Travelx-responsive s sensingx d device, particularly for control of fabricating machinery

Claim 1

A TRAVEL-RESPONSIVE SENSING DEVICE, PARTICULARLY FOR CONTROL OF FABRICATING MACHINERY, COMPRISING A RASTER MEMBER HAVING A SOFT-MAGNETIC LINE RASTER INCLUDING SPACED RASTER LINES AND A GROUP OF SENSOR MEMBERS HAVING NORMALLY FIXED POSITIONS RELATIVE TO EACH OTHER, SAID RASTER MEMBER AND SAID GROUP BEING MOVABLE ONE RELATIVE TO THE OTHER, EACH OF SAID SENSOR MEMBERS HAVING A MAGNET WITH A MAGNETIC CIRCUIT FORMING A SENSING GAP EQUAL IN WIDTH TO THE SPACING FROM ONE RASTER LINE TO THE NEXT AND BEING CLOSE TO SAID RASTER TO BE MAGNETICALLY BRIDGED BY A LINE OF SAID RASTER, A HALL GENERATOR HAVING A HALL PLATE MOUNTED IN THE FLUX PATH OF EACH OF SAID MAGNETIC CIRCUITS AND HAVING AN OUTPUT VOLTAGE DEPENDENT UPON THE DEGREE OF BRIDGING OF SAID SENSING GAP BY A LINE OF SAID RASTER, AND SAID SENSING MEMBERS OF SAID GROUP BEING SPACED FROM EACH OTHER IN THE TRAVEL DIRECTION A DETERMINED DISTANCE INCLUDING A FRACTION OF THE SPACE BETWEEN THE RASTER LINE FOR INCREASING THE RESOLVING CAPACITY OF THE SENSING DEVICE.