US2709332A - Overwind preventer for timepiece - Google Patents

Overwind preventer for timepiece Download PDF

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Publication number
US2709332A
US2709332A US226361A US22636151A US2709332A US 2709332 A US2709332 A US 2709332A US 226361 A US226361 A US 226361A US 22636151 A US22636151 A US 22636151A US 2709332 A US2709332 A US 2709332A
Authority
US
United States
Prior art keywords
spring
lever
pin
oscillating weight
timepiece
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
US226361A
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English (en)
Inventor
Meyer Friedrich
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.)
Felsa A G
FELSA AG
Original Assignee
Felsa A G
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 Felsa A G filed Critical Felsa A G
Application granted granted Critical
Publication of US2709332A publication Critical patent/US2709332A/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
    • G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding
    • G04B9/02—Devices controlled by such state, e.g. device affording protection means against overwinding
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/24—Protecting means preventing overwinding
    • G04B5/245—Protecting means preventing overwinding by locking the moving weight

Definitions

  • My invention relates to timepiece movements and particularly to a movement with an autorr .tic winding mechanism including a lockable oscillating weight.
  • timepiece watches, clocks etc.
  • provisions must be made to prevent the -2 in temperature, influence the motor spring in such a way that the spring is wound to only halt the desired value so that the timepiece may have a reserve of power ot ⁇ only ten to twenty hours.
  • a further object of my invention is to provide a snap mechanism as a locking device to positively engage the oscillating weight.
  • Another object is to provide a movement in which the dilierential gear bends a spring in both directions of rotation of a drivenmember so that the spring releases a snap leverthen swung by the spring, the lever locking the oscillating weight in the one direction of rotation of said driven member and releasing the weight in the other direction of rotation of said driven member.
  • Fig. 2 is a section along the line A-B of Figure l.
  • Fig. 3 is a plan view of a detail
  • Fig. 4 is a sectoinal view along the line F-G-H of Figure l.
  • Figure 5 is a plan view at an enlarged scale of a detail.
  • Figure 6 is a plan view of a portion of a movement in accordance with a modified form of the invention.
  • Fig. 7 is a section along the line I-K of Fig. 6.
  • a pinion 2 is rigidly connected with the barrel 1, while a pinion 3 or" the same diameter and number of teeth as pinion 2 is rigidly fixed to the barrel arbor 4.
  • the pinion 2 is permanently in mesh with the drive wheel 5 loosely mounted on a shoulder 6 of the pillar plate 7 while the pinion 3 engages a drive wheel 8 of the same diameter and number of teeth as wheel 5.
  • Wheel 8 coaxial to wheel 5 is in rigid connection with a sun wheel 9 and, together with the latter, revolvably mounted on the sleeve 1li which rotates around a pin 11 lixed to the pillar plate
  • the sun wheel 12 is rigidly fixed to the sleeve 1).
  • Two intermeshing planet wheels 13 having equal diameters and numbers of teeth are revolvably mounted on the drive wheel 5.
  • a disk 14 with a cam 15 is rigidly attached to the sleeve 10 constituting the driven member of the differential gear.
  • a pinion 38 is fixed to the outer end of the sleeve 10 and drives a hand l by means of a toothed wheel 16, the hand 17 indicating the development condition or degree of tension of the motor spring (not shown) located in the barrel 1.
  • the differential gear rotates disk 14 with cam 15 either in the anticlockwise or clockwise direction of Fig. l.
  • a lever 2li is revolt/'ably mounted on a pin 19 of the pillar plate 7 at such a friction resistance that it cannot rotate by itself.
  • a spring 22 is attached on the collar 21 of the lever 2d.
  • the collar 2 is flattened as at 39 (Fig. 3) and the wall of the hole of spring 22 has a corresponding even portion so that the spring 22 cannot turn relatively to the lever 2d.
  • the lever 26 is at the same level with the control cam l5 of disk l-/i so that it can be opdescribed later on.
  • the spring 22- comprises two portions 23 and 2li which, in relieved condition, are practically straight-lined. They are connected with each other by a curved portion 25 which provides for a favorable detormability of the spring 22.
  • the portion 23 of spring 22 traverses with play an opening 2o of the iiattened portion 27 of a pin fixed to the locking or snap lever 2S, this pin permanently coupling the spring 22 with the lever 2S.
  • the latter is pivoted on the pillar plate 7 by means or" the pin 29.
  • Pin 29 carries a stop pin 30 against which abuts the end of spring 2:2 from the one side (Fig. l).
  • Lever 218 is formed with a bend as indicated at 31 and its free end lies at the level of the oscillating weight 1S. This free end has two recesses 32 and 33 and the oscillating weight 18 carries at its ends pins 3d. and 35 respectively.
  • Recess 33 and pin 34, as well as recess 32 and pin 3S form each the halves of two couplings, engaging each other for locking the oscillating weight 13.
  • the snap lever 28 has stop faces 36 and 37 to cooperate with the pin 34 or 35 respectively in order to return the snap lever 2S, which has before been swung by the spring 22 in the anticlockwise direction, in the clockwise direction far enough to allow either the pin 34 to engage the recess 33 or the pin 35 to mesh with the recess 32.
  • the weight 18 can now oscillate and wind up the motor spring in the barrel l. While the above phenomena occurred, cam 1S became free to pass by the lever 29 into the right-hand c dotted end position of Fig. l. After lever 28 having struck against the external stop (not shown) the spring 22 has completely stretched itself and thereby slightl returned the lever Ztl in the clockwise direction so that its free end lies again in the path of earn l5. The cam 15 is now on the right of lever 23 and spring 2?. lies at the opposite side of stop 30.
  • Figs. 6 and 7 show another shape and position of the snap lever 23a. While in the example of Figs. l to 4 the recesses 32 and 33 are provided on that end of the twoarrned lever 2S, which is turned away from the disk 14, the coupling half of the one-armed lever 2da of Figs. 6 and 7 is in the shape of a pin 4t) mounted on that end of lever which is turned towards the disk 14. According to the momentary position of the oscillating weight i8, the other coupling half is constituted by one of several recesses 41 distributed along the inner edge of the weight 18.
  • An overwind preventer for a timepiece comprising oscillating weight winding mechanism including a barrel and a barrel arbor, a diterential gear operatively connected between the barrel and the barrel arbor, locking means for the oscillating weight, a spring, a stop for the spring, operating means connected with the diierential ear to move the spring past the stop, and a snap action locking lever swung by the spring locking the oscillating weight in the one direction of the diierential gear and unlocking the oscillating weight in the opposite direction of the differental gear.
  • An overwind preventer tor a timepiece comprising oscillating weight winding mechanism including a barrel and a barrel arbor, a differential gear operatively connected between the barrel and the barrel arbor, locking means for the oscillating weight, a spring, operating means connected with the ditterential gear to move the spring, a snap action locking lever for the oscillating weight, the spring permanently coupled with the snap action locking lever, and a stop positioned within the axis of rotation of the locking lever, the spring adapted to contact the stop and bend to thereby pass the stop whereby the locking lever is moved to and away from the oscillating weight depending upon the direction of rotation of the diferential gear.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Toys (AREA)
  • Gears, Cams (AREA)
  • Springs (AREA)
US226361A 1951-03-14 1951-05-15 Overwind preventer for timepiece Expired - Lifetime US2709332A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH288209T 1951-03-14
CH2709332X 1951-03-14
CH1061775X 1951-03-14
CH709774X 1951-03-14
CH868576X 1951-03-14

