EP0853264A2 - Chronographuhr mit einem Mechanismus mit reduzierter Höhe - Google Patents

Chronographuhr mit einem Mechanismus mit reduzierter Höhe Download PDF

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Publication number
EP0853264A2
EP0853264A2 EP97100334A EP97100334A EP0853264A2 EP 0853264 A2 EP0853264 A2 EP 0853264A2 EP 97100334 A EP97100334 A EP 97100334A EP 97100334 A EP97100334 A EP 97100334A EP 0853264 A2 EP0853264 A2 EP 0853264A2
Authority
EP
European Patent Office
Prior art keywords
wheel
chronograph
reset
counter
seconds
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.)
Withdrawn
Application number
EP97100334A
Other languages
English (en)
French (fr)
Other versions
EP0853264A3 (de
Inventor
Erik Favre
Alphonse Bron
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.)
ETA SA Manufacture Horlogere Suisse
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA AG
Eta SA Fabriques dEbauches
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 Ebauchesfabrik ETA AG, Eta SA Fabriques dEbauches filed Critical Ebauchesfabrik ETA AG
Priority to EP97100334A priority Critical patent/EP0853264A3/de
Publication of EP0853264A2 publication Critical patent/EP0853264A2/de
Publication of EP0853264A3 publication Critical patent/EP0853264A3/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph

Definitions

  • the present invention relates to a chronograph watch with analog display whose mechanism is arranged so that the height is reduced.
  • the present invention relates more precisely to a special arrangement of the reset mechanism reducing the thickness of the movement of chronograph.
  • the resetting of a counter is generally carried out at by means of a set of rockers and levers and a hammer acting on a reset heart, said heart generally supporting a training finger and being rotated on the same axis as that of the wheel and the needle of said counter.
  • the present invention aims to obtain an additional gain in thickness thanks to a particular arrangement of the reset core of minus a counter.
  • the invention relates to a chronograph watch with analog display including a movement and a chronograph mechanism comprising on a dial with several counters driven by a wheel clutchable on a PTO of the movement, said mechanism can be reset to zero by actuation of levers and hammers acting on each surrender heart to zero associated with the wheels of the respective counters, characterized in that at least one reset core is off-center with respect to the associated counter wheel in being pivoted on the axis of an additional wheel meshing with said counter wheel being in a 1/1 ratio with it.
  • This construction is applicable to a counter any but find the preferred application for the reset a counter in the center of the dial to display of the seconds using the hand chronograph by providing a height gain at the place where it is most useful, corresponding substantially to the thickness of the heart.
  • this additional wheel can introduce a frolic which can easily be reduced by the use of a specially adapted gear profile.
  • taking force is achieved by a wheel driven on the axis of the seconds wheel of the basic movement.
  • the chronograph watch which will be described comprises in a known manner a watch, mechanical or electronic to display on a dial, a share the current time using two hands in the center and a small second at 9 o'clock, on the other hand a time timed using a chronograph hand at center, a minute counter at 3 o'clock and a counter hours at 6 o'clock, this distribution on the dial of the small seconds, counters and their number can obviously be modified at the option of the manufacturers.
  • the watch movement represented schematically by block 1 has at its outlet at least one axis of force corresponding to the second 2 axis secured to a wheel seconds 3 engaged with an intermediate wheel 4 supported by an axis 5 pivoted between an upper plate 6 and a lower plate 7.
  • the intermediate wheel 4 is engaged with a wheel 8, in a 1/1 ratio with the wheel 3, to drive the small seconds hand by through an axis 9.
  • Axis 5 also supports a sliding pinion 11 which can engage by friction with the wheel 4 when starting the chronograph.
  • This clutch is controlled by means known by actuation of a pusher carried by the housing and acting on a set of levers and springs not represented.
  • This pinion 11 is in engagement with the wheel of chronograph 39, which is in a 1/1 ratio with the wheel 3 and which is supported by a driving shaft 13 the chronograph hand for display 40 of the second.
  • the chronograph wheel 39 has along of the shaft 13 only one other pinion 14, held by a elastic washer 15 bearing against an annular rim 16 of the shaft 13, and serving as a PTO for a intermediate wheel 17 driving the other counters 20, 30.
  • a reduction pinion 18 mounted on the axis of the intermediate wheel 17, is engaged in a hand with the minute wheel 19, on the other hand with a gear train consisting of wheels and pinions associates 25, 26 and 27, 28 causing the counter of 29 hours.
  • the delivery to zero of the minute counter hand 20 and the hour counter hand 30 is made so usual by reset hearts rotated on the same axes as the wheels 19, 29.
  • the heart of resetting the chronograph hand 41 is not supported by the shaft 13 of the chronograph wheel 39 but by the axis 38 of an additional wheel 37, engaged with said chronograph wheel 12 and having with it a 1/1 ratio.
  • This construction therefore makes it possible to obtain center of movement gain in height substantially equal to the thickness of the core 41, that is to say at a place particularly desirable to reserve a space necessary for the other cogs in the movement that drive the canons of the display of the current time.
  • This construction results from this construction according to the invention a more judicious distribution of reset hearts at the periphery, allowing in consequence of simplifying the design of levers and hammers (not shown) which will act on them, or to adapt other devices more easily such as that described in the document US 5,113,382 already cited.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
EP97100334A 1997-01-10 1997-01-10 Chronographuhr mit einem Mechanismus mit reduzierter Höhe Withdrawn EP0853264A3 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97100334A EP0853264A3 (de) 1997-01-10 1997-01-10 Chronographuhr mit einem Mechanismus mit reduzierter Höhe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97100334A EP0853264A3 (de) 1997-01-10 1997-01-10 Chronographuhr mit einem Mechanismus mit reduzierter Höhe

Publications (2)

Publication Number Publication Date
EP0853264A2 true EP0853264A2 (de) 1998-07-15
EP0853264A3 EP0853264A3 (de) 1999-11-24

Family

ID=8226363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100334A Withdrawn EP0853264A3 (de) 1997-01-10 1997-01-10 Chronographuhr mit einem Mechanismus mit reduzierter Höhe

Country Status (1)

Country Link
EP (1) EP0853264A3 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113382A (en) 1990-04-12 1992-05-12 Eta Sa Fabriques D'ebauches Chronograph watch
US5280460A (en) 1990-05-21 1994-01-18 Eta S.A. Fabriques D'ebauches Gear mechanism especially for timepiece

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US234768A (en) * 1880-11-23 Carl gantzhoen
CH273743A (fr) * 1948-08-26 1951-02-28 Rolex Montres Pièce d'horlogerie avec compteurs d'heures et de minutes.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113382A (en) 1990-04-12 1992-05-12 Eta Sa Fabriques D'ebauches Chronograph watch
US5280460A (en) 1990-05-21 1994-01-18 Eta S.A. Fabriques D'ebauches Gear mechanism especially for timepiece

Also Published As

Publication number Publication date
EP0853264A3 (de) 1999-11-24

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