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Automatic voltage-imbalance detector (open access)

Automatic voltage-imbalance detector

A device is described for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.
Date: May 20, 1981
Creator: Bobbett, R. E.; McCormick, J. B. & Kerwin, W. J.
System: The UNT Digital Library
Improved solvent extraction recovery of shale oil. [DOE patent application] (open access)

Improved solvent extraction recovery of shale oil. [DOE patent application]

An improved process for solvent extraction of organic matter from shale by two extraction steps in sequence. The extraction steps are: (1) treating a kerogen-containing shale with a solvent system comprising a combination of water and an alcohol at a temperature of about 375 to 425/sup 0/C; and (2) treating the product of (1) with a solvent system comprising a combination of an alcohol and another organic solvent at an elevated temperature, but not above about 425/sup 0/C. The organic matter is recovered by separating the liquid which results from step (2) from the shale solids.
Date: July 20, 1981
Creator: McKay, John F. & Chong, Shuang-Ling
System: The UNT Digital Library
Method of Regulating Growth (open access)

Method of Regulating Growth

Patent for a method of regulating growth. This is new method of regulating the growth of the roots of trees, plants, and shrubbery.
Date: October 20, 1903
Creator: Risien, Edmund E.
System: The Portal to Texas History
Harvester (open access)

Harvester

Patent for a harvester. Illustration included.
Date: June 20, 1905
Creator: Lampton, Flavius J. & Thompson, J. H.
System: The Portal to Texas History
Drawers-Supporter. (open access)

Drawers-Supporter.

Patent for a new and useful drawers supporter, including instructions and illustrations.
Date: September 20, 1898
Creator: James, Thomas S.
System: The Portal to Texas History
Railway-Gate (open access)

Railway-Gate

Patent for a railway gate that can be operated from a distance. Illustrations included.
Date: April 20, 1909
Creator: Buchannan, Edward M.
System: The Portal to Texas History
Closet-Flushing Mechanism. (open access)

Closet-Flushing Mechanism.

Patent for a water closet flushing mechanism, which prevents the water from standing in the toilet bowl where it is liable to freeze in cold weather.
Date: June 20, 1911
Creator: Parker, Thomas H.
System: The Portal to Texas History
Automobile Torpedo (open access)

Automobile Torpedo

Patent for a shell torpedo launcher for submarines.
Date: December 20, 1910
Creator: Douglas, William M.
System: The Portal to Texas History
Baling-Press (open access)

Baling-Press

Patent for improvements in the specifics of the design and construction of a baling press.
Date: August 20, 1901
Creator: Chapman, Robert E.
System: The Portal to Texas History
Cotton-Press. (open access)

Cotton-Press.

Patent for new and useful improvements in cotton presses, including instructions and illustrations.
Date: December 20, 1898
Creator: Mason, William R.
System: The Portal to Texas History
Buggy Wrench (open access)

Buggy Wrench

Patent for a buggy wrench. Illustration included.
Date: September 20, 1904
Creator: Ware, Richard M. & Carroll, James Malcum
System: The Portal to Texas History
Harrow Attachment for Cultivators. (open access)

Harrow Attachment for Cultivators.

Patent for a harrow attachment that permits the attachment to be held with its teeth disposed in any desired relation to the cultivator.
Date: February 20, 1912
Creator: Wynne, Robert S.
System: The Portal to Texas History
Riding Attachment For One-Row Walking Grain and Seed Planters (open access)

Riding Attachment For One-Row Walking Grain and Seed Planters

Patent for a riding attachment. This invention is designed for a one-row walking planter. Illustration included.
Date: November 20, 1906
Creator: Fisk, John
System: The Portal to Texas History
Window-Sash. (open access)

Window-Sash.

Patent for a window sash with metal guides, which hold the window sash in place without the use of other holding devices.
Date: October 20, 1908
Creator: Holbrook, Milo Franklin
System: The Portal to Texas History
Lint-Cotton Feeder (open access)

Lint-Cotton Feeder

Patent for the collection of cotton, monitoring the amount of cotton lint being received, creating certain actions when those amounts are reached, including detailed instructions and illustrations.
Date: October 20, 1904
Creator: Hague, James Arthur
System: The Portal to Texas History
Base for Columns (open access)

Base for Columns

Patent for a base for columns which drains water away from the base.
Date: September 20, 1910
Creator: Riley, Samuel L.
System: The Portal to Texas History
Fertilizer-Distributer. (open access)

Fertilizer-Distributer.

Patent for a fertilizer-distributer with "means for agitating and loosening up the fertilizing material and delivering the same through a series of discharge-openings, such series extending transversely of the path of movement of the machine across the field and controlled by individual and independently-operable feed slides or gates, whereby the machine may be used for simultaneously fertilizing adjoined furrows or as a broadcast fertilizer-distributer" (Lines 12-21).
Date: May 20, 1902
Creator: Mize, William P.
System: The Portal to Texas History
Cotton-Gin Attachment (open access)

Cotton-Gin Attachment

Patent for an attachment to be used as a chute for cotton gins. Illustrations included.
Date: April 20, 1909
Creator: Story, Henton L.
System: The Portal to Texas History
Aseptic Fountain Syringe or Irrigator (open access)

Aseptic Fountain Syringe or Irrigator

Patent for an aseptic fountain syringe or irrigator for use by doctors that is easily cleaned and portable.
Date: February 20, 1912
Creator: Leach, Shirley N.
System: The Portal to Texas History
Gate (open access)

Gate

Patent for a gate. Illustration included.
Date: September 20, 1904
Creator: Penn, George Rollins
System: The Portal to Texas History
Cooking Utensil. (open access)

Cooking Utensil.

Patent for an improved steam-cooker in which different kinds of food can be simultaneously cooked in separate containers. Individual cooking vessels are removable from the steam-cooker.
Date: November 20, 1906
Creator: Daniels, Laura E.
System: The Portal to Texas History
Device for Making Castings. (open access)

Device for Making Castings.

Patent for "making castings of various kinds, and more especially for making castings for dental use" (lines 10-12) including illustrations.
Date: April 20, 1909
Creator: Davison, Hugh M. ; H. M. Davison
System: The Portal to Texas History
Boiler-Feed Regulator. (open access)

Boiler-Feed Regulator.

Patent for a new and useful boiler feed regulator, including instructions and illustrations.
Date: September 20, 1898
Creator: Mitchell, Charles Bradley
System: The Portal to Texas History
Utilizing Sulfur-Containing Petroleum (open access)

Utilizing Sulfur-Containing Petroleum

Patent for utilizing the sulfur content in petroleum obtained from oil. Illustrations included,
Date: February 20, 1912
Creator: Eggleston, John E.
System: The Portal to Texas History