US3662536A - Device for hermetically sealing the opening for the winding stem in a watch dome - Google Patents

Device for hermetically sealing the opening for the winding stem in a watch dome Download PDF

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Publication number
US3662536A
US3662536A US99992A US3662536DA US3662536A US 3662536 A US3662536 A US 3662536A US 99992 A US99992 A US 99992A US 3662536D A US3662536D A US 3662536DA US 3662536 A US3662536 A US 3662536A
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US
United States
Prior art keywords
cap
crown
dome
winding stem
stem
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
US99992A
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English (en)
Inventor
Walter Stebler
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.)
Individual
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Individual
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
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Publication of US3662536A publication Critical patent/US3662536A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/10—Hermetic sealing of openings, joints, passages or slits of winding stems

Definitions

  • the purpose of the present invention is thus to create a device of the kind described which can carry out the task it is supposed to do in a better way than was previously the case.
  • the device according to the invention is characterized by the fact that a hollow crown is provided at one end of the winding stem, this crown having a circularlyshaped wall extending around a fixed projecting part of the device, and that this fixed part comprises at least one sealing ring, a support element and a cap which overlaps the ring, said cap being supported on a fixed base with a press fit in such a way that the sealing ring is pressed against the support element in the axial direction.
  • the device which is represented in FIG. I has a hollow crown l which is screwed into the outer end of the winding stem 2, the wall of said crown extending about the fixed part of the device.
  • This fixed part is composed of the tube 5, the sealing rings 7 and l l, the casing 8 and the cap 12.
  • the fastening of the tube 5 onto the outside wall of the dome 4 is provided by means of inserting its inside end into a cylindrical opening 3 which passes through the wall.
  • the band 6 of the tube 5 lies on the outside surface of the dome and the part of the tube 5 which juts outwards serves as the guide element for the sealing ring 7 cut off with a rectangular cross section.
  • Ring 7 surrounds the tube 5 over the entire length of its outside part and lies against the outer wall of the dome 4.
  • the tubular-shaped easing 8 is also provided for securing the ring 7.
  • the inside diameter of the casing is selected in such a way that the casing lies against the ring 7 with a press fit.
  • the casing 8 has in its outside areas a ring-shaped flat shoulder 9.
  • the upper part of this casing which is limited by the cylindrical surface 10, has a smaller thickness than the lower part.
  • a second sealing ring 11 and a cap 12 are also belonging to the fixed part of the device.
  • the sealing ring 11 which is formed with a rectangular cross section, the height of which is smaller than the thickness, has a central opening the inside diameter of which is adjusted to that of the winding bar.
  • the diameter of the bar can be 0.45 mm and the outside diameter of the tube which corresponds to the inside diameter of the sealing ring 7 can be 0.8 mm.
  • the cap 12 has the shape of a small dome or shell which is formed of a cylindrical side wall and a bottom, whereby the bottom has a central opening 13 which is of somewhat greater dimensions than the dome itself and which pennits the passing of the bar through the bottom of the cap.
  • the bottom of the cap 12 has a flat inside surface which presses against the sealing ring 11.
  • the outside surface of the bottom has a curved convex shapewhich corresponds to the shape of the inside surface of the hollow space 14 of the crown.
  • an additional smaller packing 11a is interposed in an expanded part of the hole 13, which runs into the inside surface of the bottom of the cap.
  • the fastening of the cap 124; onto the fixed part of the device is done by pressing the wall of the cap 12 onto the outside surface 10 of the casing 8.
  • the crown 1 For its fastening to the end of the stem 2 the crown 1 has a dull threaded hole 15 which is provided in the bottom of the hollow space of the crown and into which the end of the stem 2 is screwed.
  • the hollow space of the crown comprises the tube 5, the sealing rings 7 and 11 and the parts 8 and 12 which fasten the sealing rings to the tube 5.
  • the solid part of the device thus extends all the way inside the top of the crown.
  • the contact surfaces through which dust and water can penetrate into the dome are reduced to a minimum, since their diameter is the same as that of the stem. Furthermore, the fixed parts of the device can be designed in such a way that these parts can secure the two sealing rings 7 and 11 between them with absolute reliability without imparting excessive dimensions to the device.
  • FIG. 2 An embodiment is shown in FIG. 2 in which the crown I and the winding stem 2 are arranged in the same way-as in FIG. 1. Furthermore, the opening 3 which is provided in the dome 4 and is intended for the passing through of the winding stem 2 can have the same dimensions as in FIG. 1.
  • the tube 16 has a band 17 of rectangular shape in the part which projects from the dome 4.
  • the shape of the cap 18 is similar to that of the cap 12. Its side wall, however, is somewhat wider and is pressed against the outside surface of the band 17.
  • the main difference between the two forms of design described here is that instead of the two sealing rings 11 and 7 only one sealing ring 19 is provided for in the second form of design.
  • the profile of the ring 19 has the form of an angle the horizontal part of which is pressed in the axial direction between the upper edge of the tube 16 and the bottom of the cap 18.
  • the ring 19 also has a side wall which is pressed in the radial direction between the tube itself and the side wall of the cap 18.
  • the slackness (play) which exists between the stem 2 and the inside wall of the tube 16 allows the ring 19 to deform itself so that, under the effect of the forces exerted through the cap, it lies on the side surface of the stem 2 and assures the tightness of the passage of the stem through the tube.
  • the arrangement described permits the passage of the bar through the dome wall up to a pressure of 40-50 atm with a margin of safety of 100 percent of remaining completely airtight.
  • the additional packing 11a can also be arranged in one of the milled recesses in the bent outside surface of the cap 12. Because of the simpler construction, however, the arrangement in FIG. 1 with the packing immersed in the inside surface of the bottom is to be preferred.
  • a device for hermetically sealing the opening in a watch dome for a winding stem comprising a hollow crown which is fastened to an end of said stem, said crown having a circularshaped wall which extends over a protruding fixed part of the device, said fixed part having a plurality of tubular-shaped holding parts which are arranged coaxially to said stem and a cap which is supported on the outside tubular-shaped part with a press fit, a first sealing ring provided between said holding parts and a second sealing ring disposed between the upper edges of said holding parts and said cap, said sealing rings being pressed against one another through said cap.
  • a device wherein the hollow space of said crown has a bent inside surface, the outside surface of the cap which is turned against said inside surface being correspondingly bent.
  • a device wherein said winding stem passes through said sealing rings and said cap, and the bottom of said crown has a dull threaded hole into which said winding stem is screwed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
US99992A 1969-12-23 1970-12-21 Device for hermetically sealing the opening for the winding stem in a watch dome Expired - Lifetime US3662536A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1912069A CH517334A (de) 1969-12-23 1969-12-23 Vorrichtung zur hermetischen Abdichtung der Durchführung für die Aufzugswelle in einer Uhrenschale

