JPS62263491A - Timepiece with age-of-moon/sidereal time display - Google Patents

Abstract

PURPOSE:To obtain a clock with age-of-moon/sidereal time display having a good matching property, by displaying a constellation range in addition to an age-of-moon display part and providing a slip function part to an intermediation wheel. CONSTITUTION:A sidereal time and constellation display function part equipped with a sedereal wheel 38 making one revolution per one sidereal day in synchronous relation to a time display function part and an age-of-moon display function part equipped with a shade wheel 19 displaying the age of the moon on the basis of the rotation difference with a moon wheel displaying the average position of the moon in synchronous relation to the time display function part are arranged to the same display surface as a time display part. A slip function part is provided to the intermediation wheel arranged in a train wheel. That is, when the sidereal wheel 38 rotates to the left, stretching is generated between either one of the engaging parts 45b, 45d of a rotary direction limiting lever 45 and a sidereal pinion 38b and the slip function part of the second adjusting wheel 35 meshing with the sidereal wheel 38 slips. Only a second adjusting upper gear 35a rotates to the right while the sidereal wheel 38 and the second adjusting lower gear 35b of the second adujsting gear 35 do not rotate to obtain a clock with age-of-moon/sidereal time display having a good matching property and smoothly performing the transmission of the train wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a timepiece having a function of simultaneously displaying at least one of sidereal time or constellation, as well as the position and age of the moon.

[Conventional technology]

For conventional analog watches, for example,
No. 262248, there is a lunar age display section consisting of a phallus for displaying the average position of the moon and a shadow plate for displaying the lunar age using the rotation difference between the lunar plate, and a ring-shaped lunar age display section that displays the average position of the moon in one sidereal day. Except for watches with lunar age and constellation displays that have a constellation plate with a constellation plate depicting constellations near the rotating celestial equator placed on the same display surface as the time display, the average position of the moon, the lunar age and sidereal time, or There has never been a watch that has constellations placed on the same display surface as the time display.

[Problem that the invention seeks to solve]

° However, in the above-mentioned watch with moon phase and constellation display, it is necessary to place the ring-shaped constellation plate on top of the flat upper plate and the shadow plate, which makes the cross-sectional structure thicker, and it is difficult to draw on the constellation plate on the ring. The celestial sphere that can be created is very narrow and limited to constellations near the celestial equator, and when setting the time and the constellation plate, it is necessary to stop the time display with the crown pulled out, and the center hole of the constellation plate must be made smaller. In order to widen the display range, it is necessary to use a material that allows the blade and the shadow plate to be seen through, and in this case, the printing of the constellation plate has the disadvantage that the appearance of the blade and the shadow plate deteriorates. Furthermore, because there is a speed increasing gear train in the wheel train and the frictional force applied to the constellation plate is surface contact, the transmission efficiency of the wheel train was not necessarily good. The purpose of the present invention is to provide a lunar age display that simultaneously displays the average position and age of the moon, as well as a lunar age and sidereal time display that can display a wide range of constellations, has good adjustment properties, and allows easy gear train transmission. It provides a clock.

[Means for solving problems]

The present invention has been made to solve the above problems, and includes a sidereal time or sidereal time and constellation display function section equipped with a stellar wheel that rotates once per sidereal day in synchronization with the time display function section;
Similarly, the moon age display function section includes a moon wheel that displays the average position of the moon in synchronization with the time display function section, and a shadow wheel that displays the moon age using a rotation difference with the moon wheel. By placing it on the same display surface as the time display, the lunar phase display section displays the average position and age of the moon, and the sidereal time and constellation display function section displays the celestial sphere and the range of the celestial sphere above the horizon. The provision of a slip function part in the arranged intermediary chest improves fitting performance.

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of a timepiece with lunar phase and sidereal time display according to the present invention, and FIG. 2 is a plan view of the dial of the timepiece shown in FIG.

