Resource Type

Improvement in Baling-Presses. (open access)

Improvement in Baling-Presses.

Patent for a baling press "intended for compressing and re-pressing cotton for shipment" (para. 4), and is created using a "simple and efficient" (para. 2) design.
Date: November 27, 1877
Creator: Drake, John
System: The Portal to Texas History
Device for Preventing Overflow of Tanks. (open access)

Device for Preventing Overflow of Tanks.

Patent for preventing the "repeated discharge of the contents of a flush tank" (lines 10-11) and enhance overall utility that require a flush tank. Information and illustration provided.
Date: April 4, 1916
Creator: Logan, Paul H.
System: The Portal to Texas History
In-Situ Containment and Extraction of Volatile Soil Contaminants (open access)

In-Situ Containment and Extraction of Volatile Soil Contaminants

The invention relates to a novel approach to containing and removing toxic waste from a subsurface environment. More specifically the present invention relates to a system for containing and removing volatile toxic chemicals from a subsurface environment using differences in surface and subsurface pressures. The present embodiment generally comprises a deep well, a horizontal tube, at least one injection well, at least one extraction well and a means for containing the waste within the waste zone (in-situ barrier). During operation the deep well air at the bottom of well (which is at a high pressure relative to the land surface as well as relative to the air in the contaminated soil) flows upward through the deep well (or deep well tube). This stream of deep well air is directed into the horizontal tube, down through the injection tube(s) (injection well(s)) and into the contaminate plume where it enhances volatization and/or removal of the contaminants.
Date: December 27, 2005
Creator: Varvel, Mark Darrell
System: The UNT Digital Library