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 6685-01-464-3766
NSN 6220-01-199-5356
NSN 5998-00-898-2372
NSN 6105-00-112-9099
NSN 6130-01-062-2244
NSN 6620-01-446-6571
NSN 5990-00-446-0518
NSN 6685-01-383-6522
NSN 6110-01-589-1812
NSN 6320-00-731-6134
NSN 5950-01-628-5642
NSN 2925-01-528-7333