D. Halpin's patent
- Made:
- 1879
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LicenseD. Halpin's patent, 1879. One Lock nut and bolt 3/4 diameter.'
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© The Board of Trustees of the Science Museum
D. Halpin's patent, 1879. One Lock nut and bolt 3/4" diameter.
This nut, which is about double the ordinary length, is given a certain amount of elasticity by having a saw-cut made parallel to its axis, and extending about half way down. The cut portion is then closed in so that, when screwed on, the bolt has to expand the outer end of the nut against the elasticity of the material, and in this way any shaking is prevented.
