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Hanging Millstones.

Description: Patent for improvement of hanging millstones using a driver to hang the runner of a pair of millstones, “as it rotates, adjust itself to the position of the stationary stone, and the parallelism of the faces of the two stones be preserved whether the stationary one be perfectly horizontal or not” (lines 19-24), including illustration.
Date: May 29, 1860
Creator: Dance, G. P.
Item Type: Refine your search to only Patent

Improvement in Insect-Destroyers.

Description: Patent for "machines which are designed for distributing poison-dust over the leaves of plants for the destruction of insects, especially the worms which prey on the cotton-plant." (Lines 11-15) Includes instructions and illustrations.
Date: December 29, 1874
Creator: Eldridge, Frank A.
Item Type: Refine your search to only Patent

Improvement in Scale-Beams.

Description: Patent for "the movable weight used on scale-beams; and it consists in the construction and arrangement of the weight to slip over the scale-beam, and with a roller, upon which the weight rests or is suspended, in combination with a locking device." (Lines 12-17) Includes instructions and illustrations.
Date: June 29, 1875
Creator: Robinson, William T.
Item Type: Refine your search to only Patent

Improvement in Instruments for Filling Teeth

Description: Patent for improvement in instruments for filling teeth. "The object of this invention is to furnish an improved mode of filling teeth, by the use of which the filling may be built up, hardened, and polished at once, so that the filling will be as hard as marble when the patient leaves the operator's chair, and so that they can be immediately used for masticating."
Date: February 29, 1876
Creator: Ludwig, Carl D.
Item Type: Refine your search to only Patent
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