Appeal No. 1999-2241
Application No. 08/714,914
composition and concentration confined within
said substantially liquid- and vapor-tight
portion of the central cavity of the primary
container body and in physical contact with
the fluoride-sensing crystal;
(G) a first reference electrode enclosed within
said substantially liquid- and vapor-tight
portion of the central cavity of the primary
container body, said first reference
electrode including a metallic electrical
conductor that is in physical contact with
the first liquid ionic solution but is not in
physical contact with the fluoride-sensing
crystal; and
(H) an electrically conducting lead component
that is in physical contact with both the
metallic electrical conductor part of the
first reference electrode and a point outside
said substantially liquid- and vapor-tight
portion of the central cavity of the primary
container body but is not in physical contact
with the fluoride-sensing crystal or with the
first ionic solution, wherein: the central
cavity of the primary container body has a
central portion that is cylindrical; a first
end portion of the central cavity of the
primary container body has a shape of a
cylinder that is concentric with but has a
larger diameter than the cylindrical central
portion of the central cavity, so that the
primary container body in said first end
portion has a bounding wall surface that
consists of two concentric cylinders joined
by an annular disk with a circular center
hole, the disk and center hole both being
concentric with said concentric cylinders;
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