US3678682A - Structure for positioning a watch stem - Google Patents

Structure for positioning a watch stem Download PDF

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Publication number
US3678682A
US3678682A US166798A US3678682DA US3678682A US 3678682 A US3678682 A US 3678682A US 166798 A US166798 A US 166798A US 3678682D A US3678682D A US 3678682DA US 3678682 A US3678682 A US 3678682A
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US
United States
Prior art keywords
stem
base plate
watch
tab
notch
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
US166798A
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English (en)
Inventor
Mamoru Miyasaka
Hirohisa Kurita
Hideo Furihata
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.)
Suwa Seikosha KK
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Suwa Seikosha KK
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 Suwa Seikosha KK filed Critical Suwa Seikosha KK
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Publication of US3678682A publication Critical patent/US3678682A/en
Anticipated expiration legal-status Critical
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    • 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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/02—Mechanical devices for setting the time indicating means by making use of the winding means
    • G04B27/04—Mechanical devices for setting the time indicating means by making use of the winding means with clutch wheel

Definitions

  • ABSTRACT A watch stem having annular grooves thereon is precisely positioned by means of a leaf spring held at one end to a base plate. Proximate the other end of the leaf spring a tab bent toward the base plate seats in one of the annular grooves. Second and third tabs span the watch stem in a diametral direction and prevent motion of the watch stem in a direction transverse to the axis. A fourth tab is positioned by the walls of a notch in a member fastened to the base plate. The leaf spring is thereby prevented from moving in a direction parallel to the axis of the stem.
  • FIG. 2 Claims, 3 Drawing Figures Patented July 25, 1972 FIG. 2
  • the axial position of the stem may vary.
  • the construction is such that it is difficult to obtain high precision either in the manufacture or in the operation.
  • Positioning of a watch stem axially in any of a plurality of positions is achieved by means of annular grooves thereon and a leaf spring fastened to a base plate.
  • the leaf spring has a bent-down tab which can seatin any of the annular grooves.
  • motion transverse to the longitudinal axis of the watch stem is prevented by bent-down tabs of the leaf spring which span the watch stem in a direction transverse to the axis of the watch stem.
  • precise positioning of the tab which seats in the grooves of the watch stem with respect to the axial direction is achieved by means of a bent-down tab at the free end of the leaf spring located in a notch in a member fastened to the base plate. Movement of the tab in an axial direction is prevented by the walls of the notch.
  • an object of the invention is precise positioning of a watch stem in an axial direction and in directions transverse to the axis.
  • Another object of the invention is precise positioning of a watch stern by means of grooves thereon and a precisely positioned leaf spring.
  • a further object of the invention is precise positioning of a watch stem by means of a minimum number of components and using a minimum amount of space.
  • FIG. 1 is an enlarged partial plan view of a watch stem positioning mechanism in accordance with the present invention
  • FIG. 2 is a side view in partial cross section of the same mechanism.
  • FIG. 3 is an end view in partial cross section of the same mechanism.
  • holding member 6 Possible rotation of holding member 6 about screw 15 as a pivot is prevented by element 12, secured to base plate 5, and having a notch 13.
  • L-shaped tab 14 at the end of holding member 6 is positioned in notch 13 and is constrained against motion parallel to the axis of the watch stem by the walls forming notch 13.
  • the watch stem is precisely located in both radial and axial directions.
  • the spring which provides the above advantages is essentially flat and is simple to manufacture.
  • the mechanism can be used for a calendar watch, for the lever of a chronograph and for adjusting the rate of a watch.
  • a mechanism for precise positioning of a movable watch stem comprising a base plate, a watch stem mounted for axial and rotational movement on said base plate and having a plurality of grooves thereon, and a flexible spring member having an end and fixed proximate said end to said base plate and having a first tab for resilient engagement with a groove on said stern and for thereby locating said stem precisely in an axial direction and having second and third tabs positioned proximate said stem for fixing the position of said stem in a direction essentially parallel to said base plate and transverse to the longitudinal axis of said stem.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
US166798A 1970-07-31 1971-07-28 Structure for positioning a watch stem Expired - Lifetime US3678682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45066508A JPS511146B1 (enrdf_load_stackoverflow) 1970-07-31 1970-07-31

Publications (1)

Publication Number Publication Date
US3678682A true US3678682A (en) 1972-07-25

Family

ID=13317829

Family Applications (1)

Application Number Title Priority Date Filing Date
US166798A Expired - Lifetime US3678682A (en) 1970-07-31 1971-07-28 Structure for positioning a watch stem

Country Status (4)

Country Link
US (1) US3678682A (enrdf_load_stackoverflow)
JP (1) JPS511146B1 (enrdf_load_stackoverflow)
GB (1) GB1343541A (enrdf_load_stackoverflow)
HK (1) HK5577A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49141160U (enrdf_load_stackoverflow) * 1973-03-31 1974-12-05
JPS518157U (enrdf_load_stackoverflow) * 1974-07-04 1976-01-21
US4126992A (en) * 1974-12-26 1978-11-28 Kabushiki Kaisha Daini Seikosha Stem mechanism for a watch
US4228647A (en) * 1977-06-07 1980-10-21 Kabushiki Kaisha Daini Seikosha Click mechanism of a timepiece

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7484259B2 (ja) * 2020-03-17 2024-05-16 カシオ計算機株式会社 指針、時計及び指針の製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US918759A (en) * 1908-12-30 1909-04-20 Henry W Matalene Stem winding and setting watch.
CH71827A (fr) * 1916-12-14 1916-02-16 Freres Baumgartner Mouvement de montre
US1172601A (en) * 1915-11-09 1916-02-22 Auguste Jaques Watch.
CH71945A (fr) * 1915-07-07 1916-08-01 Henri Albert Didisheim Fabriqu Mécanisme de remontage et de mise à l'heure négative avec dispositif pour limiter la course axiale vers l'extérieur de la tige de couronne
US2228681A (en) * 1938-12-08 1941-01-14 Waterbury Clock Company Watch construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US918759A (en) * 1908-12-30 1909-04-20 Henry W Matalene Stem winding and setting watch.
CH71945A (fr) * 1915-07-07 1916-08-01 Henri Albert Didisheim Fabriqu Mécanisme de remontage et de mise à l'heure négative avec dispositif pour limiter la course axiale vers l'extérieur de la tige de couronne
US1172601A (en) * 1915-11-09 1916-02-22 Auguste Jaques Watch.
CH71827A (fr) * 1916-12-14 1916-02-16 Freres Baumgartner Mouvement de montre
US2228681A (en) * 1938-12-08 1941-01-14 Waterbury Clock Company Watch construction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49141160U (enrdf_load_stackoverflow) * 1973-03-31 1974-12-05
JPS518157U (enrdf_load_stackoverflow) * 1974-07-04 1976-01-21
US4126992A (en) * 1974-12-26 1978-11-28 Kabushiki Kaisha Daini Seikosha Stem mechanism for a watch
US4228647A (en) * 1977-06-07 1980-10-21 Kabushiki Kaisha Daini Seikosha Click mechanism of a timepiece

Also Published As

Publication number Publication date
DE2137565B2 (de) 1973-10-04
DE2137565A1 (de) 1972-02-03
GB1343541A (en) 1974-01-10
JPS511146B1 (enrdf_load_stackoverflow) 1976-01-14
HK5577A (en) 1977-02-04

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