Rotor for a shapemeter
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United States of America Patent
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-
Nov 16, 1999
Grant Date -
N/A
app pub date -
May 19, 1998
filing date -
Oct 24, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotor for a shapemeter is shown in the figure and comprises an inner annulus (6) connected to and spaced from a coaxial outer annulus (7) by means of rubber o-rings (10). The air gap formed between the annuli (6, 7) and the rubber o-rings (10) provide a thermal barrier which greatly alleviates heat transfer between the inner and outer annuli (6, 7) and allows the annuli to be made of materials with different coefficients of thermal expansion. In consequence the inertia of the rotor can be minimised and the thermal stability of the rotor enhanced so that shapemeters using the rotor have improved sensitivity.
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