Combined Harrow and Roller (open access)

Combined Harrow and Roller

Patent for a combined harrow and roller for pulverizing and eliminating unwanted growth from the ground. Illustrations included.
Date: April 9, 1912
Creator: Younger, Walter E.
System: The Portal to Texas History
Improvement In Percussion-Shells. (open access)

Improvement In Percussion-Shells.

This patent was created for individuals to be able to hit an object with the instrument and the oject immediately explodes on impact. It then produces an excessive amount of explosions. The invention is made out of shells with sections assembled together infused with different substances, and connected by a fuse.
Date: April 9, 1878
Creator: Urquhart, John M.
System: The Portal to Texas History
Electrical Apparatus for Heating Stills, Boilers, and the Like. (open access)

Electrical Apparatus for Heating Stills, Boilers, and the Like.

Patent for "Improvements in Electrical Apparatus for Heating Stills, Boilers, and the like" (lines 6-8) that uses electricity and includes "a heating element which is not affected by repeated changes in temperature, which is adapted to present a heating surface of large area, which may be raised to a high temperature with a low current, and which is many times more economical in use than metal coils possessing less heat radiating powers" (lines 21-28) including illustrations.
Date: April 9, 1918
Creator: Lorenz, Charles O.
System: The Portal to Texas History
Oil Burner (open access)

Oil Burner

Patent for an improvement on Oil Burners.
Date: April 9, 1902
Creator: Robertson, George
System: The Portal to Texas History
Door Stop and Lock. (open access)

Door Stop and Lock.

Patent for a door lock and door stop that is operated from the doorknob by having a rod with a bolted door stop box on the bottom inserted into the door frame.
Date: April 9, 1907
Creator: Tatum, Cicero James
System: The Portal to Texas History