Re: A Genial Invention: Vaccum Chronometer


John S. wrote:
> >
> > Indeed. The inventor and designer of the vacuum watches was a salesman
> > for Glycine until January 1st, 1966, where at the abolition of the
> > horological statute, he could finally establish his own company: Vacuum
> > Corporation Inc., in Biel-Bienne, and later on start Century Time Gems
> > Ltd, manufacturing sapphire watches.
>
> That is interesting. I had attempted to research the brevet referenced
> on the case back, but found only limited information. Was the vacuum
> case designed to provide water resistance? It may sound like a silly
> question, but intuitively it would seem a vacuum could pull moisture
> into the case.

Please consider that the atmosphere (air) is the vector of all moisture
and impurities, which may impair the good working of a movement. Air
also propagates temperature changes very quickly. If you pull 85-85% of
the air out of the case, before closing it hermetically and keep it
sealed, you have eliminated all the potential problems, which could
impair the good working of the movement. The movement has of course to
be minutely regulated backwards, in order to compensate for the lesser
friction.

.

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