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Well-Drilling Rig.

Description: 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.
Partner: UNT Libraries Government Documents Department

Well Screen.

Description: 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
Partner: UNT Libraries Government Documents Department

Building-Block.

Description: 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.
Partner: UNT Libraries Government Documents Department

Tree and Brush Cutter.

Description: Patent for a motorized tree and brush cutter that is portable.
Date: February 14, 1911
Creator: Andrews, Robert Lyle
Partner: UNT Libraries Government Documents Department

Utilizing Sulfur-Containing Petroleum.

Description: Patent for a method of removing sulfur from Beaumont petroleum and converting it into sulfuric acid.
Date: February 20, 1912
Creator: Robinson, Clarence I.
Partner: UNT Libraries Government Documents Department

Pump Cylinder

Description: Patent for a removable liner for a pump cylinder bore, including illustrations.
Date: February 24, 1914
Creator: Black, Lee J.
Partner: UNT Libraries Government Documents Department

Steam Face-Bath

Description: Patent for an apparatus that provides a steam bath for the face. Illustrations included.
Date: February 15, 1910
Creator: Dalzelle, Sanford J.
Partner: UNT Libraries Government Documents Department

Oil-Tank.

Description: Patent for an oil tank with an improved design for extinguishing fires inside the tanks and a means for allowing the escape of exploded gases upon accidental ignition.
Date: February 9, 1915
Creator: Wasson, Edgar Allen & Cooley, Francis Marion
Partner: UNT Libraries Government Documents Department

Manufacture of Aluminum Chlorid

Description: Patent for method of making aluminum chlorid, where a form of hydrated alumina is combined with coking coal, and then exposed to heat and chlorin/chlorin containing gas.
Date: February 27, 1917
Creator: McAfee, Almer M.
Partner: UNT Libraries Government Documents Department

Post-Hole Auger.

Description: Patent for a post hole auger that is easy to operate.
Date: February 7, 1911
Creator: Mahon, John G. & Olschner, Clarence E.
Partner: UNT Libraries Government Documents Department

Still and Still-Setting

Description: Patent for Still and Still-Setting.
Date: February 15, 1916
Creator: Henderson, Herbert
Partner: UNT Libraries Government Documents Department

Nut-Lock.

Description: Patent for a nut-lock that holds the nut more securely in place than previous ones. Used primarily in railroad joints, but can be used in a variety of other applications.
Date: February 19, 1907
Creator: Baldwin, John H.
Partner: UNT Libraries Government Documents Department

Manufacture of Aluminum Chloride.

Description: 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.
Partner: UNT Libraries Government Documents Department

Still.

Description: Patent for a still designed to refine crude petroleum and extract lighter elements, including illustrations.
Date: February 11, 1919
Creator: Gallsworthy, Benjamin
Partner: UNT Libraries Government Documents Department

Utilization of Aluminum-Chlorid Residues.

Description: 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
Partner: UNT Libraries Government Documents Department

Pan Lifter and Turner.

Description: Patent for a pan lifter and turner using a bent handle, a curved plate is secured at the end of the bent handle; extending upward from the curved plate with a series of teeth to engages the crimped rim of a pan for lifting. At both ends of the curved plate provided with curved notches or recesses to receive and engage the rim of a pan for turning. Illustration is included.
Date: February 10, 1891
Creator: Ericson, John
Partner: UNT Libraries Government Documents Department

Oil-Burning System

Description: Patent for a liquid fuel system used for burning crude oil. Illustrations included.
Date: February 1, 1910
Creator: Duke, Holmes
Partner: UNT Libraries Government Documents Department

Pipe-Wrench.

Description: Patent for improvements to pipe wrenches to a more simple design.
Date: February 16, 1915
Creator: Lewis, Guy V.
Partner: UNT Libraries Government Documents Department

Plunger.

Description: Patent for a plunger for use in pumps and air compressors that fits tightly into the cylinders of the machine.
Date: February 27, 1912
Creator: Ohmstede, August
Partner: UNT Libraries Government Documents Department

Rotary Drilling-Machine

Description: Patent for a rotary drilling machine for drilling oil wells. Illustrations included.
Date: February 18, 1913
Creator: Black, Lee J.
Partner: UNT Libraries Government Documents Department

Garment-Fitting Device.

Description: Patent for a series of flexible bands and tapes to be used for efficient fitting of garments with regards to seam lines and marking patterns upon cloth by measuring the waist, skirt, and sleeve areas.
Date: February 2, 1909
Creator: Johnson, Mary M.
Partner: UNT Libraries Government Documents Department

Sectional Dam and Flume

Description: Patent for a sectional dam and flume for small waterways that takes the water to a turbine.
Date: February 4, 1913
Creator: Holmes, Clayton F.
Partner: UNT Libraries Government Documents Department

Monolithic Wall.

Description: 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
Partner: UNT Libraries Government Documents Department

Direction Signal for Automobiles.

Description: 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.
Partner: UNT Libraries Government Documents Department
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