EP0297600A2 - Montre munie d'un cadran et procédé de fabrication d'un tel cadran - Google Patents

Montre munie d'un cadran et procédé de fabrication d'un tel cadran Download PDF

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Publication number
EP0297600A2
EP0297600A2 EP88110550A EP88110550A EP0297600A2 EP 0297600 A2 EP0297600 A2 EP 0297600A2 EP 88110550 A EP88110550 A EP 88110550A EP 88110550 A EP88110550 A EP 88110550A EP 0297600 A2 EP0297600 A2 EP 0297600A2
Authority
EP
European Patent Office
Prior art keywords
dial
glass
hologram
grinding
clock according
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Withdrawn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
EP88110550A
Other languages
German (de)
English (en)
Other versions
EP0297600A3 (fr
Inventor
Hartmut Gunter Gericke
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0297600A2 publication Critical patent/EP0297600A2/fr
Publication of EP0297600A3 publication Critical patent/EP0297600A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • G04B45/0084—Pictures or inscriptions on the case or parts thereof, attaching complete pictures

Definitions

  • the invention relates to a watch according to the preamble of claim 1. It also relates to a method for producing a dial for such a watch.
  • the visually perceptible information can e.g. be a design or a company logo and can contain the usual number of hours on a dial.
  • this object is achieved by the measures specified in claim 1. This makes reading the dial much easier, because the cover glass can be designed in the usual way as glass or crystal, possibly with decorative elements, and the hologram comes into its own because its back is dark and it therefore develops a strong luminosity .
  • the procedure according to claim 2 is particularly advantageous, since the information on the dial contained in the hologram is then used its full luminosity unfolds and there is a particularly good readability of the hour information and any other information contained on the dial.
  • the measure according to claim 3 is extremely advantageous.
  • Glass holograms with a dichromate gelatin layer embedded between glass panes - hereinafter referred to as DCG glass holograms - have considerable internal tensions, and tests have shown that the measure according to claim 3 considerably reduces the reject rate.
  • the measure according to claim 6 is also of particular advantage since it increases the service life of the dial. It is also advantageous to proceed according to claim 7 to secure attachment in the watch case, e.g. by means of a rubber seal or a 1-ring seal. Another possible type of fastening is the subject of claim 8.
  • the fastening of a glass pane on a brass sub-dial is known per se from DE-A 2 318 395.
  • the reduction in the dial thickness can be carried out according to claim 10 by means of face grinding, or in a particularly preferred manner according to claim 11 by hollow grinding, which on the one hand creates space for the hands of the watch and on the other hand results in a mechanically very stable dial.
  • a combination of flat and hollow grinding is also possible.
  • Fig. 1 shows the housing 10 of a watch according to the invention, here a wristwatch.
  • the housing 10 is provided with a removable base 11 in the usual way. It has a cylindrical cavity 12 for receiving a clockwork 13, which is only indicated by dash-dotted lines, and this cavity 12 tapers in its upper region in FIG. 1 via an annular shoulder 14 to a section of smaller diameter.
  • the cavity 12 is closed to the outside by a cover glass 15, which consist of glass, sapphire or a suitable plastic and can be provided with a vapor-deposited decorative layer.
  • the cover glass 15 is attached to the top of the housing 10 in a conventional manner.
  • sub-dial 17 above the clockwork 13, e.g. made of brass with a thickness of 0.1 to 0.4 mm.
  • This sub-dial 17 is provided with two feet 18 which are bent downwards in order to enable an angle-correct attachment to the clockwork 13.
  • the actual dial 20 which is constructed according to the invention in the form of a dichromate gelatin glass hologram (hereinafter: DCG glass hologram).
  • DCG glass hologram dichromate gelatin glass hologram
  • FIG. 7 shows (this figure is shown in the vertical direction on an exaggerated scale), such a dial 20 has a lower glass pane 21 with a thickness of, for example, 0.2 to 0.3 mm.
  • this lower glass sheet 21 is an extremely thin through Visible film made of a suitable plastic, and on this film there is an extremely thin dichromate gelatin hologram 22 which carries the information on the dial, for example the number of hours and other picture elements.
  • This hologram is referred to below as DCG hologram 22.
  • the carrier film is not shown separately because of its small thickness.
  • this upper glass pane 23 which at its strongest point can have a total thickness of approximately 0.9 to 1.2 mm.
  • this upper glass pane 23 is provided with a spherical cap-shaped hollow section 24 with the radius R and therefore has a depth d at its deepest point, which can be, for example, 0.8 mm, so that the glass pane 23 is on at its thinnest point it still has a material thickness of 0.1 to 0.3 mm, for example.
  • the radius R can, for example, be on the order of 10 to 15 cm.
  • the depth d is preferably between 0.6 and 1 mm, but other depths are not excluded.
  • a pointer shaft 26 (Fig. 1), the latter is formed in the usual way and an hour hand 27, above a minute hand 28, and possibly also a second hand - not shown wearing.
  • the bore 25 is internally covered with a moisture-proof protective layer, e.g. made of epoxy resin.
