US2864232A - Balance roller for lever escapement of a timepiece - Google Patents

Balance roller for lever escapement of a timepiece Download PDF

Info

Publication number
US2864232A
US2864232A US556241A US55624155A US2864232A US 2864232 A US2864232 A US 2864232A US 556241 A US556241 A US 556241A US 55624155 A US55624155 A US 55624155A US 2864232 A US2864232 A US 2864232A
Authority
US
United States
Prior art keywords
pin
roller
lever
disc
recess
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
US556241A
Other languages
English (en)
Inventor
Tuetey Paul
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.)
Les Fabriques dAssortiments Reunies SA FAR
Original Assignee
Les Fabriques dAssortiments Reunies SA FAR
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 Les Fabriques dAssortiments Reunies SA FAR filed Critical Les Fabriques dAssortiments Reunies SA FAR
Application granted granted Critical
Publication of US2864232A publication Critical patent/US2864232A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel

Definitions

  • the present invention relates to a lever escapement of timepieces and more particularly to a balance roller for lever escapement and to a process of manufacture of same.
  • the balance roller carrying an impulse pin comprises a central disc having a non-circular recess receiving the pin, said pin being secured in its position by means of a ring bearing both on the pin and on the periphery of the disc.
  • the balance roller is generally rigidly fixed to a small roller adapted to cooperate with the guard pin or dart of the pallet fork or lever.
  • the bore of the large roller adapted to receive the impulse pin and the notch of the small roller had to be executed separately with the risks of imprecision involved therewith.
  • the radial alignment of the pin bore and of the notch was not guaranteed, so that the safety functions of the escapement were not made correctly.
  • Fig. 3 is an elevation view of the lever escapement shown in Fig. 2.
  • Fig. 4 is a perspective exploded view of the same embodiment at an enlarged scale.
  • Fig. 5 is a perspective view corresponding to Fig. 4, but in which the parts of the roller are assembled to one another.
  • Figs. 6 to 11 are bottom views of six other embodiments, at a reduced scale.
  • Figs. 12 and 13 are cross-sectional views of two modified structures.
  • Fig. 1 it will be seen the end portion of a lever or pallet fork 1 and a double balance roller 2, 3 of a lever escapement of a known construction.
  • the limiting pins of the lever 1 are denoted by the numerals 4, the impulse pin or roller jewel by 5, the notch of the small roller by 6, the horns of the lever by 7, the guard pin or dart by 8, the balance staff by 9 and the roller can non by 10.
  • the large roller comprises a central disc 11 having a non-circular recess 12 obtained for instance by a milling operation.
  • the recess 12 is machined in such a way that the pin 5, when put into position, slightly lies outside the circumference of the disc 11.
  • the pin 5 has an approximately semicylindrical shape and it is its plane face which closes the open side of the recess 12.
  • This assembling system of the impulse pin and ofthe large roller permits machining simultaneously the recess 12 and the notch 14 of the small roller '15.
  • This machining is made in a single operation and with the same tool, preferably by milling.
  • the notch 14 of the small roller has the same shape as a portion of the recess 12 of the large roller and is situated in the axial prolongation of thisportion.
  • the risks ofimpr'ecisio'n mentioned above are therefore done away with, as the radial alignment of the place receiving the pin and of the notch of the small roller is now guaranteed.
  • the safety functions of the escapement are made correctly; any subsequent checking is superfluous and an important cause of refuse in the manufacture is removed.
  • FIG. 1 shows for comparison purposes a bottom view of a portion of a lever escapement of a known construction.
  • Fig. 2 is a view corresponding to Fig. 1 of the first embodiment of the invention and of the lever co-operating therewith.
  • the radius of the cannon only depends on 'the'length of the horns 7 or 16 respectively ofthe lever 1. This length in turn is conditioned .by the necessity of avoiding any overbanking of the lever 1 between the moment when thedar't- 8 or- '18 respectively is no longer in contact with the small roller 3 or '15 respectively (Within the range of the notch) and the moment when the pin 5 enters the opening of the lever. This lapse of time is the shorter as the radius of the small roller is greater or the dart is wider. In the construction illustrated in Fig.
  • the shape of the recess 12 and of the notch 14, instead of being semicylindrical as in Figs. 2 to 5, may be modified in order to facilitatethe machining by means of milling tools having a profile easy to draw up.
  • the recess 12a and the notch14a have a rectangular cross-section, Whereas in the embodiment of Fig. 7 they have the shapeof a slightly obtuse dihedral angle and are denoted by 12b and 14b, respectively.
  • the cross-section of the recess 12c and of the notch 140 is trapezoidal.
  • Figs. 10 and 11 show two constructions with this feature, the rings being denoted by.13a and 13b, respectively.
  • the large roller and the small roller are generally made integral with each other.
