Portable pantograph c-scan recording flaw detecting system

Claim 1

A portable manually scanned flaw detecting and recording system for recording on a sheet of paper, in one-to-one correspondence; flaws in a structure below a determined area of the surface of the said structure being tested for flaw defects, the said system comprising: a. a parallel motion mechanism having a fixed pivot and a movable pivot with a blade, moving in parallel relationship, having a first end and a second end attached at the said first end to the said movable pivot; b. a suction cup attached at the said fixed pivot of the parallel motion mechanism to removably attach the said mechanism to the said surface of the said structure being tested; c. a flaw sensor attached to the said movable pivot and positioned in detecting relationship to the said surface of the said structure, providing an electrical output indication of a flaw in the said structure; d. a hand wheel attached to the said movable pivot for manually scanning the said sensor over thE said determined area; e. a writing pen; f. means for positioning the said writing pen at the said second end of the said blade, the said positioning means including; 1. a retracting spring holding the tip of the said pen above the said paper, 2. a solenoid having a plunger attached to the said pen for moving the said pen against the force of the said retracting spring into writing engagement on the said paper when the said solenoid is energized, 3. a support rod positioning the writing tip of the said pen over and away from the said sheet of paper when the said solenoid is not energized, 4. means for manually engaging the said pen into writing relationship on the said paper; and g. means cooperating with the output of the said flaw sensor and the said solenoid for energizing the said solenoid when the said sensor is passed over a flaw.