US3251124A - Method for producing a clockwork dial provided with projecting symbols - Google Patents

Method for producing a clockwork dial provided with projecting symbols Download PDF

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US3251124A
US3251124A US121502A US12150261A US3251124A US 3251124 A US3251124 A US 3251124A US 121502 A US121502 A US 121502A US 12150261 A US12150261 A US 12150261A US 3251124 A US3251124 A US 3251124A
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indicia
dial
carrier
symbols
relative positions
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US121502A
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Vogt Andre
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • 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
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0043—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0048—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms for dials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49579—Watch or clock making
    • Y10T29/49583—Watch or clock making having indicia, face, or dial
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate material

Definitions

  • dial plates of an electrolytic material the grade of which is however lower than that of stamped plates. Furthermore, it is not possible to provide signs indicia or symbols made of solid gold without this leading to the production of dials also made of gold, or else, Without resorting to an amount of gold which is much larger than that actually required for the formation of gold symbols alone.
  • a mold is produced inside which the impressions corresponding to the symbols or indicia are provided and through which a conductive member is inserted across the bottom surfaces of said irnpressions and, this being done, the surface of the impressions is rendered electrically conductive, the symbols are produced through an electrodeposition method, the mold is removed and the symbols are secured to the dial plate.
  • FIGS. 1 to 9 of said drawing illustrate diagrammatically the main successive stages of said method.
  • I begin by producing a mold 1 of plastic material (FIG. 1), for example of polyethylene, polystyrol, polyvinyl-chlorine or epoxydrosin, of which the upper section is provided with impressions for the formation of the symbols which it is desired to lay on a dial.
  • plastic material for example of polyethylene, polystyrol, polyvinyl-chlorine or epoxydrosin, of which the upper section is provided with impressions for the formation of the symbols which it is desired to lay on a dial.
  • Mold 1 carries a conductive member 2 embedded inside it and forming the'bottom of impressions, said conductive member being constituted, for instance, by an old dial.
  • the impressions are obtained by means of a member 3 inserted, for instance, inside the mold of an injection molding apparatus, not shown, into which the plastic material forming the mold is to be injected. It being understood the mold is made with the member 2 in position in the die of the injection molding apparatus.
  • the surface of the mold (FIG. 2) is first coated with a thin layer of conductive material 4, say a copper layer, obtained through vacuum deposition and which has for its result an electric interconnection between the impressions and the conductive member 2.
  • conductive material say a copper layer
  • metals such as gold or silver can be used.
  • this layer is removed from the upper surface of the mold so as to allow only that section of the layer which lines the impressions to remain in position.
  • the mold is then dipped into an electrolytic bath, so as to form the symbols 5 by a filling, by electro-deposition, of the impressions, for instance by means of gold (FIG. 3).
  • the latter is deposited only inside the recesses, since only these are then conductive.
  • the upper surface of the symbols is finished oil by a surfacing by means of a diamond or by polishing (FIG. 4), after which the finished symbols are protected by means of a copper layer 6, for instance, which is obtained electrolytically (FIG. 5).
  • Said protecting layer has a thickness such,-say A of a mm., which ensures a proper protection of said symbols.
  • Known means for instance a welding through a resistance, or a welding by means of supersonic waves, soldering, gluing or the like, are then resorted to for securing over the protecting layer 6 a support 7 which may be constituted, for instance, by a metal ring or plate.
  • the mold 1 is finally removed by melting or by chem- '(b) Polystyr0l-is soluble in the above-mentioned solvents, and is also soluble in benzene. Moreover, it
  • P0lyethylene is, for example, soluble in hydrocarbons at temperatures above 65 C. It melts at temperatures above 90 to C.
  • the upper surface of the dial plate may, of course, be entirely finished, that is, it may have been previously subjected to the usual finishing operations and, in particular, to the conventional electrolytic treatment.
  • My improved method is particularly economical since it allows obtaining dials carrying projecting symbols which are made, for instance, of gold, while resorting only to the amount of gold which is strictly required for their execution. This is ascribable chiefly to the presence of the lead 2 embedded in the mold and subsequently removed.
  • the dial plate may be obtained through any conventional means, for instance, through stamping.
  • the symbols, as also the dial plate can be finished independently of one another and the operations on the dial plate cannot damage the symbols and vice versa.
