2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
Apparatus for Obtaining a Vacuum.
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
System:
The Portal to Texas History
Cotton Planter and Cultivator.
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.
System:
The Portal to Texas History