In the figure, 1 is a clock with sidereal time display, 2 is a dial,
3 is the hour hand that displays the time, 4 is the minute hand, 5 is the second hand, 6 is the blade, which has a round hole 6a with an angle range of 60 degrees with respect to the center of rotation, and 7 is the shadow plate below the blade 6. Three shielding parts of the same color as the sword root 6 and having the same size as the round hole 6a of the sword root 6 are provided at equal intervals. Reference numeral 8 denotes a ring-shaped sidereal time plate, which is provided with a constellation display window 8a for displaying the celestial sphere above the horizon at 35 degrees north latitude, and a twilight identification window 8b for determining the twilight state. 8a is an arc-shaped curve 8 indicating the horizon at 35° north latitude.
On the sidereal time plate 8 surrounded by cK and facing the curve 8C indicating the horizon, there is a sidereal time reading mark 8d at a position corresponding to the south direction, and letters 8 of N, E, and W indicating the remaining directions.
e is drawn, and the twilight identification window 8b is located at latitude 35 north.
An arcuate curve 8f showing the astronomical twilight limit line with a zenith distance of 108° at 100°, and an arc 8 showing the visible southern limit of -55.6° declination, taking into account horizontal refraction of 0.6° due to atmospheric differences.
surrounded by g. The dial 2 has a 12-hour scale 21 at the position corresponding to the hour hand O.

Further, a moon background part 22 for displaying the color of the moon is provided at a position corresponding to the locus of the round hole 6a of the sword root 6, and in the moon background part 22, a convex boundary that is regarded as the horizon at 35° north latitude is provided. 22b above the part 22a uses a bright color so that the moon is clearly displayed in relation to the sword root and the shade of color is clear, whereas 22C below the border part 22a of the moon background part 22 is used in contrast to the sword root 6. The same color or an inconspicuous color close to it is used, and by using the rotation of the blade 6 and the rotation difference between the blade 6 and the shadow plate 7, the celestial sphere is viewed from the north pole to the south pole with the meridian directly above. In addition to displaying the average position and age of the moon, the moon background part 22 changes the color in which the moon is displayed depending on the display position, so that the state of appearance can be clearly distinguished by color or color shading. Also, the moon background part 22
The boundary portion 22a is continuously changed in color or color shading in order to avoid misidentifying the shape indicated as the phase of the moon and because the actual interval between rise and set times of the moon varies.

Further, the dial 2 is provided with a starry background part 26 at a position corresponding to the locus of the constellation display window 8a and the twilight identification window 8b of the sidereal time plate 8, and the constellation background part 23 has an ecliptic 23a and a red Constellations north of latitude -55.6° (not shown) Background part 2
3 is drawn at equal declination intervals from the outer periphery to the center, and on the ecliptic 23a there is noon (Japan Standard Time) on the 1st day of each month of the average year.
The position of the sun in 12 places is displayed as dashed line breaks 25b, and numbers 23C from l to 1) indicating the corresponding month are drawn near the positions of the 1st of odd months among the breaks 23b, and the numbers 23C corresponding to the month and day are drawn. By reading the sun's position on the ecliptic 23a, the sun's position on the celestial sphere can also be determined, and if the sun's position is within the constellation display window 8a of the sidereal time plate 8 superimposed on the constellation background part 23, it is possible to determine whether it is daytime. If it is within the twilight identification window 8b, it indicates that twilight due to the sun is not occurring, and if it is hidden under the sidereal time plate 8, it indicates that it is in twilight. Also, on the outer periphery of the constellation background part 26, there are numbers 23 of 0.6.12.18 indicating the time of right ascension.
d is drawn, sidereal time reading mark 8d on sidereal time plate 8
It is constructed so that the local sidereal time can be determined by reading the right ascension value corresponding to the .

In addition, the direction of rotation of the sword root 6 and the shadow plate 7 is clockwise according to the movement of the moon when viewed from the north pole to the south pole of the celestial sphere with the meridian directly above, and the rotation direction of the sidereal time plate 80 is also It rotates clockwise to match the direction of rotation of the horizon when looking toward the north pole of the celestial sphere.

