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US3261158A - Vibrator driven timepiece - Google Patents

Vibrator driven timepiece Download PDF

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Publication number
US3261158A
US3261158A US459177A US45917765A US3261158A US 3261158 A US3261158 A US 3261158A US 459177 A US459177 A US 459177A US 45917765 A US45917765 A US 45917765A US 3261158 A US3261158 A US 3261158A
Authority
US
United States
Prior art keywords
wheel
lever
cam
ratchet wheel
arm
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
US459177A
Other languages
English (en)
Inventor
Hetzel Max
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.)
Centre Electronique Horloger SA
Original Assignee
Centre Electronique Horloger SA
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 Centre Electronique Horloger SA filed Critical Centre Electronique Horloger SA
Application granted granted Critical
Publication of US3261158A publication Critical patent/US3261158A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G04C3/08—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
    • G04C3/101—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details
    • 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

Definitions

  • FIG.6 Fl6.7 F
  • Certain timepieces such as electronic watches, comprise a mechanical oscillator, which may be in the form of a diapason or tuning fork, or of a vibrating blade, or even of a torsion lever, and which exercises the functions simultaneously of a regulating member and of a driving means.
  • oscillators which may vibrate at frequencies of some tens to some thousands of oscillations per second, usually exercise their driving function through the medium of a pawl co-operating with a rachet wheel, the first wheel of a minute-wheel train.
  • the pawl and the ratchet wheel constitute, on the one hand, a motion-transformer, since they change an alternating movement into a continuous rotary motion, and, on the other hand, a frequency-divider, for a large number of vibrations of the oscillator occasion only a small number of revolutions of the wheel, or even only a fraction of a revolution.
  • the present invention which is free from the abovementioned disadvantages, relates to a timepiece in which the regulating and motor member is constituted by a mechanical oscillator, which actuates, through a catch on a wheel, a first ratchet wheel.
  • a cam fixed upon this ratchet wheel, by a three-armed lever, preferably balanced, upon one arm of which there acts a restoring spring, while to its second arm is fixed a resilient blade, and on its third arm is mounted a second pawl, by a minute-wheel wheelwork, of which the first wheel is a catch wheel, all for the purpose that the mechanical oscillator that drives the first ratchet wheel, the cam, rigid with the latter, may displace the lever against the action of its restoring spring and then abandon it, the lever returning suddenly to its initial position, carrying the minutes wheel along by the second of the abovementioned pawls.
  • FIGURE 1 is a view in plan
  • FIGURES 2 to 9 show modifications of detail.
  • an oscillator partially represented at 1, having an alternating motion in the direction of the arrows 2, supports a pawl formed of a blade 3 and a jewelled pallet 4.
  • the latter drives a ratchet wheel 5, having a large number of teeth in the form of an isosceles triangle.
  • a cam 6 On its shaft is fixed a cam 6, having five teeth.
  • a second pawl fixed to the watch frame, comprising a blade 7 and a jewelled pallet 8, plays the part of a retaining member, immobilising the wheel when it is not being driven by the oscillator.
  • a lever 9, pivoted by its shaft 10 in the watch frame presents three arms 9a, 9b and 90. Two fixed abutments 11 and 12 limit its angular displacements.
  • a resilient blade 13 is an extension of the arm 9a, and comes into contact with the teeth of the cam 6.
  • a helical spring 14 is fixed by one of its ends to the arm 9b, and by the other to the frame.
  • the arm 9c carries, at its end, a pawl comprising a blade 15 and a jewelled pallet 16, which co-operates with a ratchet wheel 17, the first wheel of the minutewheel wheel'work, which is continued by the wheels 18 and 19.
  • a pawl formed by a blade 20 and a jewelled pallet 21 prevents any rotation of the minute-wheel wheelwork in the opposite direction.
  • a stop lever 22 displaceable in the direction of the arrows 23, and capable of being actuated from the exterior of the watch, by means of a member not illustrated, enables the lever 9 to be immobilised by pressing its arm 9a against the abutment 11.
  • This device operates in the following manner: When the oscillator 1 vibrates, the pawl 3, 4 drives the ratchet wheel 5, and the cam 6 which is solid with it, in a jerky rotational movement. At each fifth of a revolution of the cam, one tooth of the latter meets the resilient blade 13 and drives it, slightly bending it.
  • the lever 9 is then displaced in its position of stoppage, for instance against the abutment 11, Whilst the helical spring 14 has been cocked, and the pawl 15, 16 has recoiled by at least one tooth upon the ratchet wheel 17. At the moment when the cam releases the extremity of the spring blade 13, the spring 14 suddenly returns the lever 9 to its position of bearing against the abutment 12, and the pawl 15, 16 drives the ratchet wheel 17 at least one tooth.
  • the spring blade 13 presents a slight bending moment, and the lever 9 possesses a great moment of inertia, so that during the periods of driving of the lever by the cam 6, the spring is displaced with a jerky movement, while the lever has a continuous movement. Under these conditions, only the moments of inertia of the spring blade, the ratchet wheel 5 and the cam 6 disturb the vibrations of the oscillator.
  • the cam may have four teeth, .as represented by FIGURE 2, three teeth as shown in FIGURE 3, or even two teeth as shown by FIGURE 4. In fact the greatest division of frequency is realized with the comma-shaped cam of FIGURE 5.
  • the cams may have the forms shown by FIG- URES 6, 7, 8 and 9, no longer working with the extremity of the spring blade but with one of its sides. In this way the driving function is independent of the length of the spring. Nevertheless the friction is permanent between the cam and the spring blade.
  • the ratchet wheel 17 may consitute the seconds wheel.
  • a frequency of 480 vibrations per second for the oscillator and 240 teeth for the wheel 5 and by placing on this wheel a cam with one tooth, the
  • lever 9 executes two oscillations per second. If the wheel 17 is provided with 120 teeth, it may be fixed to 3. seconds hand, which will advance at every half-second.
  • the stop lever 22 provides the possibility of immobilising the lever 9 against the abutment 1 2 without the vibrations of the oscillator being interrupted. In this way it is easily possible to execute any setting operation, or even to stop or re-start the timepiece for the purpose of measuring an interval of time.
  • a timepiece the regulating and driving member of which is constituted by a mechanical oscillator (1), actuating, through a catch device, a first ratchet wheel (5), characterised by a cam (6), fixed upon this ratchet wheel; by a three-armed lever (9), upon one arm of which there acts a restoring spring (14), while upon its second arm is fixed a resilient blade (13), and upon the third arm is mounted a second pawl (15); and by a minutes wheelwork, of which the first wheel (17) is a second ratchet wheel, upon which there acts this second pawl; all in order that the mechanical oscillator driving the first ratchet wheel, the cam rigid with the latter may displace the lever against the action of its restoring spring, and may then abandon the lever, returning briskly to its initial position, and carrying the minutes wheel along by the second abovementio-ned pawl.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electromechanical Clocks (AREA)
US459177A 1964-05-28 1965-05-27 Vibrator driven timepiece Expired - Lifetime US3261158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH699164A CH425640A (fr) 1964-05-28 1964-05-28 Pièce d'horlogerie dont l'organe régulateur et moteur est constitué par un oscillateur mécanique

