| 摘要 |
412,422. Testing friction. RAYBESTOS-MANHATTAN, Inc., 1427, Railroad Avenue, Bridgeport, Connecticut, U.S.A.- (Assignees of Tilden, S. G.; Stewart Manor, Long Island, New York, U.S.A.) July 15, 1933, No. 20077. Convention date, July 15, 1932. [Class 106 (ii).] A device for determining the coefficient of friction between two materials, adapted among other uses for direct application to the surface of brake linings of a motor-vehicle, comprises a rotatably driven member 19 having its end 34 pressed into frictional contact with the surface to be tested, and an inner driving spindle 11 carrying a transverse shaft 13 which carries a collar 16 adapted to follow a cam slot 22 of varying slope in the driven member 19. The axially-movable spindle 11 may be driven at a uniform velocity by a hand-drill or drill-press, and as it rotates, the roller and cam effects the rotation of the member 19 and contact tip 34 on the surface to be tested, the position taken up by the roller in the cam slot serving to indicate the coefficient of friction, which value is shown by the projecting scale 18 on the spindle 11. |
