US3161012A - Driving balance-wheel for an electrical timepiece - Google Patents
Driving balance-wheel for an electrical timepiece Download PDFInfo
- Publication number
- US3161012A US3161012A US299287A US29928763A US3161012A US 3161012 A US3161012 A US 3161012A US 299287 A US299287 A US 299287A US 29928763 A US29928763 A US 29928763A US 3161012 A US3161012 A US 3161012A
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- United States
- Prior art keywords
- wheel
- balance
- plates
- shape
- segment
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- 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
- G04C3/06—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 using electromagnetic coupling between electric power source and balance
Definitions
- the present invention pertains to a driving balancewheel for an electrical timepiece.
- the driving balance-Wheels for electrical time-pieces which comprise a magnetic circuit often provided with two permanent magnets and with elements made of magnetic material, are difficult to be manufactured, due the hardness of the magnetic material, which can be ditlicnlt to work, and due to the relatively high weight of the magnets.
- An object of the present invention is to provide such a balance-wheel which is constituted and arranged in such a Way that its construction is simple and easy.
- a balance-wheel according to the invention is characterized by the fact that it comprises two parallel circular plates, made of a non-magnetic material.
- Each of the plates carries two permanent magnets connected by an armature made of magnetic material, having the shape of a segment of crown, located in an opening of corresponding shape provided in each of the plates.
- Each magnet of one plate is located in the neighborhood of one of the extremities of one of the armatures, opposite one of the magnets of the other plate. Accordingly the ".edian plane of the magnetic field so created has the shape of a loop directed par allelly to the axis of the balance-wheel and perpendicularly to the diametral plane of symmetry of the latter.
- FIG. 1 is a plan View of a part of a balance-wheel of a timepiece
- FIG. 2 is an axial section, along line 11-11 of FIG. 1.
- the balance-Wheel represented in FIGS. 1 and 2 comprises a shaft 1 on which is mounted a sleeve 2 constituting a brace between two parallel circular plates 3 and 4, made of non-magnetic material.
- a recess 5 having the shape of an arc of a circle, located in the neighbourhood of their periphery.
- the two small plates 6 of the circular plates 3 and 4 are located opposite one another.
- Each circular plate 3 and 4 is provided with two holes provided in its part constituting the bottom of the recess 5.
- a permanent magnet 7, is forced in each of these holes, its rear axial face being in contact with one of the small plates 6.
- Each magnet '7 of one of the circular plates 3 and 4 is situated opposite one of the magnets of the other plate.
- a magnetic circuit having the shape of a loop, the median plane of which, schematically represented by the line 8 in FIG. 1, is parallel to the axis 1 of the balance-wheel and is perpendicular to the diametral plane of symmetry 9 of the balance-wheel.
- Each of two plates 3 and i carry moreover a counterweight lti having the shape of a segment of crown, serving to balance the weight of the magnet '7 and ot the armature 6.
- These counterweights are forced into recesses 11 provided in the circular plates 3 and 4.
- the fine balancing of the balance-Wheel is obtained by boring radial holes 12 in the connterweights 1%.
- a driving balance-wheel for an electrical timepiece comprising two parallel circular plates of non-magnetic material, a shaft for supporting said plates for rotational motion, a recess having the shape of a segment of a circle in each of said plates adjacent the periphery thereof, an armature plate of magnetic material having the shape of a segment of a circle in each of said recesses, 11 pair of spaced permanent magnets fixed to each of said armatures, the magnets 01' one pair being disposed opposite the magnets of the other pair, said permanent magnets being polarized to establish a magnetic field in the form of a loop passing through said paths of permanent magnets and said armatures wherein the median plane of the magnetic field is parallel to the axis of said balance-wheel and perpendicular to the diametral plane of symmetry of said balance-wheel, and a counterweight in the shape of a segment of a circle fixed to each of said plates near the periphery thereof and diametrically opposite aid recesses.
- each of said plates includes a second recess and said counterweight is fixed in said second recess.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Description
A. HUG ETAL 3,161,012
DRIVING BALANCE-WHEEL FOR AN ELECTRICAL. TIMEPIECE Dec. 15, 1964 Filed Aug. 1, 1963 Ill Q 'III/IIIIIIIIII) 1 United States Patent 3,161,tll2 DRIVTNG BALANCE-WHEEL FOP. AN ELECTRTtiAL TEMEPIECE Andre Hog and Rene Meister, Nenchatel, Switzerland, as-
signors to Ehanclres S.A., Neuchatel, Switzerland, :1 iirrn of Switzerland Filed Aug. 1, 1963, Ser. No. 299,287 Claims priority, application Switzerland, Aug. 22, 1962, 9,990/62 2 Claims. (Cl. 58--28) The present invention pertains to a driving balancewheel for an electrical timepiece.
