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3 Matching Results
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Drift Valve.
Patent for a drift valve for locomotive engines to effect automatic diversion of exhaust steam from the air pump to the smoke box, after the steam from the main throttle has been shut off.
Date:
January 3, 1922
Creator:
Gilman, Benoist P.
System:
The Portal to Texas History
Tool for Unscrewing Pipe-Joints from Wells
Patent for "new and useful Improvements in Tools for Unscrewing Pipe-Joints from Wells" (lines 5-6). "The object of the invention is to provide a device... whereby the joints of pipe that have become stuck in the well may be unscrewed and withdrawn" (lines 12-16).
Date:
September 3, 1918
Creator:
Matula, Joseph R.
System:
The Portal to Texas History
Buckle.
Patent for a new and improved buckle. This design utilizes two separate tongues that run freely along a middle bar, which lengthens the life of the strap by distributing pressure and allowing for broken out, frayed, or otherwise worn holes to be circumvented for new ones.
Date:
May 3, 1881
Creator:
Burket, John
System:
The Portal to Texas History