US2707371A - Watch with both a selfwinding and a manually winding mechanism - Google Patents

Watch with both a selfwinding and a manually winding mechanism Download PDF

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Publication number
US2707371A
US2707371A US390134A US39013453A US2707371A US 2707371 A US2707371 A US 2707371A US 390134 A US390134 A US 390134A US 39013453 A US39013453 A US 39013453A US 2707371 A US2707371 A US 2707371A
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United States
Prior art keywords
pinion
ratchet
gear
watch
selfwinding
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Expired - Lifetime
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US390134A
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English (en)
Inventor
Kocher Hans
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Buren Watch Co SA
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Buren Watch Co SA
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Filing date
Publication date
Application filed by Buren Watch Co SA filed Critical Buren Watch Co SA
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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
    • G04B7/00—Combined normal and automatic winding up

Definitions

  • This invention relates to selfwino'ing watches with a manually winding mechanism, in particular to watches in which the ratchet wheel is driven by two independent trains of gear-wheels forming part each of one of said windin g mechanisms.
  • a first device is provided for unclutching at least a part of the organs of the seltwinding mechanism, when the watch is wound up manually
  • a second device is provided for unclutching at least a part of the manually winding means, when the watch is wound up by the selfwinding mechanism.
  • a seltwinding mechanism comprising pawls and ratchets
  • unclutching of the selfwinding mechanism is ensured by these pawls.
  • Swiss Patent 247,760 shows a free-wheel mechanism inserted in the train of gear-wheels which forms part of the selfwinding mechanism. Such a free-wheel renders, however, the construction of the watch more dicult and therefore more expensive.
  • the device which unclutches the manually winding mechanism is commonly constituted by the yoke spring which shifts the clutch-wheel.
  • the seltwinding mechanism thus drives not only the ratchet of the barrel but also the crown wheel, the winding pinion mounted around the winding stem, the Breguet toothing of this latter pinion thereby moving the clutch wheel to and fro along the square portion of the winding stem, against the action or the yoke spring, when the watch is wound up by the selfwnding mechanism.
  • the friction of these organs (crown wheel, winding pinion, clutch-wheel, yoke) as well as the action of the yoke spring uselcssly overburden the selfwinding mechanism and cause a material decrease of its efficiency.
  • the Swiss Patent No. 267,734 shows the crown wheel pivoted on an independent roel-:er which swings around an axle xed with respect to the watch movement.
  • the spring-loaded detent which usually acts on the ratchet wheel, cooperates here with the crown wheel and is arranged to urge the crown wheel and its rocker in such a direction as to keep this wheel in meshing relation with the ratchet. in this construction the selfwinding mechanism, if operating, is still overburdened by the spring of the detent against the action of which it must throw the crown wheel with its rocker out of gear with the ratchet wheel of the barrel.
  • the Swiss Patent No. 274,012 has provided still another construction in which a gear permanently meshes with the ratchet and a companion pinion permanently meshes with the crown wheel, this companion pinion being mounted on a rocker rotatably mounted coaxially to the crown wheel.
  • a spring urges this rocker in such a direction that the companion pinion is disconnected from the gear which is in meshing relation with the ratchet wheel and keeps this companion pinion usually in this position, the crown being thus unclutched from the ratchet wheel.
  • Fig. 1 is a partial plan view oi the watch with the selfwinding mechanism in. clutched position and the manually winding mechanism in unclutched position;
  • Fig. 2 is a cross-section along line lil of Fig. 1;
  • Fig. 3 is a view analogous to that of Fig. l but showing other details than those represented in Fig. 1, and the manually winding mechanism being in clutched position;
  • Fig. 4 is a cross-section along line 1V-lV of Fig. 3;
  • Fig. 5 is a part sectional view along line V-V of Fig. 2;
  • Fig. 6 is a plan view of a part f frame removed from the watch and to Figs. 1 and 3, and
  • Fig. 7 shows the remaining part of the watch movement when the unit shown in Fig. 6 has been taken away.
  • the numeral 1 designates the base-plate of the watch movement onto which the barrel bridge 2 is xed.
  • a circular countersink 3 (Pius. 2 and 7) is provided in the lower surface of bridge 2, in order to locate therein the barrel 4 the arbor 5 of which is pivoted in the base-plate 1 and the bridge 2.
  • a ratchet wheel 6 is carried by arbor 5 and it is angularly secured thereto by means of a square portion 7 provided on the arbor.
  • a further circular countersink 8 (Figs. 2 and 7) is provided in the upper surface of bridge 2 in order to locate therein the crown wheel 9 which is axially held in place by the usual flat-headed screw 10. This wheel 9 freely rotates around a ring 11 of an appropriate metal, which is set with snug tit around a tubular projection 12 of bridge 2.
  • T he crown wheel 9 is as usual in meshing relation with a winding pinion freely rotatable around the Winding stem, the two latter elements being not represented' in the drawing.
  • the wheel 9 meshes on the other hand with a gear 13 pivoted in the base-plate 1 and an upper bridge 14 (see also Fig. 6).
  • the axle of this gear passes through a circular bore 32 provided in bridge 2.
  • Gear 13 is, in turn, always in meshing relation with a wig-Wag pinion 15 the pivots of which are guided within two slots 16 provided in the barrel bridge 2 and the upper bridge 14, respectively.
