US3916614A - Timepiece provided with a guide bush - Google Patents

Timepiece provided with a guide bush Download PDF

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Publication number
US3916614A
US3916614A US531386A US53138674A US3916614A US 3916614 A US3916614 A US 3916614A US 531386 A US531386 A US 531386A US 53138674 A US53138674 A US 53138674A US 3916614 A US3916614 A US 3916614A
Authority
US
United States
Prior art keywords
guide bush
arbor
hour wheel
plate
wheel
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
US531386A
Other languages
English (en)
Inventor
Tatsuo Takatsuki
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Application granted granted Critical
Publication of US3916614A publication Critical patent/US3916614A/en
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
    • G04B33/00—Calibers
    • G04B33/10—Calibers with seconds hand arranged in the centre of the dial
    • 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

Definitions

  • a timepiece provided with a guide bush comprises, in combination, a second arbor provided with a fourth [30] Foreign Apphcatmn Pmmty Data wheel, a cannon pinion, and an hour wheel rotatably Dec. 10, 1973 Japan 48-140711 mounted in the guide bush
  • the guide bush i fixedly mounted to an hour wheel guard plate so that the ar- [52] US. Cl.2 58/59; 58/138; 58/139 bor, pinion and wheels are rotatably mounted in the [51] Ila. Cl.
  • FIG. 1 The conventional type of a timepiece provided with a guide bush is shown in FIG. 1 and comprises an arbor 3A, on which a fourth wheel 3 for driving a second hand is mounted, supported by a bearing 2 which is provided in a bridge plate I and by a center pipe 5 which penetrates a movement plate.
  • a cannon pinion 7 is disposed and mounted at the outer surface of said center pipe 5, a center wheel 6 for driving a minute hand is rotatably mounted around the center pipe 5, and an hour wheel 8 for driving an hour hand is also disposed therearound.
  • an hour wheel guard plate 9 is disposed around the center pipe 5, and a guide bush 10 is fixedly mounted to the wheel guard plate 9.
  • a day-disk 11 is rotatably mounted around the guide bush 10 by means of a snap for supporting a day-disk l2, and a dial plate 13 is concentrically disposed around the lower periphery of the guide bush l0.
  • the center pipe 5 bears the fourth wheel 3, the cannon pinion 7 and the hour Wheels.
  • said guide bush l0 bears the dial plate 13.
  • a timepiece provided with a guide bush.
  • a second arbor provided with the fourth wheel, a cannon pinion and an hour wheel are respectively and rotatably mounted into the guide bush.
  • the guide bush is fixedly mounted to the hour wheel guard plate so that the arbor and wheels are rotatably mounted into the guide bush and to the dial plate via said guide bush without the center pipe,
  • FIG. 1 is an expanded sectional view showing a prior art construction
  • FIG. 2 is an expanded sectional view showing a main part of an embodiment according to the present inven- 'tion.
  • FIG. 2 shows the principal part of a timepiece providing a guide bush of this invention, and there is a new guide bush 14 which permits the elimination of the center pipe 5 shown in FIG. 1.
  • a second arbor 3A is rotatably positioned on a bridge plate 1, and a cannon pinion 7 and a minute wheel 6 are rotatably mounted on said second arbor 3A.
  • An hour wheel 8 is rotatably positioned on the outer surface of said cannon pinion 7 and rotatably mounted into the inner portion of the guide bush 14, said guide bush 14 being fixedly mounted to an hour wheel guard plate 9 and to a dial plate 13.
  • said second arbor 3A, said cannon pinion 7 and said hour wheel 8 are respectively and rotatably mounted into said guide bush 14in a coaxial alignment.
  • the second arbor 3A, cannon pinion 7 and hour wheel 8 are respectively and rotatably mounted to the dial plate 13 via said guide bush l4.
  • Said guide bush 14 functions as a bearing for said second arbor 3A, cannon pinion 7 and hour wheel 8, and at the same time supports and mounts said second arbor 3A, cannon pinion 7 and hour wheel 8 to said dial plate 13.
  • the second arbor 3A, cannon pinion 7 and hour wheel 8 are respectively and rotatably mounted to said dial plate 13 via guide bush 14 without need of the center pipe member 5 as used in a conventional type.
  • Said second arbor 3A is strongly mounted to a base plate 4 by a bearing 4A provided therein.
  • the base plate 4 (or a bridge plate 1) is made thin in thickness as compared to a conventional plate (or bridge), thereby reducing the thickness of the watch.
  • said bearing 4A is provided in the plate 4.
  • the guide bush according to the present invention serves as the center pipe in the conventional type timepiece to bear the fourth wheel, the cannon pinion and the hour wheel as well as the dial plate, whereby the productive cost of a watch is lessened.
  • the dial plate and the movement can be assembled without slippage therebetween when setting them, since the center of the dial plate and the center of the fourth wheel of the cannon pinion and of the hour wheel are home only by said guide bush. Furthermore, by removing the center pipe, a compact watch can be produced in a large quantities at a low cost.
  • a second arbor provided with a fourth wheel, a cannon pinion and an hour wheel respectively and rotatably mounted into the guide bush, said guide bush being fixedly mounted to the hour wheel guard plate such that said arbor, pinion and wheels are rotatably mounted into said guide bush and to said dial plate via said guide bush.
  • a timepiece as claimed in claim I wherein an end portion of said cannon pinion is supported to a base plate, said second arbor being rotatably positioned by a bearing which is provided in said base plate.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Road Signs Or Road Markings (AREA)
  • Road Repair (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
US531386A 1973-12-10 1974-12-10 Timepiece provided with a guide bush Expired - Lifetime US3916614A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1973140711U JPS5086570U (de) 1973-12-10 1973-12-10

