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Valve for explosive-engines.

Description: Patent for an improved valve for use in explosive engines which lists the movements of various parts in order to allow air and fuel to mix and explode.
Date: February 2, 1914
Creator: Ray, Albert J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Derailing Block dated October 1, 1918

Description: Patent for new and improved detailing rocks for railroads. What makes this unique is that the clamp can be quickly and effectively clamped to railroad tracks.
Date: February 19, 1918
Creator: Samuel Harvey Garrett & Joseph Owen Staude
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

[Letter to Gilbert Family]

Description: Photostatic copy of a typed letter from the United States Secretary of War, Henry Stimson, to Max Gilbert. The letter awards Gilbert's son, Harold Gilbert with a Purple Heart for his service, and it expresses Stimson's condolences for the death of Harold Gilbert.
Date: February 13, 1945
Creator: Stimson, Henry L. (Henry Lewis), 1867-1950
Item Type: Refine your search to only Letter
Partner: Fort Worth Jewish Archives

Wagon-Brake.

Description: Patent for an improvement in a wagon-brake using an operating-lever that is mounted in a bracket near the front axle, and consist of diverging arms; and a segmental rack-plate with teeth that is arranged to be engaged by a sliding pawl. When the operating-lever and the sliding pawl are connected; when the brake-bars are in motion, clamping the wheels of a vehicle thus making it stop.
Date: February 17, 1891
Creator: Baker, Owen T.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Well Drilling Machine.

Description: Patent for a driving mechanism to reduce the numbers of shafts and other parts needed for well drilling. The invention allows for one main driving shaft to be used as the primary source for well drilling.
Date: February 5, 1918
Creator: Herdman, Adam H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Walking-Cane.

Description: Patent for a walking cane which is made of two intertwined sections of spiral steel wires, which can be painted different colors creating a noticeable object that can be used by sports fans to show support for their team at games,
Date: February 1, 1910
Creator: Alverson, Lewis
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Tractor Turning Mechanism.

Description: Patent for a tractor turning mechanism that will allow tractors to turn at any angle up to a right angle by locking one of the driving ground wheels into a pivot point for the other wheels of the tractor.
Date: February 17, 1920
Creator: Chenoweth, William B.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Watchmaker's Tool.

Description: Patent for a watchmaker's tool that removes "the collet and hair spring of a watch from the balance wheel arbor, without injuring the hair spring of the watch and at the same time holding the balance wheel secure against accident or injury" (lines 10-14).
Date: February 12, 1895
Creator: Seyfriedt, William C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Stalk-Cutter.

Description: Patent for a rotary-blade stalk cutting machine. Includes instructions and illustrations.
Date: February 23, 1897
Creator: Evridge, George W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Hydrocarbon-Burner.

Description: Patent for "new and useful improvements in Hydrocarbon-Burners" (lines 6-7) including instructions and illustrations.
Date: February 10, 1920
Creator: Wynne, William P. & Wynne, James Harry
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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