Portable apparatus for measuring conductivity of fluids

Claim 1

A MANUALLY PORTABLE DEVICE FOR TESTING THE CONDUCTIVITY OF FLUID COMPRISING AN ELONGATED STRIP OF MATERIAL FORMING A SUPPORT FRAME HAVING AN UPSTANDING FLANGE AT ONE END, A METER HAVING AN INDICATING DIAL SUPPORTED AT THE FLANGE REMOTER END OF SAID STRIP, AN ELONGATED STEM FORMING A PROBE SECURED, AT ONE END, ON SAID FLANGE AND EXTENDING OUTWARDLY OF THE METER REMOTE END OF THE FRAME, SAID PROBE EMBODYING A PAIR OF SPACED, RELATIVELY INSULATED ELECTRODES SECURED ON SAID STEM, AT ITS FLANGE REMOTE END, IN POSITION FOR IMMERSION IN A FLUID TO BE TESTED, MEANS FORMING A MEASURING CIRCUIT INTERCONNECTING SAID ELECTRODES WITH SAID METER IN A SERIES CIRCUIT INCLUDING A ROTARY REVERSING SWITCH, A MANUALLY OPERABLE CIRCUIT CONTROL SWITCH AND TERMINAL CLIPS FOR DETACHABLY SUPPORTING A DIRECT CURRENT ELECTRIC BATTERY, ON SAID FRAME AND CONNECTING IT IN SAID MEASURING CIRCUIT, SAID REVERSING AND CONTROL SWITCHES AND SAID TERMINAL CLIPS BEING MOUNTED ON SAID FRAME, BETWEEN THE METER AND SAID PROBE CARRYING FLANGE, AND ELECTRIC MOTOR MOUNTED ON THE SUPPORT FRAME ADJACENT AND DRIVINGLY CONNECTED WITH SAID REVERSING SWITCH, MEANS FORMING A MOTOR ENERGIZING CIRCUIT CONNECTED SAID MOTOR AND COMPRISING A MANUALLY OPERABLE MOTOR CONTROL SWITCH AND TERMINAL CONTACTS FOR DETACHABLY SUPPORTING A DIRECT CURRENT ELECTRIC BATTERY ON SAID FRAME AND FOR CONNECTING IT IN SAID ENERGIZING CIRCUIT, SAID CIRCUIT AND MOTOR CONTROL SWITCHES BEING MECHANICALLY INTERCONNECTED FOR OPERATION IN UNISON TO ACTIVATE AND TO DISABLE THE MEASURING AND ENERGIZING CIRCUITS.