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Magneto-Contact.
Patent for magneto contacts, designed for easy removal, cleaning, and replacement, without short circuits, featuring novel construction features and parts arrangements.
Date:
April 26, 1921
Creator:
Rigsby, Virgil.
System:
The Portal to Texas History
Process for Hardening Copper.
Patent for a process of hardening copper to prevent bending and scaling of the metal. The process involves heating copper to a high temperature (1370 degrees Fahrenheit) and then subjecting it to continual pressure through hammering it until cold.
Date:
February 24, 1920
Creator:
Beckham, Dewitt T.
System:
The Portal to Texas History