EP3195755A1 - Uhr, die mit einem dekorativen verkleidungselement aus perlmutt versehen ist - Google Patents

Uhr, die mit einem dekorativen verkleidungselement aus perlmutt versehen ist Download PDF

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Publication number
EP3195755A1
EP3195755A1 EP16152441.8A EP16152441A EP3195755A1 EP 3195755 A1 EP3195755 A1 EP 3195755A1 EP 16152441 A EP16152441 A EP 16152441A EP 3195755 A1 EP3195755 A1 EP 3195755A1
Authority
EP
European Patent Office
Prior art keywords
mother
plate
timepiece
nacre
pearl
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.)
Withdrawn
Application number
EP16152441.8A
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English (en)
French (fr)
Inventor
Philip W. A. Klingenberg
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.)
Century Time Gems Ltd
Original Assignee
Century Time Gems Ltd
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 Century Time Gems Ltd filed Critical Century Time Gems Ltd
Priority to EP16152441.8A priority Critical patent/EP3195755A1/de
Publication of EP3195755A1 publication Critical patent/EP3195755A1/de
Withdrawn legal-status Critical Current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
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0076—Decoration of the case and of parts thereof, e.g. as a method of manufacture thereof
    • 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
    • G04B19/06—Dials
    • G04B19/10—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial

