GB2031621A - Watch hand - Google Patents
Watch hand Download PDFInfo
- Publication number
- GB2031621A GB2031621A GB7930919A GB7930919A GB2031621A GB 2031621 A GB2031621 A GB 2031621A GB 7930919 A GB7930919 A GB 7930919A GB 7930919 A GB7930919 A GB 7930919A GB 2031621 A GB2031621 A GB 2031621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hand
- metallic layer
- hands
- microns
- thickness
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 44
- 239000010931 gold Substances 0.000 claims abstract description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052737 gold Inorganic materials 0.000 claims abstract description 9
- 239000010935 stainless steel Substances 0.000 claims abstract description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract 14
- 229910052759 nickel Inorganic materials 0.000 claims abstract 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract 5
- 229910052802 copper Inorganic materials 0.000 claims abstract 5
- 238000000034 method Methods 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229910001369 Brass Inorganic materials 0.000 claims description 5
- 239000010951 brass Substances 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 4
- 239000011701 zinc Substances 0.000 claims 4
- 238000007743 anodising Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 14
- 238000005520 cutting process Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910018507 Al—Ni Inorganic materials 0.000 description 1
- 229910017398 Au—Ni Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910002482 Cu–Ni Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910007567 Zn-Ni Inorganic materials 0.000 description 1
- 229910007614 Zn—Ni Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Adornments (AREA)
- Electromechanical Clocks (AREA)
Abstract
A hand for a timepiece is formed in a two-layer construction, from a hard metal which is clad with a soft metal. The hard metal layer permits secure fixing of the hand to a shaft, as by a portion 12, while minimizing the possibility of deformation of the hand during such fixing. The soft metal layer can be easily formed into a desired pattern or be provided with a surface finish to provide an attractive appearance. The hand may thus be as thin as 30-50 microns and may for example be of nickel or stainless steel clad with gold or copper. The hands are blanked from a continuous strip using a diamond- tipped tool. <IMAGE>
Description
SPECIFICATION
Watch hand
Background of the invention
The hands which are used in timepieces are usually formed from relatively hard and resilient metals such as brass or phosphor bronze. However, such a metal is not sufficiently hard to prevent deformation occurring in the hand when it is push-fitted onto a shaft of the timepiece whereby it is to be rotated. Such deformation is particularly noticable in very thin hands which are used in wristwatches, which may be as thin as 100 microns or less. However, if it is attempted to improve this defect by utilizing a harder metal for the hands, the problem arises of providing an attractive appearance of the hand, by means of, for example cutting a pattern into the visible surface of the hand, or providing some form of surface finish.Cutting of such patterns in a very hard metal is of course possible, but is expensive and difficult to implement in a economical manner on a large scale production basis. This is expecially important at present, due to the increasing demand for smaller and thinner timepieces, which must incorporate thinner hands, with attractive patterns of conventional or novel design provided on the hands. Such problems are difficult to overcome by conventional methods of producing hands for timepieces.
With the present invention, such problems are overcome by making the hands of a two-layer construction.
One of the layers consists of a hard metal, which will not be easily deformed by the process of pushfitting the hand onto a shaft, so that warping or twisting of the hand due to this cause will be prevented. The second layer consists of a soft metal clad onto the hard metal. The soft metal can be easily cut into a desired pattern, and can be selected so as to be suitable for any of a variety of methods of surface processing, to provide a hand having a desired appearance. With the present invention, in fact, it is possible to utilize gold as the soft metal, in which case of course no surface treatment would normally be utilized.In addition, it is possible to use a metal such as stainless steel as the hard metal, in which case is would not be necessary to protect the hard metal layer from any adverse effects caused by any surface processing of the soft metal layer. It will therefore be appreciated that the present invention will enable hands of extremely small size for timepieces to be produced, in a simple and effective manner.
Summary ofthe invention
According to the present invention, there is provided a hand for a timepiece, comprising an integral two-layer combination of a relatively hard metallic layer and a relatively soft metallic layer clad on said relatively hard metallic layer.