  • Slots 16 are arcuate concentrically to the axis of gear 13 and pinion 15 is arranged in order to be able to come into meshing relation with the ratchet wheel 6.
  • the winding stem with the clutch-wheel and the winding pinion (not shown), as well as the crown wheel 9, gear 13 and pinion 15, constitute together the manual winding mechanism.
  • gear 17 (Fig. 2) and a wig-Wag pinion 1S belonging to the selfwinding mechanism.
  • Gear 17 is always driven into the same direction by an appropriate mechanism (not shown), comprising for instance a rockable weight pivotally mounted around a fixed axle and carrying a coaxial pinion which drives gear 17 by means of a mechanism well known in the art, which transmits unidirectional drives to gear 17 under the control of the reversible movements of the rockable weight.
  • a suitable mechanism of this type is represented in the Swiss Patent No. 233,899 in which the wheel 3 may be identified with gear 17 of the present construction.
  • Gear 17 carries a coaxial pinion 19 permanently in meshing relation with pinion 18 the pivots of which are guided within two slots 20 (Figs. 1 and 6) provided in the upper bridge 14 and in an intermediate bridge 21, respectively.
  • This bridge 21 is iixed to bridge 14 by means of steady pins 22 and screws 23.
  • An elongated countersink 24 (Figs. 3 and 6) as well as a deeper circular countersink 34 are provided in the lower surface of bridge 14.
  • a two-armed spring 25 is located within countersinks 24 so that the longer arm of this spring extends outside countersink 24, into countersink 34. Spring 25 is so arranged as to be already slightly bent when its two arms lean against the side walls of countersink 24.
  • the unit formed by both bridges 14 and 21, represented in Fig. 6, is fixed on to base-plate 1 by means of two screws 26 which engage each an ear 27 provided on bridge 14 (see also Fig. 4). The relative position of the said unit with respect to the base-plate is secured by two steady pins
  • the leaf spring 29 prevents the manual winding mechanism (gear 13, crown wheel 9, winding pinion, clutch wheel and winding stem) from moving with ratchet 6 when the latter is driven by the selfwinding mechanism.
  • Spring 29, is, indeed, so adjusted as to increase the frictional resistance of the manual winding mechanism in such a way that the said couple of forces acting on pinion 15 will doubtlessly be strong enough in order to throw pinion 15 ont of gear with ratchet 6.
  • the crown wheel 9 When the watch is wound up manually, the crown wheel 9 is driven by means of the winding pinion and the winding stem (not shown) in the direction indicated by the arrow (Fig. l).
  • the movement of gear 13 drives the wig-Wag pinion 15 iirstly into meshing relation with ratchet 6 which will then also be driven in the direction of the arrow.
  • the ratchet 6 may be considered as driving element and pinion 19 is substantially at rest with respect to ratchet 6, even if the rockable weight (not shown) moves during manually winding the watch.
  • the wig-Wag pinion 18 which is in the position shown in Fig. l at the beginning of the manually winding operation, is subjected to a couple of forces which cause its pivots to travel along slots 2t) until pinion 18 no longer meshes with the ratchet 6 which thus rotates without driving pinion 19.
  • spring 25 Since spring 25 is set in place in countersink 24 already with a small tension, its tension gets increased and this spring prevents the pinion 1S from denitely leaving the ratchet 6. In other words, the pinion 18 oscillates within slots 2t) under the action of spring 25 in order to allow the teeth of ratchet 6 to jump freely over those of pinion 18, when the watch is wound up manually.
  • ratchet 6, wigwag pinion 15 and gear 1 3 are arranged in such a way that their axes deline two intersecting planes so that the angle between them is comprised between and 180 provided that this angle be measured from ratchet 6 to gear 13 in the winding direction of ratchet 6 as indicated by the arrow (Fig. l).
  • Pinion 15 does not necessarily require to be driven back into meshing relation with ratchet 6 by a spring like pinion 18, since gear 13 rotates at a relative high speed while winding the watch manually and the pinion 15 cornes into meshing relation with ratchet 6 without any noticeable delay.
  • a circular opening 35 is provided in bridge 1 4 in order to allow spring 25 to be checked in particular to see whether it has broken.
  • each train comprises a driving pinion and a wigawag pinion having an axle guided by part circular slots concentric to the driving pinion of the train which drives said wig-Wag pinion, these slots being provided in the frame of the movement and so arranged that, on the one hand, the Wig-Wag pinion of each train is in clutched position for driving said ratchet wheel, when its axle is in one extreme position within said slots, and, on the other hand, the ratchet throws the wig-Wag pinion of one train out of gear when this ratchet is driven by the other train.
  • the manually winding mechanism comprises a crown Wheel, a gear driven by said crown wheel and a wig-Wag pinion driven by said gear and being in meshing relation with the ratchet wheel when this wig-Wag pinion is in one of its extreme positions, the axes of the ratchet, this wig-Wag pinion and said gear thereby being so arranged that the two planes they define and which intersect each other along the axis of the wig-Wag pinion, form an angle ranging between 90 and 180, when this angle is measured from the ratchet to said gear.
  • the frame of the watch movement comprising a base-plate, a barrel bridge on said base-plate, an intermediate bridge on said barrel bridge and an upper bridge on said intermediate bridge for pivoting at least partially the elements of the winding mechanisms, both the intermediate bridge and the upper bridge constituting a unit fixed directly to the base-plate.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US390134A 1952-11-06 1953-11-04 Watch with both a selfwinding and a manually winding mechanism Expired - Lifetime US2707371A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2707371X 1952-11-06
CH305464T 1952-11-06

