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Vignetting Attachment for Multiple-Exposure Cameras.
Patent for a multiple exposure camera attachment that allows multiple exposures to be made on a single plate or film, blending the exposures perfectly while avoiding harsh lines. The attachment is a telescopic tubular attachment with "a plurality of apertured light ray interrupting diaphragms" (lines 77-78).
Date:
April 5, 1921
Creator:
Moine, Selest E.
System:
The Portal to Texas History
Silo
Patent for a silo composed of sections that can be arranged to modify the capacity as needed, including illustrations.
Date:
April 21, 1914
Creator:
Ames, James W.
System:
The Portal to Texas History
Spring-Wheel.
Patent for a steel wheel with springs for automobiles that reduces jarring, is affordable, and does not get damaged as easily as the pneumatic tires previously in use on automobiles.
Date:
April 23, 1907
Creator:
Tubbs, William Oscar
System:
The Portal to Texas History