US3408810A - Jump seconds hand - Google Patents

Jump seconds hand Download PDF

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Publication number
US3408810A
US3408810A US580120A US58012066A US3408810A US 3408810 A US3408810 A US 3408810A US 580120 A US580120 A US 580120A US 58012066 A US58012066 A US 58012066A US 3408810 A US3408810 A US 3408810A
Authority
US
United States
Prior art keywords
wheel
seconds
worm gear
staff
gear
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
US580120A
Other languages
English (en)
Inventor
Meitinger Heinz
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.)
United States Time Corp
Original Assignee
United States Time Corp
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 United States Time Corp filed Critical United States Time Corp
Application granted granted Critical
Publication of US3408810A publication Critical patent/US3408810A/en
Assigned to CHASE MANHATTAN BANK, N.A., THE reassignment CHASE MANHATTAN BANK, N.A., THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FREDERIKSPLEIN HOLDING 1970 B.V., TIMEX CLOCK COMPANY, A DE CORP., TIMEX COMPUTERS LTD., A DE CORP., TIMEX CORPORATION, A DE CORP., TIMEX ENTERPRISES, INC., A BERMUDA CORP., TIMEX GROUP LTD., A BERMUDA CORP., TIMEX MEDICAL PRODUCTS LTD., A BERMUDA CORP., TIMEX N.V.
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
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • 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
    • G04B13/00—Gearwork
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement
    • 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

