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Level-Indicator.
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.
System:
The Portal to Texas History
Matrix Molding Device.
Patent for improvements on matrix molding devices, "to provide simple devices or improvements in matrices of standard size and adaptation for use in linotype and other line casting machines for preparing the operating edges of printers' slugs for holding cross-rules" (lines 10-15), including illustrations.
Date:
November 4, 1918
Creator:
Markwell, Andrew E. & Evans, S. C.
System:
The Portal to Texas History