Definitions

  • the present invention relates to the field of watchmaking and jewelery, and in particular to a decorative element for a portable timepiece such as a wristwatch.
  • Mother-of-pearl is highly sought after for its aesthetic properties and the use of mother-of-pearl pieces of different colors and dyes is widespread in the field of jewelery, not only in the form of pearls for earrings or rings, but also for pendants or other types of costume jewelery.
  • An object of the present invention is to allow the use of mother-of-pearl for a piece of clockwork other than a dial intended for wristwatches.
  • An advantage of the proposed solution is to provide a new decorative nacre element for a timepiece that is protected vis-à-vis the outside, but without the optical qualities of it are altered.
  • a thin mother-of-pearl plate is directly glued under the glass and is integral with at least part of the scope of the middle part, and is thus neither exposed to scratches nor to strong constraints. in torsion during the deformation of the housing.
  • Another advantage of this embodiment is that it is possible to easily integrate a mother-of-pearl decorative element at a region of direct or indirect join of the ice to the middle part, and thus simplify the overall assembly of the mother-of-pearl in the case.
  • the materials chosen for the caseband and the ice may also be of similar hardness and thermal expansion coefficients, or even preferably identical, for example in sapphire.
  • the dial is itself preferably mother-of-pearl and the color of the mother-of-pearl plate is preferably adjusted to that of the dial to improve the overall aesthetics of the watch. Specifically, when the color of the middle part is dark, this adjustment is achieved using a paint or a metallization.
  • the figure 1 illustrates a timepiece 1 according to a preferred embodiment for the present invention, which consists of a wristwatch whose housing 2 comprises an oval-shaped middle part 3 made of black and opaque sintered sapphire, to which is assembled a bottom 4 made of a softer material such as metal, precious or not (for example gold or steel) and on the edges of which are preferably crimped a first series 41 of precious stones, such as diamonds, from and 3.
  • This bottom 4 also comprises fasteners 43, typically two in number for fixing each of the strands of the bracelet 9. Such a fastener is referenced on the right of the figure 1 where the bracelet strand 9 is effectively assembled.
  • the middle part 3 is crossed by an adjusting rod 62 of the hands 61 of the movement, of which only the barrel passing through the movement 6 and projecting above the dial 7 is shown in this figure.
  • the casing 2 is closed by an ice-cream 5, preferably made of transparent sapphire, which bears on a bearing surface 31 of the caseband 3, which here consists of a flat and horizontal bearing surface extending over the whole of the case. thickness of the caseband for an edge-to-edge type assembly, that is to say without ice blade for a driving operation.
  • the dial 7 also preferably comprises a second series 72 of precious stones regularly distributed around the periphery of the dial 7 for the indication of the hours; it is also preferably made of mother-of-pearl.
  • the figure 2 illustrates a sagittal sectional view of the wristwatch illustrated by the figure 1 , showing the detail of the different assembly elements of the housing 2 as well as the arrangement of an additional decorative element mother-of-pearl with respect to the latter.
  • the housing 2 is formed by the bottom 4 and the middle part 3, to which it is screwed by means of the assembly screws 42. It is also possible to distinguish the fastener 43 as well as the bar hole for the assembly bracelet 9 and a set stone belonging to the first series 42 of set stones mentioned above.
  • the middle part 3 and the bottom 4 define an internal compartment 20 housing the movement of the watch 6, which is closed on the top by a transparent glass 5 assembled edge-to-edge to the middle part 3.
  • the timepiece 1 comprises by elsewhere a mother-of-pearl plate 8 interposed between the glass 5 and a bearing surface 31 of the middle part 3.
  • the movement 6 is wedged against the inner wall of the middle part 6 by means of a casing ring 63 whose dimensions are intended to fill the radial clearance due to the relative difference between the outer diameter of the caliber of the movement relative to that internal of the middle part.
  • a dial 7 in which are set here twelve precious stones of the second series 72 of precious stones, which is surmounted by a holding piece 71 in height along the axis BB of the barrel of the needles 61 display of the time of the movement 6 / dial 7 assembly, the latter being preferably assembled to one another before their introduction into the housing 2 bottom side.
  • This piece of maintenance here takes the form of a peripheral ring serving as support for the movement block / dial 6 + 7 under the glass 5.
  • this holding piece 71 could also be of an aesthetic vocation, allowing the edges of the dial 7 to be hidden; nevertheless, it will be preferred to perform such masking by slightly overhang a mother-of-pearl plate 8 at the periphery of the dial, as explained below.
  • the mother-of-pearl plate 8 completely covers the bearing surface 31 and is also integrally integral with the ice 5, the lower face of which is here completely flat and horizontal, preferably by means of a gluing, and more precisely a gluing with a very high transparency UV glue in order to obtain a uniform color for mother-of-pearl, not subject to oxidative aging due to contact with the air or to solar radiation, and yellowed by the application of the binder layer. Therefore, in this particular case, the assembly of the ice 5 to the middle part 3 is effected by means of a mother-of-pearl plate 8 of the same shape and dimensions as the middle part 3, here annular in shape.
  • the advantage of the preferred embodiment whose detail of the assembly is illustrated by the figure 3 is that it greatly simplifies the assembly operations of the mother of pearl decorative trim element, replacing the usual ice seal, while ensuring the durability of the aesthetics of this element and its robustness vis-à-vis shocks, despite its relative intrinsic fragility.
  • the mother-of-pearl plate 8 is integrally sandwiched between on the one hand a flat lower peripheral part of the ice 5 - referred to here by the "heel" 51, since the lower surface of the ice 5 is not necessarily completely flat, and the entire scope 31 of the caseband 3, at respective joint areas of equal sizes.
  • the first joint area J1 between the lower face 81 of the mother-of-pearl plate 8 corresponds to the thickness P of the middle part 3 in the radial direction, which is itself substantially equal to the width of the heel 51 at the of the second joint zone J2 at the upper face 82 of the mother-of-pearl plate 8. Consequently, the edge-to-edge sandwiching of the mother-of-pearl plate 8 does not result in any shearing torque of the plate during deformation of the ice 5, for example when immersed under water where a pressure of several bars can be exerted, nor because of a deformation due to thermal expansion or contraction.
  • the dimensions of the first joint area J1 between the portion of the lower surface 81 of the mother-of-pearl plate 8 and the bearing surface 31 may be smaller or greater than the lower surface 81 and the bearing surface 31, depending on whether the plate mother-of-pearl 8 is entirely supported on the bearing surface 31, overflowing slightly, or that the bearing surface does not extend over the entire span 31; and it can instead be considered by default that the second joint area J2 between the upper surface 82 of the mother-of-pearl plate 8 and the heel 51 of the ice 5 is always strictly equal to the upper surface 82, that is to say say that this upper surface is always integrally linked to the ice 5 for aesthetic reasons (homogeneity of the visual appearance of the mother-of-pearl plate seen through the ice 5).
  • alumina Al 2 O 3 constituting sapphire has the advantage of being in various forms that are particularly well suited to the implementation of the invention: a transparent form conventionally used for ice cream in the field of watchmaking, and a dark, opaque shape provided by a sintered sapphire.
  • the span 31 extends over the entire radial thickness P of the middle part 3, and the width L of said mother-of-pearl plate 8 is substantially equal to the radial thickness P of the middle part 3.
  • the assembly is done integrally through the mother-of-pearl plate 8.
  • a direct ice seal remains always between these pieces; however, even in this case it will always be possible to preferably configure the first joining zone J1 between the portion of the lower surface 81 of the mother-of-pearl plate 8 and the bearing surface 31, and the second joining zone J2 between the upper surface 82 of the mother-of-pearl plate 8 and the heel 51 of the ice-cream 5 being mutually superposed and identical, so that the sandwiching is always symmetrical and thus minimizes the exertion of a potential shearing torque on the mother-of-pearl plate 8, but without however having to dispense with a cran of ice to increase the holding of the ice 5 on the middle part 3.
  • the mother-of-pearl plate 8 is provided with a central recess of identical shape to that of the middle part 3 and of a size substantially equal to this, here annular and preferably oval.
  • a square or rectangular shape, and an inner form of middle 3 rather round or oval to match the usual shape of a dial while the outer shape of the middle part could be rectangular or square, or in rhombus, octagonal, dodecagonal or any polygonal shape, but also in the form of pear / drop, shuttle etc., the underlying idea being to consider the mother-of-pearl plate 8 as a kind of extension of the dial 7 on the middle part 3; the slight difference in potential size, of the order of a millimeter at most, would then simply serve as a line of demarcation more or less frank.
  • the annular mother-of-pearl plate 8 may constitute a form of a halo, preferably of the same color as that of the mother-of-pearl of the dial 7; however, it is also possible to combine white mother-of-pearl elements for the dial 7 and gray mother-of-pearl for the outer ring formed by the mother-of-pearl plate 8, and conversely, depending on the desired effect.
  • a preferably liquid glue which polymerizes at a high temperature (above 100 degrees) and an associated oven heating process for several hours above 120 ° degrees, and preferably between 150 ° and 160 ° degrees, is preferably used. to be well beyond the curing temperature; if the mother-of-pearl is darker, we will preferably use acrylic glue in the open air, in which case a few minutes will suffice.
  • This bonding step of the lower surface 81 of the mother-of-pearl plate 8, or alternatively of metallization of the span, is preferably the first step of mounting this decorative element in the housing; then, the ice cream 5, preferably transparent, slightly colored or not, but sapphire because of its advantageous properties in terms of hardness, is adhered to the upper surface 82 thereof with UV transparent acrylic glue, in order to do not distort the tint of mother-of-pearl by yellowing.
  • the UV glue on either side of the mother-of-pearl plate 8, nevertheless the adhesion and holding properties being slightly greater, as well as the profitability in terms of better costs, particularly with regard to a heated glue, and the yields in terms of production rates improved with an acrylic glue, it is preferable to use this type of more effective glue at the first joint area J1 relative to the lower surface 81 of the mother-of-pearl plate 8.
  • the compartment 20 inside the housing 2 is then always available for mounting the movement from the rear, since the bottom 4 to which are set the stones has still not mounted.
  • the facets may however also cover the entire upper face of the ice 5, preferably sapphire, for reasons of homogeneity and aesthetics.
  • the movement is introduced, possibly in a single block with the casing ring 63 and the holding part 71 of the dial slightly curved inwards and which abuts against the underside of the ice and preferably outcrops up to at the inner edge of the caseband 3 and the mother-of-pearl plate 8.
  • the embodiment described above is only a preferred embodiment for the implementation of the invention, and that other variants are possible without departing from the scope of the invention.
  • the mother-of-pearl plate 8 protrudes slightly towards the inside of the caseband 3 for reasons of masking the holding part 71, so that the aesthetics of the timepiece 1 can be improved without requiring a step of assembling an additional masking element for this purpose.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adornments (AREA)
EP16152441.8A 2016-01-22 2016-01-22 Uhr, die mit einem dekorativen verkleidungselement aus perlmutt versehen ist Withdrawn EP3195755A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16152441.8A EP3195755A1 (de) 2016-01-22 2016-01-22 Uhr, die mit einem dekorativen verkleidungselement aus perlmutt versehen ist