  • the symbols may also be obtained separately for instance, through an electrolytic deposit of metal in a mold as before described where the dial to be used for fixing indicia thereon functions as the conductive member 2.
  • a method for manufacturing a clockwork dial having indicia thereon in relief comprising, providinga dial having a major face to which indicia are to be secured and a form, forming the indicia simultaneously in spaced relative positions in said form corresponding to spaced as relative positions in which said indicia are to be fixed relative to each other on said major face of said dial with an area of each such indicia exposed, attaching a rigid carrier to said area of each such indicia to maintain said indicia in said relative positions upon removal of said form, removing said form from said indicia, positioning said carrier and indicia attached thereto in position with said indicia between the dial and carrier with said indicia in contact with said major face of said dial to which said indicia are to be secured, permanently securing the indicia on said dial in said relative positions, and removing said carrier.
  • a method for manufacturing a clockwork dial having indicia thereon in relief comprising, providing a dial having a major face to which indicia are to be secured and a form having spaced form cavities thereon, coating only the inner surface of said cavities with a conductive coating and providing an internal current flow path to said inner surfaces, depositing metal only in said cavities by electrodeposition for forming the indicia in spaced relative positions in which said indicia are to be fixed relative to each other on said major face of said dial with an area of each such indicia exposed, attaching a rigid carrier to said area of each such indicia to maintain said indicia in said relative positions upon removal of said form, removing said form from said indicia, positioning said carrier and indicia attached thereto. in position with said indicia between the dial and carrier with said indicia in contact with said major face of said dial to which said indicia are to be secured, permanently securing the indicia on said dial in said relative positions, and removing said carrier.
  • a method for manufacturing a clockwork dial having indicia thereon in relief comprising, providing a dial having a major face to Which indicia are to be permanently secured, providing a dissolvable form having cavities therein for forming the indicia, the cavities being electrically connected internally of the mold rendering the inner surfaces of said cavities electrically conductive, depositing material in said cavities only during application of electrical current to said cavity inner surfaces to form said indicia, said cavities being disposed spaced relative to each other in position corresponding to the spaced relative positions said indicia are to occupy relative to each other when secured to said dial, attaching a rigid carrier to all of said indicia subsequent to the deposition thereof to hold said indicia in fixed relative positions upon removal of said form, dissolving the form to free the indicia therefrom, positioning the carrier for securing the indicia on said dial, permanently securing said indicia on said dial, and removing the carrier from said indicia so that the indicia remain fixed in position on said
  • a method for manufacturing a clockwork dial having indicia thereon in relief comprising, providing a dial having a major face to which indicia are to be permanently secured, providing a dissolvable form having cavities therein for forming the indicia, the cavities being electrically connected internally of the mold rendering the inner surfaces of said cavities electrically conductive, depositing material in said cavities only during application of electrical current to said cavity inner surfaces to form said indicia, said cavities being disposed spaced relative to each other in position corresponding to the spaced relative positions said indicia are to occupy relative to each other when secured to said dial, attaching a rigid conductive carrier to all of said indicia subsequent to the deposition thereof to hold said indicia in fixed relative positions upon removal of said form, dissolving the form to free the indicia therefrom, positioning the carrier with indicia thereon in position relative to said major face of the dial for securing the indicia on said dial, applying welding current to said dial and carrier for permanently securing said indicia
  • a method for manufacturing a clockwork dial having indicia thereon in relief comprising, providing a dial having a major face to which indicia are to be permanently secured, providing a dissolvable form having cavities therein for forming the indicia, the cavities being electrically connected internally of the form rendering the inner surfaces of said cavities electrically conductive, depositing material in said cavities only during application of electrical current to said cavity inner surfaces to form said indicia, said cavities being disposed spaced relative to each other in position corresponding to the spaced relative positions said indicia are to occupy relative to each other when secured to said dial, applying a protective coating to an exposed end of said indicia in said cavities, prior to applying said coating finishing surfaces on said indicia on which said coating is applied, attaching a rigid carrier to all of said indicia over said coating subsequent to the deposition thereof to hold said indicia in fixed relative positions upon removal of said form, dissolving the form to free the indicia therefrom, positioning the carrier with indicia thereon in