Publications (1)

Publication Number Publication Date
US3261158A true US3261158A (en) 1966-07-19

Family

ID=4318216

Family Applications (1)

Application Number Title Priority Date Filing Date
US459177A Expired - Lifetime US3261158A (en) 1964-05-28 1965-05-27 Vibrator driven timepiece

Country Status (9)

Country Link
US (1) US3261158A (de)
AT (1) AT255988B (de)
BE (1) BE664501A (de)
CH (2) CH425640A (de)
DE (1) DE1254542B (de)
FR (1) FR1434752A (de)
GB (1) GB1047677A (de)
NL (1) NL6506744A (de)
SE (1) SE334332B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1245468A4 (de) * 1968-08-19 1971-03-15
DE60042391D1 (de) * 2000-01-06 2009-07-30 Chopard Manufacture Sa Schneller Korrekturmechanismus für Kalenderuhr

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH303336A (fr) * 1952-11-05 1954-11-30 D Ebauches De Chezard S A Fab Pièce d'horlogerie à seconde sautante.
IT563090A (de) * 1956-07-30

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
AT255988B (de) 1967-07-25
SE334332B (de) 1971-04-19
DE1254542B (de) 1967-11-16
CH699164A4 (de) 1966-08-15
CH425640A (fr) 1966-08-15
BE664501A (de) 1965-09-16
FR1434752A (fr) 1966-04-08
GB1047677A (en) 1966-11-09
NL6506744A (de) 1965-11-29

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