Mensuration device with electronic detection for remote reading

Claim 1

IN MENSURATION APPARATUS OF DIGITAL TYPE, INDICATOR MEANS ROTATABLE TO REGISTER VALUES OF MENSURATION, A PLURALITY OF SEPARATE AND DISTINCT TRANSFORMER UNITS EACH HAVING A CORE OF ALTERABLE PERMEABLILITY AND DISPOSED AT SPACED INTERVALS AND DEFINING A CIRCULAR PATHWAY COAXIAL WITH SAID INDICATOR MEANS, EACH OF SAID TRANSFORMER UNITS CORRESPONDING TO A PREDETERMINED VALUE OF MENSURATION ON SAID INDICATOR, MEANS, A PERMANENT MAGNET LYING CLOSELY ADJACENT SAID PATHWAY AND HAVING A SURFACE ADAPTED TO OVERLIE ANY ONE OF SAID TRANSFORMERS AND ONLY ONE AT A TIME, MEANS MECHANICALLY COUPLED TO SAID INDICATOR MEANS FOR CAUSING RELATIVE ROTATION BETWEEN SAID PLURALITY OF TRANSFORMER UNITS AND SAID PERMANENT MAGNET ALONG SAID PRESCRIBED CIRCULAR PATHWAY, MEANS SUPPLYING ELECTRICAL INPUT PULSES TO THE PRIMARIES OF SAID TRANSFORMERS, AND MEANS DETECTING THE DIFFERENCE IN CHARACTER BETWEEN THE OUTPUT PULSE OF THE TRANSFORMER OVER WHICH THE PERMANENT MAGNET LIES AND THAT OF THE REMAINING TRANSFORMERS WHEREBY TO READ THE VALUE OF MENSURATION CORRESPONDING THERETO.