  • the dial 20 is provided on its outer circumference with a ring shoulder 30 which is complementary to the ring shoulder 14. Furthermore, in the area of the DCG hologram 22 it is provided with a seal 31, e.g. in the form of a thin layer serving as a moisture barrier, in order to prevent moisture from penetrating into the DCG hologram 22.
  • Layer 31 may e.g. be made from an epoxy resin.
  • the lower glass pane 21, the thickness of which is preferably also on the finished DCG glass hologram 20 by a surface grinding process is reduced, on its underside, based on FIGS. 1 and 7, provided with a color layer 32, for example of black, blue, green or golden color.
  • a color layer 32 for example of black, blue, green or golden color.
  • the bore 25 is preferably produced by simultaneously drilling into the upper glass pane 23 and into the lower glass pane 21.
  • the reason for this is that DCG glass holograms are subject to considerable internal stresses due to the shrinking of the hologram layer 22. If drilling is carried out from both sides at the same time, the risk that the dial 20 will break due to its internal tensions is considerably lower.
  • the dial 20 is attached to the sub-dial 17 for assembly, e.g. by gluing, and then the dial arrangement thus formed is attached to the movement 13 by means of the feet 18, so that the pointer shaft 26 projects through the bore 25. Now the pointers 27, 28 are mounted on the pointer shaft 26.
  • the arrangement of clockwork 13 and dial 20 thus formed is then inserted into the housing 10 in the correct angular position from below until the shoulder 30 of the dial 20 rests against the shoulder 14 of the housing 10. The usual remaining assembly operations are then carried out, i.e. fastening the crown and closing the base 11.
  • the hollow grinding 24 results in a space in which the hour hand 27 with its relatively short length can be accommodated at the bottom, and possibly also the minute hand 28 with its longer length.
  • the thickened edge of the upper glass pane 23, which is created by the hollow grinding 24, gives the required stability of the dial 20, so that it can have in its center the thickness required for the dial of a wristwatch, for example, only 0.4 mm, but on the other hand has the necessary mechanical stability because its edge is much thicker.
  • Fig. 2 shows a variant, namely here on the dial 20 '- after the DCG glass hologram has been produced - the thicknesses of the upper disk 23' and the lower disk 21 'of the DCG glass hologram are reduced by surface grinding, preferably to a total of approximately 0.4 mm, the remaining thickness of the upper disc 23 'is greater than that of the lower disc 21'.
  • an annular shoulder for bearing against the annular shoulder 14 of the housing 10 is provided in the upper glass pane 23 '.
  • the dial 20 ' is attached to the sub-dial 17 and shows a layer of paint on its back.
  • Fig. 3 shows a dial 20 ⁇ , in which the lower glass pane 21 ⁇ of the DCG glass hologram - after its production - plane ground and the upper pane 23 ⁇ is provided with a hollow section 24 ⁇ .
  • the upper disk 23 ⁇ has here - to increase the stability and to simplify the manufacture - no ring shoulder and, as shown, lies with its edge against the ring shoulder 14 of the housing 10.
  • the distance between the annular shoulder 14 of the housing 10 and the underside of the cover glass 15 can be smaller here than in the housing according to FIG. 1 or 2.
  • the dial 20 ′′′ has essentially the same structure as in FIG. 2, but has no ring shoulder, but rests with its upper edge against the ring shoulder 14 of the housing 10.
  • both glass panes of the dial 20 IV - after the DCG glass hologram has been produced - are ground flat, but here the lower glass pane 21 IV is thicker than the upper glass pane 23 IV , the latter with its upper edge against the annular shoulder 14 of the housing 10 is present.
  • the dial 20 V has the shape shown in FIG. 8, ie it has a so-called facet cut on its outer edge.
  • the lower glass pane 21 V has a facet 36
  • the upper glass pane 23 V has a facet 37, as shown in FIG. 8.
  • both facets can run at 45 °. They facilitate assembly by pressing into the I-ring 35 in FIG. 6.
  • the dial 20 V is on the side protected by a protective layer 31 and carries a color layer 32 at the bottom to increase the luminosity of the DCG glass hologram 20 V.
  • both glass panes 21 V and 23 V can have the same thickness by surface grinding.
  • the thickness of the two glass panes is usually unequal, since these glass panes have a manufacturing tolerance of the order of 0.2 mm and the same thickness is therefore more of a random result.
  • the same thickness of both glass panes is not required for the function of the dial.
  • holograms with a rich, bright color of the complete hologram dial can be used for dials according to the invention. This coloring is also known as a screen.
  • the top of the outer edge of the glass pane 23 can have a very small distance from the bottom of the cover glass, for example 0.3 mm or less as shown. This enables the use of such a DCG glass hologram in a watch case 10 of normal thickness.
  • the distance between the top of the DCG glass hologram 20 ', 20 ′′′, 20 IV or 20 V and the bottom of the cover glass 15 must of course be larger, since there must be space for the pointers.
  • Fig. 3 the same applies as in Fig. 1, ie the distance between the top of the outer edge of the glass pane 23 ⁇ and the bottom of the cover glass 15 can be small and, for example, 0.3 mm or less, so that here too a flat Construction of a wristwatch is made possible.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Holo Graphy (AREA)
EP88110550A 1987-07-03 1988-07-01 Montre munie d'un cadran et procédé de fabrication d'un tel cadran Withdrawn EP0297600A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873722012 DE3722012A1 (de) 1987-07-03 1987-07-03 Uhr mit einem zifferblatt
DE3722012 1987-07-03

