Window Screen Holder. (open access)

Window Screen Holder.

Patent for a new and improved window-screen holder. This design "consists in the combination, with a window-frame and a window-screen held in the same, of wires secured on the casing of the frame and having bends near their upper ends, and of hook-eyes held on the sides of the screen-frame and surrounding the wires. The invention also consists in a plate pivoted to the under side of the bottom rail of the screen-frame for covering a recess formed in the under edge and inner side of the said rail or piece" (lines 13-23).
Date: April 21, 1885
Creator: Barlow, Henry C.
Object Type: Patent
System: The Portal to Texas History
Strainer for Coffee-Pots, &c. (open access)

Strainer for Coffee-Pots, &c.

Patent for a strainer for coffee and tea strainers "so constructed as to be attachable in the lower end of the spout or body of the pot, as shown; and the object of my improvement is to construct a strainer to be removable, durable, of minimum cost, and perfect in its operation" (lines 13-18).
Date: April 21, 1896
Creator: McClellan, John A.
Object Type: Patent
System: The Portal to Texas History
Washing-Machine. (open access)

Washing-Machine.

Patent for improvements in washing-machines known as “roller and bed and it consists of a rubber-bed adapted to operate in conjunction with a rotatory rubber…….the bed being regulated by tightening screw-nuts upon the hooks which connect the springs with the end walls of said casing.” (Lines 13-22) Illustration is included.
Date: April 21, 1891
Creator: Wood, Commodore R.
Object Type: Patent
System: The Portal to Texas History
Whiffletree. (open access)

Whiffletree.

Patent for an improvement in whiffletrees, made out of steel. It includes a description and illustration.
Date: April 21, 1891
Creator: Flatau, Louis S.
Object Type: Patent
System: The Portal to Texas History
Derrick. (open access)

Derrick.

Patent for improvements in derricks or machines for hoisting heavy objects, which can be easily erected and operated; this device “can be manipulated with ease and by which the article being elevated or lowered may be changed in position without moving the support.” (Lines 20-23) Illustration is included.
Date: April 21, 1891
Creator: Lindsey, William E.
Object Type: Patent
System: The Portal to Texas History
Device for Cooling Milk and Butter. (open access)

Device for Cooling Milk and Butter.

Patent for improvements in devices for cooling milk and butter by using textile materials to cover the buckets or pails that contain milk or butter or other food articles, then saturated these textile covered buckets or pails with water; thus reducing the temperature of the articles contained in the buckets or pails, owing to evaporation. Illustration is included.
Date: April 21, 1891
Creator: Hall, Charles T.
Object Type: Patent
System: The Portal to Texas History
Texas Register, Volume 20, Number 30, Pages 2971-3065, April 21, 1995 (open access)

Texas Register, Volume 20, Number 30, Pages 2971-3065, April 21, 1995

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: April 21, 1995
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Jordan: Background and U.S. Relations (open access)

Jordan: Background and U.S. Relations

This report provides an overview of Jordanian politics and current issues in U.S.-Jordanian relations. It provides a brief discussion of Jordan's government and economy and of its cooperation in promoting Arab-Israeli peace and other U.S. policy objectives in the Middle East.
Date: April 21, 2011
Creator: Sharp, Jeremy M.
Object Type: Report
System: The UNT Digital Library
Coast Guard Polar Icebreaker Modernization: Background, Issues, and Options for Congress (open access)

Coast Guard Polar Icebreaker Modernization: Background, Issues, and Options for Congress

This report provides background information and issues for Congress on the modernization of the Coast Guard's polar icebreaker fleet, which performs a variety of missions supporting U.S. interests in polar regions.
Date: April 21, 2011
Creator: O'Rourke, Ronald
Object Type: Report
System: The UNT Digital Library
United Nations System Efforts to Address Violence Against Women (open access)

United Nations System Efforts to Address Violence Against Women

This report provides an overview of recent U.N. efforts to address VAW and highlights key U.N. interagency efforts. It also discusses selected U.N. funds, programs, and agencies that address international violence against women. It does not assess the extent to which VAW is directly addressed or is part of a larger initiative or program.
Date: April 21, 2011
Creator: Blanchfield, Luisa
Object Type: Report
System: The UNT Digital Library
Navy Virginia (SSN-774) Class Attack Submarine Procurement: Background and Issues for Congress (open access)

