EP4369113A2 - Mechanismus zur anzeige der phasen einer mond - Google Patents

Mechanismus zur anzeige der phasen einer mond Download PDF

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Publication number
EP4369113A2
EP4369113A2 EP24159406.8A EP24159406A EP4369113A2 EP 4369113 A2 EP4369113 A2 EP 4369113A2 EP 24159406 A EP24159406 A EP 24159406A EP 4369113 A2 EP4369113 A2 EP 4369113A2
Authority
EP
European Patent Office
Prior art keywords
moon
display mechanism
shutter
phase display
profile
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP24159406.8A
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English (en)
French (fr)
Inventor
Nicolas Debaud
Bernat Monferrer
Pierpasquale Tortora
Cédric BLATTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blancpain SA
Original Assignee
Blancpain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Blancpain SA filed Critical Blancpain SA
Priority to EP24159406.8A priority Critical patent/EP4369113A2/de
Publication of EP4369113A2 publication Critical patent/EP4369113A2/de
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
    • G04B19/268—Clocks or watches with indicators for tides, for the phases of the moon, or the like with indicators for the phases of the moon
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
    • G04B19/266—Clocks or watches with indicators for tides, for the phases of the moon, or the like with indicators for tides
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0866—Special arrangements

Definitions

  • the present invention relates to a moon phase display mechanism. More precisely, the moon phase display mechanism according to the invention is intended to equip a small portable object such as a timepiece, in particular a wristwatch.
  • Timepieces in particular wristwatches, equipped with a moon phase display mechanism have been known for a long time.
  • These moon phase display mechanisms are nevertheless more decorative than they provide information allowing the owner of the watch to easily determine in which quarter of the moon he is located.
  • the simplest moon phase display mechanisms include a needle indicator that points to the different representations of the phases of the Moon (first quarter, full moon, last quarter, new moon).
  • Other known moon phase display mechanisms include a disc which carries two representations of the Moon, part of this disc being visible through a suitably shaped opening in the dial of the watch and successively revealing a waxing moon , a full moon, a waning moon and a new moon.
  • Such a presentation of the different phases of the Moon is very advantageous from an aesthetic point of view; nevertheless, the way in which the Moon is represented has only a distant relationship with the way in which the lunar body appears in the sky.
  • Yet another moon phase display mechanism includes a two-color sphere that makes a complete rotation on itself each lunar cycle.
  • Such a moon phase display mechanism makes it possible to represent the face of the Moon in a manner realistic.
  • such a moon phase display mechanism uses a sphere to represent the different quarters of the Moon, it is thick and takes up a lot of space, so that it is difficult to integrate into a movement of the Moon. horology in particular a wristwatch.
  • the present invention aims to provide a moon phase display mechanism which provides a moon phase display which is notably more faithful to reality and more easily understandable for the owner of the watch.
  • the present invention relates to a moon phase display mechanism driven by a clockwork movement according to claim 1 of the patent.
  • the observer sees a terminator, that is to say the curve which separates the illuminated part from the dark part of the Moon, whose profile is very realistic and very faithful to what the user can see when observing the Moon in the sky.
  • the moon phase display mechanism is more compact than a moon phase display mechanism using a sphere and can thus be accommodated in a smaller volume such as that of a one-piece box. wristwatch type timepieces.
  • the moon phase display mechanism according to the invention is half as thick as a moon phase display mechanism using a sphere.
  • the moon phase display mechanism according to the invention does not hinder the movement of the hands on the surface of the dial.
  • the drive means comprise a rectilinear rack which is driven by the clockwork movement and with which the shutter is coupled in a fixed manner in translation.
  • the present invention provides a moon phase display mechanism making it possible to display the different aspects of the Moon day after day in an original manner and easily intelligible by the user.
  • the representation of the Moon which is provided by the moon phase display mechanism according to the invention is very close to the real appearance of the Moon in the sky, so that it is much simpler for the user to determine which period of the lunar cycle the Moon is in.
  • the moon phase display mechanism according to the invention is also thinner than those using a sphere rotating on itself, and therefore easier to integrate into a clock movement, in particular a wristwatch.
  • its representation is always visible to the owner of the watch.
  • the moon phase display mechanism makes it possible to obtain a representation of the different phases of the realistic Moon, formed by two surfaces of different colors and separated by a terminator, that is to say say the curve which separates the illuminated part from the dark part of the Moon, whose profile is very realistic and very faithful to what the user can see when observing the Moon in the sky. This is particularly the case during the first and last quarter of the moon, when optical distortions are almost zero and the terminator thus appears perfectly rectilinear.
  • the present invention proceeds from the general inventive idea which consists of transferring a representation of the Moon on one or the other of the two upper and lower faces of a transparent support which is placed above and at a distance from a substrate, with the interposition of a shutter between the transparent support and the substrate.