Next, a wheel train structure for driving the timepiece shown in FIG. 1 will be explained with reference to FIGS. 3 to 7. 3 and 4 are cross-sectional views showing the essential parts of the wheel train mechanism of the timepiece shown in FIG. 1, and FIG. 5 is a plan layout diagram schematically showing the wheel train of the timepiece shown in Figure 6 (a) is a plan view showing the state of saku due to the overlapping of the sword root and shadow plate, Figure 6 (b) is a plan view showing the desired state due to the overlap of the sword root and shadow plate, and Figure 7 is a plan view of the sidereal time plate.

In the figure, 9 is the fourth wheel to which the second hand 5 is attached, 10 is the central bundle to which the minute hand 4 is attached, and 1) is the hour wheel to which the hour hand 6 is attached. 12
is a hino-ura wheel that meshes with the minute pinion 10a of the center bundle 10 and the cylindrical gear 1) a of the hour wheel 1), and the hour wheel 1) is the cylindrical gear 1).
a and an hour wheel pinion 1) b. Also 13
is one of the three intermediary wheels for adjusting the gear ratio, and is composed of a second rear gear 13a and a second rear pinion 13b, and is attached to the main plate 14. The vertical oysters are held by a back plate 16 which is loosely engaged with the fixed second rear bin 15. A slip function section 13C that slips under a load exceeding a predetermined torque is provided between the two-day back kana 13b. 18 is an adjustment wheel of the second intermediary wheel for adjusting the gear ratio;
Upper adjustment gear 18a meshing with second hour wheel 17 and shadow east 19
and a lower adjustment gear 18b that meshes with the moon wheel 30, and is loosely engaged with the adjustment wheel pin 31 fixed to the main plate 14, and the vertical oyster is held by the back plate 16. 1
Reference numeral 7 denotes a second hour wheel, which is loosely coupled to the hour wheel 1), and is vertically aligned between the main plate 14 and the back plate 16 by combining the hour wheel 1) and a dial washer 32 for eliminating the influence of backlash of the gear train. It is held together including. The moon wheel 60 is loosely coupled to a moon wheel pin 66 fixed to the main plate 14, and the shadow wheel 19 is loosely coupled to the moon wheel 30, so that the effects of backlash between the moon wheel 30, the shadow wheel 19, and the gear train are avoided. Remove the back plate 1 by aligning it with the dial washer 64.
Vertical oysters are held by 6. See you next month! 60
A blade 6 and a shadow plate 7 are attached to one end of the shadow wheel 19 on the dial 2 side, respectively. 65 is the second adjustment wheel of the third intermediary ■ for adjusting the gear ratio, and the second adjustment upper gear 3
5a and a second lower adjustment gear 35b, the main plate 1
The vertical oyster is held by the back plate 16, which is loosely engaged with the second adjusting wheel pin 36 fixed to the second hour wheel 1.
7 and corrective maintenance! Between the second adjustment upper gear 35a that meshes with the correction/maintenance gear 37a of No. 37 and the second adjustment lower gear 35b that meshes with the stellar gear 38a of the star wheel 68, there is a slip function section 35C that slips under a load exceeding a predetermined torque. It is provided. 38 is a stellar wheel, which is composed of a stellar gear 38a and a stellar pinion 38b having sawtooth teeth.
It is loosely coupled to the star wheel pin 69 fixed to the main plate 14, and is held vertically between the back plate 16 together with the dial washer 40 for eliminating the effects of backlash of the gear train. . Further, a sidereal hour plate 8 is attached to one end of the sidereal wheel 680 dial 2 side. Reference numeral 67 denotes a correction transmission wheel, which is composed of a correction and maintenance gear 37a that meshes with the second adjustment upper gear 35a of the second adjustment wheel 65 and a correction transmission pinion 37b that meshes with the correction wheel 41, and is fixed to the main plate 14. The vertical oyster is held by the back plate 16, and the winding stem 4 is held by the back plate 16.
4 to the correction wheel 41 is rotated idle in the normal position 43a and is not transmitted to the correction wheel 41 in the first pull position 43b.
1 is transmitted integrally with the peak 44a of the winding stem 44,
Corrected at second pull position 43C! 41 is disengaged from the winding stem 44, so that the rotational movement from the liaise 43 is transmitted to the correction/maintenance wheel 37 via the correction wheel 41 only at the first pull position 43b. Reference numeral 45 is a rotation direction regulating lever for the star wheel 38, which is loosely engaged with the lever pin 46. The engaging portions 45a-45b are sloped so as not to create a tension when the star pinion 38b of the star wheel 68 rotates clockwise. When the peak formed by the bidirectional engaging parts 45a and 45c engages with the tooth tip of the stellar pinion 38b, the other engaging part 45b・45d
The mountain formed by
Engage on the contrary! ! When the peak formed by 1s45b and 1s45d engages with the tooth tip of the star pinion 38b, the engaging part 45a and
45b is arranged so that the peak formed by the star pinion 38b is located at the toothed part of the stellar pinion 38b, and when the stellar wheel 68 rotates clockwise, the tooth tip of the stellar pinion 38b engages the engagement part 4 of the rotation direction regulating lever 45.
5a and 45b are moved alternately, the rotational direction regulating lever 45 makes a small reciprocating turning motion and slips through without tension, and the stellar wheel 68 also continues to rotate clockwise. However, when the stellar wheel 38 rotates to the left, the rotational direction regulating lever 45 Engagement Wi545 b
Or a second adjustment in which a tension is created between either one of 45d and the stellar pinion 38b and meshes with the stellar wheel 38! 35 slips, the star wheel 38 and the second adjusting wheel 3535b of the second adjusting wheel 35 do not rotate, and only the second upper adjusting gear 35a rotates clockwise.

