Well-Drilling Rig. (open access)

Well-Drilling Rig.

Patent, including illustrations, for "an improved well drilling rig or apparatus" which provides "a simple, efficient, and practical machine of this kind including revoluble means having a device operatively connected to a walking beam (from which a drilling tool is suspended), so that upon every complete revolution of the revoluble means, the drilling tool or bit will be given two direct drops, each alternating with the lifting movement of the drill bit" (page 1, lines 11-21).
Date: February 3, 1920
Creator: Bradford, Robert M.
System: The Portal to Texas History
Well Screen. (open access)

Well Screen.

Patent for a well screen device. The device can keep particulates out of the well water while also restricting water to flow into the well without being released back into the soil.
Date: February 1, 1921
Creator: McLean, Marrs
System: The Portal to Texas History
Building-Block. (open access)

Building-Block.

Patent for building block that is easily formed or molded. The building block forms tiers to easy move around and modify.
Date: February 1, 1921
Creator: Pace, Vara L.
System: The Portal to Texas History
Manufacture of Aluminum Chloride. (open access)

Manufacture of Aluminum Chloride.

Patent for improvements of manufacture of aluminum chloride, comprising "a method of utilizing certain oily residues which are the result of treatment of oils with aluminum chloride or with substances capable of forming aluminum chloride" (lines 11-14), including illustrations.
Date: February 7, 1922
Creator: McAfee, Almer M.
System: The Portal to Texas History
Utilization of Aluminum-Chlorid Residues. (open access)

Utilization of Aluminum-Chlorid Residues.

Patent for "new and useful Improvements in the Utilization of Aluminum Chlorid Residues" (lines 6-7) including instructions and illustrations.
Date: February 24, 1920
Creator: Abbott, Lyle Stockton
System: The Portal to Texas History
Monolithic Wall. (open access)

Monolithic Wall.

Patent for concrete wall construction which is light in weight and inexpensive to fabricate. Frames may be previously constructed in a manner to allow for windows and other common wall features.
Date: February 7, 1922
Creator: Graham, Malcolm J
System: The Portal to Texas History
Direction Signal for Automobiles. (open access)

Direction Signal for Automobiles.

Patent for lit directional signal for automobiles that indicates driver's intention to stop or to turn left or right, including illustrations.
Date: February 7, 1922
Creator: Womack, Foster B.
System: The Portal to Texas History