Appeal No. 1996-3262
Application No. 08/141,632
The invention relates generally to a diamond film (figure 1,
numeral 13) with a heating element (figure 1, numeral 11) and a
thermistor (figure 1, numeral 12) thereon for measuring fluid
properties (specification, page 12, lines 17-32 through page 13,
lines 1-8). The diamond thin film acts as a base of the
instrument and is in contact with the fluid (figure 1, numeral
16). Heat is carried away by the fluid through the bottom
surface of the diamond, which is opposite to the surface of the
diamond film on which the thermistor layer and the heating
element are formed (specification, page 12, lines 30-32 through
page 13, lines 1-3).
In an embodiment of the invention the thermistor and heating
element are mainly thermally coupled by the diamond film
(specification, page 19, lines 28-32).
In a further embodiment a heat generator produces pulses of
heat and a thermistor measures the temperature variation of the
diamond film (specification, page 74, lines 10-18).
Independent claims 1 and 16 are reproduced as follows:
1. An electric device for monitoring a fluid comprising:
a diamond film having a first surface and a second
surface on an opposite side of said first surface; and
a resistor provided on said first surface of said
diamond film and measuring a temperature of said diamond film;
2
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