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3 Matching Results
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Improvement in Piano-Forte Actions.
Patent for a new piano forte design which "consists in certain novel details of construction, arrangement, and combination of the key-lever and its fulcrum and rest, a receiving-lever, a transmitting-eccentric, a secondary hammer, a principal hammer and its rest, and a damper-action and its connections, whereby greater simplicity and efficiency are obtained" (lines 10-17) including illustrations.
Date:
May 27, 1879
Creator:
Roedern, George O. V.
System:
The Portal to Texas History
Improvement in Cultivators.
Patent for a triangle shaped cultivator with removable mold-boards that can be used as a plow and scraper, including illustration.
Date:
May 10, 1859
Creator:
Doss, William C.
System:
The Portal to Texas History
Sewing-Machine.
Patent for a sewing machine "which will cut or trim the edges of two pieces of cloth during the time that said edges are being stitched together by the needle" (lines 15-18) with instructions and illustrations.
Date:
May 13, 1913
Creator:
Singer, William W.
System:
The Portal to Texas History