US3274766A - Fixing device of the inner end of a regulating hairspring in a timepiece - Google Patents

Fixing device of the inner end of a regulating hairspring in a timepiece Download PDF

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Publication number
US3274766A
US3274766A US411286A US41128664A US3274766A US 3274766 A US3274766 A US 3274766A US 411286 A US411286 A US 411286A US 41128664 A US41128664 A US 41128664A US 3274766 A US3274766 A US 3274766A
Authority
US
United States
Prior art keywords
collet
hair
spring
lodging
glue
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
US411286A
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English (en)
Inventor
Desaules Jean-Jacques
Henchoz Henri-Louis
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.)
Tissot SA
Original Assignee
Fabrique dHorlogerie CHS Tissot et Fils 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 Fabrique dHorlogerie CHS Tissot et Fils SA filed Critical Fabrique dHorlogerie CHS Tissot et Fils SA
Application granted granted Critical
Publication of US3274766A publication Critical patent/US3274766A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • G04B17/345—Details of the spiral roll

Definitions

  • This invention relates to a fixing device of the inner and of a regulating hair-spring of a timepiece, comprising a collet having a curved side surface against which at least a part of the inner coil of the hair-spring is held applied.
  • It also relates to a manufacturing method of this de vice and to a molding member for performing the method.
  • the device is characterized in that the collet is provided with a lodging which is open in the said side surface and in that the hair-spring is secured to the collet by means of a solidified mass of glue filling said lodging up to a level higher than the upper level of the hairspring, and adhering to its walls as well as to the hairspring;
  • the method is characterized in that a molding member made out of a material at which the glue used does not adhere is juxtaposed to the collet so as to close said lodging tightly, and in that glue is introduced through a part of this lodging which remains open.
  • the molding member for performing this method is characterized in that it consists of a plastic material to which the glue used does not adhere, and in that it comprises an upper planar surface capable to support a part of the neighbouring hair-spring coils, a projection extending above said upper surface and being arranged so that it can be inserted between the last and the first but last coil, and an inner curved side surface matching the collet side surface in which opens a cavity opened upwards.
  • FIGURE 1 is a plan view of said embodiment
  • FIGURE 2 is a part axial section thereof.
  • FIGURE 1 represents a collet I mounted on a cylindrical rod 2 protruding from a receptacle 3 on the upper surface of which the collet 1 lies.
  • a hair-spring 4 is set in place around collet 1, its different coils being supported in part by the receptacle 3 and in part by a molding member 5 made of a plastic material and having generally a cylindrical shape with a planar upper surface 6. This member bears against collet 1. It enables exactly metering a mass of glue 7 introduced in part into a lodging 8 of the collet.
  • the hair-spring 4 is embedded in this glue mass and thus secured to the collet.
  • the collet 1 has in a plan view the general shape of a rhornbus with two apices cut away. Its side surfaces comprise two diametrically opposed curved surfaces 9 and 10, having a cylindrical shape.
  • the end portion of the inner coil of the hairspring 4 is frictionally inserted in a groove 11 of rectangular cross-section provided horizontally in the side surface 9.
  • a similar groove 12 provided in the side surface 10 extends a part of the hair-spring 4 which is situated approximately in the middle of the inner coil. It will be observed that the inner hair-spring coil extends between grooves 11 and 12 substantially along a path corresponding to its natural curvature and wholly situated outside the collet.
  • the lodging 8. is obtained by providing a blind cylindrical hole having an axis parallel to that of the collet, in the outer portion delimited by surface 10. This hole is positioned so that its wall intersects surface 10 over a width substantially smaller than the hole diameter in order to form edges gripping the solidified glue mass 7 thus adding a supplemental mechanical resistance to the adhesion force.
  • the molding member 5 comprises a projection 13 extending above surface 6 in the vicinity of its periphery and a concave lateral cut-out, which extends up to the vertex of projection 13 and the bottom of which has the shape of the side surface 10 of collet 1.
  • the projection 13 is finally provided with a lateral cavity 14 which extends exactly opposite lodging 8 when the molding member 5 is in place as shown in the drawing.
  • Member 5 is then applied against the side surface 10 of the collet so that no joint subsists between these two pieces.
  • the projection 13 and the collet 1 constitute a mold closed on all sides, except upwards, and consisting of cavity 14 and lodging 8.
  • the hair-spring 4 extends across this mold approximately in the middle of its height while leaving all the sides thereof.
  • the glue mass 7 is introduced into the mold from upside and it will be observed that this mass wholly surrounds the part of hair-spring 4 which extends across the mold.
  • the thermoplastic material known as Delrin (registered trademark) is preferably used and as glue, a usual glue such as Araldite (registered trademark) which can dry as a compact and solid mass, firmly adhering to metallic surfaces such as those of the hair-spring 4 and the collet 1.
  • a usual glue such as Araldite (registered trademark) which can dry as a compact and solid mass, firmly adhering to metallic surfaces such as those of the hair-spring 4 and the collet 1.
  • thermoplastic materials of the type Delrin have the property that they cannot be glued by means of such glues so that, after solidification of mass 7, it is possible to remove the molding member 5 without exerting any effort on the collet and without executing cutting operations.
  • the molding member 5, once re moved, is perfectly clean and can immediately be used again for a new operation.
  • the solidified glue mass 7 wholly surrounds the part of hair-spring 4 Which extends across the lodging 8. It extends beyond the boundaries of this lodging and covers at least a part of the side surface 10 of the collet, but in radial direction, it does not extend beyond the pre- 6 determined value depending on the depth of cavity 14, i.e. this radial extension is very exactly limited to the desired value.
  • the depth of cavity 14 can thus be chosen in such a way that the glue mass 7 will never come in contact with the second coil of the hair-spring during a complete oscillation.
  • collet 1 to hair-spring 4 accordingly consist in cutting the hair-spring to the desired diameter, then in inserting the end and the middle part of the last coil into the grooves 11 and 12, which ensures the whole hair-spring to be centered and held flat.
  • molding member 5 is set in place by inserting the projection 13 between the second and the first coil so as to apply the latter against the bottom of groove 11. Member 5 is then in contact with the side surface 10. The outer coils of the hair-spring are supported by member 5 and receptacle 3. The hair-spring is centered and held flat by the collet groove. Then it sufiices tofill the cavity 14 and the lodging 8 with glue.
  • said blob consisting of adhesive material and said projection of said blob filling up said collet lodging.
  • said collet lodging extending, in height, up to the collet upper surface.
  • the collet having a side surface being provided with a groove the bottom of which constitutes said outer convex said surface portion, said groove having a rectangular cross-section in which the hair-spring blade is inserted.
  • said lodging intersecting the collet side surface over a width smaller than the diameter of said lodging.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Hair Curling (AREA)
  • Springs (AREA)
US411286A 1964-01-31 1964-11-16 Fixing device of the inner end of a regulating hairspring in a timepiece Expired - Lifetime US3274766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH115664A CH426653A (fr) 1964-01-31 1964-01-31 Dispositif de fixation de l'extrémité intérieure d'un spiral réglant d'un mouvement d'horlogerie, procédé de fabrication de ce dispositif, et organe de moulage pour la mise en oeuvre du procédé

