F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/14
F16K 31/00 (2006.01) F15B 13/043 (2006.01)
Patent
CA 1092585
ABSTRACT OF THE DISCLOSURE The invention provides an electric circuit for governing a fluid flow governing valve including a housing enclosing a movable main valve member, a conduit for supplying pressure fluid to move said main valve member, a control valve in said conduit and having a valve body for controlling the flow of pressure fluid acting upon said main valve member. The circuit comprises: an electric resistance wire having heat expansion properties and connected to said control valve body, so its thermal movements will determine the position thereof; a source for supplying electric current to said resistance wire at an intensity whch would be higher than acceptable therefor during an extended exposure; a potentiometer for monitoring the supply of current from the source and including a first manually adjustable resistor to indicate the desired input, a second adjustable resistor operable in response to the position of said main valve member and a comparator for evaluating possible differences between the resistance values at said first and second resistors; and a device governed by the thermal movements of the wire for causing an intermittent flow of the current allowed to pass on by said potentiometer means.
311924
Joelson Karl E.
Marks & Clerk
LandOfFree
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