GB191300925A - Improvements in and relating to Means for Locking Nuts on Screw Belts, Shafts and the like. - Google Patents

Abstract

925. Hedderwick, H. J. Jan. 13. Locking nuts.- A device for locking nuts on bolts, which does not require to be bent or deformed after its application, comprises a head B, Fig. 1, formed to engage a recess, slot, or projection on the bolt, and two or more spring arms D, turned down to engage opposite sides or corners of the nut. The arms D are turned in at E to spring into a recess A at the base or other part of the nut, or under the lower face of the nut, or into holes in the sides of the nut. The head B may be formed as a hood to cover the end of the bolt. Instead of having a cross-bar engaging a slot in the bolt, a pair of tongues may be struck from the head B, or the arms D, to enter a slot or grooves in the bolt, or the end of the bolt may be rectangular or formed with one or more longitudinal ribs, and may pass through a similarly-shaped aperture in the head, an adjustment of the device being effected by this means. As shown in Fig. 7, the cross-bar consists of a separate part fixed in the head B and formed with a projection C' to facilitate the removal of the device. To enable the device to be disengaged, an opening for the insertion of a tool is formed in each of the arms D by bevelling one side at F, Fig. 1, or by forming a swell or a struck-up tongue on the arm. Fig. 12 shows the application of the device to a pipe coupling. The head B is keyed to a circular nut A, or surrounds an angular nut, and the arms D spring at E and E<1> over the ends of another nut. The locking- bar C or the projections on the head B may be angularly adjustable with respect to the arms D. For this purpose, the arm C, Fig. 20, is made as a separate part, with downturned ends springing into a series of ratchet teeth formed on the edge of an opening in the head B, or the ends of the bar may be movable in slots formed in the head. In another form, the head has a number of curved tongues, two of which spring into opposite sides of the slot in the bolt. As shown in Fig. 34, a cap B<5> containing the cross-bar, and the head B are formed with annular rows of teeth, which come into engagement in any desired position when the side arms are pressed down over a nut. Fig. 30 shows a means for releasing the device, consisting of two bulb-ended keys K, which are drawn up, or, in another form, pressed together, to release the arms D. In a modification, the arms are made separate from the head and are extended upwards through slots in the head. Fig. 33 shows the device made from wire instead of from sheet metal. When applied to a circular nut, the device has narrow arms D, which engage a number of grooves formed on the outer surface of the nut.