The driving balance-Wheels for electrical time-pieces, which comprise a magnetic circuit often provided with two permanent magnets and with elements made of magnetic material, are difficult to be manufactured, due the hardness of the magnetic material, which can be ditlicnlt to work, and due to the relatively high weight of the magnets.
An object of the present invention is to provide such a balance-wheel which is constituted and arranged in such a Way that its construction is simple and easy.
A balance-wheel according to the invention is characterized by the fact that it comprises two parallel circular plates, made of a non-magnetic material. Each of the plates carries two permanent magnets connected by an armature made of magnetic material, having the shape of a segment of crown, located in an opening of corresponding shape provided in each of the plates. Each magnet of one plate is located in the neighborhood of one of the extremities of one of the armatures, opposite one of the magnets of the other plate. Accordingly the ".edian plane of the magnetic field so created has the shape of a loop directed par allelly to the axis of the balance-wheel and perpendicularly to the diametral plane of symmetry of the latter.
Other objects, features and advantages of the invention will be apparent from the following detailed description when read with the drawings which show, by way of example, one embodiment of the invention. In the drawings:
FIG. 1 is a plan View of a part of a balance-wheel of a timepiece, and
FIG. 2 is an axial section, along line 11-11 of FIG. 1.
The balance-Wheel represented in FIGS. 1 and 2 comprises a shaft 1 on which is mounted a sleeve 2 constituting a brace between two parallel circular plates 3 and 4, made of non-magnetic material. In each of these two plates there is milled a recess 5, having the shape of an arc of a circle, located in the neighbourhood of their periphery. Fixed into recess 5 is a small plate 6, made of magnetic material, having the shape of a segment of crown. The two small plates 6 of the circular plates 3 and 4 are located opposite one another.
Each circular plate 3 and 4 is provided with two holes provided in its part constituting the bottom of the recess 5. A permanent magnet 7, is forced in each of these holes, its rear axial face being in contact with one of the small plates 6.
Each magnet '7 of one of the circular plates 3 and 4 is situated opposite one of the magnets of the other plate. There is thus formed a magnetic circuit having the shape of a loop, the median plane of which, schematically represented by the line 8 in FIG. 1, is parallel to the axis 1 of the balance-wheel and is perpendicular to the diametral plane of symmetry 9 of the balance-wheel.
Each of two plates 3 and i carry moreover a counterweight lti having the shape of a segment of crown, serving to balance the weight of the magnet '7 and ot the armature 6. These counterweights are forced into recesses 11 provided in the circular plates 3 and 4. The fine balancing of the balance-Wheel is obtained by boring radial holes 12 in the connterweights 1%.
What we claim is:
l. A driving balance-wheel for an electrical timepiece comprising two parallel circular plates of non-magnetic material, a shaft for supporting said plates for rotational motion, a recess having the shape of a segment of a circle in each of said plates adjacent the periphery thereof, an armature plate of magnetic material having the shape of a segment of a circle in each of said recesses, 11 pair of spaced permanent magnets fixed to each of said armatures, the magnets 01' one pair being disposed opposite the magnets of the other pair, said permanent magnets being polarized to establish a magnetic field in the form of a loop passing through said paths of permanent magnets and said armatures wherein the median plane of the magnetic field is parallel to the axis of said balance-wheel and perpendicular to the diametral plane of symmetry of said balance-wheel, and a counterweight in the shape of a segment of a circle fixed to each of said plates near the periphery thereof and diametrically opposite aid recesses.
2. The driving balance-wheel of claim 1, wherein each of said plates includes a second recess and said counterweight is fixed in said second recess.
References Cited by the Examiner UNITED STATES PATENTS 2,986,683 5/61 Lavet et al. 5828 3,056,253 10/62 Beyner et al. 58*28 FOREIGN PATENTS 209,269 5/60 Austria.
LEYLAND M. MARTIN, Primary Examiner.
