US3523417A - Dial pin for a watch - Google Patents

Dial pin for a watch Download PDF

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Publication number
US3523417A
US3523417A US833054A US3523417DA US3523417A US 3523417 A US3523417 A US 3523417A US 833054 A US833054 A US 833054A US 3523417D A US3523417D A US 3523417DA US 3523417 A US3523417 A US 3523417A
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United States
Prior art keywords
dial
pin
dial pin
watch
plate
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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
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US833054A
Inventor
Katsuhiko Morita
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Seiko Instruments Inc
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Seiko Instruments Inc
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Publication date
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
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Publication of US3523417A publication Critical patent/US3523417A/en
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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
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/14—Fastening the dials to the clock or watch plates

Definitions

  • the fixing of the dial is ordinarily ensured by the construction wherein the point of the dial screw or the conical part of flush screw head in the tapped hole drilled in the side of the plate locks the dial foot.
  • This invention is directed to the remedy of these di advantages.
  • An object of this invention is the provision of a dial pin which can fix the dial easier and surer by using an eccentric pin instead of screw.
  • FIG. 1 is a plan view of embodiment of this invention.
  • FIG. 2 is a sectional view, taken along the line A-A' of FIG. 1.
  • 1 denotes the dial pin, comprising a thin cylindric portion 1a, a truncated conical collar portion 1b to engage at the dial foot 4 and a head portion 1c provided with a slot.
  • the dial 3 is provided with dial foot 4.
  • the thin cylindric portion 1a and the collar portion 1b are eccentric and the center of rotation of the dial pin 1 is that of the thin cylindric portion 1.
  • the thin cylindric portion 1a of said dial pin 1 tightly fits within an aperture in the plate 2, said tight fit permitting the rotation of said dial pin 1.
  • the fitting of the cylindric portion 1a within the aperture in the plate scarcely changes after rotation of said dial pin, due to the elastic effect of the cylindric portion 1a which forms a thin cylinder having center hole 1d.
  • the fitting of the said dial on the plate is easily achieved. Further, the loosening of the dial, the loosening of the dial pin and falling out of the said pin will not occur. Moreover, as there is no necessity for thread cutting, said pin can be manufactured at low cost.
  • a dial pin for a watch having a plate formed with a pair of spaced first and second apertures therein and a dial having a foot extending through a first of said apertures, said dial pin comprising a cylindric portion formed with a bore therethrough defining a tubular cross section dimensioned for snug receipt within said second plate aperture; and a head portion having a collar portion projecting radially outwardly from said cylindric portion and eccentrically disposed relative to said cylindric portion, said collar portion being tapered inwardly from the side thereof adjacent said cylindric portion, said collar portion being dimensioned so that one peripheral region thereof is engageable against said dial foot when said cylindric portion and said dial foot are positioned respectively in said first and second plate apertures and another peripheral portion thereof is not so engageable when said cylindric portion and dial foot are so positioned.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Supports Or Holders For Household Use (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Description