  • the face of the Moon can be depicted in a color similar to that of the substrate, while the shutter and the substrate have reverse contrasts: if the substrate is light, then the shutter will be dark, and vice versa, if the substrate is dark, the shutter will be clear.
  • the representation of the Moon and the substrate are dark and the shutter is light
  • the representation of the Moon which is above the dark substrate is not perceptible to the observer.
  • the representation of the Moon gradually becomes perceptible to the user.
  • the present invention thus provides a more compact mechanism that moon phase display mechanisms which include a sphere and which make it possible to display the moon phases in an original and much more realistic manner than most art moon phase display devices allow prior. Consequently, the observer has a much easier time understanding which period of the lunar cycle he or she is in.
  • the realism is further increased if, in accordance with a special form of execution of the invention, the transparent support is given a plano-concave profile preferably but not necessarily aspherical and such a transparent support is combined with a curved shutter, preferably hyperbolic in profile.
  • a plano-concave profile preferably but not necessarily aspherical and such a transparent support is combined with a curved shutter, preferably hyperbolic in profile.
  • the moon phase display mechanism 1 is driven by a clockwork movement, that is to say a mechanism whose the operation depends on the division of time. More precisely, the clock movement comprises a timer mobile of which a pinion (not visible in the figures) drives a 24-hour wheel 2 which, as its name indicates, is arranged so as to complete one complete revolution per day.
  • the 24-hour wheel 2 carries a finger 4 on an axis 6 of which this finger 4 is mounted free to rotate.
  • the finger 4 is mounted on the axis 6 with a slight axial play thanks to a ring 8 engaged on this axis 6.
  • the finger 4 is provided with a pin 10 which projects into an oblong hole 12 made in the thickness of the 24-hour wheel 2 and which limits the freedom of pivoting of the finger 4 relative to the 24-hour wheel 2 (see figure 2 ).
  • the pin 10 abuts against an interior wall 14 of the oblong hole 12, it is rotated by the 24-hour wheel 2 and in turn drives the finger 4 which, too, makes a complete revolution in 24 hours.
  • the moon phase display mechanism 1 also comprises a first rocker 16 which is pivotally mounted around a pivot axis 18 and which is applied elastically against a first part 20a of a profile 20 of the finger 4 by an upper spring 22.
  • a first rocker 16 which is pivotally mounted around a pivot axis 18 and which is applied elastically against a first part 20a of a profile 20 of the finger 4 by an upper spring 22.
  • a star 24 whose position is indexed by a jumper 26 which is held elastically against a toothing 28 of this star 24 by a lower spring 30.
  • the 24-hour wheel 2 turns clockwise, driving with it the finger 4.
  • the first rocker 16 thus slides along the first part 20a of the profile 20 of the finger 4 and, after passing through a position intermediate A ( Figure 3A ), finds itself in an extreme position B ( Figure 3B ) in which it is supported by a foot 32 against a vertex 34 of the profile 20 of the finger 4. Furthermore, the first rocker 16 comes into engagement via a nose 36 with the teeth 28 of the star 24.
  • the finger 4 advances further, the first rocker 16 exceeds the extreme position B in which it rests against the vertex 34 of the profile 20 of the finger 4, and drives the star 24 one step in the direction counterclockwise.
  • the jumper 26 passes, against the restoring force of the lower spring 30, from a hollow between two consecutive teeth of the teeth 28 of the star 24 to the immediately following hollow of this toothing 28 . Falling back into the next hollow, the saltire 26 allows the star 24 to complete its advance of one step and once again ensures the precise positioning of this star 24.
  • this manual correction device comprises a second rocker 40 pivoted around an axis 42 and which comprises an actuating means 44 such as a pin at an end opposite the axis pivot 42.
  • This second rocker 40 comprises for example a folded zone 46 against which a corrector (not visible in the drawing) rests when the latter is actuated against the elastic return force of a spring by the owner of the wristwatch from outside the volume of the watch case.
  • the second rocker 40 pivots around its axis 42 and in turn controls the pivoting of the first rocker 16 so as to cause the star 24 to advance by one step.
  • This advance of the star 24 takes place under the same conditions as those described above when the first rocker exceeds the vertex 34 of the profile 20 of the finger 4.
  • a complete revolution of the star 24 corresponds to two successive lunar cycles, a lunar cycle corresponding to the time which elapses between two new successive Moons and which is also called month lunar.
  • the moon phase display mechanism according to the invention is completed by a first pinion 50 mounted coaxially and fixed in rotation on the star 24, by a return 56 as well as by a cam 52 on the the axis of rotation of which is fixed fixed a second pinion 54.
  • the first pinion 50 drives the second pinion 54 via the gearbox 56, the tooth ratios of this kinematic chain being calculated so that the cam 52 makes one revolution complete per lunar cycle.
  • the cam 52 has a spiral profile 58 provided with a substantially rectilinear recess 60.
  • a first rake 62 equipped with a toothed sector 64 is also provided with a feeler tip 66 by which it permanently follows the profile 58 of the cam 52. Shortly before the start of a new lunar cycle, for example at around midnight, the feeler tip 66 of the first rake 62 is located at the top of the profile 58 of the cam 52 (position C - Figure 4A ), then falls along the recess 60 of the cam 52 (position D - figure 4B ).
  • the first rake 62 which, through its toothed sector 64, is in permanent engagement with a third pinion 68, causes this third pinion 68 to rotate clockwise by an amount corresponding to the fall of the feeler tip 66 along the recess 60.
