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Instruments \ Seismic \ Miscellaneous \
Name: |
Chronometer |
Date: |
1965 |
Item Number: |
87.21.11 |
Donor: |
Lamont-Doherty |
Type: |
Tuning-fork controlled |
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Manufacturer:
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Westrex Corporation, New York |
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Description:
The fork chronometer was built by the Times Facsimile about 1955. They built
it for facsimile recording over telephone lines
and needed an accurate time device. They developed the fork
chronometer into a time piece that was good to one part in a million, nearly
as good as
the crystal chronometer.
It was then adapted for several
reasons; one of which is that it was smaller; secondly, it had a lot more power
in the synchronous motor so getting it to run and keep it runing was a much
simpler process. It used transistors so it had no tubes to burn out, etc. ,
although we had very modest problems with the crystal chronometer we had less
problems with the fork chronometer. In the last years of 1957-59 we used the
fork chronometer with the VM Pendulum
Apparatus.
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