Electrical Apparatus for Heating Stills, Boilers, and the Like.
Description:
Patent for "Improvements in Electrical Apparatus for Heating Stills, Boilers, and the like" (lines 6-8) that uses electricity and includes "a heating element which is not affected by repeated changes in temperature, which is adapted to present a heating surface of large area, which may be raised to a high temperature with a low current, and which is many times more economical in use than metal coils possessing less heat radiating powers" (lines 21-28) including illustrations.
Date:
April 9, 1918
Creator:
Lorenz, Charles O.
Partner:
UNT Libraries Government Documents Department