Timepiece external part and method of manufacturing the part

Details Timepiece external part and method of manufacturing the part Timepiece external part and method of manufacturing the part

2005-08-30

2005-08-30

Miska, Vit W. (Department: 2841)

Horology: time measuring systems or devices

Cases

Of particular material

C368S281000, C368S285000, C368S319000, C148S528000, C148S559000, C148S668000, C228S175000, C228S262700, C228S262900

Reexamination Certificate

active

06935774

ABSTRACT:
A wristwatch case (11) and a method of manufacturing the case, the wristwatch case comprising a wristwatch case body (1) made of titanium or stainless steel and a crown pipe (3) fixed to each other, wherein a stem hole (2) corresponding to the crown pipe (3) is formed in the wristwatch case body (1), a small diameter part is formed in the crown pipe (3), and a small diameter part corresponding to the a small diameter part of the crown pipe is formed in the stem hole (2), the method comprising the step of fitting the crown pipe (3) into the stem hole (2) in the wristwatch case body (1) to form a solid phase diffusion joining part at a portion where the small diameter parts thereof are fitted closely to each other, and to form a brazed connection part at a portion other than that where the small diameter parts are fitted closely to each other, whereby a watch external part having excellent corrosion resistance and waterproof and a large number of design variations can be provided.

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