GB2027232A - Timepiece with tourbillon - Google Patents

Timepiece with tourbillon Download PDF

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Publication number
GB2027232A
GB2027232A GB7832180A GB7832180A GB2027232A GB 2027232 A GB2027232 A GB 2027232A GB 7832180 A GB7832180 A GB 7832180A GB 7832180 A GB7832180 A GB 7832180A GB 2027232 A GB2027232 A GB 2027232A
Authority
GB
United Kingdom
Prior art keywords
balance
oscillator
wheel
escapement
shaft
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.)
Granted
Application number
GB7832180A
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GB2027232B (en
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.)
Randall A G
Original Assignee
Randall 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 Randall A G filed Critical Randall A G
Priority to GB7832180A priority Critical patent/GB2027232B/en
Publication of GB2027232A publication Critical patent/GB2027232A/en
Application granted granted Critical
Publication of GB2027232B publication Critical patent/GB2027232B/en
Expired 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
    • G04B17/285—Tourbillons or carrousels

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

The balance and spring b, and the escapement e, of a portable mechanical timekeeper are mounted in a frame 1 which is caused to rotate simultaneously about two axes A1, A2 at right angles to each other. As shown the frame is attached to a sheel 10 by means of a shaft which can turn in a tube 2. The tube is fixed to a transverse shaft 3 which is rotated about the axis A2 by means of a wheel 8 fixed to the shaft 3 and meshing with train wheel 5. The wheel 10 meshes with a fixed contrate wheel 9 to turn the frame about the axis A1. A pinion V meshes with a wheel W fixed to the tube 2 and drives the escapement. <IMAGE>

Description

SPECIFICATION Tumble tourbillon This invention is to be applied to a portable mechanical timekeeper such as a watch or clock, controlled by a balance and spring oscillator. Its purpose is to eliminate the effects of gravity acting on the oscillator as happens in a conventional design in which both the escapement and oscillator are fixed within the frame of the movement.
It is not possible to make a balance and spring oscillator in which the centre of gravity of the whole system remains at all times and in all conditions of use coincident with the axis of rotation. As a result the period of oscillation will vary depending on the extent to which the centre of gravity of the oscillator is removed from the centre of rotation, and on the position of the oscillator in relation to the external gravitational field to which it is exposed.
To date the only way of reducing this gravitational error has been by the expenditure of a great deal of time, effort and care in the construction of the balance and spring system. Alternatively, the balance and spring system and its associated escapement have been mounted on a separate plate within the movement, and caused to rotate about the major axis of this plate. The latter method is successful if the plane of the plate remains vertical, but variations occur if the plane of the plate is other than vertical.
In this invention the oscillator is mounted within a framework, and this framework is caused to rotate about two axes at right angles, at the same time. Variations due both to gravity and to friction caused by gravity are thus caused to constantly average out, so that the resultant is zero.
The invention is shown in elevation in the diagram. A light framework, 1, contains an escapement, e, and a balance and spring system, b, suitably mounted, and rotates about its own central axis, A1. Bearings for 1 are provided in the tube 2 carried on the shaft 3. Shaft 3 is provided with suitable bearings in the main plates, 4. The drive for the whole mechanism is provided by the toothed pinion 5 carried on the shaft 6, itself driven by the pinion 7 in the usual way by a suitable mainspring and reduction gears carrying the hands.
The pinion 5 meshes with and drives the toothed wheel 8, mounted on shaft 3, and causes 3 to rotate about its own axis, A2, A fixed contrate wheel, 9, is in mesh with the toothed wheel 10. Due to the rotation of the shaft, 3, the wheel 10 moves around the wheel 9. This causes lOto turn, and with it the framework 1. A toothed wheel W fixed to 2 meshes with a pinion Vpivoted in 1, and this imparts motion to drive the escapement and thus maintain the oscillations of the balance.
By suitable choice of numbers of teeth of the gear wheels and pinions, 1 and 3 can be made to rotate at any desired speed. 1 and 3 need not rotate at the same speed.
Any suitable escapement and balance and spring system can be used.
1. Elimination of errors of rate of a mechanical clock, watch or other portable timekeeper controlled by a balance and spring, caused by the earth's or other gravitational and magnetic fields, when the timekeeper is placed in different positions in relation to those fields.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (1)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECIFICATION Tumble tourbillon This invention is to be applied to a portable mechanical timekeeper such as a watch or clock, controlled by a balance and spring oscillator. Its purpose is to eliminate the effects of gravity acting on the oscillator as happens in a conventional design in which both the escapement and oscillator are fixed within the frame of the movement.
    It is not possible to make a balance and spring oscillator in which the centre of gravity of the whole system remains at all times and in all conditions of use coincident with the axis of rotation. As a result the period of oscillation will vary depending on the extent to which the centre of gravity of the oscillator is removed from the centre of rotation, and on the position of the oscillator in relation to the external gravitational field to which it is exposed.
    To date the only way of reducing this gravitational error has been by the expenditure of a great deal of time, effort and care in the construction of the balance and spring system. Alternatively, the balance and spring system and its associated escapement have been mounted on a separate plate within the movement, and caused to rotate about the major axis of this plate. The latter method is successful if the plane of the plate remains vertical, but variations occur if the plane of the plate is other than vertical.
    In this invention the oscillator is mounted within a framework, and this framework is caused to rotate about two axes at right angles, at the same time. Variations due both to gravity and to friction caused by gravity are thus caused to constantly average out, so that the resultant is zero.
    The invention is shown in elevation in the diagram. A light framework, 1, contains an escapement, e, and a balance and spring system, b, suitably mounted, and rotates about its own central axis, A1. Bearings for 1 are provided in the tube 2 carried on the shaft 3. Shaft 3 is provided with suitable bearings in the main plates, 4. The drive for the whole mechanism is provided by the toothed pinion
    5 carried on the shaft 6, itself driven by the pinion 7 in the usual way by a suitable mainspring and reduction gears carrying the hands.
    The pinion 5 meshes with and drives the toothed wheel 8, mounted on shaft 3, and causes 3 to rotate about its own axis, A2, A fixed contrate wheel, 9, is in mesh with the toothed wheel 10. Due to the rotation of the shaft, 3, the wheel 10 moves around the wheel 9. This causes lOto turn, and with it the framework 1. A toothed wheel W fixed to 2 meshes with a pinion Vpivoted in 1, and this imparts motion to drive the escapement and thus maintain the oscillations of the balance.
    By suitable choice of numbers of teeth of the gear wheels and pinions, 1 and 3 can be made to rotate at any desired speed. 1 and 3 need not rotate at the same speed.
    Any suitable escapement and balance and spring system can be used.
    1. Elimination of errors of rate of a mechanical clock, watch or other portable timekeeper controlled by a balance and spring, caused by the earth's or other gravitational and magnetic fields, when the timekeeper is placed in different positions in relation to those fields.
GB7832180A 1978-08-03 1978-08-03 Timepiece with tourbillon Expired GB2027232B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7832180A GB2027232B (en) 1978-08-03 1978-08-03 Timepiece with tourbillon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7832180A GB2027232B (en) 1978-08-03 1978-08-03 Timepiece with tourbillon

