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Robert Smith
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6156. Smith, R. March 14. Locking nuts.- The nut a is formed with an undercut slot b to receive a spring fork c, which engages a square, polygonal or flattened part of the bolt. The fork c has a slot e to facilitate removal by means of a tool.
GB190606156D1906-03-141906-03-14Improvements in and connected with Means of Securely Fastening Nuts on Bolts.
ExpiredGB190606156A
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