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6 Matching Results
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Calculator
Patent for a calculator which consists of semicircular device with movable pointers and number indexes printed on it that allows the pointers to be moved to different numbers to produce the answer to a math problem such as calculating the cost of goods sold by the pound in a store.
Date:
December 21, 1909
Creator:
Goss, George Wilson
System:
The Portal to Texas History
Water-Wheel.
Patent for a water wheel for creating power, which has a greater power producing capacity with less water required than usual through the use of a special type of bucket on the wheel.
Date:
November 23, 1909
Creator:
Dennis, Decatur D.
System:
The Portal to Texas History
Rail Connection.
Patent for a rail connection, which is smooth when the train passes over it and durable.
Date:
June 8, 1909
Creator:
Hendricks, Willis A.
System:
The Portal to Texas History
Pump-Plunger
Patent for a pump-plunger.
Date:
April 7, 1903
Creator:
Scott, Eugene
System:
The Portal to Texas History
Dentistry
Patent for a device to tighten and hold loose teeth to the jaw.
Date:
November 11, 1902
Creator:
Martin, George G.
System:
The Portal to Texas History
Pump-Piston.
Patent for an improvement on Pump-Pistons."This invention has for its object to provide a pump-piston constructed entirely of metal in order to avoid the use of packings constructed of leather or other rapidly-wearing material; and the invention consists in certain novel features of construction herinafter fully described." (Lines 15-21) Illustration is included.
Date:
December 31, 1901
Creator:
Kincaid, Walter H.
System:
The Portal to Texas History