US2673443A - Self-winding timepiece mechanism - Google Patents

Self-winding timepiece mechanism Download PDF

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Publication number
US2673443A
US2673443A US225370A US22537051A US2673443A US 2673443 A US2673443 A US 2673443A US 225370 A US225370 A US 225370A US 22537051 A US22537051 A US 22537051A US 2673443 A US2673443 A US 2673443A
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Prior art keywords
wheel
gear
transfer
transfer wheels
timepiece mechanism
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Expired - Lifetime
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US225370A
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Schmitz Otto
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Individual
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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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/10—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited
    • G04B5/14—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited acting in both directions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19172—Reversal of direction of power flow changes power transmission to alternate path

Definitions

  • the present invention relates to a timepiece mechanism with a self-winding means comprising a mass oscillating about an axis having a gear-Wheel attached to the mass concentrically of the axis thereof, which gear-wheel meshes with a displaceable gear-wheel, which latter is arranged between two intermeshing transfer Wheels and, depending upon the swing of the swinging mass, meshes alternately with one or other of the transfer wheels and turnsit in the same direction, Whilst a pawl prevents the transfer wheels from turning backwards.
  • the annexed drawing shows two embodiments by way of example of a timepiece mechanism for pocket watches or wristlet watches.
  • Fig. 1 is a plan view of the timepiece mechanism according to one embodiment
  • Fig. 2 is a section on the line 2-2 of Fig. 1.
  • the oscillating mass I swings about the axis I a and is rigidly attached to the boss 2a of the gear-wheel 2, the boss being rotatably mounted in the bridgepiece 2b.
  • the gear-wheel 2 meshes with a small gear-wheel or intermediate gear 3 which is provided with a circular bore 3a in which an oval pin or supporting member 4 engages, so that the gear-wheel 3 can take up two different positions.
  • Two rotatable and inter-meshing transfer wheels 5 and 5 are arranged in front of the gear-wheel 3, so that the pitch circle of the transfer wheel 6 touches the pitch circle of the gear-wheel 3 when the latter is in one position and the pitch circle of the transfer wheel 5 touches the pitch circle of the gear-wheel 3 when the latter is in the opposite position.
  • the gear wheel 2 rolls the small wheel 3 towards the transfer wheel 6 and causes it to mesh therewith, until it is restrained by the oval pin 4 of the bore 3a and turns the transfer wheel in the direction of the arrow 8. If the mass swings counter-clockwise the little wheel 3 is brought into mesh with the transfer wheel 5 until it is restrained by the bore 3a and the pin 4 and turns the transfer wheel 5 in the direction of the arrow 9. The direction of rotation of the transfer wheels is the same.
  • a stop pawl 1 prevents the transfer wheels 5, 6 from turning backwards.
  • One of the transfer wheels is coupled through an intermediate wheel, not shown, with the trunnion of the spring housing, not shown, and winds up the spring.
  • the gear-wheel 3 is readily movable from engagement with one to the other of the transfer Wheels 5 and E.
  • the gear-wheel 3 is moved from one to the other of the transfer Wheels 5 and 6, by reason of the shorter length of the major axis 0f the Din 4 3S Compared with the diameter of the bore 3a of the gear-wheel 3.
  • lateral movement is 2 possible of the gear-wheel 3 with respect to a line between the center of the axis of the gear-wheel 2 and the center of the oval pin d, thereby facilitating the change-over of the gear-wheel 3 from one transfer Wheel to the other.
  • a disengageable transmission gearing for converting oscillatory motion to intermittent unidirectional motion comprising a gear wheel providing oscillatory motion, a pair of intermeshing transfer wheels, an intermediate gear having a bore and driven by the gear wheel and alternatively engaged with one or the other of the transfer wheels, and a supporting member of generally oval cross-sectional shape engaging in the bore of the intermediate gear permitting lateral movement of the intermediate gear with respect to a line between the center of the axis of the gear wheel and the center of the supporting member, whereby upon an oscillatory movement of the gear wheel the intermediate gear moves laterally from one to the other of the transfer wheels for the rotation thereof so that the transfer wheels rotate with an intermittent unidirectional motion.
  • a disengageable transmission gearing for converting oscillatory motion to intermittent unidirectional motion comprising a gear Wheel providing oscillatory motion, a pair of intermeshing transfer wheels, an intermediate gear having a bore and driven by the gear wheel and alternatively engaged with one or the other of the transfer wheels, and a supporting member of generally oval cross-sectional shape engaging in the bore of the intermediate gear permitting lateral movement of the intermediate gear with respect to a line between the center of the axis of the gear wheel and the center of the supporting member, the bore of the intermediate gear being of circular shape and having a diameter slightly larger than the major axis of the cross section of the supporting member, whereby upon an oscillatory movement of the gear wheel the intermediate gear moves laterally from one to the other of the transfer wheels for the rotation thereof so that the transfer wheels rotate with an intermittent unidirectional motion.