Brief description of the drawings
In the drawings:
Figure 1A and Figure 1B show a minutes hand constructed in accordance with the present invention, in plan and in sectional elevation, respectively;
Figure 2A and 2B show an hours hand constructed in accordance with the present invention, in plan and in sectional elevation, respectively;
Figure 3A and Figure 3B show a seconds hand constructed in accordance with the present invention, in plan and in sectional elevation, respectively;
Figure 4 shows the metallic layers of a timepiece hand in accordance with the present invention;
Figure 5shows a step in the process of manufacturing hands on a continuous basis, using a diamond cutting tool;
Figure 6 is an enlarged cross-sectional view of a blank for a hand after cutting;
Figure 7 is a diagram of a band of blanks after cutting has been performed;;
Figure 8 illustrates a step of cutting patterns in the hands;
Figure 9 illustrates the step of lapping a hand;
Figure 10 illustrates warping of a minutes hand or hours hand of conventional design, due to mounting on the timepiece movement;
Figure 11 illustrates a prior art method of mounting a seconds hand by using an intermediate tubular member;
Figure 12 illustrates warping of a seconds hand due to mounting by the conventional method of using an intermediate tubular member;
Figure 13 illustrates warping of a minutes hand or hours hand which has been finished by a prior art method;
Figure 14 illustrates a cross-sectional view of a hand according to the present invention, after finishing; and
Figure 15 is a cross-sectional view of a seconds hand according to the present invention, after finishing.
Description of the preferred embodiments
Figure 1A and Figure 1 B show an embodiment of a minutes hand according to the present invention, in plan and in sectional elevation, respectively. Figures 2A and 2B show an hours hand according to the present invention, in plan and sectional elevation, and Figures 3A and 3B show a seconds hand according to the present invention, in plan and sectional elevation. Each of such hands can be manufactured from a continuous band of metal which consists of a layer of soft metal clad on a layer of hard metal. Numerals 10 and 12 in Figure 1 B and 2B denote a hand portion and tubular portion, respectively. Figure 4 illustrates a band of metal from which these hands can be manufactured on a continuous basis. Numeral 16 denotes a layer of soft metal, which is clad on a layer of hard metal 18.The soft metal layer 16 enables various patterns to be formed on the visible side of the hand, or can be provided with some desired surface finish. The layer of hard metal 18 enables the hand to be securely mounted, by push-fitting or other means, since it is not easily deformed and thus provides a high fixing force. Since the hard metal layer 18 can be made from a metal which is highly resilient as well as being hard, warping or permanent undesirable deformation of the hand, due to forces exerted on the hand when it is mounted on the timepiece movement, can be eliminated. Such a hard, resilient metal would be extremely difficu It to cut to a desired surface pattern. This function is therefore provided by the layer of soft metal 16, which is easily deformed and so can easily be cut into any pattern.The use of such a two-layer construction also eliminates any warping or other undesirable deformation of the hand which can occur during the shaping of a conventional type of hand by, for example press-forming, or which can occur when a pattern is formed upon such a conventional type of hand by such means as stamping, cutting with a diamond-tipped tool, etc.
Figure 4 illustrates a step in the manufacture of timepiece hands according to the present invention.
Numeral 20 denotes a continuous band, which is made up of a hard metal layer and a soft metal layer as illustrated in Figure 4. Blanks of hands, denoted by numeral 26, are cut out of the band 20 at regular intervals by means of diamond-tipped cutting tools 24, the tips of which are indicated by reference numeral 22.
Figure 6 illustrates in enlarged cross-sectional view one of the blanks of hands which are cut as shown in FigureS. The cut surfaces of the hand 26 are indicated by numerals 28.
Figure 7 illustrates the metal band 20 of Figure 5, in plan view.
The blanks of hands, which have been formed as shown in Figures 5 to 7, are then attached to the periphery of a disk 32 as shown in Figure 8, and this disk is rotated. The blanks of hands 26 are then cut to a desired pattern by means of a cutting tool 36.
After the pattern has been cut into the soft metal layer of each hand, lapping is performed as shown in
Figure 9. This lapping is performed on the blanks for the seconds hands. Reference numerals 38, 40 and 42 denote a weight, a seconds hand and a lapping machine, respectively.
In order to clarify the advantages provided by timepiece hands which are manufactured according to the present invention, as described above, defects which can be produced in hands manufactured by prior art methods will be described. Referring first to Figure 10, a hand of relatively thin cross-section, which may be a minutes hand or an hours hand, is denoted by numeral 10. When such a hand is mounted on a timepiece movement, by being forcibly push-fitted onto a shaft of the movement, then 6 deformation of the hand occurs due to the forces exerted on the hand. The nature and amount of this deformation is indicated by the letter din Figure 10. This deformation results in a decrease in the fixing force by which the hand is attached to the shaft of the timepiece movement.Over a long period of time, this reduction in fixing force can result in the hand becoming loosened, and therefore failing to be rotated by the timepiece movement, or being rotated only intermittently. As is indicated by the broken-line outline in Figure 10, the hand can be shaped in such a way as to increase the fixing force after it is forcibly pushed onto a shaft of the timepiece. Such shaping, and the force-fitting of the hand, can be done using a jig. However, although such a method provides an increase in the initial fixing force acting on the hand, it has been found, through observation over a long period of time, that the fixing force gradually decreases. In addition, the shaping of the hands which is involved in this method, as indicated by the broken-line outline in Figure 10, results in an impairment of the appearance of the hand.
