Resource Type

Language

Reduction of B-Integral Accumulation in Lasers (open access)

Reduction of B-Integral Accumulation in Lasers

A pulsed laser is provided wherein the B-integral accumulated in the laser pulse is reduced using a semiconductor wafer. A laser pulse is generated by a laser pulse source. The laser pulse passes through a semiconductor wafer that has a negative nonlinear index of refraction. Thus, the laser pulse accumulates a negative B-integral. The laser pulse is then fed into a laser amplification medium, which has a positive nonlinear index of refraction. The laser pulse may make a plurality of passes through the laser amplification medium and accumulate a positive B-integral during a positive non-linear phase change. The semiconductor and laser pulse wavelength are chosen such that the negative B-integral accumulated in the semiconductor wafer substantially cancels the positive B-integral accumulated in the laser amplification medium. There may be additional accumulation of positive B-integral if the laser pulse passes through additional optical mediums such as a lens or glass plates. Thus , the effects of self-phase modulation in the laser pulse are substantially reduced.
Date: June 5, 1998
Creator: Meyerhofer, David D. & Konoplev, Oleg A.
System: The UNT Digital Library
Baling-Press (open access)

Baling-Press

Patent for bailing press including improvements in the compressor, feeder, and plunger-actuating mechanisms.
Date: June 5, 1917
Creator: North, George W.
System: The Portal to Texas History
Cotton Gin. (open access)

Cotton Gin.

Patent for improvements in cotton gins, including "an attachment for a gin feeder to separate cotton from the burs during the gin operation...especially adapted for use upon cotton containing an excess amount of bolls" (lines 13-16). The improvements include an air suction device to remove cotton from the burs before it enters the gin.
Date: June 5, 1917
Creator: Huntsman, Edward L.
System: The Portal to Texas History
Flexible Conduit. (open access)

Flexible Conduit.

Patent for flexible conduits that posses maximum strength, resilience, and flexibility that extend the life of dredge sleeves, couplings and other capacities.
Date: June 5, 1917
Creator: Johnson, Charles A.
System: The Portal to Texas History
Gas-Meter Attachment. (open access)

Gas-Meter Attachment.

Patent for a gas meter attachment that work with sliding valves to operate the mechanism that measures the gas allowed to pass through the meter.
Date: June 5, 1917
Creator: Morris, Henry C.
System: The Portal to Texas History
Gas-Meter-Valve Protector (open access)

Gas-Meter-Valve Protector

Patent for an attachment for gas or fluid meters that uses the sliding valve principle. Improvments upon valve covers so that they are more firmly attached.
Date: June 5, 1917
Creator: Emerson, Bennett
System: The Portal to Texas History
Gearing for Hoisting Apparatus (open access)

Gearing for Hoisting Apparatus

Patent for gearing that hoists items in construction. This one is designed more specifically with the drilling of wells in mind, but it can be used in other activities as well. The apparatus can run at varying speeds, all controlled by a single person who does not have to leave the controls to adjust said speed.
Date: June 5, 1917
Creator: Black, Lee Jackson
System: The Portal to Texas History
Pumping-Engine. (open access)

Pumping-Engine.

Patent for a pumping engine that pumps air, water, oil, or other agents. It was designed to be used for air pumps on locomotives, inflating tires on automobiles, pumping water in steam operated machines, and other uses.
Date: June 5, 1917
Creator: Allison, Jesse H.
System: The Portal to Texas History
Railway-Tie. (open access)

Railway-Tie.

Patent for an invention relating to the railway tie that aims to produce "a tie which is adapted to be constructed of reinforced concrete" (lines 14-16). Other objectives and illustrations of invention are included.
Date: June 5, 1917
Creator: Shearer, Frederick C.
System: The Portal to Texas History
Rocking-Chair Clamp (open access)

Rocking-Chair Clamp

Patent for converting standard chairs into rocking chairs, including illustrations.
Date: June 5, 1917
Creator: Bell, Silas, D.
System: The Portal to Texas History
Safety-Lamp. (open access)

Safety-Lamp.