Description

March 30, 1954 o. SCHMITZ SELF-WINDING TIMEPIECE MECHANISM Filed May 9, 1951 Patented Mar. 30, 1954 UNITED STATES PATENT GFFICE Claims priority, application Switzerland May 10, 1950 2 Claims.
The present invention relates to a timepiece mechanism with a self-winding means comprising a mass oscillating about an axis having a gear-Wheel attached to the mass concentrically of the axis thereof, which gear-wheel meshes with a displaceable gear-wheel, which latter is arranged between two intermeshing transfer Wheels and, depending upon the swing of the swinging mass, meshes alternately with one or other of the transfer wheels and turnsit in the same direction, Whilst a pawl prevents the transfer wheels from turning backwards.
The annexed drawing shows two embodiments by way of example of a timepiece mechanism for pocket watches or wristlet watches.
Fig. 1 is a plan view of the timepiece mechanism according to one embodiment,
Fig. 2 is a section on the line 2-2 of Fig. 1.
The oscillating mass I swings about the axis I a and is rigidly attached to the boss 2a of the gear-wheel 2, the boss being rotatably mounted in the bridgepiece 2b. The gear-wheel 2 meshes with a small gear-wheel or intermediate gear 3 which is provided with a circular bore 3a in which an oval pin or supporting member 4 engages, so that the gear-wheel 3 can take up two different positions. Two rotatable and inter-meshing transfer wheels 5 and 5 are arranged in front of the gear-wheel 3, so that the pitch circle of the transfer wheel 6 touches the pitch circle of the gear-wheel 3 when the latter is in one position and the pitch circle of the transfer wheel 5 touches the pitch circle of the gear-wheel 3 when the latter is in the opposite position. If the mass moves clockwise, the gear wheel 2 rolls the small wheel 3 towards the transfer wheel 6 and causes it to mesh therewith, until it is restrained by the oval pin 4 of the bore 3a and turns the transfer wheel in the direction of the arrow 8. If the mass swings counter-clockwise the little wheel 3 is brought into mesh with the transfer wheel 5 until it is restrained by the bore 3a and the pin 4 and turns the transfer wheel 5 in the direction of the arrow 9. The direction of rotation of the transfer wheels is the same. A stop pawl 1 prevents the transfer wheels 5, 6 from turning backwards. One of the transfer wheels is coupled through an intermediate wheel, not shown, with the trunnion of the spring housing, not shown, and winds up the spring.
By reason of the generally oval cross-sectional shape .of the pin 4, the gear-wheel 3 is readily movable from engagement with one to the other of the transfer Wheels 5 and E. As may be seen from Figure 1, as the gear-wheel 3 is moved from one to the other of the transfer Wheels 5 and 6, by reason of the shorter length of the major axis 0f the Din 4 3S Compared with the diameter of the bore 3a of the gear-wheel 3. lateral movement is 2 possible of the gear-wheel 3 with respect to a line between the center of the axis of the gear-wheel 2 and the center of the oval pin d, thereby facilitating the change-over of the gear-wheel 3 from one transfer Wheel to the other.
What I claim is:
1. In a timepiece mechanism, a disengageable transmission gearing for converting oscillatory motion to intermittent unidirectional motion comprising a gear wheel providing oscillatory motion, a pair of intermeshing transfer wheels, an intermediate gear having a bore and driven by the gear wheel and alternatively engaged with one or the other of the transfer wheels, and a supporting member of generally oval cross-sectional shape engaging in the bore of the intermediate gear permitting lateral movement of the intermediate gear with respect to a line between the center of the axis of the gear wheel and the center of the supporting member, whereby upon an oscillatory movement of the gear wheel the intermediate gear moves laterally from one to the other of the transfer wheels for the rotation thereof so that the transfer wheels rotate with an intermittent unidirectional motion.
2. In a timepiece mechanism, a disengageable transmission gearing for converting oscillatory motion to intermittent unidirectional motion comprising a gear Wheel providing oscillatory motion, a pair of intermeshing transfer wheels, an intermediate gear having a bore and driven by the gear wheel and alternatively engaged with one or the other of the transfer wheels, and a supporting member of generally oval cross-sectional shape engaging in the bore of the intermediate gear permitting lateral movement of the intermediate gear with respect to a line between the center of the axis of the gear wheel and the center of the supporting member, the bore of the intermediate gear being of circular shape and having a diameter slightly larger than the major axis of the cross section of the supporting member, whereby upon an oscillatory movement of the gear wheel the intermediate gear moves laterally from one to the other of the transfer wheels for the rotation thereof so that the transfer wheels rotate with an intermittent unidirectional motion.
OTTO SCHMITZ.
References Cited in the file of this patent UNITED STATES PATENTS Lee May 8, 1951
US225370A 1950-05-10 1951-05-09 Self-winding timepiece mechanism Expired - Lifetime US2673443A (en)

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Application Number Priority Date Filing Date Title
CH2673443X 1950-05-10

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US2673443A true US2673443A (en) 1954-03-30

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490796A (en) * 1922-05-10 1924-04-15 Ulrik I T Blomberg Gearing
US1710631A (en) * 1926-07-16 1929-04-23 David Steel Alexander Unidirectional driving gear
US2536615A (en) * 1946-12-27 1951-01-02 Thiebaud Henri Automatic winding mechanism for watch movements
US2552288A (en) * 1949-04-05 1951-05-08 Lee Bertha Musical toy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490796A (en) * 1922-05-10 1924-04-15 Ulrik I T Blomberg Gearing
US1710631A (en) * 1926-07-16 1929-04-23 David Steel Alexander Unidirectional driving gear
US2536615A (en) * 1946-12-27 1951-01-02 Thiebaud Henri Automatic winding mechanism for watch movements
US2552288A (en) * 1949-04-05 1951-05-08 Lee Bertha Musical toy

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