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3 Matching Results
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Jack.
Patent for a jack for lifting heavy loads on railroads, which has an automatic steady movement of the load up and down without adjusting the jack settings.
Date:
August 6, 1907
Creator:
Blake, David Alexander & Blake, Charles William
System:
The Portal to Texas History
Calculating-Machine
Patent for certain new and useful improvements in calculating machines. Whereby substantially correct calculations may be registered or recored without using a series of superfluous or immaterial numbers. The machine will round prices up to the nearest cent. For example, $0.024 becomes $0.02 while $0.025 becomes $0.03. Illustrations included.
Date:
March 6, 1917
Creator:
Hardgrave, Everett J.
System:
The Portal to Texas History
Ice-Tray
Patent describing a "combined water-cooler and ice tray [...for] the cooling of water by ice without the ice coming in contact with the water" (lines 9-12).
Date:
May 6, 1902
Creator:
Henning, Thomas W.
System:
The Portal to Texas History