American machinists' handbook and dictionary of shop terms : a reference book of machine shop and drawing room data, methods and definitions (1914)
Colvin, Fred H. (Fred Herbert), 1867-1965, Stanley, Frank A. (Frank Arthur), b. 1874 · New York : McGraw-Hill book company ; London : Hill · leaf 603
CALIPERS Finn Joint Calipers — Having a large, firmjoint in place of old style plain rivetedjoint. This is an inside caliper. Gear Tooth Caliper — A caliper with twobeams at right angles. The verticalbeam gives tooth depth to pitch lineand the other the thickness at pitchline. Both have verniers.…
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.