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Two-dimensional scanner apparatusAn X-Y scanner utilizes an eddy current or ultrasonic current test probe to detect surface defects in small flat plates and the like. The apparatus includes a scanner which travels on a pair of slide tubes in the X-direction. The scanner, carried on a carriage which slides in the Y-direction, is driven by a helix shaft with a closed-loop helix groove in which a follower pin carried by scanner rides. The carriage is moved incrementally in the Y-direction upon the completion of travel of the scanner back and forth in the X-direction by means of an indexing actuator and an indexing gear. The actuator is in the form of a ratchet which engages ratchet gear upon return of the scanner to the indexing position. The indexing gear is rotated a predetermined increment along a crack gear to move carriage incrementally in the Y-direction. Thus, simplified highly responsive mechanical motion may be had in a small lightweight portable unit for accurate scanning of small area.
Document ID
19840014860
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Kurtz, G. W.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Bankston, B. F.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 4, 2013
Publication Date
March 6, 1984
Subject Category
Instrumentation And Photography
Report/Patent Number
Patent Number: NASA-CASE-MFS-25687-1
Patent Application Number: US-PATENT-APPL-SN-350474
Patent Number: US-PATENT-4,434,659
Accession Number
84N22928
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-MFS-25687-1|US-PATENT-4,434,659
Patent Application
US-PATENT-APPL-SN-350474
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