Figure 11 shows a prior art method of attacheing a tubular member 14to the seconds hand 10 of a timepiece, by using a form of rivetting. This is done by forcing a rivetting tool 46 into the center of the tubular member 14, causing tubular member 14 to thereby be slightly expanded. However, this expansion results in a buckling and distortion of the portion of seconds hand 10 adjacent to the tubular member 14, as illustrated in Figure 12, thereby impairing the appearance of the timepiece. A buckled portion of the seconds hand is indicated by numeral 16 in Figure 12.
Figure 13 illustrates a warping of a minutes hand or hours hand of conventional design, due to the effects of pressing, pattern formation, or finishing operations. The amount of warping caused by these operations is indicated by the letter fin Figure 13. Generally speaking, it can be expected that the magnitude of such warping of the hand will increase as the thickness of the hand is decreased, in the case of a hand made in accordance with conventional methods.
Various embodiments of timepiece hands according to the present invention which have been actually produced will now be described. Figure 14 is a cross-sectional view of part of a minutes hand or hours hand, which is applicable to all of the embodiments of the present invention described in the following. Figure 15 is a cross-sectional view of part of a seconds hand, which is applicable to all of the embodiments described below. A first group of four embodiments was produced in which the minutes hand and hours hand were of 50 to 100 microns thickness, while the seconds hand was of 30 to 50 microns thickness. Numeral 19 in Figure 14 denotes a plated thin metallic layer of finishing material which was applied to each of these first embodiments. The combinations of materials used in the first group of embodiments were as follows, in which the first material denotes the soft metallic layer (i.e. layer 16 in Figure 14, while the second material denotes the hard metallic layer (i.e. layer 18 in Figure 14), in each case: (1)BS-Ni (2)BS-SS (3) Cu-Ni (4)Cu-SS The appended Table 1 shows the relationships between the metallic layers used in the first group of embodiments described above and the optimum thicknesses found for these layers, in the case of the minutes hands and hours hands. Table 3 provides the same information, in the case of the seconds hands.
It was found that timepiece hands according to these embodiments of the present invention could be produced with a thickness of 50 to 100 microns (in the case of minutes hands and hours hands) and 30 to 50 microns (in the case of seconds hands, and that these extremely thin hands could be produced and mounted using conventional methods and equipment. The preferred embodiments of the present invention in this first group consisted of category 1 of Table 1 (BS or Cu clad on Ni or SS) for the minutes and hours hands, and category 1 in Table 3 )bs or Cu clad on Ni or SS) for the seconds hand.
A second group of embodiments of the present invention were produced in which various colors were provided on the hands by means of anodic oxidization, the hours and minutes hands having a thickness of 50 to 100 microns and the seconds hand having a thickness of 30 to 50 microns. The combinations of materials used in the second group of embodiments were as follows, in which the first material denotes the soft metallic layer and the second material denotes the hard metallic layer, in each case: (1)Al-SS (2)Al-Ni (3)Zn-SS (4) Zn-Ni
The preferred embodiments of the present invention in this second group consisted of category 2 of Table 1 (Al or Zn clad on SS) for the hours and minutes hands, and category 2 of Table 3 (Al or Zn clad on SS) for the seconds hand.
Timepiece hands produced according to the second embodiments of the present invention can be easily colored to a desired tone by anodic oxidation, and this color is stable, due to the use of a suitable material as the metallic layer 16. With conventional hands using such materials as BS, such coloration by anodic oxidation is unstable, and a high degree of uniformity of coloration cannot be obtained. In addition, the use of stainless steel as the hard metallic layer ensures that no protective means need be applied to this layer during the anodic oxidation process. Thus, the present invention enables timepiece hands to be produced on a mass production basis with a stable coloration provided by chemical means, and such hands can have a thickness of the order of 50 to 100 microns for the hours and minutes hands and 30 to 50 microns for the seconds hands.Using a two-layer metallic band from which to cut out blanks for hands according to the present invention, all of the steps in producing such hands can be performed utilizing conventional methods and equipment.
