WO2017012949A1

WO2017012949A1 - Method for indicating a time and watch for conducting said method

Info

Publication number: WO2017012949A1
Application number: PCT/EP2016/066638
Authority: WO
Inventors: Arnaud Duval
Original assignee: Sevenfriday AG
Priority date: 2015-07-17
Filing date: 2016-07-13
Publication date: 2017-01-26

Abstract

The invention relates to a method for indicating a time using at least one moving part (24b) and a related fixed scale (24a), whereby said at least one moving part (24b) moves relative to said related fixed scale ( 24a), and whereby said indicated time results from the actual position of said at least one moving part (24b) relative to said related fixed scale (24a). More freedom for the arrangement of different time indicating means on a time piece or watch is achieved by making said indicated time the sum of a base time, which is determined by the actual position of said moving part (24b) alone, and an additional time, which is determined by the position of said moving part (24b) in relation to said related fixed scale (24a).

Description

METHOD FOR INDICATING A TIME AND WATCH FOR CONDUCTING SAID METHOD

BACKGROUND OF THE INVENTION

The present invention relates to time-pieces. It refers to a method for indicating a time according to the preamble of claim 1 . It further refers to a watch for conducting said method.

PRIOR ART Analog time pieces usually use hour, minute and perhaps second hands, which rotate about a respective axis and indicate the time on a respective circular, linear time scale, which concentrically surrounds the axis.

In the past proposals have been made to replace on or all of the hands by rotating disks, some of these proposals are explained below. Document US2202581 discloses in combination with a clock having hour, minute and second time computing shafts; a time indicating mechanism, comprising, a time dial having outer and inner time zones each provided with time denoting indicia, an hour indicating disk fixed to said hour computing shaft and provided with a transparent portion overlying said inner zone and an opaque portion having a transparent section and overlying said outer zone, a transparent minute indicating disk fixed to said minute computing shaft and overlying said inner zone, and a transparent second indicating disk fixed to said second compu ting shaft and overlying said inner zone, each of said disks having indicia coasting with said time denoting indicia and said section for indicating time on said dial in hours, minutes and seconds.

Document US4945522 discloses a time indicator for a clock or watch that has a watch plate and at least two time-indicating elements that are at least partially superimposed over one another and are driven by centrally and coaxially disposed drive elements. The time-indicating elements are formed by disks or dials that are of the same or different sizes, rotate about centrally disposed shafts, and are disposed in different planes. To indicate time, the dials are provided with openings, indicators, or colors that cover or opti- cally suppress all other information that at any given time is not necessary for reading off that time.

Document US5751663 discloses a timepiece that uses disks having sharp zones of contrast of visual design density to indicate time intervals when the sharp zone of contrast is aligned with time interval indicator markings or traditional time indicator positions on a non-rotatable frame. The disks of the chronograph are continuously graduated in visual design density from an area of greatest density to an area of least density to form a sharp zone or line of contrast. The disks are located so that when the sharp zone or line of contrast is aligned with the time indicator markings or positions on the frame, thus displaying the time in an accurate fashion that is easily and quickly discernable even for individuals that are poor sighted. In addition, the timepiece presents such a strikingly novel design that it makes an aesthetic statement that is desirable for use by individuals with no sight problems.

H owever, all proposals made so far combine rotating disks with fully circular scales that substantially limit the flexibility in arranging the various time indicating means in a time piece. Especially for wrist watches there is a desire to replace the fully circular scales of the time indicating means so that new and useful arrangements of the hour, minute and second indicating means are possible.

SUMMARY OF THE INVENTION It is therefore an object of the invention, to teach a method for indicating a time, which at least partially waives the use of fully circular time scales in order to achieve more freedom for the arrangement of the different time indicating means on a time piece or watch.

It is another object of the invention to provide a watch for conducting said method.