Definitions

  • the present invention relates to horology and more particularly to a mechanism to actuate the seconds hand of a watch so that it moves in rapid starts and stops, i.e., in a jump-like fashion.
  • the requirements on the mechanism is that it change the steady rotational movement of the index wheel, which is the wheel receiving the watchs driving power, and convert it into a jerky motion of a short uniform length.
  • a mechanism which includes a balance wheel or other regulator, such as a vibratory member, which is driven by well-known methods, for exmaple, by an electrical battery or a mainspring.
  • the balance wheel oscillates a forked lever having elongated driving pins.
  • the pins act on the teeth of an index wheel (escape wheel) to rotate the wheel.
  • the index wheel is fixed to a shaft which is movable axially and is rotatable. This shaft is depressed against a spring by a camming arm which acts against the spokes of the index wheel.
  • An indexing gear having a camming surface (a slant plane), preferably in the form of an elongated worm gear, is mounted on the same shaft as the index wheel.
  • the teeth of the worm gear is in mesh with the seconds wheel.
  • the index wheel is suddenly released and its shaft is pushed quickly upward by the spring. This motion causes the worm gear to quickly turn the seconds wheel, in a jerky fashion, the amount required for the seconds hand to move one second.
  • the worm gear does not rotate the seconds wheel during its axial depression.
  • the motive power to shift the seconds wheel is not produced, as in all other known shifting arrangements, by a direct drive, but exclusively by the intermediate drive mechanism of the present invention.
  • This has the advantage of providing a constant torque transmission from the balance wheel to the index wheel.
  • the one-second step of the seconds wheel, when it is caused by the worm gear, does not reflect amplitude variations of the balance wheel.
  • FIG. 1 is a diagrammatic perspective view of the parts forming the indexing arrangement of a wrist watch movement according to the present invention
  • FIG. 2 is a cross-section taken through the parts shown in FIG. 1, in which the indexing member, a worm gear, is in its initial setting;
  • FIG. 3 is a cross-sectional representation in the same manner as FIG. 2, in which the indexing member is in its indexing position;
  • FIG. 4 is a partial top view of the arrangement according to FIGS. 1 to 3.
  • the drawings show a part of the gear train of a wrist watch movement.
  • the movement parts are located between an upper frame plate 10 and a lower frame plate 12 on which the necessary bridges are arranged.
  • the seconds wheel 14 (fourth wheel) is carried on a staff 20 on which the seconds hand is fixed.
  • the axle 20 is pivotable and is carried by bridges 16 and 18, see FIG. 1.
  • This axle 20 carries the second hand 22, as it is shown by dash lines in FIG. 1.
  • the seconds Wheel 14 is driven by the indexing arrangement, designated as a unit by 24.
  • the drive to the seconds wheel 14 is in such a manner that the seconds hand 22 will be jerkly indexed every second for one indexing step. This type of movement is sometimes called a jump seconds movement.
  • the indexing arrangement includes an indexing member, preferably in the form of a Worm gear 26.
  • .Worm gear 26 engages with its teeth 28 in the tooth spaces of the teeth 30 of the seconds wheel 14.
  • the worm gear 26 is fixed on a carrying axle 32.
  • Axle 32 is journ-alled with its pivots 34 and 36 between the bridges 38 and 40 of the upper and lower frame plate.
  • the worm gear 26 is solidly fixed on its carrying axle 32.
  • the carrying axle 32 is axially slidable in the bearings of the bridge 38 and 40.
  • a spring blade 42 acts as a control device.
  • the spring blade 42 is fixed on the lower frame plate 12 and tries, by pushing on the bearing pivot 36 of the carrying axle 32, to raise the worm gear 26 into its final indexing position, shown in FIG. 3.
  • the drive of the carrying axle 32 occurs directly by a lever driving arrangement 44.
  • the indexing arrangement 44 includes a lever staff 46 which carries an oscillatory lever 48 having two arms 50 and 56-.
  • the lever arm 50 having a fork portion at its end, cooperates with banking pins 52 and 54 to restrict the amplitude of the lever.
  • the other lever arm 56 carries the index pins 62 and 64, which are elongated compared to normal index pins.
  • the pins 62 and 64 cooperate with the teeth 58 of the index wheel 60 (escape wheel).
  • the drive of the two-armed lever 48 occurs by means of an indexing pin 68 fixed on a roller 66.
  • the roller 66 is fixed, in a known manner, on a balance staff 70 which is oscillated by the balance wheel (not shown).
  • the drive of the index wheel can also occur in another .manner, e.g., by a supplementary wheel.
  • a resonator (vibrator) may be used to drive the roller 66 or to drive a wheel meshing with a wheel on the staff 70.
  • the balance wheel is oscillated by an electrical or mechanical drive system (not shown).
  • the jumping of the seconds wheel 14 occurs because the worm gear 26 is jerkily converted from its lower initial setting shown in FIG. 2 into its indexing position shown in FIG. 3.
  • This indexing motion is due to the release of the spring blade 42, which acts on the carrying axle 32.
  • the upward motion of axle 32 causes the worm gear 26, having the flanks of its teeth engaged with 'te'eth'of the seconds wheel 14,"to"hit on the wear control arrangement 72 which times the release of spring 42.
  • the index wheel 60 is provided with a hub 74 fixed on the carrying axle 32. This hub 72 is connected with the wheel rim 76 by spokes 78. i
  • a curved part 80 causes the axial shifting of the carrying axle 32.
  • This curved part 80 is a lancing from the section 82 of the upper frame plate 10.
  • the lower surface of the curved part 80 forms an end curved face 83 (see FIGS. 2 and 3).
  • This curved face 86 penetrates the arched slots 84 located between the spokes 78, when the index wheel is in its indexing (jump) position.
  • the spokes 78 are held and cammed against face 86 by the action of the spring blade 82 during the time the index wheel is being rotated step by step by the lever 48.
  • the spokes 78 have their edges located in the sense of rotation and they act as a trip edge 87, together with the curved face 86 of the curved part 80.
  • the mode of operation of the control arrangement 72 is as follows: In order to obtain the one-second steps of the seconds wheel 14, the worm gear 26 must perform one indexing step every second from its initial setting to its indexing position. This requirement provides the dimensions of the spokes 78.
  • the index Wheel must make one revolution in an integer number of seconds, for example, 1, 2, 3 or 4.
  • the length of the slots 84 formed by the spokes 78 has to correspond with this integer number of seconds.
  • the driving arrangement is laid out in such a manner that the index wheel 60 performs a complete revolution in four seconds. Therefore the spokes 78 have an angular distance from each other so that, during the four seconds needed for a complete revolution of the index wheel, the Worm gear shifts four times. Therefore, the spokes 78 are ar ranged into two pairs, each spoke being displaced 90 relative to each other.
  • the worm gear 26 is located in its highest position, in its initial setting with the spring 42 under tension.
  • the worm gear 26 is forced downward into this position by the action of the curved part 80 on the spokes 78.
  • the part 80 penetrates through the arched slots 84 and, with its curved face 86, cooperates with one of the spokes 78.
  • the axial sliding of the carrying axle 82 and its worm gear 26 occurs automatically downwards to the position shown in FIGS. 1 and 2 as the index wheel is rotated.
  • the shifting axial path is preferably from one to one-and -a-half times as long as the sixtieth part of the circumference of the seconds wheel.
  • the length of axial motion is determined by the curvature of the surface 86 of the curved part 80.
  • the sloping face of the indexing member cooperates with the wheel carrying a hand.
  • the slope of the teeth of the worm gear must have such a dimension so that at the setback of the worm gear into its initial setting (during which it rotates and its teeth are engaged with the seconds wheel) the worm gear does not move the teeth of the index wheel beyond the regular backlash.
  • Modifications may be made in the present invention "ineafis'to move the staff carrying the worm gear may be on the worm gear in the form of raised portions, instead of on the index wheel.
  • the raised portions would cam against a fixed arm.
  • a drive train to said seconds hand including an index wheel driven by said motive-means; an elongated gear connected to said index wheel and fixedly mounted on a .staff, said gear having teeth which slant relative to its axis and having axial positions of an initial setting and an indexing motion, means to journal said staff on the plate so that it is rotatable and movable axially, a seconds wheel adapted to be driven by said elongated gear and connected to said seconds hand, means to journal said seconds wheel on said frame plate, means to move said elongated gear staff axially from an initial setting into rapid indexing motion of said elongated gear, and means to control said axial motion so that it is operative once every second.
  • the elongated gear is formed as a worm gear.
  • control means includes a fixed camming arm attached to the frame plate.
  • a horological instrument in accordance with claim 1 in which a stationary curved part fixed to the frame cooperates for the axial shifting of the carrying staff with camming members provided on the index wheel.
  • a horological instrument in accordance with claim 8 in which the camming members are arranged in pairs on a circular path on the index wheel.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Transmission Devices (AREA)
US580120A 1965-09-29 1966-09-16 Jump seconds hand Expired - Lifetime US3408810A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEU0012070 1965-09-29

