Liquid-moisture indicator

Claim 1

A LIQUID-MOISTURE INDICATOR COMPRISING: A BODY HAVING A THROUGH PASSAGE FOR FLUID FLOW INCLUDING INLET AND OUTLET PORTS, A FIRST APERTURE IN ITS LATERAL WALL IN COMMUNICATION WITH SAID PASSGE, AND A SCREWTHREADED SECOND APERTURE IN ITS LATERAL WALL IN A POSITION DIAMETRICALLY OPPOSITE TO SAID FIRST APERTURE; COUPLING MEANS TO CONNECT THE INLET AND OUTLET PORTS OF THE BODY IN A FLUID CONDUCTING PIPE LINE; A TRANSPARENT WINDOW ELEMENT MOUNTED IN CLOSING RELATION TO SAID FIRST APERTURE OF THE BODY; A DISK-LIKE MOISTURE INDICATING ELEMENT ADAPTED TO BE HELD IN FLAT CONTACT WITH THE INNER FACE OF THE WINDOW ELEMENT; AND A RETAINER ASSEMBLY FOR SAID MOISTURE INDICATING ELEMENT INCLUDING: A LATERALLY EXTENDING TUBULAR PRESSER MEMBER HAVING ITS OUTER END ARRANGED TO ENGAGE THE MARGINAL EDGE PORTION OF THE MOISTURE INDICATING ELEMENT AND ITS INNER END IN COMMUNICATION WITH THE FLOW PASSAGE OF SAID BODY IN A MANNER TO EXPOSE A CENTRAL AREA OF SAID ELEMENT OF MAXIMUM EXPANSE TO LIQUID FLOWING THROUGH THE BODY PASSAGE, SAID PRESSER MEMBER BEING REDUCED IN OUTSIDE DIAMETER AT THE INNER END THEREOF OF PROVIDE AN ANNULAR SHOULDER; A SCREW PLUG IN THREADED ENGAGEMENT WITH SAID SECOND BODY APERTURE FOR AXIAL ADJUSTMENT WITH RESPECT TO THE TUBULAR PRESSURE MEMBER; AND A COMPRESSION COIL SPRING INTERPOSED BETWEEN THE SHOULDER OF SAID PRESSER MEMBER AND THE INNER END OF SAID SCREW PLUG.