| 摘要 |
381,718. Locking nuts and bolts. UNITED AMERICAN BOSCH CORPORATION, Springfield, Massachusetts, U.S.A.- (Assignees of Martin, J. F. ; 52, Eldridge Street, Springfield, Massachusetts, U.S.A.) Oct. 6, 1931, No. 27797. Convention date, Feb. 26. [Class 89 (i).] A bolt head or nut is provided with a resilient flange 4 initially inclined to the axis of the bolt so that when screwed into a recess 8, the flange flattens and grips the side. The recess may be provided with a groove 9 or the flange may be made sharp to cut its own groove. The bolt head or nut may have a groove 13 and the flange may be cut into sections 14. |