Next, the operation will be explained.

In Figures 3 and 4, the reduction ratio from the fourth wheel & pinion 9 to the minute pinion 10a is set to 1/60 of the common ratio.
By setting the reduction ratio from 0a to the hour wheel 1) via the Hinoura wheel 12 to 1/12, the tube! 1) rotates once every 1-2 hours.

The average cycle of lunar months, or the waxing and waning of the moon, is 29.530
On the 589th day, the moon's apparent average velocity is -
To match the rotation speed of 6, use the moon wheel 0.966136
From the hour wheel 1) to the moon so that the value is very close to 81 rotations! 30
It is necessary to configure the number of teeth in the gear train to reach .

In addition, the shadow plate 7 displays the moon phase using the rotation difference with the lunar plate 6.
As shown in FIG. 6(a), when the round hole 6a of the moon plate 6 is exactly aligned with one of the shielding parts 7a of the shadow plate 7, as shown in FIG. It is configured so that the moon is displayed when it is exactly located at one of the intermediate positions 7b, and if the number of shielding parts 7a of the shadow plate 7 is n (n is an integer of 2 or more), the apparent movement of the moon is From the direction and the waxing and waning direction, the shadow plate 7 must be delayed with respect to the moon plate 6 by one revolution every 29.530589Xn days, and the shadow! 19 is a shadow from the hour wheel 1) so that it is delayed by a value very close to the rotation per day compared to 130 per month!
It is necessary to configure the gear train with a number of teeth up to 19.

In the case of this embodiment, n=3, and an example of a combination of the number of teeth with a small maximum number of teeth and good approximation accuracy is as follows: hour wheel pinion 1) b
The number of teeth is 23, the number of teeth on the second day back gear 13a is 41, and the number of teeth on the second day back pinion 13b is 40, adjusted! Upper adjustment teeth at 18! 18a has 45 teeth, lower adjustment gear 18b has 31 teeth, month wheel 30 has 32 teeth, and shadow wheel 19 has 47 teeth.
Moon by making a piece! 30 is 0.9661 in a day
The annual cumulative error of the moon plate 6, which rotates 2466 times, is only 1.6 @ behind the apparent average motion of the moon, and the shadow wheel 19 is 0.01 per day relative to the rotational speed of the moon wheel 30. 2
8773 rotations It is necessary that the rotation is very close to the slow 0195483693 rotation, but in the above example of the number of teeth, the shadow wheel 19 rotates 0.95485210 times per day, and the annual cumulative error of the shadow plate 7 with respect to the moon plate 6 is 2.0°. This is a delay of only 0.5 days in terms of the age of the moon.The reason why the hour wheel 1) is made of a combination hour wheel consisting of the hour wheel 1)a and the hour wheel pinion 1)b is as follows. Even when adjusting the gear ratio of the gear train from the hour wheel 1) to the moon wheel 30 and shadow wheel 19 using two intermediary wheels, the second date wheel 13 and the adjustment wheel 18, the combination of the number of teeth is limited. This is because the number of teeth of the hour wheel pinion 1)b can be selected without being constrained by the conditions of meshing with the hour wheel pinion 12.

