Crown Setter (open access)

Crown Setter

Patent for a crown setter that can make impressions of varying sizes with the same tool.
Date: July 6, 1920
Creator: Lewis, Samuel Riley
System: The Portal to Texas History
Method and Apparatus for Coating Pipes, Bars, Angles, and the Like. (open access)

Method and Apparatus for Coating Pipes, Bars, Angles, and the Like.

Patent for improved method of coating pipes, bars, angles, etc., by applying centrifugal force to the item after being immersed in a coating bath.
Date: July 13, 1920
Creator: Watrous, Edward L.
System: The Portal to Texas History