Appeal No. 2004-1137
Application No. 09/734506
thermostat normally operates over a small temperature range from
slightly above the set point temperature (e.g., 2 degrees above)
to slightly below the set point temperature (e.g., 1 degree
below). That is, if the thermostat in Gillard were set to
maintain a temperature of 35º F in the sample chamber (13), then
it would actually allow an initial internal mean temperature of
approximately 37º F to exist before turning on the refrigeration
unit (43) to cool the sample chamber, and then continue to allow
cooling of the sample chamber until a lower internal temperature
of approximately 34º F is reached before shutting the
refrigeration unit off. Whereupon the sample chamber would be
allowed to again rise in temperature to an initial internal mean
temperature of approximately 37º F before the refrigeration unit
(43) is again turned on to cool the sample chamber to the set
point temperature. This type of operation is generally explained
at page 3, lines 39-75, of Gillard.
Moreover, if a different set point temperature were desired
in sample chamber (13), e.g., 37º F, then that would result in an
adjustment of the initial internal mean temperature in the sample
chamber to a value of approximately 39º F, instead of the earlier
value of approximately 37º F, before the refrigeration unit is
2121
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