In a third embodiment of the present invention, hands were produced in which the soft metallic layer consisted of gold. The thickness of the hands thus produced were 50 to 100 microns for the hours and minutes hands and 30 to 50 microns for the seconds hands. By this utilizing gold as the soft metallic layer, which is visible when the hand is mounted in a timepiece, the step of plating the hands to provide a more attractive surface finish can be eliminated. Two combinations of metallic layers used in this third embodiment are as follows:
(1)Au-Ni (2)Au-SS The relative thicknesses of the metallic layers in the third embodiment are indicated as category 3 in Table 3, for the seconds hand, and in Table 2, for the hours and minutes hands.
It should be noted that the use of gold as the soft metallic layer in a hand made according to the present invention enables the appearance of the hands to be improved by providing a more sharply defined shape, as well as eliminating the need for plating of the hands. These advantages are obtained without the need for modifying the various manufacturing steps which have been used hitherto in producing such timepiece hands.
From the foregoing, it will be appreciated that the present invention enables hands which are of extremely thin shape to be produced, without making it necessary to modify a production sequence which has been previously used in manufacturing timepiece hands of conventional type. Hands which are produced according to the present invention can have a thickness of the order of 50 to 100 microns for a minutes or hours hand, and 30 to 50 microns for a seconds hand. Such extremely thin hands can be produced according to the present invention without the danger of warping or other deformation being caused by the process of cutting and shaping the hands, or in the step of mounting the hands on a timepiece movement.In addition, any desired pattern can be cut, or any desired surface finish applied to, a timepiece hand according to the present invention, by suitable selection of the material for the soft metallic layer.
Although the present invention has been shown and described according to specific embodiments, it should be noted that various modifications to these embodiments are posible, which fall within the scope claimed for the present invention. For example, although specific materials have been specified as the metallic layers in the preferred embodiments, it is also possible to utilize various alloys of these metals. In addition, the relative thicknesses of the metallic layers can be varied with respect to the proportions which have been specified for the described embodiments.
TABLE 1
Clad Material Hand Thickness
1 2 50 11 100 F BS or Cu Al or Zn 30 ffi 80-50 > Ni or SS SS 20 ,u 20 - 50 p TABLE 2
Clad Material Hand Thickness
3 50 11 100 CL Au 20 Ir 20 Fa Ni or SS 30 11 80 11 TABLE 3
Clad Material Hand Thickness
1 2 3 30 11 50 pt BS or Cu Al or Zn Au 10 11 20 Fa NI or SS SS Ni or SS 20 R 30 ;
Claims (11)
1. A hand for a timepiece, comprising an integral two-layer combination of a relatively hard metallic layer and a relatively soft metallic layer clad on said relatively hard metallic layer.
2. A hand for a timepiece according to claim 1, in which said relatively soft metallic layer comprises a metal selected from a group consisting of brass, copper, zinc, aluminum, gold and alloys thereof.
3. A hand for a timepiece according to claim 1, in which said relatively hard metallic layer comprises a metal selected from a group consisting of stainless steel, nickel, and alloys thereof.
4. A hand for a timepiece according to claim 1, and further comprising a plated metallic layer formed on an external surface of said soft metallic layer by a plating technique, said plated metallic layer having a thickness which is substantially smaller than that of said soft metallic layer and said hard metallic layer.
5. A hand for a timepiece according to claim 1, wherein said soft metallic layer in subjected to an anodizing technique to thereby provide a desired coloration of an external surface thereof.
6. A hand for a timepiece according to claim 1, wherein said soft metallic layer is formed from a metal which is selected from a group consisting of brass, copper, aluminum and zinc and alloys thereof having a thickness of approximately 30 microns and wherein said hard metallic layer is formed from a metal selected from a group consisting of stainless steel, nickel and alloys thereof having a thickness of approximately 20 microns.
7. A hand for a timepiece according to claim 1, wherein said soft metallic layer is formed from a metal selected from a group consisting of brass, copper, aluminum and zinc and alloys thereof having a thickness which is in the range 80 to 50 microns approximately, and wherein said hard metallic layer is formed from a metal selected from a group consisting of nickel, stainless steel and alloys thereof having a thickness approximately in the range 20 to 50 microns.
8. A hand for a timepiece according to claim 1, wherein said soft metallic layer comprises a gold layer of 20 microns thickness approximately and said hard metallic layer is formed from a metal selected from a group consisting of nickel, stainless steel and alloys thereof of thickness approximately 30 microns.