One average sidereal day, that is, the average period of rotation of the earth relative to the vernal equinox, is 23 hours 56 minutes 4.091 average solar hours, and the apparent average rotational speed of the horizon relative to the celestial sphere is 8 times the sidereal time plate.
In order to match the rotational speed of
4 hours 723 hours 56 minutes 4.091 seconds) rotation i.e. 1
．． Adjust the hour wheel 1) so that the value is very close to 0027379 rotations.
It is necessary to configure the number of teeth of the gear train from the star wheel 38 to the star wheel 38. In this example, the cylinder! 1) Zero hour wheel pinion 1) Number of teeth of b 2
3 teeth, the number of teeth of the second day back pinion 13b of the second day back wheel 13 is 41, and the number of teeth of the second day back pinion 13b is 40, the maximum number of teeth is small and the number of teeth has good approximation accuracy. An example of the combination is the second adjustment upper tooth of the second adjustment wheel 35! 35a has 46 teeth, second adjustment wheel 3535b has 37 teeth, and star wheel 3
By setting the number of teeth of the stellar gear 38a of 8 to 36, the stellar wheel 38 rotates 1.0027100 times per day, and the stellar time plate 8 rotates 1.0027100 times per day.
The 0-year cumulative error is only a lag of 3.7° with respect to the apparent average rotational motion of the horizon relative to the celestial sphere.

The number of teeth of the second hour wheel 17 may be determined to be the most advantageous number depending on the usable mosier range and the planar arrangement conditions of the wheel train, since it functions as an idler that also corrects the rotational direction.

In addition, the blade 6 and the shadow plate 7 are operated by a gear train that includes the modified transmission wheel 37 within a range that does not cause any problem in knowing the approximate position and age of the moon by the slip mechanism of the second sun wheel wheel 13, and the fixed star wheel 13. The time plate 8 is a rotation direction regulating lever 4 that engages with the slip mechanism of the second adjusting blood 35 and the stellar pinion 38b of the stellar wheel 38.
5, the hour hand 6 and the minute hand 4 can be aligned with each other at the first pull position 43b of the liise 43, so that there is no particular need for hour alignment.

The operation at the time of initial alignment will be explained below.

First, calculate the moon's meridian time at the observation site on the previous day of the day to be adjusted, the age of the moon at said meridian time, and the local sidereal time from a scientific chronology or the like.

The crown 43 is pulled out to the second position 43 from the normal position 43a.
By pulling it out to C, the hour hand 3 and minute hand 4 are set to the midpoint of the previous day's month using normal operations.

Next, when the rear wheel 43 is moved from the second pull position 43C to the first pull position 43b, the correction wheel 41 engages with the winding stem 44, and the rotational force of the rear wheel 46 is corrected from the winding stem 44! 41, the correction/maintenance wheel 67, the second adjustment upper gear 35a of the second adjustment wheel 35, and the second hour wheel 17, and then to the adjustment wheel 18.
The rotational force is transmitted from there to the moon wheel 30 and the shadow wheel 19. At the time of the above transmission, the slip function part 13C of the second day back car 13
slips, and the hour hand 6 and minute hand 4 are not quickly adjusted, but in the moon phase display section, the blade 6 attached to the moon wheel 30 and the shadow plate 7 attached to the shadow wheel 19 are quickly adjusted by the rotation of the liise 46. .