  • the third pinion 68 rotates a wheel 70 with which it forms a mobile 69.
  • the third pinion 68 is mounted on the wheel 70 coaxially and fixed in rotation relative to this wheel 70. Consequently, the wheel 70 transmits its rotational movement to drive means 72 of the moon phase display mechanism 1 which comprise a lower wheel 74 and an upper wheel 78 mounted free to rotate on an axis of rotation 76.
  • the lower wheel 74 meshes with a rectilinear rack 80 which in turn meshes with the upper wheel 78.
  • the lower wheel 74 is responsible for controlling the moon phase display mechanism 1.
  • the lower wheel 74 drives the rectilinear rack 80 in translation and pushes it back into a first extreme position E illustrated in Figure 8A which corresponds to the start of a new lunar cycle.
  • the feeler tip 66 begins to follow the profile 58 of the cam 52 again, the feeler tip 66 is gradually pushed back into the clockwise towards a second extreme position F (see Figure 8B ), so that the third pinion 68, and therefore the wheel 70, rotate counterclockwise.
  • the lower wheel 74 turns clockwise and drives the rectilinear rack 80 in translation from the right to the left of the drawing from its first extreme position E which corresponds to the start of a new lunar cycle up to its second position extreme E illustrated in Figure 8B which corresponds to the end of the lunar cycle.
  • the moon phase display mechanism according to the invention is supplemented by a device which makes it possible to compensate for the gaps and return this moon phase display mechanism to its extreme position E at the end of a lunar cycle.
  • This device consists of the upper wheel 78 engaged on the one hand with the teeth of the rectilinear rack 80, and on the other hand with an intermediate wheel 82 of an intermediate mobile 84 which also includes an intermediate pinion 86.
  • This pinion intermediate 86 meshes with a toothed sector 88 of a second rake 90 which is elastically constrained by the restoring force of a fourth spring 92. Thanks to this arrangement, all the play in the kinematic chain which extends between the first rake 62 and the second rake 90, so that the positioning of the rectilinear rack 80 is always precise.
  • the moon phase display mechanism 1 comprises the rectilinear rack 80 with which a shutter 94 is coupled in a fixed manner in translation.
  • the moon phase display mechanism 1 also comprises, on the side of an observer 96, a transparent support 98 provided with an upper face 100 which extends parallel to and at a distance from a lower face 102.
  • a representation 104 of the Moon for example in the form of a decal, is transferred to the upper face 100 of the transparent support 98.
  • This representation 104 of the Moon could also be transferred to the lower face 102 of the transparent support 98.
  • a substrate 106 is, relative to the observer 96, placed under the transparent support 98, at a distance from this last.
  • the shutter 94 is mounted on the rectilinear rack 80 so as to be able to gradually penetrate into the space which separates the transparent support 98 from the substrate 106 when the rectilinear rack 80 is driven by the lower wheel 74.
  • the shutter 94 and the substrate 106 has inverted contrasts: either the shutter 94 is light and the substrate 106 as well as the representation 104 of the Moon are dark, or the shutter 94 is dark and the substrate 106 as well as the representation 104 of the Moon are clear.
  • the representation 104 of the Moon and the substrate 106 are dark and that the shutter 94 is light and reflective
  • the representation 104 of the Moon is above the dark substrate 106 and is therefore not perceptible by the observer 96.
  • the clear and reflective shutter 94 enters the space which separates the transparent support 98 from the dark substrate 106
  • the representation 104 of the Moon gradually becomes perceptible by the user. More precisely, when the shutter 94 begins to penetrate the space between the transparent support 98 and the dark substrate 106, the observer 96 gradually sees the first quarter of the moon appear.
  • the observer 96 sees the representation 104 of the Moon in full: it is the full moon. Then, the shutter 94 continues its rectilinear movement in the same direction and begins to leave the space between the transparent support 98 and the dark substrate 106, so that the observer 96 sees the last quarter of the moon gradually appear, situation which corresponds to the moment when the shutter 94 leaves the same surface free as masked.
  • the observer 96 again no longer sees the representation 104 of the Moon (in the hypothesis where the substrate 106 is of the same color as representation 104 of the Moon) and therefore knows that the lunar cycle has ended and that a new lunar cycle will begin.
  • the observer 96 has an easily intelligible representation of the different phases of the Moon: new moon, first quarter moon, full moon, last quarter moon then new moon again.
  • the transparent support 98 is in the form of a lens 108 of plano-concave shape delimited upwards, on the side of the observer 96, by a flat surface 110 which receives the representation 104 of the Moon, and delimited downwards by a concave surface 112 which is given a preferably aspherical profile.
  • This aspherical plano-concave lens 108 is combined with a shutter 94 folded in its center to give it a curved profile, preferably but not necessarily hyperbolic.
  • the aspherical plano-concave lens 108 is made of a transparent material whose refractive index is preferably between 1.60 and 1.85, with an optimal value around 1.78. This value was chosen after numerous tests which made it possible to note that, the higher the value of the refractive index of the material in which the lens is made, the closer it was necessary to bring the lens closer to the shutter 94 so that this latter is not visible to the observer through this lens. It is easy to understand that this is favorable from the point of view of space requirements in the case where it is desired to integrate a moon phase display device conforming to the present invention in a timepiece of the wristwatch type. On the other hand, the higher the refractive index, the more expensive and difficult the corresponding material is to machine.
