US3872663A - System for mounting the outer hair spring end of a watch movement - Google Patents

System for mounting the outer hair spring end of a watch movement Download PDF

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Publication number
US3872663A
US3872663A US429580A US42958074A US3872663A US 3872663 A US3872663 A US 3872663A US 429580 A US429580 A US 429580A US 42958074 A US42958074 A US 42958074A US 3872663 A US3872663 A US 3872663A
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US
United States
Prior art keywords
hair spring
frame
watch
spring end
balance
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
US429580A
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English (en)
Inventor
Heinz Meitinger
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.)
Bifora Uhren J Bidlingmaier GmbH
Original Assignee
Bifora Uhren J Bidlingmaier GmbH
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
Priority claimed from DE19732301147 external-priority patent/DE2301147C2/de
Application filed by Bifora Uhren J Bidlingmaier GmbH filed Critical Bifora Uhren J Bidlingmaier GmbH
Application granted granted Critical
Publication of US3872663A publication Critical patent/US3872663A/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
    • G04B17/325—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring in a fixed position, e.g. using a block

Definitions

  • ABSTRACT In a watch: A balance-and-hair spring time keeping oscillator, the balance being journalled in bearings and the inner hair spring end being mounted on the balance shaft while its outer end is fastened to the watch frame by clamping between a frame part and the free end of a leaf spring biased against said frame part, the outer hair spring end being deformed during the first assembly to assume the step-like shape of said frame part in order to reproduce the position after repair and reassembling.
  • the invention relates to a system for mounting the outer hair spring end at a frame part of a watch movement.
  • the outer hair spring end is clamped by means of a conical pin in a bore of a member which in turn is connected with a frame.
  • the outer hair spring end is urged against a projection fastened at the frame by means of a screw and a flat element so to fix the hair spring end.
  • a further object of the invention is to provide a mounting system for the outer hair spring end of watches such that after disassembly of the movement and repair the outer hair spring end will be accurately positioned as before when reassembling the watch again.
  • the invention provides a clamping spring fastened with one of its ends at the frame while its other distal free end is biased against a part of the frame, the hair spring end being clamped between said part and the biased clamping spring end.
  • the clamping spring is mounted at the frame preferably at a bridge which carries a balance shaft bearing in such a manner that the connection cannot be disassembled any more.
  • the part of the frame at which the hair spring end is clamped will preferably be a projection of said bridge which may be bent to extend perpendicularly with respect to the plane thereof.
  • Such a system may be implemented with a minimum of expense. If the part of the frame is provided with a step and the distal end of the clamping spring with a hook shaped complementary with respect to said step the outer hair spring end when assembled initially will be deformed to assume the shape of a step and thus is mounted in position not only under the action of the clamping spring bias but also due to the shaping of the three members which form the connection. This desired position of the hair spring end will be reproduced when reassembling a disassembled watch movement. This reproducible positioning will be the easier if the part is provided at a readily accessible position where it is not covered by other members of the movement frame.
  • FIG. 1 illustrates those parts of a watch movement which relate to the invention, in a top plan view
  • FIG. 2 is a side elevation looking in the direction of arrow A of FIG. 1.
  • the regulator arm 3 is in conventional manner rotatably mounted on bearing 5 and provides the opportunity to vary the effective length of hair spring 1 and thus the oscillation frequency of the balance. This is due to the closed slot at projection 6 in which the outermost winding of hair spring 1 is received.
  • the system according to the invention comprises the projection 9 bent perpendicularly with respect to bridge 2 and clamping spring 7 rigidly mounted at nose 8 of bridge 2.
  • the outer end of the hair spring to be mounted is positioned between the end 4 of spring 7 and projection 9 and is clamped due to the bias to which the spring 7 is subjected with respect to projection 9 due to its position.
  • a step 12 is provided at projection 9.
  • the end 4 of clamping spring 7 is shaped like a hook 13 whose configuration corresponds complementarily to that of step 12.
  • the system according to the invention provides the possibility to connect the outer hair spring end in a simple and inexpensive manner with the watch movement frame.
  • it is just necessary to remove the clamping spring end 4 from projection 9 by exerting a small pressure counteracting the bias.
  • the reassembly occurs in the same manner in inverse order, the step of the hair spring end at any time centering between the hook 13 and step 12 of projection 9. Since the leaf spring 7 is rigidly fastened to the frame the system according to the invention does not require any thread. This permits the manufacture of bridge 2 in an inexpensive manner from thin bendable material. Moreover the risk of screws becoming loose is eliminated. Finally, the assembly itself is facilitated because there are no parts at all which are not rigidly connected with others.
  • a system for mounting the outer end of the hair spring of a watch balance comprising a first fixed memher of the watch frame and a second resilient member having a first end rigidly fastened at said frame and having a second distal end resiliently urged against said first member, said first member having an indentation extending perpendicularly to said hair spring end in the plane of the latter, said second member distal end having a shape complementary to that of the first member in the area of contact between them, and the hair spring end being positioned, during assembly of the watch, between said first member and the distal end of said second member so to make it assume the shape of said indentation.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
US429580A 1973-01-11 1974-01-02 System for mounting the outer hair spring end of a watch movement Expired - Lifetime US3872663A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732301147 DE2301147C2 (de) 1973-01-11 Anordnung zum Festlegen des äußeren Spiralfederendes

