Title: Method and apparatus for preventing waterdrops inside a sealed instrument

Abstract: An arrangement for preventing the production of waterdrops inside a wrist watch, comprising a hollow sealed container communicating with a suction pipe having an on-off valve for a suction pump on one side and an air feed section having an on-off valve, a desiccator and a filtering material on the other side. A watch is placed in the container with the crystal of the watch loosened. Air in the container is withdrawn by the pump to decrease the pressure therein, whereupon dry air, which has been passed through a desiccator and filtering material, is suctioned into the sealed container and enters the wrist watch therein, so that dry air is thus enclosed in the watch.

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Other info:

Inventors: Chiba, Mitsumasa

Application Number: 505320
Filing Date: 1974-09-12
Publication_date: 1976-01-20
Assignee:
Primary Class(es): 34/380 34/92, 34/104, 968/306, 968/684, 968/DIG1
Other Classes:
US Patent Ref:

2854815	Oct, 1958	Piquerez	58/1.
3088219	May, 1963	Kraus	34/15.
3262212	Jul, 1966	De Buhr	34/15.
3451189	Jun, 1969	Taggart	34/92.

Other Refs:
Primary Examiner: Camby, John J.
Assistant Examiner:
Attorney: Oujevolk; George B.