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Combination Cotton-Plow.

Description: Patent for a combination cotton plow that makes hoeing more efficient and profitable. Includes instructions and illustrations.
Date: December 8, 1891
Creator: Williams, Charley Mabry
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Adding-Machine.

Description: Patent for am adding machine by using two disks, one a units-disk with pins in multiples of ten, one a tens-disk, is an annular disk with pin surrounding the units disk, an outwardly spring-pressed holder having a beveled outer end frictionally engaging the pins of the tens-disk and a carrier having oppositely-beveled ends engaged a supplemental pin and one pin on the tens-disks, teeth in the adjacent faces of the holder and carrier, and an idle-gear between them to enable the adding operation.… more
Date: May 12, 1891
Creator: Wright, Joseph W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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