Navy Virginia (SSN-774) Class Attack Submarine Procurement: Background and Issues for Congress

This report provides background information and oversight issues for Congress on the Virginiaclass nuclear-powered attack submarine (SSN) program. The Navy's proposed FY2012 budget requests procurement funding for the 15th and 16th Virginia-class boats, and advance procurement (AP) funding for Virginia-class boats to be procured in future years. Decisions that Congress makes on procurement of Virginia-class boats could substantially affect U.S. Navy capabilities and funding requirements, and the U.S. shipbuilding industrial base.
Date: April 21, 2011
Creator: O'Rourke, Ronald
Object Type: Report
System: The UNT Digital Library
The Proposed U.S.-Panama Free Trade Agreement (open access)

The Proposed U.S.-Panama Free Trade Agreement

This report presents a summary of trade negotiations and the proposed U.S.-Panama free trade agreement (FTA). The proposed U.S.-Panama FTA is a comprehensive agreement. Some 88% of U.S. commercial and industrial exports would become duty-free upon implementation, with remaining tariffs phased out over a 10-year period.
Date: April 21, 2011
Creator: Hornbeck, J. F.
Object Type: Report
System: The UNT Digital Library
The New START Treaty: Central Limits and Key Provisions (open access)

The New START Treaty: Central Limits and Key Provisions

The United States and Russia signed a new strategic arms reduction treaty - known as New START - on April 8, 2010. This treaty is designed to replace the 1991 Strategic Arms Reductions Treaty (START), which expired, after 15 years of implementation, on December 5, 2009. This report provides an overview of New START, including a comparison to the original START Treaty, the belief of the Obama Administration and outside analysts that New START will enhance U.S. national security, and the criticisms of those who say that New START (and, indeed, the entire issue of U.S.-Russian arms control) is a distraction from more important items on the nonproliferation agenda.
Date: April 21, 2011
Creator: Woolf, Amy F.
Object Type: Report
System: The UNT Digital Library
Conventional Prompt Global Strike and Long-Range Ballistic Missiles: Background and Issues (open access)

Conventional Prompt Global Strike and Long-Range Ballistic Missiles: Background and Issues

Prompt global strike (PGS) would allow the United States to strike targets anywhere on earth with conventional weapons in as little as an hour. This report provides an overview of the rationale for the PGS mission and the possible deployment of conventional warheads on long-range ballistic missiles in support of this mission. It then reviews the Air Force and Navy efforts to develop these systems. It summarizes congressional reaction to these proposals, then provides a more detailed account of the issues raised by these concepts and programs.
Date: April 21, 2011
Creator: Woolf, Amy F.
Object Type: Report
System: The UNT Digital Library
Federal Register, Volume 76, Number 77, April 21, 2011, Pages 22293-22602 (open access)

Federal Register, Volume 76, Number 77, April 21, 2011, Pages 22293-22602

Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.
Date: April 21, 2011
Creator: United States. Office of the Federal Register.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Texas Register, Volume 17, Number 29, Pages 2821-2897, April 21, 1992 (open access)

Texas Register, Volume 17, Number 29, Pages 2821-2897, April 21, 1992

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: April 21, 1992
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Federal Register, Volume 75, Number 76, April 21, 2010, Pages 20771-20894 (open access)

Federal Register, Volume 75, Number 76, April 21, 2010, Pages 20771-20894

Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.
Date: April 21, 2010
Creator: United States. Office of the Federal Register.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Performance of Experimental Turbojet-Engine Combustor 1: Performance of a One-Eighth Segment of an Experimental Turbojet-Engine Combustor (open access)

Performance of Experimental Turbojet-Engine Combustor 1: Performance of a One-Eighth Segment of an Experimental Turbojet-Engine Combustor

Report presenting an investigation of a one-eighth segment of an annular combustor suitable for use as a component of an experimental turbojet engine. Due to the small space available for the combustor, a special design involving a minimum of obstructions in the combustion chamber was created. Results regarding the temperature-rise efficiency, total-pressure loss, and exhaust-gas temperature variation for several simulated engine operating conditions are provided.
Date: April 21, 1948
Creator: Hill, Francis U. & Mark, Herman
Object Type: Report
System: The UNT Digital Library
Aerodynamic characteristics of a wing with quarter-chord line swept back 35 degrees, aspect ratio 4, taper ratio 0.6, and NACA 65A006 airfoil section: Transonic-bump method (open access)

