Improvement in Permutation-Locks. [PAGES MISSING] (open access)

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 Cotton-Cultivators. (open access)

Improvement in Cotton-Cultivators.

Patent for a new improvement for a cotton-cultivator with different tools and connections, including instructions and illustrations.
Date: May 6, 1873
Creator: Bates, Finis L.
System: The Portal to Texas History
Improvement in Combination Locks. (open access)

Improvement in Combination Locks.

Patent for combination latch-locks, "in such manner as that the knob-latch, while performing its special function, will also serve as the lock upon any combination to which it may be adjusted, and the said latch can be operated from either the outside or inside of the door as a latch simply, or as a combination lock, which latter is further secured from the inside by the employment of a safety pin, rendering the bolt in its locked position perfectly secure, while by its partial withdrawal it prevents the possible change of the combination from the outside, and admits of the free use of the latch independent of such combination." (Lines 29-42) Includes instructions and illustrations.
Date: July 1, 1873
Creator: Hall, Phidello W.
System: The Portal to Texas History
Improvement in Bridges. (open access)

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