Publications (2)

Publication Number Publication Date
EP0297600A2 true EP0297600A2 (fr) 1989-01-04
EP0297600A3 EP0297600A3 (fr) 1989-07-05

Family

ID=6330843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110550A Withdrawn EP0297600A3 (fr) 1987-07-03 1988-07-01 Montre munie d'un cadran et procédé de fabrication d'un tel cadran

Country Status (2)

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EP (1) EP0297600A3 (fr)
DE (1) DE3722012A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803784A1 (fr) * 1995-11-14 1997-10-29 Citizen Watch Co., Ltd. Structure d'unite d'affichage destinee a un dispositif electronique

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7022647U (de) * 1969-07-05 1972-10-12 Sakata Watch Co Ltd Uhrenglas und zugehörige Uhr
FR2212573A1 (fr) * 1972-12-29 1974-07-26 Seiko Instr & Electronics
DE2423362A1 (de) * 1974-05-14 1975-11-27 Erich Fuchs Zifferbaltt fuer kirchturmuhren mit zeiger
DE8005369U1 (de) * 1980-02-28 1980-05-29 Wilhelm Haid Kg Uhrenfabrik, 7417 Pfullingen Zifferblatt für eine Uhr
GB2062907A (en) * 1979-11-09 1981-05-28 Citizen Watch Co Ltd Decorative front plate for timepiece
JPS5875085A (ja) * 1981-10-30 1983-05-06 Seiko Epson Corp 時計用文字板
JPS6219786A (ja) * 1985-07-18 1987-01-28 Dainippon Printing Co Ltd ホログラム付き時計文字板
FR2587504A1 (fr) * 1985-09-19 1987-03-20 Mutzel Francis Montre-hologramme
EP0221233A1 (fr) * 1985-10-07 1987-05-13 Eta SA Fabriques d'Ebauches Pièce d'horlogerie dont la boîte est réalisée en un matériau dur

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH598970A4 (fr) * 1970-04-21 1974-05-31
DE2318395A1 (de) * 1973-04-12 1974-10-24 Uebelhoer Fa Karl Zifferblatt fuer anzeigevorrichtungen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7022647U (de) * 1969-07-05 1972-10-12 Sakata Watch Co Ltd Uhrenglas und zugehörige Uhr
FR2212573A1 (fr) * 1972-12-29 1974-07-26 Seiko Instr & Electronics
DE2423362A1 (de) * 1974-05-14 1975-11-27 Erich Fuchs Zifferbaltt fuer kirchturmuhren mit zeiger
GB2062907A (en) * 1979-11-09 1981-05-28 Citizen Watch Co Ltd Decorative front plate for timepiece
DE8005369U1 (de) * 1980-02-28 1980-05-29 Wilhelm Haid Kg Uhrenfabrik, 7417 Pfullingen Zifferblatt für eine Uhr
JPS5875085A (ja) * 1981-10-30 1983-05-06 Seiko Epson Corp 時計用文字板
JPS6219786A (ja) * 1985-07-18 1987-01-28 Dainippon Printing Co Ltd ホログラム付き時計文字板
FR2587504A1 (fr) * 1985-09-19 1987-03-20 Mutzel Francis Montre-hologramme
EP0221233A1 (fr) * 1985-10-07 1987-05-13 Eta SA Fabriques d'Ebauches Pièce d'horlogerie dont la boîte est réalisée en un matériau dur

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 11, Nr. 197 (P-589)[2644], 25. Juni 1987; & JP-A-62 019 786 (DAINIPPON PRINTING CO., LTD) 28-01-1987 *
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 168 (P-212)[1313], 23. Juli 1983; & JP-A-58 075 085 (SUWA SEIKOSHA K.K.) 06-05-1983 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803784A1 (fr) * 1995-11-14 1997-10-29 Citizen Watch Co., Ltd. Structure d'unite d'affichage destinee a un dispositif electronique
EP0803784A4 (fr) * 1995-11-14 1998-04-15 Citizen Watch Co Ltd Structure d'unite d'affichage destinee a un dispositif electronique

Also Published As

Publication number Publication date
DE3722012A1 (de) 1989-01-12
EP0297600A3 (fr) 1989-07-05

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