US2607082A - Method of assembling crystals in watch bezels - Google Patents

Method of assembling crystals in watch bezels Download PDF

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Publication number
US2607082A
US2607082A US764978A US76497847A US2607082A US 2607082 A US2607082 A US 2607082A US 764978 A US764978 A US 764978A US 76497847 A US76497847 A US 76497847A US 2607082 A US2607082 A US 2607082A
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crystal
bezel
flange
opening
watch
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US764978A
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Otto A Starke
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STAR WATCH CASE Co
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STAR WATCH CASE Co
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/06—Devices for shaping or setting watch glasses
    • G04D3/067—Setting or taking apart, whereby a temporary deformation of the glass may take place

Definitions

  • This invention relates to improvements in the method of assembling crystals in Watch bezels.
  • Fiith. to provide a method for inexpensively sealingathermoplastic, watch crystal to a bezel.
  • Thedrawings of which there is one sheet, illustrate three forms of my watch crystal as assembled ina bezel and certainsteps in the assembly thereof.
  • Fig. 1 is a plan. view of a wrist watch case.
  • Fig. 2 is a fragmentary cross sectional view through the crystal and bezel along the line 22 in Fig. 1.
  • FIG. 3 is a fragmentary cross sectional view of a modified form of crystal and bezel.
  • Fig. 4 is an enlarged fragmentary cross sectional view showing one step in the assembly of my crystal and bezel.
  • Fig. 5 is a view similar to Fig. 4 showing a third form of my crystal and its method of assembly.
  • Fig. 6 is an elevational view illustrating conventionally a step in the assembly of my crystal and bezel.
  • the drawings illustrate a watch case I having a bezel 2 arranged to be secured to and support a crystal 3.
  • the bezel 2 is provided .with a rearwardly extending flange 4 arranged to be snap fitted to the ring of the watch case in the usual fashion and a radially inwardly extending flange 5 arranged to engage the crystal.
  • the flange 5 slopes slightly forwardly of the crystal opening.
  • the drawings illustrate a case and bezel of quadrilateral contour having curved sides but obviously other contours and other decorative flange and shoulder arrange ments such as the shoulders 6 may be devised.
  • the bezel has no reflector portion.
  • the crystal 3 is made of unbreakable plastic material having thermoplastic properties and is preferably provided with an outwardly convex lens section 3
  • the outer surface of the flange l defines a groove 8 extending around the periphery of the crystal and the outer surface of the flange l is beveled radially inwardly as at 9 and Ill away from the edges of the groove so that the crystal shown in Figs. 2 and 1 may be pressed into the opening defined by the flange 5 of the bezel either from the inside or outside of the bezel.
  • the crystal shown in Fig. 3 is beveled on one side of the groove only at IOA.
  • the crystal 3 and the opening in th flange 5 of the bezel are preferably so proportioned in their unstressed and initially prepared stage that when the crystal is pressed into the bezel it will be slightly flexed or placed under strain and assume the position shown in full lines in Fig. 4 in which the flange 1 is compressed radially inwardly of the bezel so that the inner surface of the flange 5 does not seat accurately with the bottom of the groove 8 in the crystal.
  • the metal of the bezel is heated sufiiciently by induction by well known principles to soften the plastic of the flange 1 so that the stresses in the crystal cause the flange to expand into the final position shown in Fig. 2 and by the dotted lines in Fig. 4 and cause the plastic of the crystal to be sealed tightly to the flange 5 of the bezel. After thus sealing the crystal to the bezel it is obviously impossible for the crystal to be shaken or jarred from the bezel and impossible for dirt or moisture to enter the watch case between the crystal and bezel.
  • the flange of the crystal is beveled only as at IUA and arranged to be inserted into the bezel from the outside, it being impractical to press the straight edge 9A outwardly from the inside of the bezel.
  • the example of this crystal shown in Figs. 2 and 4 may be pressed inwardly or outwardly through the bezel opening but I prefer to press the crystal inwardly since any scratches which may occur on the beveled edges l0 and 1A are then concealed within the bezel leaving the outside of the crystal unmarred.
  • the grooves on the crystal flange engage the bezel so that it is impossible to press the crystal inwardly against the face of the watch and thus damage the movement.
  • FIG. 5 A third form of my crystal assembly is illustrated in Fig. 5.