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Electrotherapy Devices (AREA)

Description

May 17, 1966 voe'r 3,251,124
METHOD FOR PR CING A CLOCKWORK DIAL PROVIDED WITH PROJECTI SYMBOLS Filed July 5, l
FIG. 9
United States Patent 3,251,124 METHOD FOR PRODUCING A CLOCKWORK DIAL PROVIDED WITH PROJECTING SYMBOLS Andr Vogt, 63 Rue Jacob Brandt, L'a Chaux-de-Fonds, Switzerland Filed July 3, 1961, Ser. No. 121,502 Claims priority, application Switzerland, July 4, 1960, 7,613/ 60 Claims. (Cl. 29--177) Various methods for producing clockwork dials provided with projecting symbols are already known, according to which the dial plate and the symbols are obtained through galvanoplastic means starting from a mold of insulating material, the surfaces of which are made conductive through metallizat-ion. The metallized layer may be removed at the end of the operation, or else, it may be retained for giving a color to the dial or to the symbols.
There are obtained thus dial plates of an electrolytic material, the grade of which is however lower than that of stamped plates. Furthermore, it is not possible to provide signs indicia or symbols made of solid gold without this leading to the production of dials also made of gold, or else, Without resorting to an amount of gold which is much larger than that actually required for the formation of gold symbols alone.
My improved method allows executing clockwork dials which do not show such drawbacks.
According to my invention, a mold is produced inside which the impressions corresponding to the symbols or indicia are provided and through which a conductive member is inserted across the bottom surfaces of said irnpressions and, this being done, the surface of the impressions is rendered electrically conductive, the symbols are produced through an electrodeposition method, the mold is removed and the symbols are secured to the dial plate.
The accompanying drawing illustrates an embodiment of my invention, showing how this method may be executed.
FIGS. 1 to 9 of said drawing illustrate diagrammatically the main successive stages of said method.
According to said method, I begin by producing a mold 1 of plastic material (FIG. 1), for example of polyethylene, polystyrol, polyvinyl-chlorine or epoxydrosin, of which the upper section is provided with impressions for the formation of the symbols which it is desired to lay on a dial.
Mold 1 carries a conductive member 2 embedded inside it and forming the'bottom of impressions, said conductive member being constituted, for instance, by an old dial. The impressions are obtained by means of a member 3 inserted, for instance, inside the mold of an injection molding apparatus, not shown, into which the plastic material forming the mold is to be injected. It being understood the mold is made with the member 2 in position in the die of the injection molding apparatus.
The surface of the mold (FIG. 2) is first coated with a thin layer of conductive material 4, say a copper layer, obtained through vacuum deposition and which has for its result an electric interconnection between the impressions and the conductive member 2. Of course, metals such as gold or silver can be used.
By means of a slight operation on a milling machine, for instance, this layer is removed from the upper surface of the mold so as to allow only that section of the layer which lines the impressions to remain in position. The mold is then dipped into an electrolytic bath, so as to form the symbols 5 by a filling, by electro-deposition, of the impressions, for instance by means of gold (FIG. 3). The latter is deposited only inside the recesses, since only these are then conductive.
ICC
This being done, the upper surface of the symbols is finished oil by a surfacing by means of a diamond or by polishing (FIG. 4), after which the finished symbols are protected by means of a copper layer 6, for instance, which is obtained electrolytically (FIG. 5).
Said protecting layer has a thickness such,-say A of a mm., which ensures a proper protection of said symbols.
Known means, for instance a welding through a resistance, or a welding by means of supersonic waves, soldering, gluing or the like, are then resorted to for securing over the protecting layer 6 a support 7 which may be constituted, for instance, by a metal ring or plate.
The mold 1 is finally removed by melting or by chem- '(b) Polystyr0l-is soluble in the above-mentioned solvents, and is also soluble in benzene. Moreover, it
melts at temperatures above to C.
(c) P0lyethyleneis, for example, soluble in hydrocarbons at temperatures above 65 C. It melts at temperatures above 90 to C.
Further means also known per se and preferably a resistance welding or a supersonic welding, allow securing finally the symbols 5 onto a dial plate 8. The support or carrier 7 is then removed together with the projecting layer carried by it, so as to provide for the appearance to view of the finished symbols which the difierent securing operations cannot damage by reason of the protecting layer 6 coating their parts subjected to such operations. The removal of the support 7 may be obtained through a series of well-known means, say' through electrolysis or through dissolution by an acid.
The upper surface of the dial plate, may, of course, be entirely finished, that is, it may have been previously subjected to the usual finishing operations and, in particular, to the conventional electrolytic treatment.
My improved method is particularly economical since it allows obtaining dials carrying projecting symbols which are made, for instance, of gold, while resorting only to the amount of gold which is strictly required for their execution. This is ascribable chiefly to the presence of the lead 2 embedded in the mold and subsequently removed. The dial plate may be obtained through any conventional means, for instance, through stamping. Lastly, the symbols, as also the dial plate, can be finished independently of one another and the operations on the dial plate cannot damage the symbols and vice versa.
Of course, my invention is by no means limited to the method described hereinabove which may be subjected to many modifications within the scope of the accompanying claims.
Similarly, the symbols may also be obtained separately for instance, through an electrolytic deposit of metal in a mold as before described where the dial to be used for fixing indicia thereon functions as the conductive member 2.
