| 摘要 |
348,076. Locking studs. MORTON, C. A., Telephone Building, The Hyde, Hendon, London.-(Halloy, A. d'; 4, Rue Lyautey, Paris.) Feb. 6, 1930, No. 4005. [Class 89 (i).] A stud is secured against rotation by a helical washer interposed between the stud end and the hole prepared to receive it. The washer 29 of tapering cross section is received into the groove 28. Looking is effected both by the end faces of the split helix engaging the bottom surface of the hole and of the groove, and also by jambing the portions 31 of the stud into the sides of the hole. In a modification the groove is dispensed with, the portion 30 of the stud being used to hold the washer central. In a further modification the portion 30 is also absent. In another modification the washer 29 has more than one complete turn whilst in yet another a distance-piece is inserted in the hole below the stud, which is itself locked by a similar washer. Specifications 285,027 and 312,101, [both in Class 89 (i), Bolts &c.], are referred to.
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