3 Matching Results

Search Results

Results: 1 - 3

Apparatus for Obtaining a Vacuum.

Description: Patent for a new and improved vacuum. This design utilizes a liquid pump, plates, tubes and valves to make "about as perfect a vacuum . . . as can be obtained by an ordinary pump" (lines 53-55).
Date: July 27, 1880
Creator: Ward, Lyman Henry
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Cotton Planter and Cultivator.

Description: Patent for improvements in cotton planters and cultivators by “attaching one or more levers to the axle which are pivoted to a frame below the axle, in which the levers are also connected with the caster-wheel in front, whereby the frame may be raised so as to elevate the cultivators above the earth.” (Lines 14-19) Illustration is included.
Date: July 27, 1880
Creator: Walsh, James D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
Back to Top of Screen