Waterproof watch and method for making

Details Waterproof watch and method for making Waterproof watch and method for making

1979-11-29

1981-10-06

Miska, Vit W.

Horology: time measuring systems or devices

Cases

Of particular material

29179, 29447, G04B 3700, B23P 1300, B23P 1102

Patent

active

042939429

ABSTRACT:
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.degree. C. or below. A tubular conduit for the winding stem may also be composed of memory form alloy for sealing engagement with the case.

REFERENCES:
patent: 1980156 (1934-11-01), Emrick
patent: 1981334 (1934-11-01), Schmaltz
patent: 3690002 (1972-09-01), Kasai et al.
patent: 3841848 (1974-10-01), Kasai et al.
patent: 3911690 (1975-10-01), Hofer
patent: 4104867 (1978-08-01), Worsham
patent: 4147568 (1979-04-01), Marechal
patent: 4155782 (1979-05-01), Shimotori et al.
patent: 4170104 (1979-10-01), Yamagata

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