Friel Clutch (Fig. 5) is used in connection with a hoist ing-drum, such as is used in pile-drivers and like hoisting machinery. The sectional view shows its use as a cut-off coupling. The rim of the clutch, as shown, contains a groove with internal beveled surfaces, each of which is pressed by wooden blocks which are drawn outward by the operation of a bent au•m-lever, the long arm of which rides upon a cone, which is moved along the shaft by the shifting lever.
Frictional new system of transmitting power by belts and pulleys. made by the Evans Friction Cone Co., of Boston, is shown in Fig. 6. The power is transmitted from one pulley to another, with which it is nearly in contact, by a ring or belt of leather, which is gripped between the adjacent surfaces of the pulleys, and transmits the power by friction. The diagram (Fig. 6) shows the principle of the system. The diametrical line II It the points of contact of the belt when the pulleys are kite, but little pressure remaining upon the belt. The oblique line A A shows the points of contact of the belt when the pulleys are in motion. The force of the driving pulley C is transmitted to the outer face of the pulley 1), in a line obliquely with the axis of the driven pulley.
Almond's _IGO-I-angled Coupling.—Fig. 7 shows a form of shaft-coupling made by T. E. Almond, lirooklyn, N. V., for transmitting motion between two shafts at right angles to each
other. The sleeve A, which slides: on the post II, carries two studs C at right angles to each other. each of which is connected by a ball-and-cup joint to the forked piece I', which oscil lates on pins formed on the piece which rotates with the pulley Ii. Motion being given to either pulley K, it causes the stud C on the same side to be carried upward and downward, and to be oscillated back and forth as the sleeve it moves on the post 13. On the other side these motions are all reproduced. causing the other pul ley IC to rotate. The coupling is inclosed in a metal ease. which holds a supply of oil sufficient to last from one to two years.
The States Machine Co.'s Angle-Joint is shown in Fig. 8. One joint will operate within an angle of 110°, and a- pair used jointly will operate within 70°. The sec tional view clearly shows the construction. The end of each of the coupled shafts is fitted with a piece carrying a semicircular projection T-shaped in section. These projections fit into T-shaped grooves cut at right angles in a steel ball. The ball is made in pieces for the purpose of putting the coupling together. The coupling is especially adapted for feeding devices of machine-tools where the power has to be transmitted at a varying angle.