Publications (1)

Publication Number Publication Date
US3662536A true US3662536A (en) 1972-05-16

Family

ID=4437486

Family Applications (1)

Application Number Title Priority Date Filing Date
US99992A Expired - Lifetime US3662536A (en) 1969-12-23 1970-12-21 Device for hermetically sealing the opening for the winding stem in a watch dome

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US (1) US3662536A (enrdf_load_stackoverflow)
CH (2) CH517334A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD462919S1 (en) 2002-03-26 2002-09-17 Concord Watch Company S.A. Crown protector
USD464274S1 (en) 2002-03-26 2002-10-15 Concord Watch Company S.A. Saratoga watch
CN1945465B (zh) * 2005-10-05 2010-12-08 精工电子有限公司 表

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284594A (en) * 1940-05-20 1942-05-26 Schmitz Otto Air and water tight watch stem
US2771734A (en) * 1953-05-06 1956-11-27 Morf Ernest Watch crown seal
CH331280A (fr) * 1955-12-21 1958-07-15 Morf Ernest Couronne étanche pour appareil de mesure, notamment pour montre
US3164954A (en) * 1955-10-25 1965-01-12 Soguel Rene Sealing means for an annular passage formed between two coaxial portions of a pair of units movable with respect to one another
US3178879A (en) * 1962-12-27 1965-04-20 Nardin Pierre-Antoine Control device for a mechanism located in a casing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284594A (en) * 1940-05-20 1942-05-26 Schmitz Otto Air and water tight watch stem
US2771734A (en) * 1953-05-06 1956-11-27 Morf Ernest Watch crown seal
US3164954A (en) * 1955-10-25 1965-01-12 Soguel Rene Sealing means for an annular passage formed between two coaxial portions of a pair of units movable with respect to one another
CH331280A (fr) * 1955-12-21 1958-07-15 Morf Ernest Couronne étanche pour appareil de mesure, notamment pour montre
US3178879A (en) * 1962-12-27 1965-04-20 Nardin Pierre-Antoine Control device for a mechanism located in a casing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD462919S1 (en) 2002-03-26 2002-09-17 Concord Watch Company S.A. Crown protector
USD464274S1 (en) 2002-03-26 2002-10-15 Concord Watch Company S.A. Saratoga watch
CN1945465B (zh) * 2005-10-05 2010-12-08 精工电子有限公司 表

Also Published As

Publication number Publication date
CH517334A (de) 1971-06-30
CH1912069A4 (enrdf_load_stackoverflow) 1971-06-30

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