Publications (2)

Publication Number Publication Date
GB2027232A true GB2027232A (en) 1980-02-13
GB2027232B GB2027232B (en) 1982-07-28

Family

ID=10498847

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7832180A Expired GB2027232B (en) 1978-08-03 1978-08-03 Timepiece with tourbillon

Country Status (1)

Country Link
GB (1) GB2027232B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1465024A1 (en) * 2003-04-03 2004-10-06 Franck Müller Watchland SA Bi-axial tourbillon for timepieces, especially for wristwatches
US7316504B1 (en) * 1999-09-02 2008-01-08 Watch-U-License Ag Mechanically regulated timepiece
US7350966B2 (en) 2005-03-30 2008-04-01 Montres Breguet Sa Watch including at least two regulating systems
US7445375B2 (en) 2005-01-28 2008-11-04 Richemont International Sa Watch with a tourbillon
US7527423B2 (en) 2004-04-15 2009-05-05 Montres Breguet Sa Watch comprising two tourbillons

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7316504B1 (en) * 1999-09-02 2008-01-08 Watch-U-License Ag Mechanically regulated timepiece
EP1465024A1 (en) * 2003-04-03 2004-10-06 Franck Müller Watchland SA Bi-axial tourbillon for timepieces, especially for wristwatches
SG137670A1 (en) * 2003-04-03 2007-12-28 Franck Muller Watchland S A Biaxial tourbillon for timepieces, particularly wristwatches
US7527423B2 (en) 2004-04-15 2009-05-05 Montres Breguet Sa Watch comprising two tourbillons
US7445375B2 (en) 2005-01-28 2008-11-04 Richemont International Sa Watch with a tourbillon
US7350966B2 (en) 2005-03-30 2008-04-01 Montres Breguet Sa Watch including at least two regulating systems

Also Published As

Publication number Publication date
GB2027232B (en) 1982-07-28

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