US3323396A - Manufacture of hour signs for watch and clock faces - Google Patents

Manufacture of hour signs for watch and clock faces Download PDF

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Publication number
US3323396A
US3323396A US455503A US45550365A US3323396A US 3323396 A US3323396 A US 3323396A US 455503 A US455503 A US 455503A US 45550365 A US45550365 A US 45550365A US 3323396 A US3323396 A US 3323396A
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US
United States
Prior art keywords
section
turret
metallic section
indicium
signs
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.)
Expired - Lifetime
Application number
US455503A
Other languages
English (en)
Inventor
Kochli Willy
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.)
JEAN SINGER AND CIE SA
Original Assignee
JEAN SINGER AND CIE SA
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 JEAN SINGER AND CIE SA filed Critical JEAN SINGER AND CIE SA
Application granted granted Critical
Publication of US3323396A publication Critical patent/US3323396A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G04D3/02—Lathes, with one or more supports; Burnishing machines, with one or more supports
    • G04D3/0227—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks
    • G04D3/0272—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks for components of the time-indicating mechanism, e.g. dials
    • 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
    • G04B19/103—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial attached or inlaid numbers
    • 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
    • G04D3/0051—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 time markers
    • 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
    • Y10T82/00—Turning
    • Y10T82/30—Miscellaneous

Definitions

  • timepiece dials are frequently provided with hour signs attached to the face, and fixed to the latter by means of cylindrical feet.
  • One method of manufacturing such hour signs consists in stamping a metal plate so as to cause two feet to project therefrom, and then centering the band by the feet so shaped so as to cut out the outline of the sign.
  • the stamping and cuttingout tools and equipment necessary for carrying out this process are delicate, and the waste of material (usually gold) is considerable.
  • hour signs require a very high degree of finish, which a standard section could not ensure, and the varied forms that they represent could only be obtained by means of complicated equipment.
  • machine tools that might have been constructed specially for this purpose, in a manner analogous to those known for the manufacture of portions of time-piece parts, would have presented an excessive complexity, and would have seriously burdened the cost of manufacture of the hour signs.
  • the present invention relates specifically to a method of manufacturing hour signs for time-piece faces by means of an automatic lathe with a movable tail-stock and a multi-spindle head-stock, obviating these disadvantages.
  • This method is characterised by the fact that on the movable tail-stock is mounted a metallic section the profile of which corresponds to the blank of the sign, placed lengthwise, by means of a tool at the extremity of the bar, that the bar is then immobilised in an angular position determined in relation to the axis of rotation of the movable tail-stock, that the feet of the sign are then individually machined in succession by means of a tool mounted on at least one of the spindles of the head-stock, and finally that the section is sliced to the ultimate dimensions of the sign by means of a milling cutter mounted upon one spindle of the head-stock, the section being then restored to its lengthwise position in order to obtain the following sign.
  • FIGURES 1, 2 and 3 show a finished sign in profile, in plan and in elevation respectively;
  • FIGURES 4 to 7 illustrate diagrammatically the stages in the machining of such a sign starting from a metallic section.
  • an automatic lathe with a movable tail-stock and with a multi-spindle head-stock, for instance a lathe of the type known by the trade mark Tornos, which is capable of being used for a number of standard machinings.
  • a start is made from a metallic section, usually of precious metal, drawn so as to present a cross section corresponding to the blank of the sign, and to provide a sign having a surface of fine-grained homogeneous structure.
  • a metallic section usually of precious metal, drawn so as to present a cross section corresponding to the blank of the sign, and to provide a sign having a surface of fine-grained homogeneous structure.
  • each of the signs is machined and sectioned successively, so that as the section advances over the lathe, the signs can be produced in series.
  • the section 3 is introduced into the movable tail-stock of the lathe, which is not shown.
  • This movable tail-stock is provided with a cam having two notches apart, and enabling the section carried by the tailstock, to be immobilised 'by means of a locking member, either in the position illustrated in FIGURES 5 and 6 or in that illustrated in FIGURE 7.
  • a radial lathe tool 4 then restores lengthwise the extremity 3a of the section of axis A-A, so as to obtain a smooth front surface, and to fix precisely the height of the machined sign.
  • the tail-stock is then immobilised in the position of the section indicated in FIGURES 5 and 6.
  • one of the spindles of the head-stock, not shown, carrying a rotary lathe tool 5 turns, on the front face of the section 3, a foot 2a, the axis BB of which is parallel to that of the section and merges into that of the said spindle.
  • the head-stock then shifts so that the rotary lathe tool 6 of another spindle turns the foot 2/), with an axis C-C' (FIGURE 6).
  • This stage may optionally be followed by machining facets tangential to the upper face of the finished sign, by means of other spindles of the headstock, bearing suitable tools.
  • a last spindle, of axis D-D', of the head-stock, carrying a milling cutter 7, connected with a disc 7b by a sleeve 70, is placed in a plane perpendicular to the axis of the section, and slices the latter, so as to give to the completed sign its correct height.
  • the disc 7b is designed to retain the sign during the operation of slicing the section. The sign then falls into the trough of the machine.
  • the dividing may of course be effected in a plane which is not perpendicular to the axis of the section.
  • the section as a preliminary step, has been rotated through a quarter of a revolution with the headstock, so as to present its smallest dimension towards the milling cutter.
  • the tools utilised for machining the signs might of course .'be different.
  • the rotary lathe tools would admit of being replaced by bell-shaped milling cutters. It would likewise be possible, by an accessory operation, to hollow out the extremities of the feet of the signs, so as to facilitate riveting them to the dial.
  • Process of making hour indicia for time piece dials by means of an automatic lathe having a movable turret and a multi-spindle counter-turret comprising the steps of mounting on the movable turret, a metallic section having a cross-section corresponding to the shape of the rough cut indicium, positioning the metallic section in a lengthwise direction by means of an index at the end of the metallic section, then immobilizing said metallic section in a selected angular position determined with reference to the axis of rotation of the movable turret successively machining each of a plurality of feet of the indicium by means of at least one tool mounted on at least one of the spindles of the counter-turret and then cutting off the metallic section to definite dimensions of the indicium by means of a cutting tool mounted on a spindle of the counter-turret, the metallic section being then moved lengthwise to a new position for production of the next indicium.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Turning (AREA)
US455503A 1964-05-13 1965-05-13 Manufacture of hour signs for watch and clock faces Expired - Lifetime US3323396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH621264 1964-05-13

