CH230220A - Waterproof watch box. - Google Patents

Description

  

  Waterproof watch box. In the main patent is described a waterproof watch case, characterized by a false bottom pressed by a spring against a bearing provided inside the middle part and lined with a sealing package made of slightly compressible material.



  The present invention has: for object a waterproof watch case according to the claim of the main patent,: characterized in that the spring acting on the false bottom is supported on a bottom connected to the caseband.



  The appended drawing shows, by way of example, an embodiment of the watch case forming the subject of the invention.



  This is a round watch on the caseband-bezel 10- of which a crystal 11 is frozen to die. Inside the case 10 is forced a circle 20 whose lower end, externally threaded, comprises an internal peripheral bearing surface 12, on which is disposed a packet 13, consisting of a ring of slightly compressible material, for example of a material known under the trade name of "Plexite". A rigid disc 14, forming a false bottom, rests on the package 13 against which it is pressed uniformly by a spring 15:

  consisting of a flat metal ring in which are cut symmetrically and at equal distances from each other six tabs 15 'slightly raised perpendicular to the surface of the false bottom. The spring 15 is supported, on the other hand, on a base 16 screwed onto the thread: of the circle 20.

   To facilitate screwing .du bottom, it is provided with: peripheral notches (not shown) or facets allowing a key to grip it.



  It goes without saying that the back could also be screwed directly onto a one-piece caseband or inside it and: that it could be perforated, the tightness being ensured anyway by the false back 14 and the package 13 under the action of the spring 15.



       On the other hand, if one: wishes to obtain an additional guarantee of tightness, one can insert a second package 21 between the back and the shoulder of the middle part on which its threaded edge comes to rest when it is screwed in fully. As for the circle 20, it can be made integral with the middle part by pressing, by hard sou or by any other means.

 

Claims (1)

CLAIM Watertight watch case according to the claim of the main patent, characterized in that the spring acting on the false bottom rests on a bottom connected to the middle part. <B> SUB-CLAIMS: </B> 1. Waterproof watch case according to claim, characterized in that its back is screwed onto a circle integral with the middle part. ?. Watertight watch case according to the claim, characterized in that it comprises a second package between the back and the case.