Aerodynamic characteristics of a wing with quarter-chord line swept back 35 degrees, aspect ratio 4, taper ratio 0.6, and NACA 65A006 airfoil section: Transonic-bump method

From Introduction: "This paper presents the results of the investigation of wing-alone and wing-fuselage combinations employing a wing with the quarter-chord line swept back 35^o, aspect ratio 4, taper ratio 0.6, and NACA 65A006 airfoil section."
Date: April 21, 1949
Creator: Sleeman, William C., Jr. & Becht, Robert E.
Object Type: Report
System: The UNT Digital Library
Maximum-Lift Investigation of a 1/40-Scale X-1 Airplane Wing at Mach Numbers From 0.60 to 1.15 (open access)

Maximum-Lift Investigation of a 1/40-Scale X-1 Airplane Wing at Mach Numbers From 0.60 to 1.15

Report presenting an investigation at transonic speeds to determine the maximum lift characteristics of a wing model of the X-1 airplane. Lift, drag, and pitching-moment data for a lift range and range of Mach numbers was collected. Maximum lift was found to be obtained at progressively higher angles of attack as the Mach number was increased.
Date: April 21, 1950
Creator: Turner, Thomas R.
Object Type: Report
System: The UNT Digital Library
Effect of Various Blade Modifications on Performance of a 16-Stage Axial-Flow Compressor 5 - Effect on Over-All Performance Characteristics of a 20-Percent Reduction in Solidity of the Fourteenth Through Sixteenth Stage Rotors (open access)

Effect of Various Blade Modifications on Performance of a 16-Stage Axial-Flow Compressor 5 - Effect on Over-All Performance Characteristics of a 20-Percent Reduction in Solidity of the Fourteenth Through Sixteenth Stage Rotors

The performance of a 16-stage axial-flow compressor, in which the mean-radius solidity was reduced from 1.28 to 1.02 in the fourteenth through sixteenth stage rotors was determined. The performance of this modification was compared with that of the compressor with original rotors. The reduced solidity resulted in slightly improved performance.
Date: April 21, 1952
Creator: Medeiros, Arthur A. & Hatch, James E.
Object Type: Report
System: The UNT Digital Library
Component Operating Trends During Acceleration and Deceleration of Two Hypothetical Two-Spool Turbojet Engines (open access)

Component Operating Trends During Acceleration and Deceleration of Two Hypothetical Two-Spool Turbojet Engines

Memorandum presenting an investigation of the compressor and turbine operating trends during acceleration and deceleration of two hypothetical two-spool turbojet engines. The two engines have the same component performance maps but the arbitrarily specified ratio of outer- to inner-spool moment of inertia for the second engine is 4 times that specified for the first engine. Results regarding the acceleration characteristics and deceleration characteristics are provided.
Date: April 21, 1955
Creator: Dugan, James F., Jr.
Object Type: Report
System: The UNT Digital Library
Flight Tests to Determine the Drag of Fin-Stabilized Parabolic Bodies at Transonic and Supersonic Speeds (open access)

Flight Tests to Determine the Drag of Fin-Stabilized Parabolic Bodies at Transonic and Supersonic Speeds

Report presenting testing on parabolic bodies of revolution of two fineness ratios in the transonic and supersonic range. One had a body fineness ratio of 7.87 and one had a ratio of 12 and were tested under different Mach number ranges. Experimental results and drag estimates of various portions of the body are provided.
Date: April 21, 1948
Creator: Alexander, Sidney R.; Chauvin, Leo T. & Rumsey, Charles B.
Object Type: Report
System: The UNT Digital Library
An Analysis of Pressure Studies and Experimental and Theoretical Downwash and Sidewash Behind Five Pointed-Tip Wings at Supersonic Speeds (open access)

An Analysis of Pressure Studies and Experimental and Theoretical Downwash and Sidewash Behind Five Pointed-Tip Wings at Supersonic Speeds

The following report covers an investigation that was done to supplement available experimental data on flow fields behind wings of an aircraft at supersonic speeds, as well as to furnish more quantitative information on the choice of the theoretical method for a given configuration and the accuracy to be expected when using such a method.
Date: April 21, 1954
Creator: Boatright, William B.
Object Type: Report
System: The UNT Digital Library