US1288309A - Watch crystal and bezel. - Google Patents

Description

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MATCH CRYSTAL AND BEZEL.

Original application filed ctober 17, 1917, Serial No. 197,00. Divided and this Seria1E-o.226,982.

To all whom, 'it may concern.'

Be it known that l. Loris lil. F. lixcirrnn, a citizen ot' the United States, residing in the city, county, and .State ot' New York, have invented certain new and uset'ul lmprovements in latch Crystals aud Bezels, ot which the following' is a specification` reference beinev had to the accompanying -drawing,illustrative ot one particular embodiment of my invention, thisl application being a division of my application, Serial No. 197,006. tiled October ll. 191i".

This invention relates to crystals as the term broadly applies, that is a transparent protecting cover for the face ot a watch. clock or other article where the dial must be ,visible and at the same time protected. ln particular, instead of the use of glass for crystals. Celluloid and other transparent materials are used. and in the case otl eelluloid the physical characteristics ot' the material necessitate new methods ot attachment.

Among the objects ot' thisl invention are to provide better means oiZ overcoming lthe difliculties in attaching' celluloid. or like nuiterial. and to secure them in a wa}v which assures under all conditionsl a light joint between the transparent disk and the attachf ing rim, under the various conditions to which the material is -subjected. ,l aecom plish this by makingr a pliable, resilient and transparent tace cover. the form and construction oll which are such that any shrinkage that might take place will not produce a looseningin the joint,

ln the particular species; ot crystal and attaching rim or bezel, to which this divi, sional application is addressed, l have illus` trated in the acconipanying.;` drawiincr one form, in which- The crystal 0, as shown in fragmentary view, has a bend near the edge which is reentrant and again turns outward as at o, thereby terminer a recess below the surface of the inner side of the crystal Oiwhich engages a projection or rib 0 on the bezel Q. As shown, the surface of the crystal, where it engages the bezel, has tlic circumferential projection 0 so that it forms an outer portion of slightly 2greater diameter than the annular rcntrant surface portion below it` which merges into the brim o, and which engages the underside oi?l the bezel.

These results are atta-ined by the features as shown clearly in the drawings, namely,

Specification of Letters 'atent. @iigfl EP3@ ji' the brim o is of considerably greater diam eter 'than the minimuml diameter of the bezel opening. and likewise 'the crystal at Of is normally ot' greater diameter than the minimum diameter oli' the bezel, so that when the crystal is inserted in the bezel the crown portion oi the crystal contacts snliicient-ly to permit the insertion oi the crystal crown through the bezel opening, until the brim` engages the underside of the bezel. Yvhen in position the normal shape of the crystal, causes suitable pressure of engagement with the bezel after the release, for the necessaijv tight lit of the cjf'stal between the bezel, crown and the brim portion.

lt will be seen that the crystal may be inserted from ythe inside to engage the bezel, and when snapped in position will be held against inward displacement, while the ed e ot' the crystal turning outward at 0 will prevent the outward displacement of the crystal in spite of any substantial contraction or shrinkage. f

ln watches where the bezel veryv low and it requires a very heavy surface crown on the crystal, the reentrant and brim p0rtion would be ot much thinner material to lit such a low bezel.

lt' will be seen that the construction of bezel and crystal is such as may be readily made in the course ot manufacture, with tools and methods used by those familiar with the art. lrariations in thickness and dimensions ol material become important in the new art ot celluloid or like material for these articles. but variations in dimensions and i'orm and sizes may be made without departingtroni in v invention.

Relatively thin material mayY be used for the ifacc or transparent closure, whereby the desired elasticity and spring); 'for insertion and otherwise, are provided and proper transpare1u:y in such materials as cellnloitl is assured. while ,various other advantageous features necessa'j-,f for commercial success are accommodated.

What I claim and desire to 'secure by Letters Patent is: l

l. ln combination in watch or like article, a bezel, a crystal having its main surface merging into i beveled periphery, projectincT ridge extending from said beveled portion. and engaging the upper part or the rim ol' the bezel, and haring in conjunction therewith a liange .brim constituting the lio i im mmm' 2. lin cominutiuzi in waici ci' like ai' a. d

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