  • the aspherical plano-concave lens 108 is obtained by machining a block of cylindrical glass whose diameter D is between 6 mm and 7 mm and whose height H is between 0.9 mm and 1.1 mm (see Figure 5 ).
  • this is obtained from a rectangular-shaped sheet whose thickness e is preferably but not limited to between 0.08 mm and 0.2 mm, and whose length l of side which extends parallel to the direction of movement of the shutter 94 is chosen to be between 7 mm and 8 mm, while the width L of the side which extends perpendicular to the direction of movement of this shutter 94 is chosen to be between between 9mm and 10mm.
  • This sheet is provided in its center with a fold 114 which extends in a direction parallel to the direction of movement of the shutter 94 and preferably has flat edges 116 parallel to the fold 114.
  • the profile of the aspherical concave surface 112 of the aspherical plano-concave lens 108 is determined by the values of the distances r and z(r). If we call S the central axis of symmetry of the aspherical plano-concave lens 108, the distance r corresponds to the distance which separates each point of the central axis of symmetry S from the point of the aspherical concave surface 112 which is located opposite (see Figure 6 ). Likewise, the hyperbolic profile of the shutter 94 is determined by the distance r' which separates each point of the plane of symmetry S' of this shutter 94 from the surface of the latter.
  • the origin of the function z(r) corresponds to the point O which is at the top of the vault formed by the aspherical concave surface 112.
  • the value of the function z(r) corresponds, at each point of the vault formed by the aspherical concave surface 112, at the height of this point considered from the base of the aspherical plane-concave lens 108.
  • the constant R corresponds to the radius of curvature of the aspherical concave surface 112 at point O which is at the top of the vault formed by this aspherical concave surface 112. So that the terminator T which is the dividing line between the dark part and the illuminated part of the Moon appears rectilinear in the middle of the lunar cycle, it is necessary that in the vicinity of point O the concave aspherical surface 112 is practically flat. For this purpose, a very large value of the radius of curvature R , of the order of several thousand millimeters, is initially introduced into the computer-aided design software.
  • conical section we mean a plane curve defined by the intersection of a cone of revolution with a plane. When the cutting plane does not pass through the vertex of the cone, its intersection with this cone corresponds to one of the following plane curves: ellipse, parabola or hyperbola.
  • k -e 2 with e which corresponds to the eccentricity of the conic section.
  • the eccentricity of a conic section is a positive real number which only characterizes the shape of this conic section;
  • the eccentricity of a conic section can be interpreted as a measure of the amount by which a conic section deviates from a circle.
  • the eccentricity of a circle is zero.
  • the eccentricity of an ellipse that is not a circle is strictly between zero and one.
  • the eccentricity of a parabola is equal to 1 and the eccentricity of a hyperbola is greater than 1.
  • the simulation begins with a zero value of the conical constant k and a very large value of the radius of curvature R.
  • the shutter 94 can be considered as the object whose image is perceived through the aspherical plano-concave lens 108 and, as such, its geometric characteristics can be determined by software. computer-aided design of optical systems such as LightTools.
  • the aspherical plano-concave lens 108 is of even order, so that we start by arbitrarily choosing values for the coefficients A 4 , A 6 and A 8 .
  • the person skilled in the art is guided by the fact that he knows that the values of these coefficients are very low and that they continue to decrease over time. as the index n increases.
  • a representation 118 of the Moon and its terminator T is simulated for several positions of the shutter 94 (see figures 7 And 9A to 9L ).
  • FIG 9A we are at the start of a lunar cycle.
  • the Moon is in its first quarter.
  • Figure 9F we are in the middle of the lunar cycle and the Moon is full.
  • Figure 9I corresponds to the last quarter of the Moon and the figure 9L We are at the new Moon.
  • the value retained for the aspherical plano-concave lens 108 is equal to -1, which corresponds to a parabolic profile.
  • the value of the conicity constant k' which characterizes the profile of the shutter 98 this is less than -1, which corresponds to a hyperbolic profile.
  • the point O which is located at the top of the vault formed by the aspherical concave surface 112 is at a distance P equal to 0.78 mm relative to the base of the cylindrical glass block. Consequently, we deduce that at this point O, the thickness of the aspherical plano-concave lens 108 is 0.22 mm. This is the minimum thickness of the aspherical plano-concave lens 108.
  • the present invention is not limited to the embodiment which has just been described and that various modifications and simple variants can be envisaged by those skilled in the art without departing from the scope of the invention as defined. by the appended claims.
  • the shutter in the case where the shutter is clear, it can be covered with a layer of phosphorescent material such as that marketed under the registered trademark Super-LumiNova ® .
  • the surface of the shutter in order to avoid light reflection phenomena, the surface of the shutter can advantageously have roughness. Still with the same aim of limiting light reflections as much as possible, the plano-concave lens can be subject to anti-reflective treatment and its edges can be metallized.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Lenses (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
EP24159406.8A 2019-12-23 2019-12-23 Mechanismus zur anzeige der phasen einer mond Pending EP4369113A2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP24159406.8A EP4369113A2 (de) 2019-12-23 2019-12-23 Mechanismus zur anzeige der phasen einer mond