What I claim is:
1. A method for manufacturing a clockwork dial having indicia thereon in relief comprising, providinga dial having a major face to which indicia are to be secured and a form, forming the indicia simultaneously in spaced relative positions in said form corresponding to spaced as relative positions in which said indicia are to be fixed relative to each other on said major face of said dial with an area of each such indicia exposed, attaching a rigid carrier to said area of each such indicia to maintain said indicia in said relative positions upon removal of said form, removing said form from said indicia, positioning said carrier and indicia attached thereto in position with said indicia between the dial and carrier with said indicia in contact with said major face of said dial to which said indicia are to be secured, permanently securing the indicia on said dial in said relative positions, and removing said carrier.
2. A method for manufacturing a clockwork dial having indicia thereon in relief comprising, providing a dial having a major face to which indicia are to be secured and a form having spaced form cavities thereon, coating only the inner surface of said cavities with a conductive coating and providing an internal current flow path to said inner surfaces, depositing metal only in said cavities by electrodeposition for forming the indicia in spaced relative positions in which said indicia are to be fixed relative to each other on said major face of said dial with an area of each such indicia exposed, attaching a rigid carrier to said area of each such indicia to maintain said indicia in said relative positions upon removal of said form, removing said form from said indicia, positioning said carrier and indicia attached thereto. in position with said indicia between the dial and carrier with said indicia in contact with said major face of said dial to which said indicia are to be secured, permanently securing the indicia on said dial in said relative positions, and removing said carrier.
3. A method for manufacturing a clockwork dial having indicia thereon in relief comprising, providing a dial having a major face to Which indicia are to be permanently secured, providing a dissolvable form having cavities therein for forming the indicia, the cavities being electrically connected internally of the mold rendering the inner surfaces of said cavities electrically conductive, depositing material in said cavities only during application of electrical current to said cavity inner surfaces to form said indicia, said cavities being disposed spaced relative to each other in position corresponding to the spaced relative positions said indicia are to occupy relative to each other when secured to said dial, attaching a rigid carrier to all of said indicia subsequent to the deposition thereof to hold said indicia in fixed relative positions upon removal of said form, dissolving the form to free the indicia therefrom, positioning the carrier for securing the indicia on said dial, permanently securing said indicia on said dial, and removing the carrier from said indicia so that the indicia remain fixed in position on said dial free of said carrier.
4. A method for manufacturing a clockwork dial having indicia thereon in relief comprising, providing a dial having a major face to which indicia are to be permanently secured, providing a dissolvable form having cavities therein for forming the indicia, the cavities being electrically connected internally of the mold rendering the inner surfaces of said cavities electrically conductive, depositing material in said cavities only during application of electrical current to said cavity inner surfaces to form said indicia, said cavities being disposed spaced relative to each other in position corresponding to the spaced relative positions said indicia are to occupy relative to each other when secured to said dial, attaching a rigid conductive carrier to all of said indicia subsequent to the deposition thereof to hold said indicia in fixed relative positions upon removal of said form, dissolving the form to free the indicia therefrom, positioning the carrier with indicia thereon in position relative to said major face of the dial for securing the indicia on said dial, applying welding current to said dial and carrier for permanently securing said indicia on said dial, and removing the carrier from said indicia so that the indicia remain fixed in position on said dial free of said carrier.
5. A method for manufacturing a clockwork dial having indicia thereon in relief comprising, providing a dial having a major face to which indicia are to be permanently secured, providing a dissolvable form having cavities therein for forming the indicia, the cavities being electrically connected internally of the form rendering the inner surfaces of said cavities electrically conductive, depositing material in said cavities only during application of electrical current to said cavity inner surfaces to form said indicia, said cavities being disposed spaced relative to each other in position corresponding to the spaced relative positions said indicia are to occupy relative to each other when secured to said dial, applying a protective coating to an exposed end of said indicia in said cavities, prior to applying said coating finishing surfaces on said indicia on which said coating is applied, attaching a rigid carrier to all of said indicia over said coating subsequent to the deposition thereof to hold said indicia in fixed relative positions upon removal of said form, dissolving the form to free the indicia therefrom, positioning the carrier with indicia thereon in position relative to said major face of the dial for securing the indicia on said dial, permanently securing said indicia on said dial, and removing the carrier from said indicia so that the indicia remain fixed in position on said dial free of said carrier.
References Cited by the Examiner UNITED STATES PATENTS 366,085 7/1887 Fitch 29177 1,392,007 9/1921 Freund 29177 1,571,756 2/1926 Colomb 29-177 1,648,046 11/1927 Fulton 2049 X 1,995,036 3/1935 Pape 58127 2,011,517 8/1935 Geoifrion 58-127 2,608,529 8/ 1952 Varian.
2,761,198 8/1956 Stern 29177 3,076,230 2/1963 Parker et al. 29-423 X JOHN F. CAMPBELL, Primary Examiner.
NEDWIN BERGER, \VHITMORE A. WILTZ, T. D.
SHAFFNER, Examiners.

