Extended radiation micrometer gage

Claim 1

AN EXTENDED RANGE, TRANSVERSE DIMENSIONAL GAGE OPERATING ON OPTICAL RADIATIONS COMPRISING IN COMBINATION AND IN OPTICAL ALIGNMENT, (A) TWO REFLECTING MEANS SPACED ON A LINE IN A PLANE PARALLEL TO THE OBJECT TO BE GAGED, THE LINE BEING TRANSVERSE THEREOF AND THE SPACING BEING SUCH THAT THE REFLECTING MEANS HAVE CENTERS APPROXIMATING THE EDGES OF THE OBJECT TO BE GAGED AND INCLINE TO REFLECT OPTICAL RADIATIONS FROM THE OBJECT INWARDLY AT AN ANGLE, (B) UNITARY REFLECTING MEANS RECEIVING THE RADIATIONS REFLECTED FROM THE FIRST MEANS AND POSITIONED CENTRALLY TO COMBINE THE REFLECTIONS ONTO A SINGLE BEAM, (C) A SCANNING RADIOMETRIC GAGE POSITIONED IN SAID COMBINED BEAM AND PROVIDED WITH A RADIATION DETECTOR CAPABLE OF TRANSFORMING RADIATION SIGNALS ONTO ELECTRICAL SIGNALS, (D) SAID RADIOMETRIC GAGE BEING POSITIONED TO SCAN SUCCESSIVE PORTIONS OF THE COMBINED BEAM ONTO THE DETECTOR AND (E) THE INNER LIMITS OF THE FIRST REFLECTING MEANS BEING SPACED A CONSIDERABLE DISTANCE FROM THE CENTER OF THE OBJECT TO BE GAGED WHEREBY THE RADIOMETRIC GAGE SCANS ACROSS A NARROW BEAM AT EACH EDGE OF THE OBJECT TO BE GAGED.