US3722208A - Hermetic watch-case - Google Patents
Hermetic watch-case Download PDFInfo
- Publication number
- US3722208A US3722208A US00259692A US3722208DA US3722208A US 3722208 A US3722208 A US 3722208A US 00259692 A US00259692 A US 00259692A US 3722208D A US3722208D A US 3722208DA US 3722208 A US3722208 A US 3722208A
- Authority
- US
- United States
- Prior art keywords
- watch
- ring
- case
- case according
- shoulder
- 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
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000013013 elastic material Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 6
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000010956 nickel silver Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- QEVHRUUCFGRFIF-MDEJGZGSSA-N reserpine Chemical compound O([C@H]1[C@@H]([C@H]([C@H]2C[C@@H]3C4=C(C5=CC=C(OC)C=C5N4)CCN3C[C@H]2C1)C(=O)OC)OC)C(=O)C1=CC(OC)=C(OC)C(OC)=C1 QEVHRUUCFGRFIF-MDEJGZGSSA-N 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Images
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
- G04B37/00—Cases
- G04B37/08—Hermetic sealing of openings, joints, passages or slits
- G04B37/11—Hermetic sealing of openings, joints, passages or slits of the back cover of pocket or wrist watches
Definitions
- Hermetic watch-cases are already known, in which back is connected to middle by a hermetic seal which is tightened by a ring, itself screwed into a thread of the middles wall against an inner shoulder of the middle. These are round watch-cases in which the cross-section of the hermetic ring is rectangular or triangular.
- the hermetic ring is made of a material of relatively low elasticity and requires considerable tightening between fasteningring and middle'so as to be forced back inside.
- the ring screwed in the thread of the middle compresses the seal in centripetal fashion so it rests against the back s outer cylindrical wall or else so as to engage it in a groove of the backs wall.
- the main object of this invention is to embody or ensure a hermetic watch-case with rigid connection between back and middle by means inherently simple and eliminating entirely the danger of metal chips entering the space holding the movement.
- the watch-case according to the invention is characterized by the middle being provided on its inner side with a groove of triangular cross-section, of which the lower flank makes a larger angle with the case axis than the upper flank, by the back being provided with an oblique shoulder located opposite said groove and with a central threaded step, by a rigid ring being screwed in the back s thread, such ring being provided with a shoulder that is obliquely opposite and axially displaced toward the outside with respect to the backs oblique shoulder, by the joint being made of an elastic material which is forced back radially toward the outside by said shoulders when the ring is being screwed-in and is engaging said groove.
- the single figure drawing shows in fragmentary axial section a watch-case according to the invention.
- Middle 1 also is provided with another plane around shoulder 9 extending along the middles periphery and directed towards the rear of the case, this shoulder being meant to support the edge of the cylindrical lateral wall 10 which is located atthe periphery of back 11. Height-wise, this shoulder extends a little above the axis of tube 4; wall 10 is provided with 'a hollow 12 engaging the inner, projecting end of tube 4 during casing. Therefore back 11 is prevented from rotating about its axis when the two parts 1 and 11 are being assembled and fastened to one another.
- This assembly arrangement comprises on one hand a V-groove 13 in the inner cylindrical side of middle 1 and below'tube 4, and on the other hand a natural or synthetic rubber joint of circular shape, 14, preferably a toroidal seal, and finally a compression annulus l5 and a threaded ring 16.
- Seal 14, annulus 15 and ring 16 rest on the back 11.
- back 11 is provided on its outer lateral side with a first plane annular shoulder 17 which is limited on the inside by a shoulder 18 in the shape of a frustrum of a cone and a second shoulder or step 19 for guiding and centering annulus 15, which freely fits onto this step.
- this annulus 15 has a cross-section symmetric with that of the lower part of wall 10 and its lower side is plane.
- annulus 15 might be eliminated or made in one piece with ring 16.
- annulus allows vigorous tightening of the ring 16 without danger the seal be dragged along.
- annular seal 14 together with its fastening means 17, 15, 16 require no greater volume than would be the fastening parts in a conventional arrangement comprising a back directly screwed into the middle with a seal interposed.