Publications (1)

Publication Number Publication Date
US3408810A true US3408810A (en) 1968-11-05

Family

ID=7567844

Family Applications (1)

Application Number Title Priority Date Filing Date
US580120A Expired - Lifetime US3408810A (en) 1965-09-29 1966-09-16 Jump seconds hand

Country Status (4)

Country Link
US (1) US3408810A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (2) CH1232566A4 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1523854B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1099897A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3695033A (en) * 1970-06-09 1972-10-03 Suwa Seikosha Kk Controlling device for an escape wheel
US3712048A (en) * 1970-01-12 1973-01-23 Ebauches Bettlach Sa Timepiece movement comprising a jumping type indicator
US3934404A (en) * 1973-11-17 1976-01-27 Kabushiki Kaisha Daini Seikosha Second hand regulating mechanism
US3991556A (en) * 1974-06-12 1976-11-16 Societe Jaz S.A. Clock or watch movement
US4177630A (en) * 1977-10-25 1979-12-11 Bunker Ramo Corporation Sweep seconds to jump seconds conversion for clocks
US4459032A (en) * 1980-01-29 1984-07-10 Societe Suisse Pour I'industrie Horlogere Management Services S.A. Thin wrist-watch
US20050007888A1 (en) * 2002-02-01 2005-01-13 Tag-Heuer Sa Device comprising a clock movement and a chronograph module
FR2867285A1 (fr) * 2004-03-03 2005-09-09 Benoit Espiau Montre

