Gearing for Windmills. (open access)

Gearing for Windmills.

Patent for gearing for windmills that "is more particularly designed to provide an improved construction of gearing by which the movement of the wind wheel is transmitted to the pump rod, whereby [the inventor] secures superior advantages with respect to efficiency in use" (lines 14-19).
Date: April 23, 1895
Creator: Keys, Milton
System: The Portal to Texas History
Antifreezing Valve and Closet-Cistern (open access)

Antifreezing Valve and Closet-Cistern

Patent for "valves which will allow all the water to flow out of the popes to a position below freezing-point after each application of water, whether the water is used in a closet-cistern or drawn out of a hudrant or other application is made, and to arrange the valves so that the supply-valves will be automatically closed by water-pressure in connection with the operation of a siphon in a closet-cistern and the waste-valve will be closed by the pressure of water, siphonic action, or both, when the supply-valves are opened." (lines 18-28).
Date: April 23, 1901
Creator: Wilkes, George W.
System: The Portal to Texas History
Coupling for Connecting Plows Tandem. (open access)

Coupling for Connecting Plows Tandem.

Patent for a coupling for holdings plows together that allows for the plows to be close together, easily turned, and lets each plow perform its full function uninhibited by the other plows.
Date: April 23, 1907
Creator: Brooks, John L. M.
System: The Portal to Texas History
Closet-Cistern and Valve Therefor (open access)

Closet-Cistern and Valve Therefor

Patent for "a cistern which needs no valve to start the siphon to work and to construct a valve which can be operated by a rod which runs up through the supply-pipe, thus doing away with the stuffing-box for a rod for operating the valve" (lines 11-16).
Date: April 23, 1901
Creator: Wilkes, George W.
System: The Portal to Texas History
Improvements in the Concentration and Purification of Sludge Acid (open access)

Improvements in the Concentration and Purification of Sludge Acid

Patent for improvements in the concentration and purification of sludge acid in petroleum refineries.
Date: April 23, 1918
Creator: Slater, William A.
System: The Portal to Texas History