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Plate-Guard for Secondary Batteries.

Description: Patent for a plate-guard for secondary batteries. The invention relates to guard sheaths or envelopes to provide light, rigid, and inexpensive frame of acid-proof material to be build around the plate to protect the exposed metal of the plate.
Date: November 20, 1917
Creator: Luthy, Joseph O.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Ensilage-Cutting Machine.

Description: Patent for ensilage-cutting that will efficiently cut corn and other rough feed. It can be driven clockwise of anti-clockwise, can discharge the cut feed at different points, and has few parts. There are no cogs or gears to catch the operator's clothing.
Date: November 20, 1917
Creator: Sinclair, William
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Apparatus for Projecting Motion-Pictures.

Description: Patent for an improvement to motion picture projectors that lowers the operating speed, thus reducing the amount of film needed for movies, and eliminates flickers in the projection. This patent includes instructions and illustrations.
Date: November 27, 1917
Creator: Craig, Richard M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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