Consistency responsive device

Claim 1

IN A SLURRY CONSISTENCY RESPONSIVE DEVICE, A CONDUIT THROUGH WHICH SLURRY FLOWS, A PROBE ELEMENT EXTENDING INTO SAID CONDUIT SO AS TO HAVE AN EXTERNAL FORCE APPLIED TO IT BY THE SLURRY FLOWING THROUGH THE CONDUIT, A DIAPHRAGM, MEANS MOUNTING SAID DIAPHRAGM SO AS TO PROVIDE FIRST AND SECOND CAVITIES ON OPPOSITE SIDES OF THE DIAPHRAGM, A PILOT VALVE CONNECTABLE TO A SOURCE OF FLUID UNDER PRESSURE FOR APPLYING FLUID PRESSURE TO SAID FIRST CAVITY, SAID PROBE ELEMENT BEING CONNECTED TO SAID DIAPHRAGM AND BEING IN OPERATIVE RELATIONSHIP WITH SAID VALVE FOR OPENING THE VALVE DUE TO SAID FORCE, A RESTRICTED PASSAGEWAY CONNECTING SAID SECOND CAVITY WITH SAID CONDUIT, MEANS PROVIDING A RESTRICTED PASSAGEWAY CONNECTING SAID FIRST CAVITY TO SAID SECOND CAVITY FOR CAUSING THE DIFFERENTIAL OF FLUID PRESSURE WITHIN SAID TWO CAVITIES AND APPLIED TO THE TWO SIDES OF THE DIAPHRAGM TO INCREASE IN ACCORDANCE WITH THE EXTERNAL FORCE APPLIED TO SAID PROBE ELEMENT AND TO THEREBY APPLY A FORCE ON SAID DIAPHRAGM AND ON SAID ELEMENT OPPOSING SAID EXTERNAL FORCE, AND FLUID PRESSURE RESPONSIVE MEANS CONNECTED TO SAID TWO CAVITIES SO AS TO BE RESPONSIVE TO THE CHANGES OF PRESSURE DIFFERENTIAL ON THE TWO SIDES OF THE DIAPHRAGM AND THEREBY TO CHANGES IN THE EXTERNAL FORCE APPLIED ON SAID PROBE ELEMENT.