UNT Libraries Government Documents Department - 1,371 Matching Results

Search Results

Results: 1 - 24 next
open access

Injury Experience in the Coking Industry, 1951

Description: From Introduction and Summary: "Reports from operating companies showed that 25,715 men worked at coke ovens in 1951, about 6 percent more than were employed in 1950 and, except in 1943, the largest work force since 1930, when 28,139 men were employed. The work time for all employees was 70,190,493 man-hours. The returns indicated an average of 344 work days per man as compared with 341 days in the previous year. Accidents at the ovens resulted in the death of 10 and injury to 768 workers, both… more
Date: 1954
Creator: Reese, Seth T.; Kearney, Naomi W. & Miller, Elizabeth A.
Item Type: Refine your search to only Report
open access

Coal-Mine Bumps: Some Aspects of Occurence, Cause and Control

Description: From Introduction: "The purpose of this report is to analyze the coal-mine bumps that have occurred on pillar lines during the past 25 years in the hope that the analyses and the conclusions drawn will aid mining engineers and other mine officials in improving layouts and face mining methods in mines where bumps reasonably may be expected to occur."
Date: 1954
Creator: Holland, Charles T. & Thomas, Edward
Item Type: Refine your search to only Report
open access

Carbonizing Properties of American Coals: Index of Coals Tested by the Bureau of Mines

Description: Introduction; "The purpose of this paper is to present in collected and sequential form such a list of the coals that have been studied in the carbonization-section labatories of the Bureau of Mines for their carbonizing properties and yields of coke and coal chemicals."
Date: 1954
Creator: Brown, R. L.; Davis, J. D.; Reynolds, D. A. & Smith, F. W.
Item Type: Refine your search to only Report
open access

Flood Prevention in Anthracite Mines, Northern Field: Anthracite Region of Pennsylvania, Project Number 1 (Lackawanna)

Description: From Scope of Report: "The report covers the following: (a) A brief description of the proposed Conowingo tunnel system, which will drain the anthracite mines of Pennsylvania into the Susquehanna River at Conowingo. Md.; (b) economic development of the Northern field and the improvements desired; (c) geology and hydrology of the Northern field; (d) the basic problem, plans, and costs of Project No.1 (Lackawanna) ; (e) economic analysis and justification of the project; and (f) final recommendat… more
Date: 1954
Creator: Ash, S. H. (Simon Harry), b. 1889; Dierks, H. A.; Kynor, H. D.; Lesser, W. H.; Miller, P. S. & Romischer, W. M.
Item Type: Refine your search to only Report
open access

Injury Experience in Coal Mining, 1950: Analysis of Mine Safety Factors, Related Employment, and Production Data

Description: From Introduction: "Data on the injury experience at coal mines in the United States in this bulletin are presented in two section sections. General and detailed data on the 1950 safety record at bituminous-coal, lignite, and Pennsylvania anthracite mines, separately an combined are included in the first section. The second section contains certain historical injury statistics at all coal mines from the earliest available data through 1950."
Date: 1954
Creator: Reese, Seth T.; Wrenn, Virginia E. & Reid, Elizabeth J.
Item Type: Refine your search to only Report
open access

Permissible Mine Equipment Approved to January 1, 1953: With Appended List of Available Flame-Lamp Fuels and Manufacturers of Flame-Resistant Trailing Cables

Description: From Introduction: "The present publication includes an appendix listening seven satisfactory fuels available for use in permissible flame safety lamps and shows where the fuels are available. This publication also includes an appendix listening manufactures of flame-resistant trailing cables, with the corresponding symbol that must be used by these manufactures in marketing trailing cables that have passed the test for flame resistance contained in Schedule 2E."
Date: 1954
Creator: Brunot, H. B.
Item Type: Refine your search to only Report
open access

Contributions to the Data on Theoretical Metallurgy: [Part] 12. Heats and Free Energies of Formation of Inorganic Oxides

Description: From Introduction: "This bulletin purposes to collect and compile, in readily usable form, heat and free-energy-of-formation data for inorganic oxides. Such data are used in evaluating heat balances in metallurgical processes, in appraising possible improvements in existing metal extractive methods, and as a guide in the search for better methods of producing metals of recent or possible future commercial interest."
Date: 1954
Creator: Coughlin, James P.
Item Type: Refine your search to only Report
open access

