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Compound for Destroying Boll-Weevil. (open access)

Compound for Destroying Boll-Weevil.

Patent for a compound for destroying Boll Weevils, consisting of Sulfur, Pine Tar, Asafetida, Pulverized Bluestone, Beaumont Oil, Extract of Tobacco, and a thick adhesive oil.
Date: March 21, 1911
Creator: Armentrout, Richard B.
System: The Portal to Texas History
Compensating Pump-Spring. (open access)

Compensating Pump-Spring.

Patent for improvements in compensating pump-springs by “storing up in the downward or idle stroke of the suction-rod, a power which is expended during the upward stroke to assist the crank in lifting the rod; and at the same time reducing the power required to drive the pump, equalizing the resistance, increasing the efficiency and generally prolonging the life of the entire mechanism.” (Lines 36-40) Illustration is included.
Date: April 21, 1891
Creator: Black, William L.
System: The Portal to Texas History