- tightening the back against the middles shoulder 9 by compressing the very elastic, toroidal seal 14 at the same time fastens circle 7 in-between a frustrum-of-cone shoulder and another shoulder 8 of the middle.
- a hermetic watch-case comprising a middle, a back provided with a lateral wall engaging or entering the middles inside, a seal of elastic material, said middle being provided on its inner side with a groove of triangular cross-section of which the lower flank makes a larger angle with the case axis than does the upper flank, said back being provided with an oblique shoulder located opposite said groove as well as with a central threaded area, a rigid ring in threaded engagement with the backs threaded area, said ring being provided with an oblique shoulder that is opposite and axially displaced outwards with respect to the 'backs oblique shoulder, said seal being radially forced outward by said shoulders when the ring is being screwed inwardly and enters said groove, said elastic seal isolating the interior of the watch from any cuttings resulting from the mutual engagement of the threads in the threaded area.
- a watch-case according to claim 1 in which the middle and the back are circular in shape and said back and ring shoulders are of frusto conical shape.
- a watch-case according to claim 2 in which the seal is made of a highly elastic material in the shape of a torus.
- a watch-case according to claim 1 in which said rigid ring is made up of two annular parts of which one is screwed to the back and of which the other makes up said oblique shoulder, those two parts being separated along a plane which is normal to the case axis.
- a watch-case according to claim 1 in which the backs wall presses against an internal shoulder of the middle.
- watch-case according to claim 6 in which there is an internal projection at the middle and the periphery of the back wall defines a hollow which engages said intemal projection of the middle in order to prevent any rotation of the back with respect to the middle.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gasket Seals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH853871 | 1971-06-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3722208A true US3722208A (en) | 1973-03-27 |
Family
ID=4341703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00259692A Expired - Lifetime US3722208A (en) | 1971-06-11 | 1972-06-05 | Hermetic watch-case |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3722208A (fr) |
| CH (1) | CH853871A4 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200086321A (ko) * | 2017-12-15 | 2020-07-16 | 더 스와치 그룹 리서치 앤 디벨롭먼트 엘티디 | 타임피스 케이스에 대한 개폐 시스템 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1268821A (en) * | 1917-10-06 | 1918-06-11 | Charles L Depollier | Watchcase. |
| CH297482A (fr) * | 1952-02-09 | 1954-03-31 | Piquerez Erwin | Montre étanche. |
| FR1147385A (fr) * | 1955-10-29 | 1957-11-22 | Richard Pfisterer | Boîtier de montre étanche à l'eau avec dispositif de fermeture par vissage |
| US2909893A (en) * | 1954-06-19 | 1959-10-27 | Fiechter Jean Jacques | Watch case |
| DE2004053A1 (de) * | 1969-02-05 | 1970-08-20 | Manuf De Boites De Montres Mrp | Uhr mit einer elastischen Aufhaengevorrichtung |
-
1971
- 1971-06-11 CH CH853871D patent/CH853871A4/fr unknown
-
1972
- 1972-06-05 US US00259692A patent/US3722208A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1268821A (en) * | 1917-10-06 | 1918-06-11 | Charles L Depollier | Watchcase. |
| CH297482A (fr) * | 1952-02-09 | 1954-03-31 | Piquerez Erwin | Montre étanche. |
| US2909893A (en) * | 1954-06-19 | 1959-10-27 | Fiechter Jean Jacques | Watch case |
| FR1147385A (fr) * | 1955-10-29 | 1957-11-22 | Richard Pfisterer | Boîtier de montre étanche à l'eau avec dispositif de fermeture par vissage |
| DE2004053A1 (de) * | 1969-02-05 | 1970-08-20 | Manuf De Boites De Montres Mrp | Uhr mit einer elastischen Aufhaengevorrichtung |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200086321A (ko) * | 2017-12-15 | 2020-07-16 | 더 스와치 그룹 리서치 앤 디벨롭먼트 엘티디 | 타임피스 케이스에 대한 개폐 시스템 |
| US11803158B2 (en) | 2017-12-15 | 2023-10-31 | The Swatch Group Research And Development Ltd | Closing/opening system for a timepiece case |
Also Published As
| Publication number | Publication date |
|---|---|
| CH853871A4 (fr) | 1974-12-13 |
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