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Improvement in Permutation-Locks. [PAGES MISSING]
Patent for an improvement to combination locks. "It consists of various devices, which are operated by a revolving wheel having a number of projections or pins upon its periphery, which differ so materially from each other in shape that they can be easily recognized by day or night by the touch alone." (Lines 13-19) Illustration included.
Date:
September 9, 1873
Creator:
Hall, Phildello W.
System:
The Portal to Texas History
Improvement in Bridges.
Patent for an improvement in Bridges and Self-Supporting Roofs and Girders. The invention provides instruction for "the construction of truss-bridges and self supporting roofs and girders"..."by nailing or bolting securely together successive layers of plank joined at different points."
Date:
May 26, 1873
Creator:
Davis, Benjamin F.
System:
The Portal to Texas History