Level-Indicator.
Description:
Patent for a new and improved level indicator, intended for use with airplanes and other flying machines to indicate the angle of ascent or descent, as well as when the machine is on a level keel. The level indicator is designed to have a water-tight casing and weatherproof joints and has brackets to secure it to the airplane.
Date:
November 5, 1918
Creator:
Westbrook, Homer S.
Partner:
UNT Libraries Government Documents Department