Appeal No. 1997-1892
Application 08/209,638
characteristics of the quartz oscillator. Other embodiments
are also disclosed. The chemical measuring instrument of the
invention permits the simultaneous measurement of a change in
the resonant frequency of the quartz oscillator and the
conductivity of a substance to be measured from the electrical
current flowing across the surfaces of the electrodes. The
invention is further illustrated by the following claim.
Representative claim 4 is reproduced as follows:
4. A chemical measuring instrument for detecting a
physicochemical change in a substance, the chemical measuring
instrument comprising:
a quartz oscillator having a first electrode comprising
at least two separate electrode portions and a second
electrode;
piezoelectric characteristic measuring means having an
output signal line connected to capacitors connected in
parallel to the separate electrode portions of the first
electrode, and an input signal line connected to the second
electrode;
voltage application means for applying a voltage between
the separate electrode portions; and
electrical current measuring means for measuring an
electrical current flowing between the separate electrode
-3-
Page: Previous 1 2 3 4 5 6 7 8 9 Next
Last modified: November 3, 2007