Annual Reports ...., Volumen3

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U.S. Government Printing Office, 1886

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Página 7 - All purchases and contracts for supplies or services in any of the departments of the Government, except for personal services, shall be made by advertising a sufficient time previously for proposals respecting the same when the public exigencies do not require the immediate delivery of the articles or performance of the service. When immediate delivery or performance is required by the public exigency the articles or service required may be procured by open purchase or contract at the places and...
Página 319 - Nos. 1 and 5, 2 and 6, 3 and 7, and 4 and 8 were taken, two and two, from the ends of the hoop opposite each other.
Página 299 - A Treatise on the Application of Wire to the Construction of Ordnance." The deductions are, however, different from, and, it is hoped, clearer than those given in the above-mentioned work. The following are, as far as known to the writer, original with him : Formula for extension of wire wound with uniform tension.
Página 328 - .505. Sectional area, .20 square inch. Gauged length, 2*. General, summary. Tensile strength per square Inch of original section .pounds.. Elastic limit per square inch o( original section do Elongation per inch after rupture inch Elongation per inch under strain at elastic l ¡mit , do.
Página 3 - SIR : I have the honor to submit the following report of the principal operations of the Ordnance Department during the fiscal year ended •June 30, 1886, with such remarks and recommendations as the intercuts of this branch of the military service seem to require.
Página 64 - States, shall be publicly subjected to the proper test, including such rapid firing as a like gun would be likely to be subjected to in actual battle, for the determination of the endurance of the same...
Página 195 - ... their manufacture has been undertaken by the Midvale Steel Company of Philadelphia. Three experimental hoops were ordered from this company for test, in order to ascertain how nearly they could come up to the requirements of the Department's circular letter. Two of these hoops were of the largest size that will be required for the experimental guns, and one was annealed after rolling, while the other was oil-tempered and annealed. The third hoop was hammered and oil-tempered, being of the size...
Página 379 - ... this head and rests against the breech-block. The head is not in contact with the block but nearly so, and the distance can be increased or diminished by the nuts screwed on to the rear end of the spindle.
Página 7 - I refer now to the minor supplies, the necessity for which can not be economically anticipated. To meet such cases, and in the interest of a true public economy, I •would recommend that section 3709, Revised Statutes, be amended by inserting after the word "services...
Página 379 - ... to the left when drawn out, and guides the block in entering the breech on closing, allowing the block to be freely turned. It serves, when closed, to fill the space between the jacket and the block. This ring is automatically locked to, and unlocked, by the motion of the block acting on a key -pin. The lever handle for turning the block, and the bronze handle for withdrawing it, are fastened to its rear end. When the lever handle is turned down, after closing the breech, it locks the. breechblock...

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