Tank-Bottom Holder. (open access)

Tank-Bottom Holder.

Patent for a tank bottom holder that allows a tank bottom to be "securely and accurately maintained in proper cooperative relation to the edge turning tool and readily manipulated in the required manner" (lines 13-17). That tank bottom holder can be adjusted to fit a variety of tank bottom sizes, and the patent includes illustrations and instructions.
Date: August 11, 1914
Creator: Smith, Walter O.
System: The Portal to Texas History
Cotton-Bur Separator. (open access)

Cotton-Bur Separator.

Patent for improvements in apparatus for separating burs from cotton lint despite severe weather conditions, illustrations included.
Date: August 20, 1918
Creator: Irwin, Samuel D.
System: The Portal to Texas History
Vaporizing Attachment for Internal-Combustion Engines. (open access)

Vaporizing Attachment for Internal-Combustion Engines.

Patent for a vaporizing attachment for internal combustion engines which provides means for vaporizing and introducing liquid fuel into the cylinders while the motor is in motion.
Date: January 7, 1919
Creator: Irwin, Herbert G.
System: The Portal to Texas History
Vacuum-Operated Make-And-Break Spark Plug (open access)

Vacuum-Operated Make-And-Break Spark Plug

Patent for an improved "vacuum operated make and break spark plug" (lines 16-17) including illustrations.
Date: November 19, 1918
Creator: Irwin, Herbert G.
System: The Portal to Texas History
Vacuum-Energized Make-and-Break Spark-Plug. (open access)

Vacuum-Energized Make-and-Break Spark-Plug.

Patent for a vacuum-energized make-and-break spark plug that "relates to new and useful improvements in ignition apparatus for internal combustion engines" (lines 16-18) including instructions and illustrations.
Date: June 4, 1918
Creator: Irwin, Herbert Glen
System: The Portal to Texas History
Vacuum-Operated Make-and-Break Spark-Plug. (open access)

Vacuum-Operated Make-and-Break Spark-Plug.

Patent for simple and efficient improvements to vacuum-operated make-and-break spark plugs, including illustrations and instructions.
Date: June 10, 1919
Creator: Irwin, Herbert Glen
System: The Portal to Texas History
Device For Cleaning Electrodes Of Make-And-Break Spark-Plugs. (open access)

Device For Cleaning Electrodes Of Make-And-Break Spark-Plugs.

Patent for improvements in cleaning the electrodes of make and break spark plugs, with an illustration and explanation.
Date: August 6, 1918
Creator: Irwin, H. G.
System: The Portal to Texas History