Pressure gage

Claim 1

A FLUID PRESSURE GAGE COMPRISING, A FRAME HAVING A DIAL FACE SECURED THERETO, A GAGE POINTER MOUNTED ON SAID FRAME AND ADAPTED TO VISUALLY EXHIBIT A READING ON SAID DIAL FACE, A ROD AXIALLY RECIPROCALLY MOVABLE WITH RESPECT TO SAID FRAME, MEANS OPERATIVELY CONNECTING SAID POINTER AND ROD FOR TRANSLATING THE AXIAL POSITION OF SAID ROD WITH RESPECT TO SAID FRAME INTO A DIAL READING, A PISTON SECURED TO SAID ROD AND ADAPTED TO MOVE THEREWITH, MEANS ADAPTED TO DISPLACE SAID PISTON IN RESPONSE TO A PRESSURE SIGNAL FOR MOVING SAID ROD, A COLLAR SPACED AXIALLY OF SAID PISTON, MEANS FOR AXIALLY ADJUSTABLY SECURING SAID COLLAR WITH RESPECT TO SAID FRAME WITHOUT ROTATION OF SAID COLLAR, SAID COLLAR HAVING AN AXIAL BORE THERETHROUGH FOR SLIDABLY RECEIVING SAID ROD, A HELICAL COMPRESSION SPRING ACTING ON SAID ROD, SAID SPRING HAVING A PLURALITY OF ACTIVE WIRE COILS SURROUNDING SAID ROD AND HAVING ONE END THEREOF CONTACTING SAID PISTON, A HELICAL GROOVE ON SAID COLLAR AND LEADING AXIALLY OF SAID ROD, SAID GROOVE ADJUSTABLY RECEIVING SAID COILS AT THE OTHER END OF SAID SPRING IN RESPONSE TO RELATIVE ROTATIONS BETWEEN SAID COLLAR AND SAID SPRING TO CHANGE THE NUMBER OF ACTIVE WIRE COILS EXTENDING BETWEEN SAID COLLAR AND SAID PISTON, SAID MEANS FOR AXIALLY ADJUSTABLY SECURING SAID COLLAR PERMITTING VARIATIONS IN THE COMPRESSION OF SAID SPRING WITHOUT ALTERATION OF THE NUMBER OF ACTIVE WIRE COILS ON SAID SPRING, WHEREBY SAID GAGE IS ADJUSTABLE TO PROVIDE A VARIATION IN POINTER DEFLECTION RATE AS WELL AS LOAD RANGE.