Pressure responsive resetting controller

Claim 1

IN COMBINATION: A DIAPHRAGM; MEANS FORMING A VARIABLE FLUID PRESSURE RESPONSIVE CHAMBER ON ONE SIDE OF SAID DIAPHRAGM; FLUID FLOW MEANS CONNECTED WITH SAID VARIABLE FLUID PRESSURE RESPONSIVE CHAMBER AND CONNECTABLE WITH A VARIABLE FLUID PRESSURE PRODUCING MEANS; A CONTROLLER; CONNECTING MEANS CONNECTING SAID DIAPHRAGM AND SAID CONTROLLER TO CAUSE SAID CONTROLLER TO BE CHANGED TO A SET CONDITION, WHEN SAID VARIABLE FLUID PRESSURE ON ONE SIDE OF SAID DIAPHRAGM IS SUBSTSTANTIALLY AT A GENERALLY LOW LIMIT, AND AN ACTUATED CONDITION WHEN SAID VARIABLE FLUID PRESSURE ON ONE SIDE OF SAID DIAPHRAGM IS AT ANY ONE OF A PLURALITY OF SELECTED UPPER PRESSURE LIMITS; AN ADJUSTING CAM MEMBER ROTATABLE ABOUT AN AXIS AND HAVING A CURVED UPPER PRESSURE LIMIT SELECTING ADJUSTABLE SURFACE ECCENTRIC TO SAID AXIS ADJUSTABLE BY ROTATION OF SIAD CAM MEMBER, SURFACE OPERATED MEANS OPERATED BY SAID ADJUSTING SURFACE TO CAUSE SAID CONNECTING MEANS TO CAUSE SAID CONTROLLER TO BE ACTUATED TO SAID ACTUATED CONDITION IN RESPONSE TO SAID ANY ONE OF A PLURALITY OF SELECTED UPPER PRESSURE LIMITS, SAID CAM MEMBER HAVING A RESETTING ADJUSTING SURFACE CONNECTED TO ONE END OF SAID SELECTING ADJUSTING SURFACE MOVABLE TO CAUSE SAID SURFACE OPERATED MEANS TO CAUSE SAID CONNECTING MEANS TO CAUSE SAID CONTROLLER TO BE RESET TO SAID SET CONDITION WHILE SAID FLUID PRESSURE CHAMBER IS AT A HIGHER PRESSURE THAN SAID GENERALLY LOW LIMIT SAID CAM MEMBER INCLUDING HOLDING MEANS, AND A HOLDING SPRING ENGAGING SAID HOLDING MEANS TO HOLD SAID CAM MEMBERS IN ADJUSTED POSITION, AND IN WHICH SAID SELECTING ADJUSTING SURFACE AND SAID RESETING ADJUSTING SURFACE FORM ONE EDGE OF A CURVED CLOSED SLOT IN SAID ADJUSTING CAM MEMBER.