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Nut Lock.
Patent for a new and improved nut-lock. This design "consists of a slide or continuous collar or ring, made of lead or other soft or compressible metal or material, having a hole so that it will fit or pass over the end of an ordinary bolt, and adapted to be pressed into the threads of the bolt and against the face of an ordinary nut by a suitable die" (lines 16-23).
Date:
August 31, 1886
Creator:
Shellenberger, Samuel L.
System:
The Portal to Texas History
Elevator-Door Sill.
Patent for an elevator sill that bridges the gap between the floor and the bottom of the elevator when the elevator doors are open.
Date:
August 31, 1915
Creator:
Doren, Lewis W.
System:
The Portal to Texas History