EP3896534A1 - Teilweise transparenter uhrzeiger und sein herstellungsverfahren - Google Patents

Teilweise transparenter uhrzeiger und sein herstellungsverfahren Download PDF

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Publication number
EP3896534A1
EP3896534A1 EP20170046.5A EP20170046A EP3896534A1 EP 3896534 A1 EP3896534 A1 EP 3896534A1 EP 20170046 A EP20170046 A EP 20170046A EP 3896534 A1 EP3896534 A1 EP 3896534A1
Authority
EP
European Patent Office
Prior art keywords
layer
head
hand
clockwork
titanium
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.)
Granted
Application number
EP20170046.5A
Other languages
English (en)
French (fr)
Other versions
EP3896534B1 (de
Inventor
Jean-Luc Bucaille
David ECOFFEY
Laurent Guillot
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP20170046.5A priority Critical patent/EP3896534B1/de
Publication of EP3896534A1 publication Critical patent/EP3896534A1/de
Application granted granted Critical
Publication of EP3896534B1 publication Critical patent/EP3896534B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B19/04—Hands; Discs with a single mark or the like
    • G04B19/042—Construction and manufacture of the hands; arrangements for increasing reading accuracy

Definitions

  • the present invention relates to a partly transparent clockwork hand and its manufacturing process.
  • a clockwork hand comprises a center or head serving for its attachment to a shaft, generally by means of a barrel, and a body extending radially from the head and being able to end in a point.
  • Watch hands are generally opaque in order to be clearly visible and fulfill their display function in conjunction with a graduation on the dial. However, there are hands which are transparent except on one end part of their body so as not to interfere with the reading of information contained in other areas of the dial.
  • the patent application FR 2867285 and the utility model DE 29 604 580 U1 for example, provide needles made of transparent material of which only one end part, constituting the indicator part, is colored.
  • the patent FROM 822293 describes needles comprising a body of transparent material and an attached metal tip, the head possibly being in a transparent material or in attached metal.
  • the present invention aims to provide a partly transparent clockwork hand whose manufacturing quality and aesthetics can be excellent without it being necessary to multiply the finishing operations.
  • a hand 1 for a timepiece such as a wristwatch or a pocket watch, which may be an indicator hand for hours, minutes, date, a chronograph hand, etc.
  • the needle 1 includes a needle structure and coatings formed on the needle structure.
  • the needle structure is made entirely of transparent material, integrally, and comprises a circular head 2 and a body 3 extending radially from the periphery of the head 2.
  • the transparent material is typically mineral glass, glass. organic or sapphire, preferably tempered mineral glass.
  • the head 2 has an axis hole 4 capable of accommodating a barrel 5 intended to be driven out on a needle axis.
  • the barrel 5 is typically metallic.
  • the body 3 comprises a rod 6 and a distal end portion 7 of generally rectangular shape transverse to the rod 6.
  • the body 3 could nevertheless be in the form of a rod from one end to the other, the rod being able to or not be tapered and may or may not be terminated by a point.
  • the term “upper surface” is understood to mean the surface which is visible through the crystal when the hand 1 is mounted in the timepiece.
  • the material of the first layer 8 is preferably titanium, titanium oxide or a titanium alloy such as titanium-tungsten, more preferably titanium.
  • the thickness of this layer 8 is advantageously at least 50 nm and preferably at least 70 nm.
  • the first layer 8 is covered with a color layer 9 formed of a paint, a lacquer or a varnish having its own color.
  • the distal end part 7 constitutes the indicator part of the needle 1 intended to display information in conjunction with a graduation of a dial.
  • the color of the layer 9 is preferably a bright color making the information easier to read.
  • the first layer 8 has two distinct functions.
  • a first function consists in making the head 2 opaque or almost opaque in order to hide unsightly elements located below it.
  • the unsightly elements to be concealed are for example glue or solder applied between a shoulder 10 of the barrel and the lower surface 11 of the head 2 in order to fix the needle 1 to the barrel 5, and / or fixing elements of the barrel. other needles mounted below the needle 1.
  • a second function of the first layer 8 is to serve as a tie layer improving the adhesion of the color layer 9 to the needle structure. Titanium is the preferred material for the first layer 8 because it withstands long exposure to ambient air without losing its effectiveness. This option gives in particular the possibility of delaying for several days, if necessary, the application of paint, lacquer or varnish.
  • the needle structure 2, 3 is first produced by engraving, by 3D printing, by laser exposure and chemical etching (Selective Laser Etching) or by any other suitable technique. Then, the first layer 8 is deposited simultaneously on the upper surface of the distal end part 7 and on the upper surface of the head 2, typically by PVD (physical vapor deposition) or CVD (chemical vapor deposition). . During this operation, the upper surface of the rod 6 is protected, for example by means of a mask, so as not to receive the layer 8, the mask then being removed or eliminated. Finally, the color layer 9 is applied to the part of the first layer 8 located on the distal end part 7. The step of applying the color layer 9 can be carried out using any technique which those skilled in the art will deem adequate, for example spraying, tempering, brushing, etc.
  • the needle 1 thus manufactured can be glued or brazed by the lower surface 11 of the head 2 on the shoulder 10 of the barrel 5.
  • EP 3309624 employing a multilayer metal coating on the lower surface 11 of the head 2 can be implemented.
  • a metallic layer is deposited between the first layer 8 and the color layer 9 and possibly also on the part of the first layer 8 situated on the head 2.
  • the metal of this metallic layer can be chosen. among the noble metals or the platinoids, as well as their alloys. These include gold, ruthenium, rhodium, palladium, osmium, iridium and platinum.
  • the metal of this metallic layer is advantageously gold.
  • This intermediate metallic layer between the first layer 8 and the color layer 9 can have an interesting aesthetic effect on the color layer 9, such as improving the shine or the tint.
  • a gold layer deposited by PVD or CVD on a first titanium layer 8 will allow the color layer 9 to have more shine.
  • the color layer 9 may only partially cover the first layer 8 on the distal end part 7. Such an implementation allows to play with the covering surfaces of the first layer 8, with a possible metal layer. intermediate and of the color layer 9 in order to allow different layers of color to appear and thus to create shapes and / or borders.
  • the needle according to the invention is particularly suitable for quality manufacture with a minimum of operations, a single step being necessary to hide the glue or solder under the head 2 and to improve the adhesion of the head. the color layer 9.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adornments (AREA)
EP20170046.5A 2020-04-17 2020-04-17 Teilweise transparenter uhrzeiger und sein herstellungsverfahren Active EP3896534B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20170046.5A EP3896534B1 (de) 2020-04-17 2020-04-17 Teilweise transparenter uhrzeiger und sein herstellungsverfahren

