GB190602252A - An Improved Direct-driving and Reversing Friction Gearing. - Google Patents

Abstract

2252. Getzmann, F. W. Jan. 29. Fiction gearing; shaft couplings; clutches.- Relates to means for preventing the slipping of friction rollers employed between two concentric tracks in reversing-gearing. The rollers c are carried by a disk d and a ring i secured to it, and bear on a drum b on the driving-shaft a, and on a split ring g which is provided with grooves h containing rollers k which bear on a second split ring m. The outer surface of the ring m is coned to engage a drum o secured to the driven shaft n. A sleeve q, keyed on the shaft a, is provided with arms t carrying expansible segments u, pivoted to pieces j which are separated at one end by a pin w and at the other by an arm s on a sliding collar r. When the collar r is pressed forward, the segments u are expanded and a spring-pressed pin z in the arm s engages a hole y in the disk d, causing the drum b and rollers c to move together. The ring g is carried round, and the rollers k, moving in the grooves h, press the ring g on the rollers and the ring m securely against the driven drum o. for reversal, the collar r is moved back and the disk d braked. The drum b, rollers c, and ring g may further be formed with circumferential taper grooves to prevent slip.