Publications (1)

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US2707371A true US2707371A (en) 1955-05-03

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US390134A Expired - Lifetime US2707371A (en) 1952-11-06 1953-11-04 Watch with both a selfwinding and a manually winding mechanism

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US (1) US2707371A (fr)
CH (1) CH305464A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977749A (en) * 1957-05-29 1961-04-04 Ebauches Sa Transmission device for time meters
US2982084A (en) * 1957-05-29 1961-05-02 Ebauches Sa Alarm device
EP3361323A1 (fr) 2017-02-13 2018-08-15 Rolex Sa Système de remontage de pièce d'horlogerie
JP2019132652A (ja) * 2018-01-30 2019-08-08 セイコーインスツル株式会社 巻上力伝達機構、ムーブメント、及び機械式時計
US20220206440A1 (en) * 2020-12-29 2022-06-30 The Swatch Group Research And Development Ltd Embedded winding mechanism for a watch

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977749A (en) * 1957-05-29 1961-04-04 Ebauches Sa Transmission device for time meters
US2982084A (en) * 1957-05-29 1961-05-02 Ebauches Sa Alarm device
EP3361323A1 (fr) 2017-02-13 2018-08-15 Rolex Sa Système de remontage de pièce d'horlogerie
US11112757B2 (en) 2017-02-13 2021-09-07 Rolex Sa System for winding a timepiece
JP2019132652A (ja) * 2018-01-30 2019-08-08 セイコーインスツル株式会社 巻上力伝達機構、ムーブメント、及び機械式時計
US20220206440A1 (en) * 2020-12-29 2022-06-30 The Swatch Group Research And Development Ltd Embedded winding mechanism for a watch

Also Published As

Publication number Publication date
CH305464A (fr) 1955-02-28

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