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR664225A (fr) * 1927-09-30 1929-08-30 Barbezat Bole H Pièce d'horlogerie avec aiguille de seconde au centre
US2580597A (en) * 1948-06-09 1952-01-01 Ebauches Sa Timepiece movement with intermittent seconds indicator
US2766578A (en) * 1953-10-08 1956-10-16 Ebauches Sa Timepiece movement with a jumping second-beating hand
US2921476A (en) * 1957-06-29 1960-01-19 Derby S A Timepiece movement with a jumping second-beating hand
US3058293A (en) * 1958-03-28 1962-10-16 Durowe A G Second hand drive for timepieces
US3340687A (en) * 1965-08-13 1967-09-12 Novikov Mikhail Fedorovich Device for intermittent motion of second hand

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR664225A (fr) * 1927-09-30 1929-08-30 Barbezat Bole H Pièce d'horlogerie avec aiguille de seconde au centre
US2580597A (en) * 1948-06-09 1952-01-01 Ebauches Sa Timepiece movement with intermittent seconds indicator
US2766578A (en) * 1953-10-08 1956-10-16 Ebauches Sa Timepiece movement with a jumping second-beating hand
US2921476A (en) * 1957-06-29 1960-01-19 Derby S A Timepiece movement with a jumping second-beating hand
US3058293A (en) * 1958-03-28 1962-10-16 Durowe A G Second hand drive for timepieces
US3340687A (en) * 1965-08-13 1967-09-12 Novikov Mikhail Fedorovich Device for intermittent motion of second hand

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712048A (en) * 1970-01-12 1973-01-23 Ebauches Bettlach Sa Timepiece movement comprising a jumping type indicator
US3695033A (en) * 1970-06-09 1972-10-03 Suwa Seikosha Kk Controlling device for an escape wheel
US3934404A (en) * 1973-11-17 1976-01-27 Kabushiki Kaisha Daini Seikosha Second hand regulating mechanism
US3991556A (en) * 1974-06-12 1976-11-16 Societe Jaz S.A. Clock or watch movement
US4177630A (en) * 1977-10-25 1979-12-11 Bunker Ramo Corporation Sweep seconds to jump seconds conversion for clocks
US4459032A (en) * 1980-01-29 1984-07-10 Societe Suisse Pour I'industrie Horlogere Management Services S.A. Thin wrist-watch
US20050007888A1 (en) * 2002-02-01 2005-01-13 Tag-Heuer Sa Device comprising a clock movement and a chronograph module
US7905655B2 (en) * 2002-02-01 2011-03-15 Lvmh Swiss Manufactures Sa Device comprising a clock movement and a chronograph module
US20110164474A1 (en) * 2002-02-01 2011-07-07 Lvmh Swiss Manufactures Sa Device comprising a clock movement and a chronograph module
US8113707B2 (en) 2002-02-01 2012-02-14 Lvmh Swiss Manufactures Sa Device comprising a clock movement and a chronograph module
US8182138B2 (en) 2002-02-01 2012-05-22 Lvmh Swiss Manufactures Sa Device comprising a clock movement and a chronograph module
US8308345B2 (en) 2002-02-01 2012-11-13 Lvmh Swiss Manufactures Sa Device comprising a clock movement and a chronograph module
FR2867285A1 (fr) * 2004-03-03 2005-09-09 Benoit Espiau Montre

Also Published As

Publication number Publication date
CH1232566A4 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-06-13
DE1523854B2 (de) 1970-01-15
CH479107A (de) 1969-09-30
DE1523854A1 (de) 1969-06-12
GB1099897A (en) 1968-01-17

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CHASE MANHATTAN BANK, N.A., THE

Free format text: SECURITY INTEREST;ASSIGNORS:TIMEX CORPORATION, A DE CORP.;TIMEX COMPUTERS LTD., A DE CORP.;TIMEX CLOCK COMPANY, A DE CORP.;AND OTHERS;REEL/FRAME:004181/0596

Effective date: 19830331