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20170046.5A EP3896534B1 (de) 2020-04-17 2020-04-17 Teilweise transparenter uhrzeiger und sein herstellungsverfahren

Publications (2)

Publication Number Publication Date
EP3896534A1 true EP3896534A1 (de) 2021-10-20
EP3896534B1 EP3896534B1 (de) 2022-11-09

Family

ID=70295003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20170046.5A Active EP3896534B1 (de) 2020-04-17 2020-04-17 Teilweise transparenter uhrzeiger und sein herstellungsverfahren

Country Status (1)

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EP (1) EP3896534B1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE822293C (de) 1949-07-16 1951-11-26 Uhrenfabriken Gebrueder Jungha Zeiger fuer Zeitmesser u. dgl.
JPS5333468U (de) * 1976-08-30 1978-03-23
DE29604580U1 (de) 1996-03-12 1997-05-15 Liauw Ek Tjien Kalender-Uhr mit 3 Zeigern, die durch 3 Ringe am Ende die Datumsziffer, den Monat und den Tag zeigen; das Zifferblatt ist in 3 Kreisen eingeteilt für Tag, Monat, Datum
JP2004279382A (ja) * 2003-03-19 2004-10-07 Citizen Watch Co Ltd 装飾軽量指針およびその製造方法
FR2867285A1 (fr) 2004-03-03 2005-09-09 Benoit Espiau Montre
EP3309624A1 (de) 2016-10-13 2018-04-18 Patek Philippe SA Genève Montageverfahren für uhrenkomponenten

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE822293C (de) 1949-07-16 1951-11-26 Uhrenfabriken Gebrueder Jungha Zeiger fuer Zeitmesser u. dgl.
JPS5333468U (de) * 1976-08-30 1978-03-23
DE29604580U1 (de) 1996-03-12 1997-05-15 Liauw Ek Tjien Kalender-Uhr mit 3 Zeigern, die durch 3 Ringe am Ende die Datumsziffer, den Monat und den Tag zeigen; das Zifferblatt ist in 3 Kreisen eingeteilt für Tag, Monat, Datum
JP2004279382A (ja) * 2003-03-19 2004-10-07 Citizen Watch Co Ltd 装飾軽量指針およびその製造方法
FR2867285A1 (fr) 2004-03-03 2005-09-09 Benoit Espiau Montre
EP3309624A1 (de) 2016-10-13 2018-04-18 Patek Philippe SA Genève Montageverfahren für uhrenkomponenten

Also Published As

Publication number Publication date
EP3896534B1 (de) 2022-11-09

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