  • the two-piece construction was also executed previously and in certain cases the small roller was made integral with the balance staff.
  • the disc 11 is made integral only with the balance staff 9, whereas the small roller 15 is held by a drive fit on the balance statf 9 (Fig. 12).
  • a balance-roller for lever escapement of a timepiece carrying an impulse pin adapted to cooperate with the lever, the roller comprising a central disc of uniform thickness having at its periphery a non-circular recess, open towards the outside and rec-eiving the impulse pin, and an outer ring surrounding the central disc and hearing both on the pin and on the periphery of the disc so as to press the pin against the wall of the recess and thus secure the pin in its position.
  • a :balance roller for lever escapement of a timepiece carrying an impulse pin adapted to cooperate with the lever, the roller comprising a central disc of uniform thickness having at its periphery a non-circular recess, open towards the outside and receiving the impulse pin, the pin lying partially outside the circumference of the disc, and an outer ring surrounding the central disc and bearing both on the pin and on the periphery of the disc so as to press the pin against the wall of the recess and thus secure the pin in its position.
  • a balance roller for lever escapement of a timepiece carrying an impulse pin adapted to cooperate with the lever, the roller comprising a central disc of uniform thickness having at its periphery a semicylindrical recess open towards the outside and receiving the impulse pin, and an outer ring surrounding the central disc and bearing both on the pin and on the periphery of the disc so as to press the pin against the wall of the recess and thus secure the pin in its position.
  • a balance roller for lever escapement of a timepiece carrying an impulse pin adapted to cooperate with the lever, the roller comprising a central disc having a non-circular recess receiving the impulse pin, and an outer ring surrounding the central disc and bearing both on the pin and on the periphery of the disc so as to press the pin against the Wall of the recess and thus secure the pin in its position, the ring being held by a drive fit.
  • a balance roller for lever escapement of a timepiece carrying an impulse pin adapted to cooperate with the lever, the roller comprising a central disc having a. non-circular recess receiving the impulse pin, and an outer ring surrounding the central disc and bearing both on the pin and on the periphery of the disc so as to press the pin against the wall of the recess and thus secure the pin in its position, the ring being held in position by elastic deformation.
  • a balance roller for lever escapement of a timepiece carrying an impulse pin adapted to cooperate with the lever, the roller comprising a central disc having a non-circular recess receiving the impulse pin, and an outer ring surrounding the central disc and bearing both on the pin and on the periphery of the disc so as to press the pin against the wall of the recess and thus secure the pin in its position, the impulse pin being placed within the circumference of the disc.
  • a balance roller for lever escapement of a timepiece carrying an impulse pin adapted to cooperate with the lever, the roller comprising a central disc having a non-circular recess receiving the impulse pin, and an outer ring surrounding the central disc and bearing both on the pin and on the periphery of the disc so as to press the pin against the wall of the recess and thus secure the pin in its position, the disc being made integral with the balance staff.
  • a balance roller assembly for lever escapement having a lever with a guard pin of a timepiece, carrying an impulse pin adapted to cooperate with the lever, the roller assembly comprising a central disc having a noncircular recess receiving the impulse pin, and an outer ring surrounding the central disc and bearing both on the pin and on the periphery of the disc so as to press the pin against the wall of the recess and thus secure the pin in its position, a small roller, the disc being rigidly fixed to the small roller which is adapted to cooperate with the guard pin of the lever, the central disc and the small roller being made integral with the balance staff.
  • a balance roller assembly for lever escapement having a lever with a guard pin of a timepiece, carrying an impulse pin adapted to cooperate with the lever, the roller assembly comprising a central disc having a noncircular recess receiving the impulse pin, and an outer ring surrounding the central disc and bearing both on the pin and on the periphery of the disc so as to press the pin against the wall of the recess and thus secure the pin in its position, a small roller, the disc being rigidly fixed to the small roller which is adapted to cooperate with the guard pin of the lever, the notch of the small roller having the same shape as a portion of the recess of the disc and being situated in the axial prolongation of said portion.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Forging (AREA)
  • Micromachines (AREA)
  • Clamps And Clips (AREA)
US556241A 1955-02-25 1955-12-29 Balance roller for lever escapement of a timepiece Expired - Lifetime US2864232A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH321184T 1955-02-25
CH1036766X 1955-02-25
CH2864232X 1955-02-25

