US3469392A - Balance staff for a roskopf watch - Google Patents

Balance staff for a roskopf watch Download PDF

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Publication number
US3469392A
US3469392A US761735A US3469392DA US3469392A US 3469392 A US3469392 A US 3469392A US 761735 A US761735 A US 761735A US 3469392D A US3469392D A US 3469392DA US 3469392 A US3469392 A US 3469392A
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United States
Prior art keywords
balance staff
collet
watch
roskopf
finger
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Expired - Lifetime
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US761735A
Inventor
Paul Tuetey
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Les Fabriques dAssortiments Reunies SA FAR
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Les Fabriques dAssortiments Reunies SA FAR
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    • 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
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots

Definitions

  • a balance staff for a Roskopf watch provided with a finger performing the functions of the roller jewel of a lever escapement, the balance staff comprising a split collet, driven on the balance staff, the collet having a chambet in which is accommodated the finger, thus ensuring the exact position of the latter, whereas the split of the collet is adapted to cooperate with the guard-pin of the fork.
  • the present invention relates to a balance staff for a Roskopf watch, provided with a finger performing the functions of the impulse pin or roller jewel of a lever escapement.
  • a notch is milled in such a balance staff for performing the functions of the usual safetyroller, i.e., for cooperating with the guard-pin of the fork.
  • the notch of the balance staff is expensive, since it must be made separately after the profile-turning. In addition, it causes, at the moment of hardening of the balance staff, deformations which render difficult the poising of the watch-balance.
  • the balance staff of the invention is characterized by a. split collet, driven on the balance staff, said collet having a chamber in which is accommodated the finger, thus ensuring the exact position of the latter, whereas the split of the collet is adapted to cooperate with the guard-pin of the fork.
  • FIG. 1 is an elevation view, partially in section, of this embodiment, along the line I-I of FIG. 2.
  • FIG. 2 is a cross-sectional view along the line II-II of FIG. 1.
  • the balance staff for a Roskopf watch illustrated in 5 part in the drawing, is denoted generally by the reference numeral 1. As usually, it presents a plurality of portions of different diameters, i.e., the seat 2, to which is riveted the balance (not shown), an intermediary portion 3, the
  • a collet 7, split as at 8, distinct from the usual collet (not shown) serving for fixing the inner end of the hairspring, is driven on the balance staff 1, or more precisely on its arbor 4.
  • the collet 7, which may be made of brass, has a height approximately equal to the sum of the heights of the arbor 4 and of the pivot-shank 5, and presents in its lower portion a chamber or recess 9 in which is accommodated the finger 10. The latter is driven on the pivotshank 5 and is oriented in the correct angular position by the collet 7.
  • the split 8 of the collet 7 is indeed just wide enough to form a passage for the arm of the finger 10. As concerns the portion of the split 8 situated above the finger 10, it is adapted to cooperate with the guard-pin (not shown) of the fork.
  • a balance staff for a Roskopf watch adapted to cooperate with a guard pin of a fork and a finger performing the functions of a roller jewel of a lever escapement
  • said staff having an arbor, a split collet driven on said arbor, said collet having an inner chamber in communication with the split, said finger being mounted in said chamber and extending through said split, thus ensuring the exact position of said finger, whereas the split of the collet is adapted to cooperate with the guard pin of the fork.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Adornments (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Description