  • the flange IE on this crystal is beveled to the rear as at B and preferably but not necessarily provided with a shoulder l4 forming a stop to limit the distance the crystal may be pressed through the bezel flange 5 from the front.
  • the front edge of the crystal flange may be beveled or not as desired as shown at 9B.
  • the outside of the crystal flange is ungrooved in its initially prepared form.
  • the crystal When the crystal is pressed into the bezel it is stressed and bowed into the position shown in an exaggerated manner in full lines in Fig. 5.
  • the bezel When the bezel is heated as previously described localized heat and pressure will be applied to the crystal along the inner edges of the bezel flange. The crystal will become sufficiently plastic along its line of contact with the bezel to flow around the edges of the bezel flange and assume the position shown by the dotted lines in Fig. 5.
  • the crystal and bezel thus form their own tongue and groove sealing connections.
  • the method of assembling a watch crystal and bezel which comprises the steps of providing a metallic bezel having a radiallyinwardly projecting flange defining a crystal opening, providing a crystal of thermoplastic material having a domed lens portion with a rearwardly extending flange formed therearound, forming a radially outwardly opening groove in said crystal flange completely therearound and forming outer surfaces on said flange sloping radially inwardly from said groove with the radially outer edges of said surfaces and the base of said groove of slightly larger radial dimension than the corresponding, radial dimension of said opening, pressing said crystal inwardly through said opening until said bezel flan e.
  • the method of assembling a watch crystal and bezel which comprises the steps of providing a metallic bezel having a radially inwardly projecting flange defining a crystal opening, providing a crystal of thermoplastic material having a domed lens portion with a rearwardly extending flange formed therearound, forming a radially outwardly opening groove in said crystal flange completely therearound and forming outer surfaces on said flange sloping radially inwardly from said groove with the radially outer edges of said surfaces and the base of said groove of slightly larger radial dimension than the corresponding radial dimension of said opening, pressing said crystal outwardly through said opening 'until said bezel flange registers with the said groove and with said crystal in stressed condition, and subjecting said bezel and crystal to induction heating to cause said crystal flange to be softened and sealed to said bezel flange and to relieve the stressed condition of said crystal.
  • the method of assembling a watch crystal and bezel which comprises the steps of providing a metallic bezel having a radially inwardly projecting flange defining a crystal opening, providing a crystal of thermoplastic material having a domed lens portion with a rearwardly extending flange formed therearound, forming a radially outwardly opening groove in said crystal flange completely therearound and forming an outer surface sloping radially inwardly from an edge of said groove with the radially outer edge of said surface and the base of said groove of slightly larger radial dimension than the corresponding radial dimension of said opening pressing said crystal and said surface through said opening until said bezel flange registers with the said groove and subjecting said bezel and crystal to heating to cause said crystal flange to be softened and sealed to said bezel flange.
  • the method of assembling a watch crystal and bezel which comprises the steps of providing a bezel having a radially inwardly projecting flange defining a crystal opening, providing a crystal of thermoplastic material having a domed lens portion with a rearwardly extending flange formed therearound, forming a radially outwardly extending shoulder on the outside of said crystal flange and completely therearound and forming an outer surface sloping radially inwardly from said shoulder with the inner edge of said shoulder of greater radial dimension than the corresponding radial dimension of said flange, pressing the sloping surface of said crystal through said opening until said bezel flange seats against said shoulder, and subjecting said bezel and crystal to heating to cause said crystal flange to be softened and sealed to said bezel flange, said heat being applied to said bezel and crystal flanges circumferentially thereof and adjacent thereto to facilitate softening the thermoplastic material of the crystal flange only where said flanges contact.
  • the method of assembling a watch crystal and bezel which comprises the steps of providing a bezel having a crystal opening.
  • the method of assembling a watch crystal and bezel which comprises the steps of providing a bezel having a crystal opening, providing a crystal of thermoplastic material having a lens portion and a rearwardly turned flange therearound, said crystal flange in its initial prepared form having an outer portion of slightly larger diametrical measurement than the corresponding diametrical measurement of said crystal opening, pressing said flange through said opening to mutually and oppositely stress said bezel and crystal, and subjecting said bezel and crystal to heat with the greatest intensity at and adjacent the circumference of the bezel opening and crystal flange to cause said crystal flange to be plasticized and deformed only at and closely adjacent the edge of the bezel opening.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Description

Aug. 19, 1952 O STARKE 2,607,082
METHOD OF ASSEMBL'ING CRYSTALS IN WATCH BEZELS Filed July 51, 1947 INVENTOR.
