US3775968A - Drive mechanism for a watch having a balance motor - Google Patents

Drive mechanism for a watch having a balance motor Download PDF

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Publication number
US3775968A
US3775968A US00157989A US3775968DA US3775968A US 3775968 A US3775968 A US 3775968A US 00157989 A US00157989 A US 00157989A US 3775968D A US3775968D A US 3775968DA US 3775968 A US3775968 A US 3775968A
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US
United States
Prior art keywords
wheel
pallet
lever
teeth
pallets
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
US00157989A
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English (en)
Inventor
P Tuetey
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.)
Les Fabriques dAssortiments Reunies SA FAR
Original Assignee
Les Fabriques dAssortiments Reunies SA FAR
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.)
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Application filed by Les Fabriques dAssortiments Reunies SA FAR filed Critical Les Fabriques dAssortiments Reunies SA FAR
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Publication of US3775968A publication Critical patent/US3775968A/en
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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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/02—Devices allowing the motion of a rotatable part in only one direction
    • G04B11/04—Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance

Definitions

  • the magnets may be placed in such a manner thatthey are of opposite polarity with respect to each other, so that there would then be an attraction instead of a repulsion, but the effect obtained could be made the same by suitable design.
  • FIGURE is a fragmentary plan view of an embodiment of a drive mechanism according to the invention.
  • a lever 1 is supported by a lever pivot 2 for cooperation with a drive or escapement wheel 3.
  • the drive mechanism consists of an escapement, having an inverse lever, i.e., the lever l, oscillated by a balance wheel motor of known form (not shown) which lever is adapted to turn the drive wheel 3 always in the same direction the wheel 3 operating, the indicator members or hands of the watch by the intermediary of a gear train of known form (not shown).
  • the drive and locking of the ratchet wheel 3 is effected by means of pallets'4 and 5, each fixed to, forming part of supported by a spring 6 which, in turn is fixed to the lever pivot 2, the pallets being capable of sliding in respective rectangular slots 7, 8 in the lever 1.
  • the pallets 4 and 5 are constituted by the turned-up ends of a thin wire spring 6.
  • each pallet 4, 5 When at rest, the spring 6 maintains each pallet 4, 5 in a predetermined position as shown in full lines in the drawing, at one end of its respective slot 7 and 8 respectively, of which is slightly inclined with respect to the periphery of the wheel near the slot.
  • the wheel 3 has a plurality, of radially extending teeth each of which has an end face 9 that is inclined to the radius of the respective tooth, the teeth being substantially uniformly shaped and spaced substantially equal to the width of a pallet.
  • the pallet 4 In the position shown in the drawing the pallet 4 is engaged between the sides of two adjacent teeth of the wheel 3, and thus ensures locking of the wheel, as lateral displacement of the pallet 4 is limited by one end of the slot 7.
  • the dimensions of the lever 1 are such that at the moment when the lever 1 starts to be driven by the balance wheel motor, the pallet 5, which is not engaged with the teeth of the wheel 3, starts to operate on the driveface 9 of a tooth of the wheel before the other pallet 4 is moved from between the teeth, and unlocks the wheel 3.
  • lever 1 may be held in its end positions against one or other of its limit .stops, by the use of permanent magnets, as hereinbefore described.
  • a drive mechanism for a watch having a balance motor comprising an inverse pallet lever and a toothed escapement wheel, said lever having a pair of spaced slots juxtaposed with the periphery of said wheel, resilient means fixed on said lever and carrying a pair of pallets respectively extending through said slots for engagement with the teeth of said wheel and movable longitudinally of the respective slots in a plane parallel with the plane of said lever, the teeth of said wheel extending radially thereof and having end faces substantially uniformly inclined to the radius of the respective tooth forengagement by said pallets to initiate rotation of said wheel, and said teeth being spaced a distance substantially equal to the width of a pallet to preclude play therebetween, engagement of the end face of a tooth by one pallet driving said wheel and causing movement of the other pallet in its slot until said other pallet is freed from the teeth between which it is engagmg.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Electromechanical Clocks (AREA)
  • Mechanical Control Devices (AREA)
US00157989A 1970-07-13 1971-06-29 Drive mechanism for a watch having a balance motor Expired - Lifetime US3775968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1056670A CH531736A (fr) 1970-07-13 1970-07-13 Encliquetage pour montre à balancier moteur

Publications (1)

Publication Number Publication Date
US3775968A true US3775968A (en) 1973-12-04

Family

ID=4364561

Family Applications (1)

Application Number Title Priority Date Filing Date
US00157989A Expired - Lifetime US3775968A (en) 1970-07-13 1971-06-29 Drive mechanism for a watch having a balance motor

Country Status (3)

Country Link
US (1) US3775968A (enrdf_load_stackoverflow)
JP (1) JPS5249339B1 (enrdf_load_stackoverflow)
CH (2) CH1056670A4 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956941A (en) * 1974-01-18 1976-05-18 Les Fabriques D'assortments Reunies Escapement-type drive mechanism for watches and the like
US20090154298A1 (en) * 2005-10-25 2009-06-18 Fromanteel Limited Clock

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR757820A (fr) * 1933-06-30 1934-01-05 Ets Japy Freres Perfectionnements aux mobiles d'échappement de montres, réveils, pendules, etc.
DE837221C (de) * 1950-02-14 1952-04-21 Uhrenfabrik Villingen J Kaiser Geraeuscharme Ankerhemmung von Uhren
US2717488A (en) * 1952-01-07 1955-09-13 Gen Horlogere Noiseless anchor-escapement, particularly for clock-works
US3183426A (en) * 1962-02-14 1965-05-11 Cons Electronics Ind Magnetically coupled constant speed system
US3248783A (en) * 1961-11-09 1966-05-03 Far Fab Assortiments Reunies Method of manufacture of a pin pallet fork of a timepiece

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR757820A (fr) * 1933-06-30 1934-01-05 Ets Japy Freres Perfectionnements aux mobiles d'échappement de montres, réveils, pendules, etc.
DE837221C (de) * 1950-02-14 1952-04-21 Uhrenfabrik Villingen J Kaiser Geraeuscharme Ankerhemmung von Uhren
US2717488A (en) * 1952-01-07 1955-09-13 Gen Horlogere Noiseless anchor-escapement, particularly for clock-works
US3248783A (en) * 1961-11-09 1966-05-03 Far Fab Assortiments Reunies Method of manufacture of a pin pallet fork of a timepiece
US3183426A (en) * 1962-02-14 1965-05-11 Cons Electronics Ind Magnetically coupled constant speed system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956941A (en) * 1974-01-18 1976-05-18 Les Fabriques D'assortments Reunies Escapement-type drive mechanism for watches and the like
US20090154298A1 (en) * 2005-10-25 2009-06-18 Fromanteel Limited Clock
US8218400B2 (en) 2005-10-25 2012-07-10 Fromanteel Limited Clock

Also Published As

Publication number Publication date
DE2132632B2 (de) 1972-08-17
JPS5249339B1 (enrdf_load_stackoverflow) 1977-12-16
CH1056670A4 (enrdf_load_stackoverflow) 1972-08-31
DE2132632A1 (de) 1972-01-20
CH531736A (fr) 1972-08-31

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