Hydrostatic Indicator for Weighing Scales. (open access)

Hydrostatic Indicator for Weighing Scales.

Patent for a new and improved hydrostatic indicator for scales. This design consists in "a reservoir, an outer cylinder, a hollow inner cylinder, an attached stand-pipe, and registering-dial, said inner cylinder being surrounded by and sliding within said outer cylinder, said outer cylinder being provided with an attached inlet-pipe communicating with said reservoir, said pipe being provided with two valves, in combination with a bearing-bar, side rods, and under bar, forming a frame bearing upon the inner cylinder" (lines 55-65).
Date: February 5, 1889
Creator: Lewis, Henry A.
System: The Portal to Texas History
Well Drilling Machine. (open access)

Well Drilling Machine.

Patent for a driving mechanism to reduce the numbers of shafts and other parts needed for well drilling. The invention allows for one main driving shaft to be used as the primary source for well drilling.
Date: February 5, 1918
Creator: Herdman, Adam H.
System: The Portal to Texas History