BY @WMQ ATTORN EY Patented Aug. 19, 1952 Lamar METHOD OF ASSEMBLING CRYSTALS IN WATCH BEZELS Otto A. Starke, Ludington, Mich., assignor to Star Watch Case Company, Ludington, Mich.
' Application July 31, 1947, Serial No. 764,978
6 Claims. 1
This invention relates to improvements in the method of assembling crystals in Watch bezels.
The principal objects of this invention are:
First, to provide a watch crystal and bezel for holding the crystal on a watch which will effectively seal the crystal. and bezel against the entrance of moisture and dirt.
Second, to provide a watch crystaland bezel assembly which may be easily assembled without producing visible scratches on the crystal.
- Third, to provide a method of assemblin an unbreakable watch crystal on a bezel so that the crystal cannot belost.
Fourth, to provide a watch crystal which cannot. be pushed against the race of the watch and damage the watch movement.-
Fiith. to provide a method for inexpensively sealingathermoplastic, watch crystal to a bezel.
.Other objects and advantages relating to the details and economies ofthe invention will be apparent from the following description and claims.
Thedrawings, of which there is one sheet, illustrate three forms of my watch crystal as assembled ina bezel and certainsteps in the assembly thereof.
Fig. 1 is a plan. view of a wrist watch case.
Fig. 2 is a fragmentary cross sectional view through the crystal and bezel along the line 22 in Fig. 1.
- Fig. 3 is a fragmentary cross sectional view of a modified form of crystal and bezel.
' Fig. 4 is an enlarged fragmentary cross sectional view showing one step in the assembly of my crystal and bezel.
Fig. 5 is a view similar to Fig. 4 showing a third form of my crystal and its method of assembly.
Fig. 6 is an elevational view illustrating conventionally a step in the assembly of my crystal and bezel.
The drawings illustrate a watch case I having a bezel 2 arranged to be secured to and support a crystal 3. As is more particularly shown in the cross sectional views the bezel 2 is provided .with a rearwardly extending flange 4 arranged to be snap fitted to the ring of the watch case in the usual fashion and a radially inwardly extending flange 5 arranged to engage the crystal. Preferably the flange 5 slopes slightly forwardly of the crystal opening. The drawings illustrate a case and bezel of quadrilateral contour having curved sides but obviously other contours and other decorative flange and shoulder arrange ments such as the shoulders 6 may be devised. The bezel has no reflector portion.
The crystal 3 is made of unbreakable plastic material having thermoplastic properties and is preferably provided with an outwardly convex lens section 3|, the periphery of which is provided with a rearwardly turned flange 1. The outer surface of the flange l defines a groove 8 extending around the periphery of the crystal and the outer surface of the flange l is beveled radially inwardly as at 9 and Ill away from the edges of the groove so that the crystal shown in Figs. 2 and 1 may be pressed into the opening defined by the flange 5 of the bezel either from the inside or outside of the bezel. The crystal shown in Fig. 3 is beveled on one side of the groove only at IOA.
The crystal 3 and the opening in th flange 5 of the bezel are preferably so proportioned in their unstressed and initially prepared stage that when the crystal is pressed into the bezel it will be slightly flexed or placed under strain and assume the position shown in full lines in Fig. 4 in which the flange 1 is compressed radially inwardly of the bezel so that the inner surface of the flange 5 does not seat accurately with the bottom of the groove 8 in the crystal. I then place the bezel and crystal on a suitable support II as shown in Fig. 6 within the coils l2 of an induction heater. When the coils I2 are energized with a high frequency current from the alternator 13, the metal of the bezel is heated sufiiciently by induction by well known principles to soften the plastic of the flange 1 so that the stresses in the crystal cause the flange to expand into the final position shown in Fig. 2 and by the dotted lines in Fig. 4 and cause the plastic of the crystal to be sealed tightly to the flange 5 of the bezel. After thus sealing the crystal to the bezel it is obviously impossible for the crystal to be shaken or jarred from the bezel and impossible for dirt or moisture to enter the watch case between the crystal and bezel.