Using the above operation, the 12 o'clock position mark 21a indicating the meridian direction of the moon on the dial 2 by rotating the liaise 43 in the forward and reverse directions.
In the direction of , the round hole 6a of the sword root 6 and one of the shielding parts 7a of the shadow plate 7 are aligned so that they form exactly the same shape, and the shape is displayed as a square. At this time, the lunar phase display section indicates the lunar phase of 0. In this case, the round hole 6a of the moon plate 6 is the 12 o'clock position mark 21 of the dial plate 2.
In the first matching state of the shadow plate 7 after repeating the state corresponding to a, the shielding part 7a of the shadow plate 7 is aligned with the round hole 6 of the sword root 6.
a does not overlap completely, and there remains a deviation of 0.52 days or less in terms of the moon phase, but if the deviation is 0.27 to 0.52 days, further adjustment will be made to the alignment position of the next shadow plate 7. Since the fraction of days in the average cycle of the moon's waxing and waning is about 0.53 days by rotating the lilies 43, the deviation can be kept within 0.27 days.

Here, the blade 6 rotates approximately 0.966 times per day, so one rotation of the blade 6 in the right direction is approximately 1) 0.96 in terms of the moon's age.
This corresponds to an advance of 6, or approximately 1.035.

Therefore, if the lunar plate 6 is rotated clockwise by an integer closest to the value divided by 1.035, which is the moon age at the meridian time of the previous day, while keeping the first pull position 43b of the lièze 46, This means that the position of the moon at the time and the age of the moon are almost exactly matched. In this case, it is also converted to lunar age and is 0.52.
A deviation of less than a day's worth occurs, and if the aforementioned 0.27 day's worth is added, a maximum of a 0.79 day's deviation of the moon's age occurs, but it can be said to be accurate enough to know the approximate state of the moon.

Next, the operation of aligning the sidereal time plate 8 with the lunar plate 6 and shadow plate 7 will be explained. In the first-pull state 43b of the liise 43, the rotational force of the crown 430 is transferred from the winding stem 44 to the correction wheel 4.
1, the star wheel 3 via the correction maintenance wheel 37 and the second adjustment wheel 35.
It will be passed on to 8.

Here, when the crown 43 is rotated so that the moon plate 6 and the shadow plate 7 rotate clockwise, the rotation direction regulating lever 45 that engages with the star pinion 38b of the star wheel 38 slips through without causing tension, so the display surface Then, the moon plate 6 and the shadow plate 7 attached to the moon wheel 30 and the shadow wheel 19, which are driven from the sidereal time plate 8 and the second upper adjustment gear 35a via the second hour wheel 17 and adjustment wheel 18, rotate at a predetermined rate. Rotated to the right by the ratio. On the contrary, Liese 4
3 is rotated so that the moon plate 6 and the shadow plate 7 rotate to the left, the engaging portion 45C or 45 of the rotation direction regulating lever 45
Either one of d and a star! 38 and the slip function part 35C of the second adjustment wheel 35 slips, so on the display screen, the sidereal time plate 8 stops and the lunar plate 6 and shadow plate 7 move to the specified position. It is rotated to the left at a rotation ratio of .

Using the above operation, the liaze 43 can be adjusted in a positive direction within a certain angle range.
By repeating the reverse rotation, the sidereal time plate 8 is intermittently rotated to the right, so that the hour hand 3 and minute hand 4 indicate the meridian time of the previous day, and the 12 o'clock position mark on the dial 2 indicates the meridian direction. The round hole 6a of the moon plate 6 coincides with the direction of 21a, and the overlapping of the moon plate 6 and shadow plate 7 displays the moon age at the meridian time of the previous day, and the sidereal time reading mark 8d of the sidereal time plate 8. The local sidereal time read from the right ascension scale provided on the outer periphery of the constellation background part 23 of the dial plate 2 corresponding to 2 is set to match the local sidereal time at the meridian time of the previous day's month.

