Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 346
1399. SCREW THREADS.—UnitedStates Standard Thread. Flat top andbottom. Depth equals 0.65 of the pitch.Angle 60°. 1400. SCREW THREADS, Whit-worth thread. Rounded top and bot-tom. Depth equals 0.75 of the pitch.Angle 550. TRAPEZOIDAL ^-p^-,THREAD I 1 … 1401. SCREW THREADS, Trape-zoidal thread. Angle 90° face, 45° back.Depth equals 0.75 of the pitch. 35^ MILL AND FACTORY APPLIANCES.
Mechanical movements
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