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Traveling Block.
Patent for a traveling block construction. The invention resides in the combination and arrangement of parts and in the details of construction that provide a novel form of nut to be positioned on the ends of the supporting shaft of the block, the nuts being hollowed out to provide oil chambers for supplying the shaft with a lubricant.
Date:
December 16, 1920
Creator:
Boykin, Burwell Jr.
System:
The Portal to Texas History