Next, when the crown 43 is pulled out from the first-pull position 43b to the second-pull position 43c, the rotational force of the crown 43 is applied to the winding stem 44 and the Tsuzumi wheel (not shown) engaged with the winding stem 44 and the Hinoura wheel 12.
is transmitted to the adjustment wheel 18 and the second adjustment wheel 65 via the hour wheel 1), the second date reality 16, and the second cylinder J[17, and further from the adjustment wheel 18 to the moon wheel 30 and the shadow plate 19, Further, rotational force is transmitted from the second adjustment wheel 35 to the star wheel 38. Here, if the hour wheel 1) is rotated so that the hour wheel 1) is rotated clockwise, that is, to advance the time display, then
Since the rotational direction regulating lever 45 that engages b slides through without causing tension, the hour hand 3, minute hand 4, moon plate 6, shadow plate 7, and sidereal hour plate 8 all rotate clockwise at a predetermined rotation ratio on the display surface. be done. After using the above operation to carefully advance the display to the current time of the day in the morning and afternoon, return the liise 46 from the second pull position 43C to the normal position 43H. The initial setting of the shadow plate 7, sidereal time plate 8, and time is completed.

In addition, if the moon's meridian does not occur on the previous day, use the moon's meridian time two days before, the age of the moon at the meridian time, and local sidereal time to perform the above adjustment at the moon's meridian time two days before. After that, the display advances at the Lie's crotch pull position 43C until the current time of the day, and then the Lie's 43 is returned to the normal position 45B and the clock is started.

The clock shown in Figure 1 is located at 35° north latitude and 1:00 am at mean solar time.
It shows the arrangement of the celestial sphere on the horizon and the average position and age of the moon at 0:09:35, 6 o'clock local sidereal time, and the moon's age is 26. It shows the sky at around July 15th in Tokyo when the moon's age is 26. This is roughly equivalent to the arrangement of .

In addition, in this example, a ring-shaped sidereal time plate was used to display sidereal time and constellations at the same time, but when only sidereal time is to be displayed, a needle-shaped sidereal time plate can be used to display sidereal time. is also clear.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in addition to the lunar age display function that simultaneously displays the average position of the moon and the lunar age, it also displays the local sidereal time, the constellations on the celestial sphere, the sun position, and the horizon within the celestial sphere. It is equipped with a sidereal time and constellation display function that allows you to see a certain area at a glance and also determine whether it is in twilight, and the two intermediary cars, the second day back car and the second adjustment car, are each equipped with a slip function. This is a watch with a highly complete lunar age/sidereal time display that is easy to operate during initial adjustment and also allows you to read twilight duration, sunshine duration, and remaining sunshine duration without stopping the time display (average solar time). This makes it possible to create a convenient clock that can be used not only for astronomical observation, but also for daily life such as climbing, farming, etc., and has great practical effects.

[Brief explanation of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a plan view of a timepiece with sidereal time display, FIG. 2 is a plan view of the dial of the timepiece shown in FIG. 1, and FIG. 4 and 4 are cross-sectional views showing the main parts of the train wheel mechanism of the timepiece shown in FIG. 1, FIG. 5 is a plan layout diagram showing an outline of the wheel train of the timepiece shown in FIG. is a plan view showing the state of shading due to the overlapping of the force plate and the shadow plate, Fig. 6 (
B) is a plan view showing the desired state due to the overlap K between the force plate and the shadow plate, and FIG. 7 is a plan view of the sidereal time plate. 2...Dial, 3...Hour hand, 4...
...Minute hand, 5...Second hand, 6...Power plate, 7...Shadow plate, 8...Sidereal time plate, 19
...Shadow wheel, 30...Moon wheel, 38...
... A stellar car. Figure 2 Figure 5 Figure 6 Figure 7

Claims (2)

[Claims] (1) In a watch having a time display section for displaying the time, a sidereal time or sidereal time and constellation display function section comprising a sidereal wheel that rotates once per sidereal day in synchronization with the time;
The time display function section includes a moon phase display function section that also includes a moon wheel that displays the position of the moon in synchronization with the time, and a shadow wheel that displays the moon phase using a rotation difference between the moon wheel and the moon wheel. A clock with a lunar phase and sidereal time display, which is characterized by being placed on the same display surface as the lunar phase and sidereal time. (2) A moon plate is attached to the moon wheel, a shadow plate is attached to the shadow wheel,
A timepiece with moon age/sidereal time display according to claim 1, characterized in that a shadow plate and a moon plate are stacked in this order from the timepiece movement side, and a sidereal time plate is attached to the sidereal wheel.