Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)
Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 57
147. FRICTION MACHINE, for testingfs the friction of wheels at various speeds andloads. The adjustable circular balance holdsthe wheels or vehicle in place. The poundstension on the scale multiplied by the periph-eral velocity in feet per minute gives the foot-pound draft or friction. so… … 148. TORSION DYNAMOME-TER.—To a driving shaft E is attachedat C a helical spring. To the otherend of the spring is attached a trans-mission pulley A and a small pulleyQi, moving freely on the shaft E. AtQ2 another small pulley is fixed to shaft E. The tension of trans-mission displaces the relative…
Mechanical movements
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