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Weighing-Scale

Description: Patent for an improved weighing scale that is made in a way that prevents error in weighing objects.
Date: June 27, 1905
Creator: McKee, Clarence W.
Partner: UNT Libraries Government Documents Department

Reciprocating Electric Engine

Description: Patent for "means for employing an ordinary continues current from a suitable source to produce an oscillating primary magnetic field of a solenoid-magazine and to use said magnetic field for setting a piston-like armature in a reciprocal axial motion to develop mechanical power in both directions" (lines 11-17).
Date: June 13, 1905
Creator: Wagner, Bruno Otto
Partner: UNT Libraries Government Documents Department
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