i 30, 1959 PrTUETEY 3,469,392
BALANCE STAFF FOR A ROSKOPF WATCH Filed Sept. 23, ,1968
PAUL. TUETEY INVENTOR' United States Patent US. Cl. 58-140 3 Claims ABSTRACT OF THE DISCLOSURE A balance staff for a Roskopf watch, provided with a finger performing the functions of the roller jewel of a lever escapement, the balance staff comprising a split collet, driven on the balance staff, the collet having a chambet in which is accommodated the finger, thus ensuring the exact position of the latter, whereas the split of the collet is adapted to cooperate with the guard-pin of the fork.
The present invention relates to a balance staff for a Roskopf watch, provided with a finger performing the functions of the impulse pin or roller jewel of a lever escapement. In general, a notch is milled in such a balance staff for performing the functions of the usual safetyroller, i.e., for cooperating with the guard-pin of the fork.
While the manufacture of the finger is simple (blanking or cutting out), the notch of the balance staff is expensive, since it must be made separately after the profile-turning. In addition, it causes, at the moment of hardening of the balance staff, deformations which render difficult the poising of the watch-balance.
The present invention aims at overcoming these drawbacks. To this end, the balance staff of the invention is characterized by a. split collet, driven on the balance staff, said collet having a chamber in which is accommodated the finger, thus ensuring the exact position of the latter, whereas the split of the collet is adapted to cooperate with the guard-pin of the fork.
The accompanying drawing illustrates, by way of example, an embodiment of the invention.
FIG. 1 is an elevation view, partially in section, of this embodiment, along the line I-I of FIG. 2.
FIG. 2 is a cross-sectional view along the line II-II of FIG. 1.
The balance staff for a Roskopf watch, illustrated in 5 part in the drawing, is denoted generally by the reference numeral 1. As usually, it presents a plurality of portions of different diameters, i.e., the seat 2, to which is riveted the balance (not shown), an intermediary portion 3, the
3,469,392 Patented Sept. 30, 1969 arbor 4 and the pivot-shank 5, followed by the pivot 6 partially illustrated.
A collet 7, split as at 8, distinct from the usual collet (not shown) serving for fixing the inner end of the hairspring, is driven on the balance staff 1, or more precisely on its arbor 4. The collet 7, which may be made of brass, has a height approximately equal to the sum of the heights of the arbor 4 and of the pivot-shank 5, and presents in its lower portion a chamber or recess 9 in which is accommodated the finger 10. The latter is driven on the pivotshank 5 and is oriented in the correct angular position by the collet 7. The split 8 of the collet 7 is indeed just wide enough to form a passage for the arm of the finger 10. As concerns the portion of the split 8 situated above the finger 10, it is adapted to cooperate with the guard-pin (not shown) of the fork.
While I have described and illustrated one embodiment of my invention, it is to be understood that numerous modifications will become readily apparent to those skilled in the art without departing from the spirit of the invention.
What is claimed is:
1. In a balance staff for a Roskopf watch adapted to cooperate with a guard pin of a fork and a finger performing the functions of a roller jewel of a lever escapement, the improvement comprising said staff having an arbor, a split collet driven on said arbor, said collet having an inner chamber in communication with the split, said finger being mounted in said chamber and extending through said split, thus ensuring the exact position of said finger, whereas the split of the collet is adapted to cooperate with the guard pin of the fork.
2. A balance staff as claimed in claim 1 wherein said balance staff has a pivot shank adjacent said arbor, said finger being mounted on said pivot shank, said collet having a height which is approximately equal to the sum of the heights of said arbor and of the pivot shank.
3. A balance staff as claimed in claim 1 wherein said collet chamber is at one end of said collet and surrounds said pivot shank in spaced relation thereto, and said finger comprises a support collar mounted on said pivot shank and housed within said chamber.
References Cited UNITED STATES PATENTS 3,335,562 8/1967 Schneider 58-121 FOREIGN PATENTS 358,360 12/1905 France. 129,930 1/1929 Switzerland. 15 6,802 11/1932 Switzerland.
RICHARD B. WILKINSON, Primary Examiner S. A. WAL, Assistant Examiner
US761735A 1967-10-10 1968-09-23 Balance staff for a roskopf watch Expired - Lifetime US3469392A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1413367A CH484463A (en) 1967-10-10 1967-10-10 Balance axis for Roskopf watch

Publications (1)

Publication Number Publication Date
US3469392A true US3469392A (en) 1969-09-30

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US761735A Expired - Lifetime US3469392A (en) 1967-10-10 1968-09-23 Balance staff for a roskopf watch

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US (1) US3469392A (en)
CH (2) CH484463A (en)
DE (1) DE1798228B1 (en)
GB (1) GB1228188A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678683A (en) * 1971-02-26 1972-07-25 Gen Time Corp One-piece roller-impulse member for timepiece escapement
US3791251A (en) * 1972-06-05 1974-02-12 Bunker Ramo Timepiece escapement
US20090168611A1 (en) * 2007-12-28 2009-07-02 Gigandet Christophe Driving and transmitting element for an escapement, roller table and escapement equipped with them, and timepiece including them
US20200159170A1 (en) * 2018-11-19 2020-05-21 Eta Sa Manufacture Horlogère Suisse Mechanical timepiece with an animated display

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602007008121D1 (en) * 2007-12-28 2010-09-09 Chopard Manufacture Sa Driving and transmission member for a Hemmungsmechanimus, equipped with plate and escapement and equipped with this movement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR358360A (en) * 1905-10-09 1906-02-12 Fred Mcintyre Device for fixing watch balances on their axis
CH129930A (en) * 1927-12-08 1928-11-15 Tavannes Watch Co Sa A method of assembling constituent parts of timepieces on the axis of said mobile and timepiece mobile obtained according to this process.
CH156802A (en) * 1931-08-26 1932-08-31 Tavannes Watch Co Sa Balance axis with double plate.
US3335562A (en) * 1965-03-03 1967-08-15 Tissot Horlogerie Anchor escapement for timepieces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR358360A (en) * 1905-10-09 1906-02-12 Fred Mcintyre Device for fixing watch balances on their axis
CH129930A (en) * 1927-12-08 1928-11-15 Tavannes Watch Co Sa A method of assembling constituent parts of timepieces on the axis of said mobile and timepiece mobile obtained according to this process.
CH156802A (en) * 1931-08-26 1932-08-31 Tavannes Watch Co Sa Balance axis with double plate.
US3335562A (en) * 1965-03-03 1967-08-15 Tissot Horlogerie Anchor escapement for timepieces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678683A (en) * 1971-02-26 1972-07-25 Gen Time Corp One-piece roller-impulse member for timepiece escapement
US3791251A (en) * 1972-06-05 1974-02-12 Bunker Ramo Timepiece escapement
US20090168611A1 (en) * 2007-12-28 2009-07-02 Gigandet Christophe Driving and transmitting element for an escapement, roller table and escapement equipped with them, and timepiece including them
US8118480B2 (en) 2007-12-28 2012-02-21 Chopard Technologies Sa Driving and transmitting element for an escapement, roller table and escapement equipped with them, and timepiece including them
US20200159170A1 (en) * 2018-11-19 2020-05-21 Eta Sa Manufacture Horlogère Suisse Mechanical timepiece with an animated display

Also Published As

Publication number Publication date
GB1228188A (en) 1971-04-15
DE1798228B1 (en) 1971-11-04
CH1413367A4 (en) 1969-09-15
CH484463A (en) 1969-09-15

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