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Nut-Lock.
Patent for nut locks that "as for its object to provide simple means for locking the nut against accidental displacement, at the same time allowing it to be removed by the proper application of force, and, furthermore, to permit the permanent locking of the nut at a pre-determined point." (Lines 9-15) Includes instructions and illustrations.
Date:
August 31, 1897
Creator:
Millen, George
System:
The Portal to Texas History