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Rotary Boring-Drill.
Patent for improvements to rotary boring drills that enable a drill to be assembled and disassembled without a tool and that ensure the removable cutters do not come off during operation.
Date:
June 26, 1917
Creator:
Hughes, Howard R.
System:
The Portal to Texas History
Incandescent Hydrocarbon-Lamp.
Patent for "a new and useful incandescent hydrocarbon-lamp employing an easily-evaporated oil for fuel which transformed into gas before burning." (lines 5-10) including instructions and illustrations.
Date:
June 26, 1900
Creator:
Yorty, Henry Harrison & Purdy, John S.
System:
The Portal to Texas History