Publications (1)

Publication Number Publication Date
US2864232A true US2864232A (en) 1958-12-16

Family

ID=61598416

Family Applications (1)

Application Number Title Priority Date Filing Date
US556241A Expired - Lifetime US2864232A (en) 1955-02-25 1955-12-29 Balance roller for lever escapement of a timepiece

Country Status (3)

Country Link
US (1) US2864232A (fr)
CH (1) CH321184A (fr)
DE (1) DE1036766B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100208555A1 (en) * 2009-02-17 2010-08-19 Hiraoka Masashi Escapement governor, mechanical watch, pallet fork (incomplete) manufacturing method, and roller manufacturing method
US9927772B2 (en) * 2012-09-07 2018-03-27 Nivarox-Far S.A. Flexible constant-force pallet lever
US11073795B2 (en) * 2017-11-22 2021-07-27 Nivarox-Far S.A. Pallets for the escapement of a clock movement
EP4625063A1 (fr) * 2024-03-28 2025-10-01 Richemont International S.A. Balancier de mouvement horloger et procede de fabrication d'un tel balancier

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US901487A (en) * 1907-08-14 1908-10-20 Joseph Schoop Roller for watches.
US1345318A (en) * 1920-01-05 1920-06-29 Colomb Henri Double-roller lever-escapement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE546908C (de) * 1932-03-17 Tavannes Watch Co Sa Unruhwelle mit Doppelrolle
DE482913C (de) * 1927-04-04 1929-09-23 Tavannes Watch Co Sa Ankerhemmungsscheibe mit durch Klemmwirkung festgehaltenem Hebestift
CH287923A (fr) * 1950-04-28 1952-12-31 Omega Brandt & Freres Sa Louis Dispositif amortisseur de chocs pour balancier de montre.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US901487A (en) * 1907-08-14 1908-10-20 Joseph Schoop Roller for watches.
US1345318A (en) * 1920-01-05 1920-06-29 Colomb Henri Double-roller lever-escapement

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100208555A1 (en) * 2009-02-17 2010-08-19 Hiraoka Masashi Escapement governor, mechanical watch, pallet fork (incomplete) manufacturing method, and roller manufacturing method
US8591101B2 (en) * 2009-02-17 2013-11-26 Seiko Instruments Escapement governor, mechanical watch, pallet fork (incomplete) manufacturing method, and roller manufacturing method
US9927772B2 (en) * 2012-09-07 2018-03-27 Nivarox-Far S.A. Flexible constant-force pallet lever
US11073795B2 (en) * 2017-11-22 2021-07-27 Nivarox-Far S.A. Pallets for the escapement of a clock movement
EP4625063A1 (fr) * 2024-03-28 2025-10-01 Richemont International S.A. Balancier de mouvement horloger et procede de fabrication d'un tel balancier

Also Published As

Publication number Publication date
DE1036766B (de) 1958-08-14
CH321184A (fr) 1957-04-30

Similar Documents

Publication Publication Date Title
US10114339B2 (en) Anti-shock system with angular locking
US2864232A (en) Balance roller for lever escapement of a timepiece
JP6219941B2 (ja) 計時器用の分解不能な耐衝撃システム
US3712051A (en) Shock absorbing pivot bearing for watches
US9004746B2 (en) Timepiece wheel set with peripheral guiding
US2015905A (en) Shockproof bearing, particularly for clock mechanisms
US3633356A (en) Mechanism for detachably attaching a timepiece movement to a watch casing, especially the middle ring thereof
CN114787721A (zh) 时计显示机构
US1327226A (en) Watch-escapement
US4143511A (en) Shock-absorbing bearing for timepiece movements
US3364673A (en) Horologe hairspring attachment collet
US3934406A (en) Balance wheel assembly and method for manufacture thereof
US3675414A (en) Wrist watches
US3956881A (en) Hairspring and collet assembly for timepieces
US2671309A (en) Bearing for clockwork members
US3789691A (en) Frictional coupling device for watch movement
US3852954A (en) Mechanical watch movement
US2146329A (en) Cap jewel bearing for clockwork mechanism
US2621468A (en) Fluidtight casing, especially for watches
US4684263A (en) Magnetic brake for timepiece
US1950867A (en) Pivot bearing for clocks, watches, and other precision instruments
US2219068A (en) Pivot bearing for watch movements
US1845430A (en) Resilient pivot bearing
JP5925249B2 (ja) 時計の構造的構成部品の保護
US2523873A (en) Thrust disk for supporting axles in movements of timepieces