JOSEPH P. STRIZAK, Examiner,
Claims (1)
1. A DRIVING BALANCE-WHEEL FOR AN ELECTRICAL TIMEPIECE COMPRISING TWO PARALLEL CIRCULAR PLATES OF NON-MAGNETIC MATERIAL, A SHAFT FOR SUPPORTING SAID PLATES FOR ROTATIONAL MOTION, A RECESS HAVING THE SHAPE OF A SEGMENT OF A CIRCLE IN EACH OF SAID PLATES ADJACENT THE PERIPHERY THEREOF, AN ARMATURE PLATE OF MAGNETIC MATERIAL HAVING THE SHAPE OF A SEGMENT OF A CIRCLE IN EACH OF SAID RECESSES, A PAIR OF SPACED PERMANENT MAGNETS FIXED TO EACH OF SAID ARMATURES, THE MAGNETS OF ONE PAIR BEING DISPOSED OPPOSITE THE MAGNETS OF THE OTHER PAIR, SAID PERMANENT MAGNETS BEING POLARIZED TO ESTABLISH A MAGNETIC FIELD IN THE FORM OF A LOOP PASSING THROUGH SAID PATHS OF PERMANENT MAGNETS AND SAID ARMATURES WHEREIN THE MEDIAN PLANE OF THE MAGNETIC FIELD IS PARALLEL TO THE AXIS OF SAID BALANCE-WHEEL AND PERPENDICULAR TO THE DIAMETRAL PLANE OF SYMMETRY OF SAID BALANCE-WHEEL, AND A COUNTERWEIGHT IN THE SHAPE OF A SEGMENT OF A CIRCLE FIXED TO EACH OF SAID PLATES NEAR THE PERIPHERY THEREOF AND DIAMETRICALLY OPPOSITE SAID RECESSES.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH999062A CH385751A (en) | 1962-08-22 | 1962-08-22 | Motor balance for electric timepiece |
Publications (1)
Publication Number | Publication Date |
---|---|
US3161012A true US3161012A (en) | 1964-12-15 |
Family
ID=4357912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US299287A Expired - Lifetime US3161012A (en) | 1962-08-22 | 1963-08-01 | Driving balance-wheel for an electrical timepiece |
Country Status (2)
Country | Link |
---|---|
US (1) | US3161012A (en) |
CH (2) | CH999062A4 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3528239A (en) * | 1967-10-04 | 1970-09-15 | Messrs Gebruder Junghans Gmbh | Balance construction |
US3670492A (en) * | 1969-05-28 | 1972-06-20 | Citizen Watch Co Ltd | Balance wheel assembly |
US3765166A (en) * | 1971-12-29 | 1973-10-16 | Suwa Seikosha Kk | Balance construction for electronic timepieces |
US3813872A (en) * | 1971-11-26 | 1974-06-04 | Seiko Instr & Electronics | Balance wheel assembly for an electric timepiece |
WO2006045824A2 (en) * | 2004-10-26 | 2006-05-04 | Tag Heuer Sa | Wristwatch regulating member and mechanical movement comprising one such regulating member |
US20100054089A1 (en) * | 2007-05-08 | 2010-03-04 | Maier Frederic | Timepiece component and method for making same |
US20110096636A1 (en) * | 2009-10-26 | 2011-04-28 | Gilles Pellet | Regulating organ comprising at least two balances |
US20110103197A1 (en) * | 2008-03-20 | 2011-05-05 | Nivarox-Far S.A. | One-piece regulating member and method of manufacturing the same |
WO2011051497A1 (en) | 2009-11-02 | 2011-05-05 | Lvmh Swiss Manufactures Sa | Regulating member for a wristwatch, and timepiece comprising such a regulating member |
US20110103196A1 (en) * | 2008-03-20 | 2011-05-05 | Nivarox-Far S.A. | Composite balance and method of manufacturing the same |
US20130188461A1 (en) * | 2010-07-19 | 2013-07-25 | Nivarox-Far S.A. | Balance with inertia adjustment using an insert |
US10948881B2 (en) * | 2017-08-04 | 2021-03-16 | The Swatch Group Research And Development Ltd | Timepiece movement fitted with an electromagnetic transducer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT209169B (en) * | 1957-03-21 | 1960-05-25 | Buntpapierfabrik A G | Process for leveling paper surfaces |
US2986683A (en) * | 1956-07-26 | 1961-05-30 | Hatot Leon Ets | Driving balance-wheels more particularly applicable to timing instruments |
US3056253A (en) * | 1960-06-10 | 1962-10-02 | Ebauches Sa | Electrically operated oscillatory system for timepieces |
-
1962
- 1962-08-22 CH CH999062D patent/CH999062A4/xx unknown
- 1962-08-22 CH CH999062A patent/CH385751A/en unknown
-
1963