Publications (1)

Publication Number Publication Date
US3274766A true US3274766A (en) 1966-09-27

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ID=4203781

Family Applications (1)

Application Number Title Priority Date Filing Date
US411286A Expired - Lifetime US3274766A (en) 1964-01-31 1964-11-16 Fixing device of the inner end of a regulating hairspring in a timepiece

Country Status (2)

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US (1) US3274766A (fr)
CH (1) CH426653A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364673A (en) * 1964-09-01 1968-01-23 Anglo Celtic Watch Company Ltd Horologe hairspring attachment collet
US3956881A (en) * 1974-06-25 1976-05-18 Eta A.G. Ebauches-Fabrik Hairspring and collet assembly for timepieces
US6612734B1 (en) * 1999-07-29 2003-09-02 Seiko Instruments Inc. Mechanical timepiece with stud adjustment mechanism
CN113267983A (zh) * 2020-01-29 2021-08-17 精工时计株式会社 钟表用零件、摆轮游丝机构、机芯和钟表

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2017027B1 (fr) * 1968-08-26 1973-07-13 Kullmann Jean Claude

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US995537A (en) * 1909-07-12 1911-06-20 Rauch And Lang Carriage Company Jig for holding articles during machining.
US1936083A (en) * 1930-10-04 1933-11-21 Magnesium Dev Corp Welding metal articles
US2606482A (en) * 1948-11-04 1952-08-12 O E Sorensen Inc Workholder
US2649684A (en) * 1949-02-10 1953-08-25 Instr Springs Mfg Company Hairspring assembly
US2931164A (en) * 1958-04-01 1960-04-05 Kienzle Uhrenfabriken Ag Balance wheel spring-end mounting
US3116547A (en) * 1960-03-08 1964-01-07 Arthur B Nepple Method for coupling a pair of cylindrical members in end-to-end abutment
US3139364A (en) * 1958-11-03 1964-06-30 American Railroad Curvelining Method of making railway track

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US995537A (en) * 1909-07-12 1911-06-20 Rauch And Lang Carriage Company Jig for holding articles during machining.
US1936083A (en) * 1930-10-04 1933-11-21 Magnesium Dev Corp Welding metal articles
US2606482A (en) * 1948-11-04 1952-08-12 O E Sorensen Inc Workholder
US2649684A (en) * 1949-02-10 1953-08-25 Instr Springs Mfg Company Hairspring assembly
US2931164A (en) * 1958-04-01 1960-04-05 Kienzle Uhrenfabriken Ag Balance wheel spring-end mounting
US3139364A (en) * 1958-11-03 1964-06-30 American Railroad Curvelining Method of making railway track
US3116547A (en) * 1960-03-08 1964-01-07 Arthur B Nepple Method for coupling a pair of cylindrical members in end-to-end abutment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364673A (en) * 1964-09-01 1968-01-23 Anglo Celtic Watch Company Ltd Horologe hairspring attachment collet
US3956881A (en) * 1974-06-25 1976-05-18 Eta A.G. Ebauches-Fabrik Hairspring and collet assembly for timepieces
US6612734B1 (en) * 1999-07-29 2003-09-02 Seiko Instruments Inc. Mechanical timepiece with stud adjustment mechanism
CN113267983A (zh) * 2020-01-29 2021-08-17 精工时计株式会社 钟表用零件、摆轮游丝机构、机芯和钟表

Also Published As

Publication number Publication date
CH426653A (fr) 1967-06-30
CH115664A4 (fr) 1966-07-15

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