Publications (1)

Publication Number Publication Date
US3916614A true US3916614A (en) 1975-11-04

Family

ID=15274931

Family Applications (1)

Application Number Title Priority Date Filing Date
US531386A Expired - Lifetime US3916614A (en) 1973-12-10 1974-12-10 Timepiece provided with a guide bush

Country Status (5)

Country Link
US (1) US3916614A (de)
JP (1) JPS5086570U (de)
CH (1) CH608931B (de)
GB (1) GB1459287A (de)
HK (1) HK13182A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000380A1 (en) * 1978-08-02 1980-03-06 Nii Chasovoj Promy Reductor for electromechanical wrist watches with stepping motor and central seconds hand
US4204395A (en) * 1977-05-20 1980-05-27 Kabushiki Kaisha Daini Seikosha Calendar mechanism of a portable timepiece
US4291398A (en) * 1978-07-25 1981-09-22 Kabushiki Kaisha Daini Seikosha Calendar display wheel guard construction of timepiece
US20100101589A1 (en) * 2008-10-28 2010-04-29 John Larkin Nelson Apparatus for enhancing a filter component of a smoking article, and associated method
US20200033810A1 (en) * 2015-12-21 2020-01-30 Eta Sa Manufacture Horlogere Suisse Motor group for watches

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525755Y2 (de) * 1974-08-14 1980-06-20
FR2749949B1 (fr) * 1996-06-18 1998-08-07 Ebauchesfabrik Eta Ag Mouvement d'horlogerie comportant un tube de guidage entre une platine et un pont

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523873A (en) * 1947-07-23 1950-09-26 Felsa S A Thrust disk for supporting axles in movements of timepieces

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523873A (en) * 1947-07-23 1950-09-26 Felsa S A Thrust disk for supporting axles in movements of timepieces

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4204395A (en) * 1977-05-20 1980-05-27 Kabushiki Kaisha Daini Seikosha Calendar mechanism of a portable timepiece
US4291398A (en) * 1978-07-25 1981-09-22 Kabushiki Kaisha Daini Seikosha Calendar display wheel guard construction of timepiece
WO1980000380A1 (en) * 1978-08-02 1980-03-06 Nii Chasovoj Promy Reductor for electromechanical wrist watches with stepping motor and central seconds hand
DE2952977C1 (de) * 1978-08-11 1982-10-28 Naučno-issledovatel'skij institut časovoj promyšlennosti, Moskva Getriebe elektronisch-mechanischer Armbanduhren mit einem Schrittmotor und einem zentralen Sekundenzeiger
US4378957A (en) * 1978-08-11 1983-04-05 Malkin Daniel D Reduction gear of electronic wristwatch with stepping motor and sweep second hand
US20100101589A1 (en) * 2008-10-28 2010-04-29 John Larkin Nelson Apparatus for enhancing a filter component of a smoking article, and associated method
US20200033810A1 (en) * 2015-12-21 2020-01-30 Eta Sa Manufacture Horlogere Suisse Motor group for watches

Also Published As

Publication number Publication date
CH608931GA3 (de) 1979-02-15
JPS5086570U (de) 1975-07-23
GB1459287A (en) 1976-12-22
HK13182A (en) 1982-04-02
CH608931B (fr)

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