Publications (1)

Publication Number Publication Date
US3323396A true US3323396A (en) 1967-06-06

Family

ID=4306040

Family Applications (1)

Application Number Title Priority Date Filing Date
US455503A Expired - Lifetime US3323396A (en) 1964-05-13 1965-05-13 Manufacture of hour signs for watch and clock faces

Country Status (3)

Country Link
US (1) US3323396A (fr)
CH (1) CH621264A4 (fr)
GB (1) GB1090483A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557729A1 (fr) * 2004-01-26 2005-07-27 Nivarox-FAR S.A. Procédé de fabrication d'index horaires et installation pour sa mise en oeuvre
US11009834B2 (en) * 2018-03-06 2021-05-18 Nivarox-Far S.A. Diamond-polished applique for horology

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557729A1 (fr) * 2004-01-26 2005-07-27 Nivarox-FAR S.A. Procédé de fabrication d'index horaires et installation pour sa mise en oeuvre
US20050160574A1 (en) * 2004-01-26 2005-07-28 Nivarox-Far S.A. Method for manufacturing hour-symbols and installation for implementing the same
US7337542B2 (en) 2004-01-26 2008-03-04 Nivarox-Far S.A. Method for manufacturing hour-symbols and installation for implementing the same
CN100543615C (zh) * 2004-01-26 2009-09-23 尼瓦洛克斯-法尔股份有限公司 用于制造小时标记的方法以及用于实施该方法的设备
US11009834B2 (en) * 2018-03-06 2021-05-18 Nivarox-Far S.A. Diamond-polished applique for horology

Also Published As

Publication number Publication date
CH621264A4 (fr) 1966-11-15
GB1090483A (en) 1967-11-08

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