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Well Cleaning Device

Description: Patent for a device to clean a well to prevent pumps from being clogged.
Date: October 7, 1913
Creator: Kilburn, John Franklin
Partner: UNT Libraries Government Documents Department

Projecting-Machine.

Description: Patent for improvements to a projector that relate to advertising. The inventor references adjustments to a previous patent, No. 1069521 from August 5, 1913. Adjustments include making the device more accurate and reliable, and to adapt it to be able to display opaque surfaces, postcards, and other printed items during any time of day. Additionally, the revoluble slide magazine has a mechanism that allows it to operate continuously without assistance from the operator.
Date: October 7, 1919
Creator: Bernard, Oscar C.
Partner: UNT Libraries Government Documents Department

Rail-Fastening Device

Description: Patent for a rail fastening device that can be used on various materials and does not require the use of bolts or screws.
Date: March 7, 1911
Creator: Bergen, James V.
Partner: UNT Libraries Government Documents Department

Pulverizing or Grinding Machine

Description: Patent for an improved, efficient pulverizing or grinding machine. Primarily used for pulverizing or grinding limestone and used is assistance with manufacturing cement, this improved machine focuses on a larger output through improvements in the cycling of surplus air.
Date: April 7, 1914
Creator: Steckle, Edward J.
Partner: UNT Libraries Government Documents Department

Automatic Train Stop

Description: Patent for train signal to indicate it will stop.
Date: November 7, 1916
Creator: Bulla, Melbern B.
Partner: UNT Libraries Government Documents Department

Automatic Train Stop

Description: Patent for Automatic Train-stop
Date: November 7, 1916
Creator: Bulla, Melbern B.
Partner: UNT Libraries Government Documents Department

Grade-Indicator.

Description: Patent for a grade indicator designed for land, air, and sea vehicles. It provides both lateral and longitudinal inclination with a simple construction.
Date: January 7, 1919
Creator: Shemeley, Jesse B. & Shemeley, Marion E.
Partner: UNT Libraries Government Documents Department

Sleeping-Car

Description: Patent for a railroad sleeping car with an improved mechanism for folding the seats into beds.
Date: February 7, 1911
Creator: Anson, Warren J.
Partner: UNT Libraries Government Documents Department

Cab-Signal and Automatic Stop

Description: Patent for a cab-signal and automatic stop that "relates to railway safety appliances and has particular reference to signals carried preferably within the locomotive cab." (lines 9-12) includes instruction and illustrations.
Date: November 7, 1916
Creator: Bulla, Melbern Bernie
Partner: UNT Libraries Government Documents Department

Caustic-Soda Process.

Description: Patent for mixing anhydrous sodium-sulfate with saw dust, heating the mixture in a furnace to 880 degrees Celsius and letting it partially cool. This process will convert the sodium-sulfate to sodium sulfide which when combined with the saw dust creates a liquid which will not oxidize because of the saw dust. The saw dust prevents the mixture from becoming volatile. When lime is added to the mixture then caustic soda is created.
Date: September 7, 1915
Creator: Hirt, Jules Hector
Partner: UNT Libraries Government Documents Department
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