9. A hand for a timepiece according to claim 1, wherein said soft metallic layer comprises a gold layer of 20 microns thickness approximately, and said hard metallic layer is formed from a metal selected from a group consisting of nickel, stainless steel and alloys thereof of thickness approximately 80 microns.
10. A hand for a timepiece according to claim 1 ,wherein said soft metallic layer comprises a metal
selected from a group consisting of brass, copper, aluminum, zinc and gold, having a thickness of
approximately 10 microns, and wherein said hard metallic layer comprises a metal selected from a group
consisting of nickel and stainless steel, and alloys thereof, having a thickness of approximately 20 microns.
11. A hand for a timepiece substantially as shown and described with reference to the accompanying
drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11053878A JPS5537915A (en) | 1978-09-08 | 1978-09-08 | Pointer for clock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2031621A true GB2031621A (en) | 1980-04-23 |
| GB2031621B GB2031621B (en) | 1982-08-18 |
Family
ID=14538343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7930919A Expired GB2031621B (en) | 1978-09-08 | 1979-09-06 | Watch hand |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5537915A (en) |
| DE (1) | DE2936310C2 (en) |
| GB (1) | GB2031621B (en) |
| HK (1) | HK54784A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH685964GA3 (en) * | 1992-04-28 | 1995-11-30 | Citizen Watch Co Ltd | Hands for a watch and method for its manufacture. |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740669A (en) * | 1980-08-25 | 1982-03-06 | Citizen Watch Co Ltd | Watch hand and manuacture thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1086634B (en) * | 1957-01-08 | 1960-08-04 | Fluckiger & Cie | Method for manufacturing hands, in particular for clocks |
-
1978
- 1978-09-08 JP JP11053878A patent/JPS5537915A/en active Pending
-
1979
- 1979-09-06 GB GB7930919A patent/GB2031621B/en not_active Expired
- 1979-09-07 DE DE19792936310 patent/DE2936310C2/en not_active Expired
-
1984
- 1984-07-12 HK HK54784A patent/HK54784A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH685964GA3 (en) * | 1992-04-28 | 1995-11-30 | Citizen Watch Co Ltd | Hands for a watch and method for its manufacture. |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2031621B (en) | 1982-08-18 |
| DE2936310A1 (en) | 1980-03-20 |
| DE2936310C2 (en) | 1986-11-27 |
| JPS5537915A (en) | 1980-03-17 |
| HK54784A (en) | 1984-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5914754B2 (en) | Watch brazed bimetal exterior parts | |
| EP1146136B1 (en) | Ornament and method for preparation thereof | |
| GB2031621A (en) | Watch hand | |
| US4371429A (en) | Timepiece hand manufacturing method | |
| US2080750A (en) | Method of making bearings | |
| CN110231764B (en) | Method for manufacturing diamond-polished setting block for timepiece | |
| US6905758B1 (en) | Decorative item and process for producing the same | |
| US20170261935A1 (en) | Economical timepiece display component | |
| JP2025518280A (en) | How to decorate watch parts | |
| JP3192215B2 (en) | Clock hands and methods of making them | |
| JP2024043487A (en) | Method of manufacturing an outer component with a diffraction grating | |
| GB2099193A (en) | Method of making hands for a timepiece | |
| CN111694260A (en) | Composite part for a timepiece or piece of jewellery with a ceramic structure and an insert | |
| WO2004016450A1 (en) | Method for the production of coins or tokens and coins or tokens thus obtained | |
| JP4561174B2 (en) | Jewelery, method of attaching decorative body to jewelry, timepiece and method of attaching decorative body to watch | |
| JPH07104075A (en) | Manufacture of multi-needle dial for wrist watch | |
| JP2003247096A (en) | Method for producing plant material and clock | |
| JP3150803B2 (en) | Timeless character for a clock dial, a method of manufacturing the same, and a clock dial using the same | |
| JPS6140945B2 (en) | ||
| JPH01178337A (en) | Manufacture of needle for timepiece | |
| HK40013786B (en) | Method for fabricating diamond-polished appliques for horology | |
| HK40013786A (en) | Method for fabricating diamond-polished appliques for horology | |
| HK40116294A (en) | Method for decorating a timepiece component | |
| JPS6091284A (en) | Typesetting for clock dial face | |
| JPH01317645A (en) | Manufacturing method for watch hands |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |