Threshold.
Description:
Patent for an improvement for thresholds to consist of a single metal plate with an arched central portion and laterally-projected flanges that is cheaper and easier to make. The threshold will create a tight joint with the bottom of a door to prevent water and dust from entering through the bottom of the door.
Date:
April 11, 1916
Creator:
Krause, Ernest
Partner:
UNT Libraries Government Documents Department