- 1963-08-01 US US299287A patent/US3161012A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2986683A (en) * | 1956-07-26 | 1961-05-30 | Hatot Leon Ets | Driving balance-wheels more particularly applicable to timing instruments |
AT209169B (en) * | 1957-03-21 | 1960-05-25 | Buntpapierfabrik A G | Process for leveling paper surfaces |
US3056253A (en) * | 1960-06-10 | 1962-10-02 | Ebauches Sa | Electrically operated oscillatory system for timepieces |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3528239A (en) * | 1967-10-04 | 1970-09-15 | Messrs Gebruder Junghans Gmbh | Balance construction |
US3670492A (en) * | 1969-05-28 | 1972-06-20 | Citizen Watch Co Ltd | Balance wheel assembly |
US3813872A (en) * | 1971-11-26 | 1974-06-04 | Seiko Instr & Electronics | Balance wheel assembly for an electric timepiece |
US3765166A (en) * | 1971-12-29 | 1973-10-16 | Suwa Seikosha Kk | Balance construction for electronic timepieces |
EP2282240A3 (en) * | 2004-10-26 | 2011-02-23 | LVMH Swiss Manufactures SA | Regulating element for wristwatch and mechanical movement comprising such a regulating element |
WO2006045824A2 (en) * | 2004-10-26 | 2006-05-04 | Tag Heuer Sa | Wristwatch regulating member and mechanical movement comprising one such regulating member |
WO2006045824A3 (en) * | 2004-10-26 | 2006-08-17 | Tag Heuer Sa | Wristwatch regulating member and mechanical movement comprising one such regulating member |
US7396154B2 (en) | 2004-10-26 | 2008-07-08 | Tag Heuer Sa | Regulating element for wristwatch and mechanical movement comprising one such regulating element |
EP2282240A2 (en) | 2004-10-26 | 2011-02-09 | LVMH Swiss Manufactures SA | Regulating element for wristwatch and mechanical movement comprising such a regulating element |
US8636403B2 (en) * | 2007-05-08 | 2014-01-28 | Patek Philippe Sa Geneve | Timepiece component and method for making same |
US9342053B2 (en) | 2007-05-08 | 2016-05-17 | Patek Philippe Sa Geneve | Method for making a timepiece component |
US20100054089A1 (en) * | 2007-05-08 | 2010-03-04 | Maier Frederic | Timepiece component and method for making same |
US8550699B2 (en) * | 2008-03-20 | 2013-10-08 | Nivarox-Far S.A. | Composite balance and method of manufacturing the same |
US20110103197A1 (en) * | 2008-03-20 | 2011-05-05 | Nivarox-Far S.A. | One-piece regulating member and method of manufacturing the same |
US20110103196A1 (en) * | 2008-03-20 | 2011-05-05 | Nivarox-Far S.A. | Composite balance and method of manufacturing the same |
US8523426B2 (en) | 2008-03-20 | 2013-09-03 | Nivarox-Far S.A. | One-piece regulating member and method of manufacturing the same |
US8668378B2 (en) * | 2009-10-26 | 2014-03-11 | Societe Anonyme De La Manufacture D'horlogerie Audemars Piguet & Cie | Regulating organ comprising at least two balances |
US20110096636A1 (en) * | 2009-10-26 | 2011-04-28 | Gilles Pellet | Regulating organ comprising at least two balances |
US8534910B2 (en) | 2009-11-02 | 2013-09-17 | Lvmh Swiss Manufactures Sa | Regulating member for a wristwatch, and timepiece comprising such a regulating member |
WO2011051497A1 (en) | 2009-11-02 | 2011-05-05 | Lvmh Swiss Manufactures Sa | Regulating member for a wristwatch, and timepiece comprising such a regulating member |
US20130188461A1 (en) * | 2010-07-19 | 2013-07-25 | Nivarox-Far S.A. | Balance with inertia adjustment using an insert |
KR101457312B1 (en) | 2010-07-19 | 2014-11-04 | 니바록스-파 에스.에이. | Balance having inertia adjustment using an insert |
US8944675B2 (en) * | 2010-07-19 | 2015-02-03 | Nivarox-Far S.A. | Balance with inertia adjustment using an insert |
US10948881B2 (en) * | 2017-08-04 | 2021-03-16 | The Swatch Group Research And Development Ltd | Timepiece movement fitted with an electromagnetic transducer |
Also Published As
Publication number | Publication date |
---|---|
CH385751A (en) | 1964-08-31 |
CH999062A4 (en) | 1964-08-31 |
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