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19219495.9A EP3842875A1 (de) 2019-12-23 2019-12-23 Mondphasen-anzeigemechanismus
EP24159406.8A EP4369113A2 (de) 2019-12-23 2019-12-23 Mechanismus zur anzeige der phasen einer mond

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP19219495.9A Division EP3842875A1 (de) 2019-12-23 2019-12-23 Mondphasen-anzeigemechanismus

Publications (1)

Publication Number Publication Date
EP4369113A2 true EP4369113A2 (de) 2024-05-15

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EP24159406.8A Pending EP4369113A2 (de) 2019-12-23 2019-12-23 Mechanismus zur anzeige der phasen einer mond
EP19219495.9A Pending EP3842875A1 (de) 2019-12-23 2019-12-23 Mondphasen-anzeigemechanismus

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EP19219495.9A Pending EP3842875A1 (de) 2019-12-23 2019-12-23 Mondphasen-anzeigemechanismus

Country Status (5)

Country Link
US (1) US11940760B2 (de)
EP (2) EP4369113A2 (de)
JP (1) JP7075462B2 (de)
CN (1) CN113093505B (de)
RU (1) RU2761130C1 (de)

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EP3842874B1 (de) * 2019-12-23 2023-09-20 Blancpain SA Optische vorrichtung, mit der sich ästhetische und technische optische effekte erzeugen lassen

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US11940760B2 (en) 2024-03-26
EP3842875A1 (de) 2021-06-30
US20210191331A1 (en) 2021-06-24
CN113093505A (zh) 2021-07-09
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CN113093505B (zh) 2022-09-20
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