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Adding Machine.
Patent for a new and improved adding machine. This design "consists in the combination, with a box, of a spindle in the same, a sleeve surrounding the spindle, a hand on the spindle, a hand on the sleeve, devices for turning the spindle from the sleeve, a cog-wheel revolving from the spindle, and an extra hand in connection with the cog-wheel" (lines 10-16).
Date:
September 22, 1885
Creator:
McCaleb, John L.
System:
The Portal to Texas History
Adding-Machine.
Patent for a new and improvement in adding-machines in which a mechanical wheel has teeth. " The object of the invention is to provide the means for adding columns of figures by machinery"(lines 13-15), with instruction and illustration
Date:
February 12, 1884
Creator:
Barmore, Albert King
System:
The Portal to Texas History
Measuring Wheel.
Patent for a new and improved measuring-wheel. This design "relates to the construction of an instrument whereby lineal measurements may be taken and automatically registered where the distance is greater than the circumference of the measuring-wheel. The invention consists of a graduated wheel in the slot of a bifurcated handle, and of an automatic registering attachment" (lines 7-14).
Date:
June 29, 1886
Creator:
McCaleb, John L.
System:
The Portal to Texas History