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Map of Carson County

Description: Blue line print of survey map of Carson County, Texas, showing rivers, creeks, original land grants or surveys, blocks of land, cities, towns, and railroads. Handwritten notes have been made on the published map in pencil to denote the addition of Old Santa Fe Trail and Tascosa Road. Scale [ca. 1:177,778] (4000 varas to 3/4 of an inch).
Date: 1898
Creator: Pressler, Herman
Partner: Hardin-Simmons University Library

Engine-Starter

Description: Patent for improvements to engine starters that enable the driver of an automobile to start an engine by applying pressure to foot pedals.
Date: June 24, 1913
Creator: Morgan, August C.
Partner: UNT Libraries Government Documents Department

Driving Mechanism for Tractors

Description: Patent for an invention relating to the engines of tractors that provides "improved transmission gearing for controlling the movements of the machine." (lines 17-18)
Date: August 19, 1913
Creator: Ingram, Joseph D.
Partner: UNT Libraries Government Documents Department

Draft-Gear.

Description: Patent for improvements in draft-gear by using a drive wheel and an arcuate guide to maintain the line of draft from the load to the center of the main or drive axle irrespective of the position of the load relative to the engine (lines 17-20). Illustration is included.
Date: July 8, 1913
Creator: Ingram, Joseph D.
Partner: UNT Libraries Government Documents Department

Reversible Steam-Engine.

Description: Patent for "reversible reciprocating steam engines, its objects being to simplify the mechanism for reversing the valve, and to provide a valve in which the area of steam pressure upon its face is reduced to the minimum." (Lines 14-19) Includes instructions and illustrations.
Date: July 24, 1894
Creator: Lester, Frank
Partner: UNT Libraries Government Documents Department

Rotary Valve for Steam-Engines.

Description: Patent for a rotary valve for steam-engines that has a simplified valve and less pressure on the valve. It has a rocking valve that is "operating within a steam chest independent of the cylinder and connected therewith by pipes entering through the cylinder ends, a cam movement being provided for rocking the valve" (lines 21-25).
Date: September 18, 1894
Creator: Lester, Frank
Partner: UNT Libraries Government Documents Department

Port-Regulating Valve.

Description: Patent for a port-regulating valve. It is meant for use in steam-engines and regulates the steam in engines that the inventor had previously patented (No. 523,360). "The invention consists of a slide-valve for covering each port leading from the steam-chest to the rock-valve, with means for operating such slide-valves from the shaft controlling the rock-valve, and a link movement for adjusting the throw of the slide-valves and which is under the control of the engineer" (lines 21-28).
Date: August 27, 1895
Creator: Lester, Frank
Partner: UNT Libraries Government Documents Department

Switch.

Description: Patent for a switch for trolley lines that can be triggered from inside the trolley car.
Date: December 12, 1911
Creator: Torrence, Otis M.
Partner: UNT Libraries Government Documents Department

Rotary Churn.

Description: Patent for a manual rotary churn with two dasher blades, including instructions and illustrations.
Date: March 12, 1912
Creator: Martin, Harry T.
Partner: UNT Libraries Government Documents Department

Header Device.

Description: Patent for a header device intended for the cutting of maize, sorghum, kafir, and other crops so that the plant heads land on a header platform without too much stalk accompanying the head.
Date: July 21, 1914
Creator: Montgomery, Carroll Hinckley
Partner: UNT Libraries Government Documents Department