发明名称 |
Waterproof watch and method for making |
摘要 |
A waterproof watch having a case and a base which are sealed in a water tight manner without the use of screw threads, is provided. The watch base is composed of a memory form alloy which may or may not be reversible. The watch base is deformed while in its Martensitic state and loosely fit adjacent a sealing portion of the case. The base is then permitted to rise above the Martensit/Austenit conversion temperature into its Austenitic state so that it returns to its undeformed shape and engages the sealing portion of the case in a water tight pressure fitting manner. The conversion temperature should be -20 DEG C. or below. A tubular conduit for the winding stem may also be composed of memory form alloy for sealing engagement with the case.
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申请公布号 |
US4293942(A) |
申请公布日期 |
1981.10.06 |
申请号 |
US19790098684 |
申请日期 |
1979.11.29 |
申请人 |
BBC BROWN, BOVERI & COMPANY, LIMITED |
发明人 |
BAUMGARTNER, HANS |
分类号 |
G04B37/08;C22F1/00;G04B37/11;(IPC1-7):G04B37/00;B23P13/00;B23P11/02 |
主分类号 |
G04B37/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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