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 5895-01-319-3583
NSN 5835-01-143-9143
NSN 5905-01-180-7143
NSN 5950-01-646-3932
NSN 6145-01-141-4127
NSN 5925-00-605-6448
NSN 5905-01-364-1160
NSN 6645-01-004-0803
NSN 6150-00-678-9294
NSN 6110-00-410-2576
NSN 6135-00-162-2437
NSN 4140-01-513-9139