With counter balancing device and 15 degrees inerval of automatic indexing
An instrument primarily used in drafting, consisting of two joined arms, one end being secured to a stationary surface and the other end equipped with an adjustable protractor and removable ruled scale(s); or two rigid beams, one beam anchored across full length of top of drawing board, the other beam perpendicular to top beam equipped with adjustable protractor and removable ruled scale(s). It is used as a guide for drawing parallel lines at any angle on a chart or drawing, or transmitting reference points.
Classification: Drafting tables and machines, whether or not automatic
NSN 5935-01-437-5777
NSN 5905-00-249-8195
NSN 5915-01-364-2251
NSN 6685-00-671-3483
NSN 5950-01-108-4569
NSN 5925-00-852-2820
NSN 5999-00-499-8949
NSN 5996-00-176-0999
NSN 6685-00-761-8951
NSN 5910-00-906-1434
NSN 6220-01-399-7548
NSN 5975-01-415-0068