and with the hour ring (2) on these means for indicating the local time (2, 3.1, 3.2, 3.3 ), while the time indication means of the global time zones (5) remains stationary, so as to adjust the local time displayed by the timepiece (1). 12. Timepiece according to one of the preceding claims, characterized in that a map of the world (6) is attached to or on the disc cities (5), preferably within said disc Cities (5), so as to graphically indicate the world time zones. 13. Timepiece according to one of the preceding claims, characterized in that a day-night display is attached to the hours disk (2), so as to indicate the areas of the globe illuminated by the sun and those in the The shadow. 14. Timepiece according to one of the preceding claims, characterized in that it is made in the form of a watch at universal times. 7