I 11, 197.0 KATSUHIKO MORITA 3,523,417
DIAL PIN FOR A WATCH Filed June 13, 1969 FIG./
' /c 4 /b E' 2 I 1 "11/4 f 1 1'. I rufl United States Patent Oflice 3,523,417 Patented Aug. 11, 1970 3,523,417 DIAL PIN FOR A WATCH Katsuhiko Morita, Tokyo, Japan, assignor to Kabushiki Kaisha Daini Seikosha, Tokyo, Japan Filed June 13, 1969, Ser. No. 833,054 Claims priority, application Japan, June 29, 1968, 43/ 54,764 Int. Cl. G04b 19/06 US. Cl. 58127 2 Claims ABSTRACT OF THE DISCLOSURE This invention relates to a dial pin for fixing a watch dial to the plate easily and surely.
The fixing of the dial is ordinarily ensured by the construction wherein the point of the dial screw or the conical part of flush screw head in the tapped hole drilled in the side of the plate locks the dial foot.
However, this construction heretofore used, has the disadvantage that after a long use or a slight shock the dial screw becomes loose, the dial loosens, and the dial screw drops into the movement and stops it.
This invention is directed to the remedy of these di advantages.
An object of this invention is the provision of a dial pin which can fix the dial easier and surer by using an eccentric pin instead of screw.
The invention will be better understood from the following description taken in connection with the accompanying drawings in which:
FIG. 1 is a plan view of embodiment of this invention.
FIG. 2 is a sectional view, taken along the line A-A' of FIG. 1.
Referring now to the drawings, 1 denotes the dial pin, comprising a thin cylindric portion 1a, a truncated conical collar portion 1b to engage at the dial foot 4 and a head portion 1c provided with a slot. The dial 3 is provided with dial foot 4. In said dial pin 1, the thin cylindric portion 1a and the collar portion 1b are eccentric and the center of rotation of the dial pin 1 is that of the thin cylindric portion 1. The thin cylindric portion 1a of said dial pin 1 tightly fits within an aperture in the plate 2, said tight fit permitting the rotation of said dial pin 1. The fitting of the cylindric portion 1a within the aperture in the plate scarcely changes after rotation of said dial pin, due to the elastic effect of the cylindric portion 1a which forms a thin cylinder having center hole 1d.
Cir
OPERATION OF DIAL PIN When setting of dial 3 on the plate 2, the collar portion 1b of the dial pin 1 is maintained away from the dial foot 4 as shown in FIG. 1 by a two-dot chain line. After setting the dial on the plate 2, the dial pin 1 is turned and thecollar portion 1b is driven into the dial foot 4, as shown in full line in FIG. 1 and in FIG. '2. As the dial pin 1 is provided with a slot in the head portion 10, said dial pin can be easily turned by a screwdriver. When so positioned, the force of the dial pin 1, in resisting the loosening of the dial 3 from plate 2, acts the direction whereof the dial pin is maintained against the plate. In addition, the dial pin 1 has an elasticity which tends to resist the turning of said dial pin 1 due to the loosening thereof.
According to the present invention, the fitting of the said dial on the plate is easily achieved. Further, the loosening of the dial, the loosening of the dial pin and falling out of the said pin will not occur. Moreover, as there is no necessity for thread cutting, said pin can be manufactured at low cost.
I claim:
1. A dial pin for a watch having a plate formed with a pair of spaced first and second apertures therein and a dial having a foot extending through a first of said apertures, said dial pin comprising a cylindric portion formed with a bore therethrough defining a tubular cross section dimensioned for snug receipt within said second plate aperture; and a head portion having a collar portion projecting radially outwardly from said cylindric portion and eccentrically disposed relative to said cylindric portion, said collar portion being tapered inwardly from the side thereof adjacent said cylindric portion, said collar portion being dimensioned so that one peripheral region thereof is engageable against said dial foot when said cylindric portion and said dial foot are positioned respectively in said first and second plate apertures and another peripheral portion thereof is not so engageable when said cylindric portion and dial foot are so positioned.
2. A dial pin as recited in claim 1, wherein said collar portion is frusto-conical, with the base thereof of greater diameter being adjacent said cylindric portion.
References Cited UNITED STATES PATENTS 77,267 4/1918 Switzerland.
STEPHEN I. TOMSKY, Primary Examiner O S. A. WAL, Assistant Examiner
US833054A 1968-06-29 1969-06-13 Dial pin for a watch Expired - Lifetime US3523417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5476468 1968-06-29

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US3523417A true US3523417A (en) 1970-08-11

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US833054A Expired - Lifetime US3523417A (en) 1968-06-29 1969-06-13 Dial pin for a watch

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GB (1) GB1229143A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213295A (en) * 1975-09-12 1980-07-22 Eta A.G. Ebauches-Fabrik Arrangement for securing a dial to a plate in a timepiece
EP0465988A1 (en) * 1990-07-12 1992-01-15 Fabrique D'ebauches De Sonceboz S.A. Device for fastening a dial foot of a time piece
US20120124814A1 (en) * 2010-11-23 2012-05-24 Eta Sa Manufacture Horlogere Method and device for securing a display element
US20210165369A1 (en) * 2019-12-03 2021-06-03 Eta Sa Manufacture Horlogère Suisse Device for fastening a horological external element or display element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH77267A (en) * 1917-11-01 1918-04-01 Brandt Calame Henri Device for fixing a dial to a timepiece
DE402776C (en) * 1924-09-22 Thommen S Uhrenfabriken Akt Ge Device for fastening the dial of pocket watches
DE451172C (en) * 1926-09-17 1927-10-21 Joseph Adolf Gaertner Attachment of the dial to pocket watches etc. like
US1911308A (en) * 1929-09-09 1933-05-30 Colomb Henri Attaching means for timepiece dials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE402776C (en) * 1924-09-22 Thommen S Uhrenfabriken Akt Ge Device for fastening the dial of pocket watches
CH77267A (en) * 1917-11-01 1918-04-01 Brandt Calame Henri Device for fixing a dial to a timepiece
DE451172C (en) * 1926-09-17 1927-10-21 Joseph Adolf Gaertner Attachment of the dial to pocket watches etc. like
US1911308A (en) * 1929-09-09 1933-05-30 Colomb Henri Attaching means for timepiece dials

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213295A (en) * 1975-09-12 1980-07-22 Eta A.G. Ebauches-Fabrik Arrangement for securing a dial to a plate in a timepiece
EP0465988A1 (en) * 1990-07-12 1992-01-15 Fabrique D'ebauches De Sonceboz S.A. Device for fastening a dial foot of a time piece
CH679628GA3 (en) * 1990-07-12 1992-03-31
US20120124814A1 (en) * 2010-11-23 2012-05-24 Eta Sa Manufacture Horlogere Method and device for securing a display element
US8763252B2 (en) * 2010-11-23 2014-07-01 Eta Sa Manufacture Horlogère Suisse Method and device for securing a display element
US20210165369A1 (en) * 2019-12-03 2021-06-03 Eta Sa Manufacture Horlogère Suisse Device for fastening a horological external element or display element
US11829109B2 (en) * 2019-12-03 2023-11-28 Eta Sa Manufacture Horlogère Suisse Device for fastening a horological external element or display element

Also Published As

Publication number Publication date
GB1229143A (en) 1971-04-21

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