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Rotary Boring-Drill.
Patent for improvements in rotary boring drills. The invention provides a fluted drill collar for a drill bit designed to "break up the rock and other material tending to wedge in around the upper part of the head" (lines 19-21). The drill collar forms "a connection between the main rotary drill shaft and the drill bit" (lines 13-15).
Date:
January 28, 1919
Creator:
Hughes, Howard R.
System:
The Portal to Texas History
Scraper.
Patent for a scraper with interchangeable blades, which can be used "for glue joints, and... scraping molded surfaces" (lines 25-26) that includes instructions and illustrations.
Date:
January 28, 1919
Creator:
Hartmann, John H.
System:
The Portal to Texas History
Device for Controlling Electric Current.
Patent for an improved device for controlling electric current. The device can control electric current from a generator specifically for the use in automobiles not to exceed a certain limit in high speed situations.
Date:
January 28, 1919
Creator:
Duke, Earle H. & Brown, James D.
System:
The Portal to Texas History
Dental Occluding Frame
Patent for Dental Occluding Frame
Date:
January 28, 1914
Creator:
Hall, Rupert E.
System:
The Portal to Texas History
Switch-Hook
Patent for a switch lock which prevents "splitting" (line 13). Illustrations included.
Date:
January 28, 1908
Creator:
Tullock, John Thomas
System:
The Portal to Texas History