Publications (1)

Publication Number Publication Date
US3872663A true US3872663A (en) 1975-03-25

Family

ID=5868714

Family Applications (1)

Application Number Title Priority Date Filing Date
US429580A Expired - Lifetime US3872663A (en) 1973-01-11 1974-01-02 System for mounting the outer hair spring end of a watch movement

Country Status (3)

Country Link
US (1) US3872663A (hu)
JP (1) JPS49104671A (hu)
CH (2) CH579296B5 (hu)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060002240A1 (en) * 2004-07-02 2006-01-05 Nivarox-Far S.A. Balance-spring with altered outer curve
US20150138934A1 (en) * 2013-11-20 2015-05-21 Eta Sa Manufacture Horlogere Suisse Timepiece balance spring stud-holder with no screws
US11073796B2 (en) * 2015-12-11 2021-07-27 Eta Sa Manufacture Horlogere Suisse Balance spring stud-holder with simplied assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3400634B2 (ja) 1996-02-28 2003-04-28 富士通株式会社 プリント基板の配線パターン改造方法およびプリント基板の配線パターンの切断方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US906366A (en) * 1908-04-09 1908-12-08 Webster C Ball Hair-spring stud.
US1037741A (en) * 1911-04-19 1912-09-03 Hamilton Watch Co Balance-cock.
US3350875A (en) * 1965-09-08 1967-11-07 Kienzle Uhrenfabriken Gmbh Timepiece regulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US906366A (en) * 1908-04-09 1908-12-08 Webster C Ball Hair-spring stud.
US1037741A (en) * 1911-04-19 1912-09-03 Hamilton Watch Co Balance-cock.
US3350875A (en) * 1965-09-08 1967-11-07 Kienzle Uhrenfabriken Gmbh Timepiece regulator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060002240A1 (en) * 2004-07-02 2006-01-05 Nivarox-Far S.A. Balance-spring with altered outer curve
US7293913B2 (en) * 2004-07-02 2007-11-13 Nivarox-Far S.A. Balance-spring with altered outer curve
US20150138934A1 (en) * 2013-11-20 2015-05-21 Eta Sa Manufacture Horlogere Suisse Timepiece balance spring stud-holder with no screws
US9176475B2 (en) * 2013-11-20 2015-11-03 Eta Sa Manufacture Horlogere Suisse Timepiece balance spring stud-holder with no screws
US11073796B2 (en) * 2015-12-11 2021-07-27 Eta Sa Manufacture Horlogere Suisse Balance spring stud-holder with simplied assembly

Also Published As

Publication number Publication date
CH579296B5 (hu) 1976-08-31
DE2301147B1 (de) 1974-01-17
CH1622873A4 (hu) 1976-03-31
DE2301147A1 (hu) 1974-01-17
JPS49104671A (hu) 1974-10-03

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