Patent for a safety lamp that prevents the explosion of combustible gases by adding a perforated dome and air chamber. The expansion spaces cut off the air supply and extinguish the lamp.
Date: June 5, 1917
Creator: Kincade, Elmer C.
System: The Portal to Texas History
Tie-Up Stand for Mail. (open access)

Tie-Up Stand for Mail.

Patent for the tying of mail into bundles. The invention is adjustable and allows for mail of various widths.
Date: June 5, 1917
Creator: Zerwer, John A.
System: The Portal to Texas History
Motor. (open access)

Motor.

Patent for improvements in motors designed for motor-vehicle operation. Cheaper manufacture and less expensive fuel are included as claimed improvements.
Date: June 5, 1916
Creator: Edwards, Charles R.
System: The Portal to Texas History
Pump. (open access)

Pump.

Patent for a pump design that allows for the pump barrel to be securely locked in position in the well and easily released again when the parts need to be removed again.
Date: June 5, 1916
Creator: Ligon, Arthur Lee
System: The Portal to Texas History
Coin Holding Post Card (open access)

Coin Holding Post Card

Patent for a postcard that hold coins. This can be used to transport or collect coins.
Date: June 5, 1914
Creator: Bedinger, S. B.
System: The Portal to Texas History
End Gate Fastener (open access)

End Gate Fastener

Patent for improvements to end gate fasteners to improve removal, and provide a simple, well constructed end gate fastener, including illustrations.
Date: June 5, 1913
Creator: Nichols, George Thomas
System: The Portal to Texas History
Acetylene-Gas Generator. (open access)

Acetylene-Gas Generator.

Patent for an acetylene-gas generator that provides an apparatus in which the parts may be readily detached for convenience in making repairs.
Date: June 5, 1908
Creator: Carl, Reinhold A.
System: The Portal to Texas History
Bedstead (open access)

Bedstead

Patent for a bedstead that holds a bottom sheet taunt that can be used with existing bedsteads.
Date: June 5, 1906
Creator: Whitlow, W. Jidy
System: The Portal to Texas History
Nailless Horseshoe (open access)

Nailless Horseshoe

Patent for horseshoe with extended sides that will bend inward to fit the shape of the horse hoof and that will be secured by screwing on nuts to pre-attached bolts on ears pressed against the hoof. Invention is a light and adjustable shoe that can be put on without the use of nails and can be removed at any time.
Date: June 5, 1906
Creator: King, Alphonse
System: The Portal to Texas History
Rotary Engine. (open access)

Rotary Engine.

Patent for rotary engine "of simple and compact construction, in which the pressure and expansive force of the steam or other actuating fluid may be utilized to the fullest advantage" (lines 10-13), with illustrations.
Date: June 5, 1906
Creator: Cagle, Carter M.
System: The Portal to Texas History
Well-Drilling Apparatus (open access)

Well-Drilling Apparatus

Patent for a well-drill swivel designed to improve the function of a well-drilling apparatus. The improved swivel is meant to create a better connection between rod and rope and prevent twisting of water-supply.
Date: June 5, 1906
Creator: Hall, Samuel N.
System: The Portal to Texas History
Cotton-Stalk Knocker. (open access)

Cotton-Stalk Knocker.

Patent for improvements in cotton-stalk knockers. This invention "relates to cotton-knockers, and more particularly to a device of this class which may be readily attached to or combined with a wheeled cultivator of usual form" (lines 11-14). Includes specifications and illustrations.
Date: June 5, 1900
Creator: Chitty, Robert Henry
System: The Portal to Texas History
Hame-Hook. (open access)

Hame-Hook.

Patent for "a new and useful invention of hame-hook that can be easily and quickly applied to harness-hame." (line 5-10) including instructions and illustrations.
Date: June 5, 1900
Creator: Plumhoff, Edward
System: The Portal to Texas History
Piano. (open access)

Piano.

Patent for a new piano "in which the strings are vibrated through the medium of a bow, as in a violin, instead of being struck with hammers in accordance with the usual method" (lines 8-12), including illustrations.
Date: June 5, 1900
Creator: Holcombe, Edgar L.
System: The Portal to Texas History