spiral-jaw clutch

spiral-jaw clutch

[′spī·rəl ¦jȯ ‚kləch]
(mechanical engineering)
A modification of the square-jaw clutch permitting gradual meshing of the mating faces, which have a helical section.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.