In the modified form of crystal and bezel shown in Fig. 3 the flange of the crystal is beveled only as at IUA and arranged to be inserted into the bezel from the outside, it being impractical to press the straight edge 9A outwardly from the inside of the bezel. The example of this crystal shown in Figs. 2 and 4 may be pressed inwardly or outwardly through the bezel opening but I prefer to press the crystal inwardly since any scratches which may occur on the beveled edges l0 and 1A are then concealed within the bezel leaving the outside of the crystal unmarred. In each form of the crystal the grooves on the crystal flange engage the bezel so that it is impossible to press the crystal inwardly against the face of the watch and thus damage the movement.
I have thus described two highly practical commercial embodiments of my crystal and bezel together with the steps for assembling them. A third form of my crystal assembly is illustrated in Fig. 5. The flange IE on this crystal is beveled to the rear as at B and preferably but not necessarily provided with a shoulder l4 forming a stop to limit the distance the crystal may be pressed through the bezel flange 5 from the front. The front edge of the crystal flange may be beveled or not as desired as shown at 9B.
Aside from the shoulder [4, which is optional, the outside of the crystal flange is ungrooved in its initially prepared form. When the crystal is pressed into the bezel it is stressed and bowed into the position shown in an exaggerated manner in full lines in Fig. 5. When the bezel is heated as previously described localized heat and pressure will be applied to the crystal along the inner edges of the bezel flange. The crystal will become sufficiently plastic along its line of contact with the bezel to flow around the edges of the bezel flange and assume the position shown by the dotted lines in Fig. 5. The crystal and bezel thus form their own tongue and groove sealing connections.
Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:
1. The method of assembling a watch crystal and bezel which comprises the steps of providing a metallic bezel having a radiallyinwardly projecting flange defining a crystal opening, providing a crystal of thermoplastic material having a domed lens portion with a rearwardly extending flange formed therearound, forming a radially outwardly opening groove in said crystal flange completely therearound and forming outer surfaces on said flange sloping radially inwardly from said groove with the radially outer edges of said surfaces and the base of said groove of slightly larger radial dimension than the corresponding, radial dimension of said opening, pressing said crystal inwardly through said opening until said bezel flan e. registers with the said groove and with said crystal in stressed condition, and subjecting said bezel and crystal to induction heating to cause said crystal flange to be softened and sealed to said bezel flange and to relieve the stressed condition of said crystal, said induction heating being applied circumferentially exteriorly of the bezel and crystal flanges to facilitate softening of the thermoplastic material only where said flanges contact.
2. The method of assembling a watch crystal and bezel which comprises the steps of providing a metallic bezel having a radially inwardly projecting flange defining a crystal opening, providing a crystal of thermoplastic material having a domed lens portion with a rearwardly extending flange formed therearound, forming a radially outwardly opening groove in said crystal flange completely therearound and forming outer surfaces on said flange sloping radially inwardly from said groove with the radially outer edges of said surfaces and the base of said groove of slightly larger radial dimension than the corresponding radial dimension of said opening, pressing said crystal outwardly through said opening 'until said bezel flange registers with the said groove and with said crystal in stressed condition, and subjecting said bezel and crystal to induction heating to cause said crystal flange to be softened and sealed to said bezel flange and to relieve the stressed condition of said crystal.
3. The method of assembling a watch crystal and bezel which comprises the steps of providing a metallic bezel having a radially inwardly projecting flange defining a crystal opening, providing a crystal of thermoplastic material having a domed lens portion with a rearwardly extending flange formed therearound, forming a radially outwardly opening groove in said crystal flange completely therearound and forming an outer surface sloping radially inwardly from an edge of said groove with the radially outer edge of said surface and the base of said groove of slightly larger radial dimension than the corresponding radial dimension of said opening pressing said crystal and said surface through said opening until said bezel flange registers with the said groove and subjecting said bezel and crystal to heating to cause said crystal flange to be softened and sealed to said bezel flange.
4. The method of assembling a watch crystal and bezel which comprises the steps of providing a bezel having a radially inwardly projecting flange defining a crystal opening, providing a crystal of thermoplastic material having a domed lens portion with a rearwardly extending flange formed therearound, forming a radially outwardly extending shoulder on the outside of said crystal flange and completely therearound and forming an outer surface sloping radially inwardly from said shoulder with the inner edge of said shoulder of greater radial dimension than the corresponding radial dimension of said flange, pressing the sloping surface of said crystal through said opening until said bezel flange seats against said shoulder, and subjecting said bezel and crystal to heating to cause said crystal flange to be softened and sealed to said bezel flange, said heat being applied to said bezel and crystal flanges circumferentially thereof and adjacent thereto to facilitate softening the thermoplastic material of the crystal flange only where said flanges contact.