A method according to the invention for indicating a time uses at least one moving part and a related fixed scale, whereby said at least one moving part moves relative to said related fixed scale, and whereby said indicated time results from the actual position of said at least one moving part relative to said related fixed scale. The indicated time is the sum of a base time, which is determined by the actual position of said moving part alone, and an additional time, which is determined by the position of said moving part in rela- tion to said related fixed scale.

According to an embodiment of the invention said moving part is a rotating element, said fixed scale comprises a section of a ring concentrically surrounding said element, and a plurality of indicator marks are provided on said rotating element for determining said additional time on said related fixed scale. A rotating element normally rotates with a constant velocity of rotation, that said indicator marks are equally distributed on the circumference of said rotating element, and that said related fixed scale is a linear scale. In a preferred embodiment said element rotates with a rotation velocity of one rotation per Ί 2 hours. The rotating element normally comprises n+ 1 (n= 1 , 2, 3 ) indicator marks, said fixed scale extends over an angle of the arc of 360°/(n+ 1 ), and said fixed scale is subdivided into at least 1 2/(n+ 1 ) equal arc sections. Preferably, n=2. Alternatively or in addition a element rotates with a velocity of rotation of one rotation per minute. Specifically, in this case, said rotating element comprises n+ 1 (n= 1 , 2, 3 ) indicator marks equally distributed around the circumference of said rotating element, said fixed scale extends over an angle of the arc of 360°/(n+ 1 ), and said fixed scale is subdivided into at least 60/(n+ 1 ) equal arc sections. Preferably, n=2 in this case. In an embodiment, two rotating elements with two respective related fixed scales are provided, whereby the first of said two rotating elements rotates with a rotation velocity of one rotation per 1 2 hours, the second of said two rotating elements rotates with a rotation velocity of one rotation per minute, the first of said rotating elements comprises three indicator marks, said fixed scale related to said first of said rotating elements ex- tends over an angle of the arc of 1 20°, said fixed scale related to said first of said rotating elements is subdivided into at least four equal arc sections, the second of said rotating elements comprises three indicator marks, said fixed scale related to said second of said rotating elements extends over an angle of the arc of 1 20°, and said fixed scale related to said second of said rotating elements is subdivided into twenty equal arc sections. The at least four arc sections of said fixed scale related to said first of said rotating elements are each subdivided into four equal sections to indicate quarters of an hour.

An additional minute hand with a related minute scale may be provided, whereby said minute hand rotates with a velocity of rotation of one rotation per hour around a central axis, and whereby said related minute scale extends over a full circle concentric to said central axis.

An additional day/night indicator may be provided, which divides a day into two equal parts and indicates, which part of the day is the actual part. If appropriate, said day/night indicator comprises a rotating circular indicator disk with a day-time sector of a first colour and a night-time sector of a second colour, which indicator disk rotates with a velocity of rotation of one rotation per 24 hours, and that a fixed indicator mark is provided at the outer circumference of said indicator disk to indicate, which of said two sectors is the actual sector. A watch according to the invention normally comprises a watchcase enclosing a movement with a central axis for driving a plurality of different time indication means, which time indication means are visible from the outside through a watch glass that closes said watchcase on its upper side, whereby said plurality of different time indication means comprises at least a first time indication means for indicating the hours of a day, and a second time indication means for indicating the minutes of an hour, whereby said first time indicating means comprises a moving part, which moves relative to a related fixed scale. The moving part preferably is a rotating element, which is driven by said movement with a constant velocity of rotation of one rotation per 1 2 hours, that said related fixed scale comprises a section of a ring concentrically surrounding said element, that a plural- ity of n+ 1 (n= 1 , 2, 3, 5) indicator marks for co-operating with said related fixed scale are equally distributed on the circumference of said rotating element, that said related fixed scale is a linear scale, that said fixed scale extends over an angle of the arc of 360γ(η+ 1 ), and that said fixed scale is subdivided into at least 1 2/(n+ 1 ) equal arc sections. Specifically, n=2. The second time indication means may comprise a minute hand and a related minute scale, whereby said minute hand rotates with a velocity of rotation of one rotation per hour around said central axis, and whereby said related minute scale extends over a full circle concentric to said central axis.