Thrust and Pumping Characteristics of a Series of Ejector-type Exhaust Nozzles at Subsonic and Supersonic Flight Speeds

Description: Report presenting an investigation in the supersonic wind tunnel to determine the thrust and pumping characteristics of a series of ejector exhaust nozzles. Results indicated that the free-stream Mach number had no effect on those characteristics of the ejectors in the range for which the secondary flow was choked.
Date: November 17, 1954
Creator: Hearth, Donald P. & Valerino, Alfred S.
Item Type: Refine your search to only Report
open access

Speed-Brake Investigation at Low Speed of a 1/10-Scale Model of the MX-1554A Airplane With a Circular Jet Nozzle

Description: Report discussing an investigation of the effect of curved speed brakes on the drag characteristics and longitudinal stability and control characteristics of a model of the MX-1554A with a circular jet nozzle. The speed brakes were tested at several deflections, gaps, and locations in the landing configuration and clean configuration. Results of a lateral- and directional-stability study due to reduction in the vertical tail area are also provided.
Date: January 7, 1954
Creator: Solomon, Martin
Item Type: Refine your search to only Report
open access

Performance of Isentropic Nose Inlets at Mach Number of 5.6

Description: Memorandum presenting an investigation of the performance of inlet configurations with a forebody designed for isentropic external compression at a nominal Mach number of 5.6. At zero angle of attack, all the configurations yielded larger total-pressure recoveries than had previously been obtained with a single-conical-shock inlet. Results regarding the flow about the forebody, inlet performance, and performance comparisons are provided.
Date: May 6, 1954
Creator: Bernstein, Harry & Haefeli, Rudolph C.
Item Type: Refine your search to only Report
open access

Free-flight Tests of 45 Deg Swept Wings of Aspect Ratio 3.15 and Taper Ratio 0.54 to Measure Wing Damping of the First Bending Mode and to Investigate the Possibility of Flutter at Transonic Speeds

Description: Free flight tests of 45-deg swept wings of 3.15 aspect ratio and 0.54 taper ratio to measure wing damping and possible transonic flutter.
Date: October 12, 1954
Creator: O'Kelly, Burke R.; Lundstrom, Reginald R. & Lauten, William T., Jr.
Item Type: Refine your search to only Report
open access

Wind-Tunnel Investigation at Low Speed of the Rolling Stability Derivatives of a 1/10-Scale Model of the Douglas A4D-1 Airplane

Description: Report discussing an experimental investigation of the low-speed rolling stability derivatives of a model of the Douglas A4D-1. The model was tested under a variety of conditions, including in clean and landing configurations and with the horizontal and vertical tails on and off, and the study also explored the effects of slats and flaps on the derivatives of the wing. No analysis of the data is provided.
Date: October 7, 1954
Creator: Wolhart, Walter D. & Fletcher, H. S.
Item Type: Refine your search to only Report
open access

Wind-Tunnel Investigation at Low Speed of the Yawing Stability Derivatives of a 1/10-Scale Model of the Douglas A4D-1 Airplane

Description: Report discussing testing of a model of the Douglas A4D-1 to determine its low-speed yawing stability derivatives. The model was tested in clean and landing configurations with horizontal and vertical tails on and off and an investigation into the effect of slats and flaps on the wing-alone derivatives.
Date: August 25, 1954
Creator: Wolhart, Walter D. & Fletcher, H. S.
Item Type: Refine your search to only Report
open access

The Effect of Blunt-Trailing-Edge Modifications on the High-Speed Stability and Control Characteristics of a Swept-Wing Fighter Airplane

Description: An investigation was conducted on a 35 deg swept-wing fighter airplane to determine the effects of several blunt-trailing-edge modifications to the wing and tail on the high-speed stability and control characteristics and tracking performance. The results indicated significant improvement in the pitch-up characteristics for the blunt-aileron configuration at Mach numbers around 0.90. As a result of increased effectiveness of the blunt-trailing-edge aileron, the roll-off, customarily experienced… more
Date: May 26, 1954
Creator: Sadoff, Melvin; Matteson, Frederick H. & Van Dyke, Rudolph D., Jr.
Item Type: Refine your search to only Report
Back to Top of Screen