Claims (1)

1. A METHOD FOR MANUFACTURING A CLOCKWORK DIAL HAVING INDICIA THEREON IN RELIEF COMPRISING, PROVIDING A DIAL HAVING A MAJOR FACE TO WHICH INDICIA ARE TO BE SECURED AND A FORM, FORMING THE INDICIA SIMULTANEOUSLY IN SAPCED RELATIVE POSITIONS IN SAID FORM CORRESPONDING TO SPACED RELATIVE POSITIONS IN WHICH SAID INDICIA ARE TO BE FIXED RELATIVE TO EACH OTHE ON SAID MAJOR FACE OF SAID DIAL WITH AN AREA OF EACH SUCH INDICIA EXPOSED, ATTACHING A RIGID CARRIER TO SAID AREA OF EACH SUCH INDICIA TO MAINTAIN SAID INDICIA IN SAID RELATIVE POSITIONS UPON REMOVAL OF SAID FORM, REMOVING SAID FORM FROM SAID INDICIA, POSITIONING SAID CARRIER AND INDICIA ATTACHED THERETO IN POSITION WITH SAID INDICIA BETWEEN THE DIAL AND CARRIER WITH SAID INDICIA IN CONTACT WITH SAID MAJOR FACE OF SAID DIAL TO WHICH SAID INDICIA ARE TO BE SECURED, PERMANENTLY SECURING THE INDICIA ON SAID DIAL IN SAID RELATIVE POSITIONS, AND REMOVING SAID CARRIER.
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CH761360A CH374936A (en) 1960-07-04 1960-07-04 Manufacturing process of a clock face provided with raised signs

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513153A (en) * 1995-02-13 1996-04-30 Timex Corporation Method of manufacturing three-dimensional indicia on electroluminescent timepiece dials and timepiece dials produced thereby

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US366085A (en) * 1887-07-05 Method of making enameled watch-dials
US1392007A (en) * 1918-08-08 1921-09-27 Joseph A Freund Process of making watch-plates
US1571756A (en) * 1922-10-05 1926-02-02 Colomb Henri Manufacturing process of blanks for watch movements provided with jewel-insetting or plug holes
US1648046A (en) * 1921-05-26 1927-11-08 Fulton Sylphon Co Tubular corrugated wall and method of making the same
US1995036A (en) * 1932-09-13 1935-03-19 Premier Metal Etching Company Index dial plate
US2011517A (en) * 1934-09-04 1935-08-13 Arthur J Geoffrion Clock dial
US2608529A (en) * 1945-12-29 1952-08-26 Sperry Corp Method of uniting parts by electrodeposition
US2761198A (en) * 1952-10-02 1956-09-04 Stern Charles Method for producing time-indicating elements
US3076230A (en) * 1960-01-14 1963-02-05 Western Electric Co Mold for casting electrical component mounting boards

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US366085A (en) * 1887-07-05 Method of making enameled watch-dials
US1392007A (en) * 1918-08-08 1921-09-27 Joseph A Freund Process of making watch-plates
US1648046A (en) * 1921-05-26 1927-11-08 Fulton Sylphon Co Tubular corrugated wall and method of making the same
US1571756A (en) * 1922-10-05 1926-02-02 Colomb Henri Manufacturing process of blanks for watch movements provided with jewel-insetting or plug holes
US1995036A (en) * 1932-09-13 1935-03-19 Premier Metal Etching Company Index dial plate
US2011517A (en) * 1934-09-04 1935-08-13 Arthur J Geoffrion Clock dial
US2608529A (en) * 1945-12-29 1952-08-26 Sperry Corp Method of uniting parts by electrodeposition
US2761198A (en) * 1952-10-02 1956-09-04 Stern Charles Method for producing time-indicating elements
US3076230A (en) * 1960-01-14 1963-02-05 Western Electric Co Mold for casting electrical component mounting boards

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513153A (en) * 1995-02-13 1996-04-30 Timex Corporation Method of manufacturing three-dimensional indicia on electroluminescent timepiece dials and timepiece dials produced thereby

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