If appropriate a third time indication means is provided for indicating the seconds of a minute, whereby said third time indicating means comprises a moving part, which moves relative to a related fixed scale, said moving part being a rotating element, which is driven by said movement with a constant velocity of rotation of one rotation per minute, that said related fixed scale comprises a section of a ring concentrically surrounding said element, that a plurality of n+ 1 (n= 1 , 2, 3, 5) indicator marks for co-operating with said related fixed scale are equally distributed on the circumference of said rotating element, that said related fixed scale is a linear scale, that said fixed scale extends over an angle of the arc of 360°/(n+ 1 ), and that said fixed scale is subdivided into at least 60/(n+1 ) equal arc sections. In this case, again n=2 is preferred.

Furthermore an additional day/night indicator may be provided, which divides a day into two equal parts and indicates, which part of the day is the actual part. The day/night indicator may comprise a rotating circular indicator disk with a day-time sector of a first colour and a night-time sector of a second colour, which indicator disk rotates with a velocity of rotation of one rotation per 24 hours, and that a fixed indicator mark is provided at the outer circumference of said indicator disk to indicate, which of said two sectors is the actual sector. Specifically, said watch is a wrist watch.

It is to be understood that both the foregoing general description and the following detailed description present embodiments, and are intended to provide an overview or framework for understanding the nature and character of the disclosure. The accompa- nying drawings are included to provide a further understanding, and are incorporated into and constitute a part of this specification. The drawings illustrate various embodiments, and together with the description serve to explain the principles and operation of the concepts disclosed. BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows in an exploded view a general configuration of a wrist watch for implementing the present invention;

Fig. 2 shows the various time indicating means according to an embodiment of the invention in a wrist watch as shown in Fig. 1 ; Fig. 3 shows details of the hour indicating means according to an embodiment of the invention;

Fig. 4 shows details of the minute indicating means according to an embodiment of the invention;

Fig. 5 shows details of the second indicating means according to an embodiment of the invention;

Fig. 6 shows details of the day/night indicating means according to an embodiment of the invention; shows different positions of the day/night indicating means according to Fig. 6; and Fig. 8 shows the positions of the various time indicating means according to Fig. 2 for a specified a.m. time (Fig. 8(a)) and a specified p.m. time ( Fig. 8(b)) .

DETAILED DESCRIPTION OF DIFFERENT EMBODIMENTS OF THE INVENTION

Although the present invention may be applied to time pieces other than wrist watches, it is preferably used in wrist watches.

An example of a suitable wrist watch is shown in Fig. 1 in an exploded view.

The wrist watch 10 of Fig. 1 comprises a (standardized) movement 1 7 , such as♦, which is enclosed by a watchcase 19. On its lower side, watchcase 19 is closed by a (flat) bottom 22 , which is fixed to watchcase 19 using a first sealing 21 and four fastening screws 29. A watchband (not shown in Fig. 1 ) may be fastened to watchcase 19 with respective mounting pins 1 8. A crown 20, which is mechanically connected to the movement 1 7 , is provided for adjusting the positions of the various time indicating means. On its upper side, the watchcase 19 is closed by a frame 1 3 that is fastened to the watchcase 19 using a second sealing 14, and a watch glass 1 1 , which is fastened to the frame 1 3 using a third sealing 1 2. Between the movement 1 7 and the watch glass 1 1 there is an arrangement of a ring 1 6 and a driving mechanism 1 5 , which is used to drive a day/night indicator (23 in Fig. 2; Fig. 6). It should be noted that the watch case can have a different embodiment.

Fig. 2 shows an embodiment of various time indicating means on clock face 1 0a accord- ing to an embodiment of the invention being incorporated in a wrist watch as shown in Fig. 1. These time indicating means comprise a (central) hour indicator 24, a (central) minute hand 25 with a corresponding fully circular and concentric minute scale 26, an off-centre seconds indicator 27 , and an off-centre day/night indicator 23. Hour indicator 24 and minute hand 25 are driven by the movement 1 7 through a central axis 28.

The arrangement and function of the hour indicator 24 are shown in detail in Fig. 3. Hour indicator 24 comprises a (central) hour disk 24b, which rotates with a constant velocity of rotation of one rotation per twelve hours in clockwise direction (see arrow in Fig. 3). A corresponding fixed scale 24a comprises a 1 20° section of a ring concentrically surrounding hour disk 24b. Three indicator marks 24c are equally distributed at the circumference of hour disk 24b in steps of 1 20°. Indicator marks 24c have the form of a "+"-sign and are capable of being differentiated by assigned numbers "0", "4" and "8". Thus, there is a "0"-indicator, a "4"-indicator and an "8" indicator 24c.

Corresponding fixed scale 24a is equally divided into 4 (one hour) sections 0- 1 , 1 -2, 2-3 and 3-4. Each of these one-hour sections is subdivided into four equal subsections, whereby each of said subsections represents a quarter of an hour. The half-hour positions are marked with number "30". With this configuration the actual hour-time is a combina- tion of a first time given by the general position of the central hour disk 24b, and a second time given by the specific position of the hour disk 24b relative to hour scale 24a. When for example hour disk 24b is in the position shown in Fig. 3, the first time is four hours, as long as the "4"-indicator remains in the 1 20"-section of the hour scale 24a. When the "4"-indicator leaves this sector, the subsequent "8"-indicator at the same time enters the sector and the first time switches from four hours to 8 hours, and so on.

The second time is determined by the exact position of "+"-sign of the "0"-, "4"- or "8"- indicator with respect to hour scale 24a. In the example shown in Fig. 3, the second time is one hour and a quarter of an hour, so that the hour time indicated in Fig. 3 is five hours and 1 5 minutes or 5 : 1 5. In the embodiment shown in Fig. 2 and Fig. 3, the hour indicator 24 comprises an hour disk 24b with three indicator marks 24c, while the hour scale 24a has four sections 0-4. This is one of a plurality of possible arrangements. Another possible arrangement would be to use an hour disk with four indicator marks (0, 3 , 6, 9) and a 90° hour scale with 5 three sections 0-3. In general, it is reasonable that hour disk 24b may comprise n+ 1 (n= 1 , 2 , 3 , 5) indicator marks 24c, while hour scale 24a extends over an angle of the arc of 360°/(n+ 1 ), and is subdivided into at least 1 2/(n + 1 ) equal arc sections. Although n=4 would be another option, the resulting scales were not easily readable.

The indicating means of Fig. 3 comprise a seconds indicator 27 that works according to i o the same principles, for indicating the seconds of time. Seconds indicator 27 comprises a (central) seconds disk 27b (see Fig. 5), which rotates with a constant velocity of rotation of one rotation per minute in clockwise direction (see arrow in Fig. 5) . A corresponding fixed seconds scale 27a comprises a 1 20° section of a ring concentrically surrounding seconds disk 27b. Three indicator marks 27c are equally distributed at the circumference 15 of seconds disk 27b in steps of 1 20°. Indicator marks 27c have the form of a radial fingers and are capable of being differentiated by assigned numbers "00", "+20" and "+40". Thus, there is a "0"-indicator, a "20"-indicator and an "40" indicator 27c.

Corresponding fixed seconds scale 27a is equally divided into 20 (one second) sections 0-20. With this configuration the actual second-time is a combination of a first time given

20 by the general position of the central seconds disk 27b, and a second time given by the specific position of the seconds disk 27b relative to seconds scale 27a. When for example seconds disk 27b is in the position shown in Fig. 5, the first time is zero seconds, as long as the "00"-indicator remains in the 1 20°-section of seconds scale 27a. When the "00"- indicator leaves this sector, the subsequent "+20"-indicator at the same time enters the

25 sector and the first time switches from zero seconds to 20 seconds, and so on. The second time is determined by the exact position of seconds indicator 27c with respect to seconds scale 27a. In the example shown in Fig. 5, the second time is 16 seconds, so that the overall second time indicated in Fig. 5 is 0+ 1 6= 1 6 seconds.

In the embodiment shown in Fig. 5, the seconds indicator 27 comprises a seconds disk 27b with three indicator marks 27c, while the corresponding seconds scale 27a has twenty sections 0-20. This is one of a plurality of possible arrangements. Another possible arrangement would be to use a seconds disk with four indicator marks ( 0, + 1 5, +30, +45 ) and a 90° seconds scale with fifteen sections 0- 1 5. In general, it is reasonable that seconds disk 27b may comprise n+ 1 (n= 1 , 2, 3, 5 ) indicator marks 27c, while seconds scale 27a extends over an angle of the arc of 360°/(n+ 1 ), and is subdivided into at least 60/(n+ 1 ) equal arc sections. Although n=4 would be another option, the resulting scales were not easily readable.

As has been said already, the minutes are indicated by a(central) minute hand 25 , which moves with constant velocity of one rotation per hour along a fully circular and linear minute scale 26. The resulting clock face is shown in Fig. 4.

Fig. 3 makes clear that the hour indication of wrist watch 1 0 comprises a 1 2 -hour cycle only. In order to indicate, whether the indicated hour time is a.m. or p.m., an additional off-centre day/night indicator 23 is provided. As Fig. 6 shows in detail, day/night indicator 23 comprises an indicator disk 23b, which rotates with a constant velocity of one ro- tation per 24 hours. One half of indicator disk 23b is provided with a first colour (black in the example shown), while the other half is provided with a second, different colour (white in the example shown). Through a circular opening 23e a near-edge sector of rotating indicator disk 23d can be seen so that the transition between the white half and the black half, which takes place every 1 2 hours (or half day) is clearly visible from out- side. A fixed indicator point 23a arranged in circular opening 23e helps to visually fix the transition.

It is clear that the movements of indicator disk 23d and hour disk 24b are synchronized such that for example the transition between black to white sector takes place when hour indicator 24 indicates a time of 6 o'clock. Fig. 7(a)-(d) shows various position of day/night indicator 23 , wherein Fig. 7(a) relates to a time around 1 7:00, Fig. 7(b) relates to a time around 1 9:00, Fig. 7(c) could be between around 22 :00 and 2:00, Fig. 7(d) relates to a time around 5 :00, and Fig. 7(e) relates to a time between around 1 0:00 and 1 4:00. Finally, Fig. 8 shows two examples of indicates times, whereby Fig. 8(a) relates to an a.m. time of 5 :32:26 , while Fig. 8(b) relates to a p.m. time of 1 3: 1 5: 1 3.

LIST OF REFERENCE NUMERALS

10 wrist watch

10a clock face

11 watch glass

12,14,21 sealing

13 frame

15 driving mechanism (day/night indicator)

16 ring

17 movement

18 mounting pin (watchband)

19 watchcase

20 crown

21 sealing

22 bottom

23 day/night indicator

23a indicator point (fixed)

23b indicator disk

23c day-time sector (e.g. white)

23d night-time sector (e.g. black)

23e circular opening

24 hour indicator

24a hour scale (fixed)

24b hour disk

24c indicator mark 25 minute hand 26 minute scale 27 seconds indicator 27a seconds scale 27b seconds disk 27c indicator mark 28 central axis 29 Screw

Claims

ethod for indicating time using at least one moving part ( 24b; 27b) and a related fixed scale ( 24a; 27a), whereby a. said at least one moving part ( 24b; 27b) moves relative to said related fixed scale (24a; 27a), and whereby b. said indicated time results from the actual position of said at least one moving part (24b; 27b) relative to said related fixed scale ( 24a; 27a), characterized in that c. said indicated time is the sum of a base time, which is determined by the actual position of said moving part (24b; 27b) alone, and an additional time, which is determined by the position of said moving part ( 24b; 27b) in relation to said related fixed scale (24a; 27a). ethod as claimed in Claim 1 , characterized in that said moving part (24b; 27b) is a rotating element, that said fixed scale ( 24a; 27a) comprises a section of a ring concentrically surrounding said element, and that a plurality of indicator marks ( 24c, 27c) are provided on said rotating element (24b; 27b) for determining said additional time on said related fixed scale (24a; 27a).

Method as claimed in Claim 2, characterized in that said rotating element (24b; 27b) rotates with a constant velocity of rotation, that said indicator marks ( 24c, 27c) are equally distributed on the circumference of said rotating element ( 24b; 27b), and that said related fixed scale ( 24a; 27a) is a linear scale.

4. Method as claimed in Claim 3, characterized in that said element ( 24b; 27b) rotates with a rotation velocity of one rotation per 1 2 hours. 5. Method as claimed in Claim 4, characterized in that said rotating element (24b) comprises n+ 1 (n= 1 , 2, 3,

5) indicator marks ( 24c), that said fixed scale (24a) extends over an angle of the arc of 360°/(n+ 1 ), and that said fixed scale ( 24a) is subdivided into at least 1 2/(n+ 1 ) equal arc sections.

6. Method as claimed in Claim 4, characterized in that n=2.

7. Method as claimed in Claim 3, characterized in that said element (27b) rotates with a velocity of rotation of one rotation per minute.

8. Method as claimed in Claim 7, characterized in that said rotating element (27b) comprises n+ 1 (n= 1 , 2, 3, 5 ) indicator marks ( 27c) equally distributed around the circumference of said rotating element ( 27b), that said fixed scale (27a) extends over an angle of the arc of 360°/(n+ 1 ), and that said fixed scale (27a) is subdivided into at least 60/(n+ 1 ) equal arc sections.

9. Method as claimed in Claim 8, characterized in that n=2.

10. Method as claimed in Claim 3, characterized in that two rotating elements ( 24b;

27b) with two respective related fixed scales ( 24a; 27a) are provided, that the first (24b) of said two rotating elements (24b; 27b) rotates with a rotation velocity of one rotation per 1 2 hours, that the second ( 27b) of said two rotating elements ( 24b; 27b) rotates with a rotation velocity of one rotation per minute, that the first ( 24b) of said rotating elements ( 24b, 27b) comprises three indicator marks ( 24c), that said fixed scale ( 24a) related to said first ( 24b) of said rotating elements ( 24b, 27b) extends over an angle of the arc of 1 20°, that said fixed scale (24a) related to said first ( 24b) of said rotating elements ( 24b, 27b) is subdivided into at least four equal arc sections, that the second ( 27b) of said rotating elements ( 24b, 27b) comprises three indicator marks (27c), that said fixed scale ( 27a) related to said second ( 27b) of said rotating elements (24b, 27b) extends over an angle of the arc of 1 20°, and that said fixed scale ( 27a) related to said second (27b) of said rotating elements (24b, 27b) is subdivided into twenty equal arc sections.

Method as claimed in Claim 1 0, characterized in that said at least four arc sections of said fixed scale ( 24a) related to said first (24b) of said rotating elements ( 24b, 27b) are each subdivided into four equal sections to indicate quarters of an hour.

Method as claimed in Claim 10, characterized in that an additional minute hand ( 25) with a related minute scale ( 26) is provided, whereby said minute hand ( 25 ) rotates with a velocity of rotation of one rotation per hour around a central axis (28) , and whereby said related minute scale ( 26) extends over a full circle concentric to said central axis.

13. Method as claimed in one of the Claims 10 to 1 2, characterized in that an additional day/night indicator ( 23 ) is provided, which divides a day into two equal parts and indicates, which part of the day is the actual part.