5. The method of assembling a watch crystal and bezel which comprises the steps of providing a bezel having a crystal opening. providing a crystal of thermo-plastic material having a lens portion and a rearwardly turned flange therearound, said crystal flange in its initially prepared form having an outer portion of slightly larger diametrical measurement than the corresponding diametrical measurement of said crystal opening and a beveled surface sloping radially inwardly from said outer portion, said crystal flange also having a shoulder opening toward said beveled portion, pressing said bevel portion of said flange through said opening to mutually and oppositely stress said bezel and crystal and seat said bezel against said shoulder, and subjecting said bezel and crystal to heat with the greatest intensity at and adjacent the circumference of the bezel opening and crystal flange to cause said crystal flange to be plasticized and deformed only at and closely adjacent the edge of the bezel opening.
6. The method of assembling a watch crystal and bezel which comprises the steps of providing a bezel having a crystal opening, providing a crystal of thermoplastic material having a lens portion and a rearwardly turned flange therearound, said crystal flange in its initial prepared form having an outer portion of slightly larger diametrical measurement than the corresponding diametrical measurement of said crystal opening, pressing said flange through said opening to mutually and oppositely stress said bezel and crystal, and subjecting said bezel and crystal to heat with the greatest intensity at and adjacent the circumference of the bezel opening and crystal flange to cause said crystal flange to be plasticized and deformed only at and closely adjacent the edge of the bezel opening.
OTTO A. STARKE.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,133,780 Ames Mar. 30, 1915 1,216,636 Wehinger Feb. 20, 1917 1,288,309 Wachter Dec. 17, 1918 Number Number 15 100,735 204,004 774,880
Name Date Porter May 1, 1928 Lindhe July 3, 1934 Schmalz Nov. 20, 1934 McArthur July 21, 1936 Hinds Nov. 3, 1936 Ronci Aug. 2, 1938 Dutcher Jan. 9, 1940 Marti Jan. 12, 1943 Spencer Oct. 16, 1945 Falkoff Mar. 16, 1948 FOREIGN PATENTS Country Date Great Britain Nov. 30, 1916 Switzerland July 1, 1939 France Oct. 1, 1934
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709333A (en) * 1952-06-10 1955-05-31 Ingraham E Co Crystal for non-cemented mounting in watch case bezel
US2809399A (en) * 1952-08-30 1957-10-15 Gen Motors Corp Method of uniting metal to plastic
US2878524A (en) * 1954-04-09 1959-03-24 Essex Paper Box Mfg Co Inc Method of constructing a wall and plastic window assembly
US2991899A (en) * 1959-08-12 1961-07-11 Elastic Stop Nut Corp Assemblies of flanged articles and the manufacture thereof
US3022627A (en) * 1956-07-17 1962-02-27 Junghans Geb Ag Table alarm clock
US3355874A (en) * 1965-01-21 1967-12-05 Paratte Charles Arrangement for watertight assembly of a watch-case crystal
US3704584A (en) * 1970-04-24 1972-12-05 Suwa Seikosha Kk Waterproof watch with improved seal construction
US20100315909A1 (en) * 2009-06-10 2010-12-16 Eta Sa Manufacture Horlogere Suisse Process and device for fastening a glass to a bezel

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1133780A (en) * 1915-02-16 1915-03-30 Ingraham Co E Watch-bezel with unbreakable concavo-convex tensional crystal.
GB100735A (en) * 1915-06-23 1916-11-30 Arthur Doutaz Improvements in and relating to the Mounting of Watch-glasses, Compass Glasses and the like.
US1216636A (en) * 1916-09-22 1917-02-20 Waterbury Clock Co Watch-crystal.
US1288309A (en) * 1917-10-17 1918-12-17 Louis E F Wachter Watch crystal and bezel.