Publications (1)

Publication Number Publication Date
US2709332A true US2709332A (en) 1955-05-31

Family

ID=61598400

Family Applications (1)

Application Number Title Priority Date Filing Date
US226361A Expired - Lifetime US2709332A (en) 1951-03-14 1951-05-15 Overwind preventer for timepiece

Country Status (5)

Country Link
US (1) US2709332A (de)
CH (1) CH288209A (de)
DE (1) DE868576C (de)
FR (1) FR1061775A (de)
GB (1) GB709774A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903845A (en) * 1954-09-08 1959-09-15 Paul E Reymond Winding up mechanism for time-pieces
US2903844A (en) * 1954-07-10 1959-09-15 Paul E Reymond Winding up mechanism for time-pieces
US2948108A (en) * 1954-09-14 1960-08-09 Felsa S A Overwind preventer for timepiece
US20160026152A1 (en) * 2014-07-22 2016-01-28 Montres Breguet Sa Timepiece barrel with improved transmission of force
US20220382217A1 (en) * 2019-10-25 2022-12-01 Patek Philippe Sa Geneve Timepiece comprising a vibration-amplifying device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH328136A (de) * 1954-09-14 1958-02-28 Felsa Ag Uhrwerk mit einer eine arretierbare Masse aufweisenden automatischen Aufzugvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US332023A (en) * 1885-12-08 Self-winding watch
CH75789A (de) * 1916-10-28 1917-09-17 Einrichtung zur Vermeidung von Überspannungen und Brüchen beim Aufziehen von Federkraftwerken, insbesondere Uhren
CH155515A (fr) * 1931-03-23 1932-06-30 Marchand Adamir Pièce d'horlogerie à remontage automatique.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US332023A (en) * 1885-12-08 Self-winding watch
CH75789A (de) * 1916-10-28 1917-09-17 Einrichtung zur Vermeidung von Überspannungen und Brüchen beim Aufziehen von Federkraftwerken, insbesondere Uhren
CH155515A (fr) * 1931-03-23 1932-06-30 Marchand Adamir Pièce d'horlogerie à remontage automatique.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903844A (en) * 1954-07-10 1959-09-15 Paul E Reymond Winding up mechanism for time-pieces
US2903845A (en) * 1954-09-08 1959-09-15 Paul E Reymond Winding up mechanism for time-pieces
US2948108A (en) * 1954-09-14 1960-08-09 Felsa S A Overwind preventer for timepiece
US20160026152A1 (en) * 2014-07-22 2016-01-28 Montres Breguet Sa Timepiece barrel with improved transmission of force
US9513601B2 (en) * 2014-07-22 2016-12-06 Montres Breguet S.A. Timepiece barrel with improved transmission of force
US20220382217A1 (en) * 2019-10-25 2022-12-01 Patek Philippe Sa Geneve Timepiece comprising a vibration-amplifying device

Also Published As

Publication number Publication date
DE868576C (de) 1953-02-26
GB709774A (en) 1954-06-02
FR1061775A (fr) 1954-04-15
CH288209A (de) 1953-01-15

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