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Combination Motion-Picture and Sound-Reproducing Mechanism.
Patent for a connecting mechanism between the motion picture and sound reproducing mechanisms. If the two get out of sync, there are manually operable means to halting one until the other has caught up.
Date:
June 4, 1918
Creator:
Kirkwood, Abraham L.
System:
The Portal to Texas History
Sandpapering-Machine.
Patent for a compressed air sanding machine to use in finishing surfaces with sandpaper, emery cloth, or other rubbing material.
Date:
January 8, 1918
Creator:
Morreau, Emile V.
System:
The Portal to Texas History