Method as claimed in Claim 13, characterized in that said day/night indicator (23) comprises a rotating circular indicator disk (23b) with a day-time sector (23c) of a first colour and a night-time sector (23d) of a second colour, which indicator disk rotates with a velocity of rotation of one rotation per 24 hours, and that a fixed indicator mark (23a) is provided at the outer circumference of said indicator disk (23b) to indicate, which of said two sectors (23c, 23d) is the actual sector.

Watch (10) for conducting the method according to one of the Claims 1 to 14, comprising a watchcase (19) enclosing a movement (17) with a central axis (28) for driving a plurality of different time indication means (23, 24, 25, 27), which time indication means (23, 24, 25, 27) are visible form the outside through a watch glass (11) that closes said watchcase (1 ) on its upper side, whereby said plurality of different time indication means (23, 24, 25, 27) comprises at least a first time indication means (24, 24a-c) for indicating the hours of a day, and a second time indication means (25, 26) for indicating the minutes of an hour, whereby said first time indicating means (24, 24a-c) comprises a moving part (24b), which moves relative to a related fixed scale (24a), characterized in that said moving part ( 24b) is a rotating element, which is driven by said movement (17) with a constant velocity of rotation of one rotation per 12 hours, that said related fixed scale (24a) comprises a section of a ring concentrically surrounding said element (24b), that a plurality of n+1 (n=1 , 2, 3,....) indicator marks (24c) for co-operating with said related fixed scale (24a) are equally distributed on the circumference of said rotating element (24b), that said related fixed scale (24a) is a linear scale, that said fixed scale (24a) extends over an angle of the arc of 360°/(n+1 ), and that said fixed scale (24a) is subdivided into at least 12/(n+l ) equal arc sections.

16. Watch as claimed in Claim 15, characterized in that n=2.

17. Watch as claimed in Claim 1 5 , characterized in that said second time indication means (25, 26 ) comprises a minute hand ( 25 ) and a related minute scale ( 26), whereby said minute hand ( 25) rotates with a velocity of rotation of one rotation per hour around said central axis ( 28), and whereby said related minute scale ( 26) extends over a full circle concentric to said central axis (28).

18. Watch as claimed in Claim 1 5 , characterized in that a third time indication means ( 27, 27a-c) is provided for indicating the seconds of a minute, whereby said third time indicating means ( 27, 27a-c) comprises a moving part (27b), which moves relative to a related fixed scale ( 27a), said moving part ( 27b) being a rotating ele- ment, which is driven by said movement ( 1 7) with a constant velocity of rotation of one rotation per minute, that said related fixed scale ( 27a) comprises a section of a ring concentrically surrounding said element ( 27b), that a plurality of n+ 1 (n= 1 , 2, 3,.... ) indicator marks (27c) for co-operating with said related fixed scale (27a) are equally distributed on the circumference of said rotating element ( 27b), that said related fixed scale ( 27a) is a linear scale, that said fixed scale ( 27a) extends over an angle of the arc of 360°/(n+ 1 ) , and that said fixed scale ( 27a) is subdivided into at least 1 2/(n+ 1 ) equal arc sections.

19. Watch as claimed in Claim 1 8, characterized in that n= 2.

20. Watch as claimed in Claim 1 5 , characterized in that an additional day/night indi- cator ( 23 ) is provided, which divides a day into two equal parts and indicates, which part of the day is the actual part.

21. Watch as claimed in Claim 20, characterized in that said day/night indicator (23 ) comprises a rotating circular indicator disk ( 23b) with a day-time sector ( 23c) of a first colour and a night-time sector ( 23d) of a second colour, which indicator disk rotates with a velocity of rotation of one rotation per 24 hours, and that a fixed indicator mark ( 23a) is provided at the outer circumference of said indicator disk ( 23b) to indicate, which of said two sectors ( 23c, 23d) is the actual sector.

Watch as claimed in Claim 1 5 , characterized in that said watch ( 1 0) is a wrist watch.