US1668336A (en) * 1926-06-24 1928-05-01 New Haven Clock Co Bezel for nonbreakable crystals
US1964886A (en) * 1930-01-24 1934-07-03 Bakelite Corp Watch crystal
US1981334A (en) * 1930-07-17 1934-11-20 Colt S Mfg Co Article of manufacture
FR774880A (en) * 1934-06-23 1934-12-15 Simplified assembly device for unbreakable glass
US2048556A (en) * 1934-01-04 1936-07-21 Gen Electric Glass-to-metal seal
US2059867A (en) * 1932-06-22 1936-11-03 Gen Electric Method of securing a metal member to a nonmetallic tubular member
US2125316A (en) * 1936-02-04 1938-08-02 Bell Telephone Labor Inc Method of forming glass to metal seals
CH204004A (en) * 1938-05-17 1939-04-15 Thommens Uhrenfabriken A G Watch case with tightly fitting glass.
US2186451A (en) * 1937-11-20 1940-01-09 Frank E Dutcher Method of installing unbreakable watch crystals
US2308189A (en) * 1937-12-29 1943-01-12 Marti Fritz Watchcase
US2386820A (en) * 1941-12-22 1945-10-16 Raytheon Mfg Co Method of forming seals
US2437947A (en) * 1944-02-17 1948-03-16 Universal Camera Corp Mounting for and including optical refracting means and method of forming the same

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1133780A (en) * 1915-02-16 1915-03-30 Ingraham Co E Watch-bezel with unbreakable concavo-convex tensional crystal.
GB100735A (en) * 1915-06-23 1916-11-30 Arthur Doutaz Improvements in and relating to the Mounting of Watch-glasses, Compass Glasses and the like.
US1216636A (en) * 1916-09-22 1917-02-20 Waterbury Clock Co Watch-crystal.
US1288309A (en) * 1917-10-17 1918-12-17 Louis E F Wachter Watch crystal and bezel.
US1668336A (en) * 1926-06-24 1928-05-01 New Haven Clock Co Bezel for nonbreakable crystals
US1964886A (en) * 1930-01-24 1934-07-03 Bakelite Corp Watch crystal
US1981334A (en) * 1930-07-17 1934-11-20 Colt S Mfg Co Article of manufacture
US2059867A (en) * 1932-06-22 1936-11-03 Gen Electric Method of securing a metal member to a nonmetallic tubular member
US2048556A (en) * 1934-01-04 1936-07-21 Gen Electric Glass-to-metal seal
FR774880A (en) * 1934-06-23 1934-12-15 Simplified assembly device for unbreakable glass
US2125316A (en) * 1936-02-04 1938-08-02 Bell Telephone Labor Inc Method of forming glass to metal seals
US2186451A (en) * 1937-11-20 1940-01-09 Frank E Dutcher Method of installing unbreakable watch crystals
US2308189A (en) * 1937-12-29 1943-01-12 Marti Fritz Watchcase
CH204004A (en) * 1938-05-17 1939-04-15 Thommens Uhrenfabriken A G Watch case with tightly fitting glass.
US2386820A (en) * 1941-12-22 1945-10-16 Raytheon Mfg Co Method of forming seals
US2437947A (en) * 1944-02-17 1948-03-16 Universal Camera Corp Mounting for and including optical refracting means and method of forming the same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709333A (en) * 1952-06-10 1955-05-31 Ingraham E Co Crystal for non-cemented mounting in watch case bezel
US2809399A (en) * 1952-08-30 1957-10-15 Gen Motors Corp Method of uniting metal to plastic
US2878524A (en) * 1954-04-09 1959-03-24 Essex Paper Box Mfg Co Inc Method of constructing a wall and plastic window assembly
US3022627A (en) * 1956-07-17 1962-02-27 Junghans Geb Ag Table alarm clock
US2991899A (en) * 1959-08-12 1961-07-11 Elastic Stop Nut Corp Assemblies of flanged articles and the manufacture thereof
US3355874A (en) * 1965-01-21 1967-12-05 Paratte Charles Arrangement for watertight assembly of a watch-case crystal
US3704584A (en) * 1970-04-24 1972-12-05 Suwa Seikosha Kk Waterproof watch with improved seal construction
US20100315909A1 (en) * 2009-06-10 2010-12-16 Eta Sa Manufacture Horlogere Suisse Process and device for fastening a glass to a bezel
US8764283B2 (en) * 2009-06-10 2014-07-01 Eta Sa Manufacture Horlogère Suisse Process and device for fastening a glass to a bezel

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