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High-energy-overcurrent protective device
Electrical loads connected to capitance elements in high voltage direct current systems are protected from damage by capacitance discharge overcurrents by connecting between the capacitance element and the load, a longitudinal inductor comprising a bifilar winding wound about a magnetic core, which forms an incomplete magnetic circuit. A diode is connected across a portion of the bifilar winding which conducts a unidirectional current only. Energy discharged from the capitance element is stored in the inductor and then dissipated in an L-R circuit including the diode and the coil winding. Multiple high voltage circuits having capacitance elements may be connected to loads through bifilar windings all wound about the aforementioned magnetic core.
Date:
May 18, 1981
Creator:
Praeg, W. F.
System:
The UNT Digital Library
Automatic Gun
Patent for an automatic gun which automatically sends the next cartridge to the gun barrel after firing.
Date:
May 18, 1909
Creator:
Lovelace, Charles D.
System:
The Portal to Texas History
Combination-Tool.
Patent for a combination tool "specifically adapted for use as a pan or plate lifter or a stove-lid lifter and which may also be used for holding dishes while being washed" (lines 4-7), including illustrations.
Date:
May 18, 1897
Creator:
Swenson, Charles E. & Swenson, Olive C.
System:
The Portal to Texas History
Ant-Trap.
Patent for a "trap designed to be placed around an ant-hill and adapted to capture ants leaving or returning to the ant-hill." (Lines 11-13) Includes instructions and illustrations.
Date:
May 18, 1897
Creator:
Bond, William Beebe
System:
The Portal to Texas History
Balance Staff and Wheel for Watches
Patent for an improved design of a balance staff and wheel used for watch repair. The new design allows for an easier repair when replacing a broken staff and decreases the chance that the wheel would be damaged when replacing the staff. Included are instructions and illustrations.
Date:
May 18, 1880
Creator:
Bugbee, George G.
System:
The Portal to Texas History
Car-Door Operating and Locking Device
Patent for a car door operating and locking device that provides improved means for automatically closing and locking the doors before starting the car.
Date:
May 18, 1915
Creator:
Pitts, Hood
System:
The Portal to Texas History
Animal Trap
Patent for an animal trap that can continue to trap more animals even after if traps one or more.
Date:
May 18, 1915
Creator:
Dennis, Decatur D.
System:
The Portal to Texas History
Buggy-Axle
Patent for a buggy-axle that has the hub of the wheel so arranged as to rotate with the stub axle of the device, holding the wheel in place.
Date:
May 18, 1915
Creator:
Elliott, Claude B. & Kurtz, Edward
System:
The Portal to Texas History
Bank-Check Writer.
Patent for a new and useful improvements in Bank-Check Writers. With this device, a blank check may be inserted and the name of the payee and the amount in figures will be typewritten.
Date:
May 18, 1920
Creator:
Wendelken, Charles
System:
The Portal to Texas History
Check-Writer.
Patent for an automatic bank check writer that will type out the name of the payee and other figures. Rotatable type cylinders, a foot presser, and additional adjustable character dials are included in the invention objects.
Date:
May 18, 1920
Creator:
Wendelken, Charles
System:
The Portal to Texas History
Car-Axle Lubricator
Patent for improving parts of the journal box in car axles to simplify construction and enable access to the interior of the journal box for replacement or otherwise.
Date:
May 18, 1920
Creator:
Urbeita, Jose M.
System:
The Portal to Texas History
Cold Process of Repairing Radiators of Internal-Combustion Engines.
Patent for repairing breaks in radiator pipes caused by freezing, by which can be repaired quickly and efficiently at a low cost.
Date:
May 18, 1920
Creator:
Henderson, Thomas E.
System:
The Portal to Texas History
Churn.
Patent for a churning receptacle for improvement in ease of operation, efficiency, and sanitation.
Date:
May 18, 1920
Creator:
Thompson, Robert A. & Morris, Lute P.
System:
The Portal to Texas History
Improvement in Plows.
Patent for "plow mold-boards to which the black land of Texas, and other similar soils, will not adhere, so that a furrow can be turned, however sticky and waxy the soil may be." (lines 14-18) including instructions and illustrations.
Date:
May 18, 1875
Creator:
Bell, Francis R.
System:
The Portal to Texas History
Wrench.
Patent for a new type of wrench.
Date:
May 18, 1915
Creator:
Bean, Jesse A.
System:
The Portal to Texas History
Wrist-Guide and Foot-Guard for Pianos.
Patent for “…a piano attachment consisting of an adjustable wrist-pin and foot-guard adapted to serve as a means for securing the proper position of the wrist and forearm in practice and also adapted to protect the front panel of the instrument and serve, with children, as a foot-rest. Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims” (lines 8-19).
Date:
May 18, 1897
Creator:
Norcross, Levi Watson
System:
The Portal to Texas History
Wagon Break
Patent for improvements in wagon-breaks, with the object of providing simple, effective, and durable means by which the breaks may be applied by either foot or hand power (lines 8-12). Additionally, provides "improved means for altering the power of the breaks" (lines 18-19).
Date:
September 18, 1888
Creator:
Baker, Owen T.
System:
The Portal to Texas History
Washing Machine.
Patent for a new and improved washing machine. This design consists in "[t]he combination, with the boiler having the transverse rollers, of the [other] roller having peripheral corrugations and the intermediate slots, the bail, and the counterweight whereby the roller may be balanced on the end wall of the boiler" (lines 85-90).
Date:
May 18, 1886
Creator:
Pinkerton, John Franklin
System:
The Portal to Texas History
Lens Mounting.
Patent for an improvement to spectacles to prevent lens breakage. The change to the design of the spectacles are mounts on the nose piece that attaches to the lenses, as well as mounts that attach to the temples of the spectacles and the lenses.
Date:
May 18, 1918
Creator:
Rees, Charles S.
System:
The Portal to Texas History
Machine for Picking Cotton.
Patent for an improved machine for picking cotton that is designed for the purpose of picking cotton fiber from the plants of the row. The machine is adapted to pass along over the row to extract the fiber from the bolls of the plants. The machine's provision allows for discharging the hairy tuft of the cotton seeds into elevating chutes so that the cotton seed can be discharged into a suitable receptacle mounted upon the framework of the machine.
Date:
May 18, 1920
Creator:
Threadgill, Wilmer
System:
The Portal to Texas History
Windmill.
Patent for an improved design for windmills that are in regular use. The design implements two sets of hinged vanes and uses weights to control the amount power that the windmill can generate. Included are instructions and illustrations.
Date:
May 18, 1880
Creator:
Rudolph, Calvin Foster
System:
The Portal to Texas History
Well-Reamer
Patent for an improved well-reamer with a more stable and supported cutters to straighten or increase the size of the hole with less damage from wear.
Date:
May 18, 1915
Creator:
Hughes, Howard R.
System:
The Portal to Texas History
Wax.
Patent for improving wax to be used by shoemakers consisting of gasolene [sic], rosin and pine tar. The improved wax adheres to the shoe leather and the threads making both the leather and the seams waterproof and more supple. This wax product does not blacken the hands of the shoemaker.
Date:
May 18, 1915
Creator:
Vest, Harvey P.
System:
The Portal to Texas History
Linter-Float-Driving Mechanism.
Patent for the improvement of the linter-float-driving mechanism of float drives for cotton linters. The invention produces a positive driving mechanism for a float and removes the use of a belt tightening idler.
Date:
May 18, 1915
Creator:
Stephens, Louis K.
System:
The Portal to Texas History