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16152441.8A EP3195755A1 (de) 2016-01-22 2016-01-22 Uhr, die mit einem dekorativen verkleidungselement aus perlmutt versehen ist

Publications (1)

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EP3195755A1 true EP3195755A1 (de) 2017-07-26

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EP16152441.8A Withdrawn EP3195755A1 (de) 2016-01-22 2016-01-22 Uhr, die mit einem dekorativen verkleidungselement aus perlmutt versehen ist

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3521945A1 (de) * 2018-02-05 2019-08-07 Montres Rado S.A. Zifferblatt für uhrwerk, und sein herstellungsverfahren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69716055T2 (de) * 1996-03-08 2003-07-10 Citizen Watch Co., Ltd. Solaruhr mit einer zifferblattstruktur für solaruhren und mit einer in dieser uhr untergebrachten solarzelle
EP1950632A1 (de) * 2007-01-29 2008-07-30 Tissot S.A. Uhr mit polygonaler Lünette
EP2796946A1 (de) * 2013-04-24 2014-10-29 ETA SA Manufacture Horlogère Suisse Uhr mit einer digitalen Informationsanzeigevorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69716055T2 (de) * 1996-03-08 2003-07-10 Citizen Watch Co., Ltd. Solaruhr mit einer zifferblattstruktur für solaruhren und mit einer in dieser uhr untergebrachten solarzelle
EP1950632A1 (de) * 2007-01-29 2008-07-30 Tissot S.A. Uhr mit polygonaler Lünette
EP2796946A1 (de) * 2013-04-24 2014-10-29 ETA SA Manufacture Horlogère Suisse Uhr mit einer digitalen Informationsanzeigevorrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3521945A1 (de) * 2018-02-05 2019-08-07 Montres Rado S.A. Zifferblatt für uhrwerk, und sein herstellungsverfahren
WO2019149384A1 (fr) * 2018-02-05 2019-08-08 Montres Rado Sa Cadran pour pièce d'horlogerie et son procédé de fabrication
US12007718B2 (en) 2018-02-05 2024-06-11 Montres Rado Sa Dial for a timepiece and method for manufacturing the same

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