| 摘要 |
349,541. Lock nuts. DYCKERHOFF, A., 22, Deutscher Ring, Cologne, Germany. Nov. 22, 1929, No. 35849. Convention date, Nov. 22, 1928. Addition to 286.120, [Class 89 (i), Bolts &c.]. Void [Published under Sect. 91 of the Acts]. [Class 89 (i).] A nut is formed from an S-shaped strip of metal provided with tapped holes 2, 3, 4, the middle one being placed out of alignment by bending the portions 5, 6. In a modification the lower hole 4 is not threaded.
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