Appeal No. 1998-1090
Application No. 08/534,965
assembly having a movable pressure responsive member which
operates a cantilevered switch contact blade spring in
response to pressure changes in a pressure chamber. An
adjustment screw located at adjustable positions at the free
end of the blade spring operates to change the position of the
free end of the blade spring to vary the bias on the pressure
responsive member to thereby change the pressure level at
which the switch operates.
Claim 6 is illustrative of the invention and reads as
follows:
6. A pressure switch assembly comprising:
(a) housing means including pressure responsive
means defining a pressure sensing chamber
having a fluid pressure signal port, said
pressure responsive means moveable in response
to changes in pressure in said cavity;
(b) a blade spring anchored at one end on said
housing a second end free and contacting
said pressure responsive means at a point
intermediate said ends and operative for
biasing said pressure responsive means;
(c) adjustment means disposed for contacting said
blade spring intermediate said second end
and said pressure responsive member contact
point; said adjustment means operative to vary
said biasing on said pressure responsive
member; and,
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