Annual Report (or Report) of the Secretary of War, Volumen3U.S. Government Printing Office, 1886 |
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Página 8
... steel forgings is perhaps scarcely sufficient to arouse much competition among steel makers , but it would doubtless prove a healthful stimulus to those manufacturers who are now engaged in supplying the Govern- ment with gun forgings ...
... steel forgings is perhaps scarcely sufficient to arouse much competition among steel makers , but it would doubtless prove a healthful stimulus to those manufacturers who are now engaged in supplying the Govern- ment with gun forgings ...
Página 10
... steel rifle , the weight of which is 21.5 tons less than that of this 12 - inch cast- iron gun . At the 50th round erosions were observed in the bore , which increased in number and in gravity of character as the firing progressed . At ...
... steel rifle , the weight of which is 21.5 tons less than that of this 12 - inch cast- iron gun . At the 50th round erosions were observed in the bore , which increased in number and in gravity of character as the firing progressed . At ...
Página 11
... steel ; cast - iron hooped and tubed with steel . The contracts for the manufacture of the above guns , although ex- tended about one year in each case , were not completed by June 30 , 1886 , the end of the fiscal year , at which time ...
... steel ; cast - iron hooped and tubed with steel . The contracts for the manufacture of the above guns , although ex- tended about one year in each case , were not completed by June 30 , 1886 , the end of the fiscal year , at which time ...
Página 12
... steel , similar to the present M. L. mortar , except as to such details of chambering , rifling and type of projectile as are peculiar to breech- loading systems . The body for this mortar has been cast at the South Boston Iron Works ...
... steel , similar to the present M. L. mortar , except as to such details of chambering , rifling and type of projectile as are peculiar to breech- loading systems . The body for this mortar has been cast at the South Boston Iron Works ...
Página 13
... steel gun has been slow , owing mainly to the novelty and manifold detail of the construc- tion . This gun is still in a very backward state , that stage not having yet been reached in which the various parts are being finished for ...
... steel gun has been slow , owing mainly to the novelty and manifold detail of the construc- tion . This gun is still in a very backward state , that stage not having yet been reached in which the various parts are being finished for ...
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Términos y frases comunes
35 Hotchkiss ammunition Appendix Arsenal band blank cartridges bolts bore breech mechanism breech-loading rifle caliber 45 carriage cartridge cast Cast band cast-iron cent center of impact chamber Chief of Ordnance cincha clamps compression copper cylinder Density deviation from center Du Pont's Elastic limit eter Exterior diameter feet Fired into sand flight forgings Frankford Arsenal front fuze gallons gas check gas-check Gatling gun grooves hoop Hotchkiss 181 inch of original Inside iron jacket loading Mean metal Middle Midvale Steel Company miles an hour mortar mountain gun muzzle Number of rounds P. M.-Barometer pack piece pins plate Pont's pounds per square powder pressure projectile radius rear Recoil ring sabot saddle sand butt screws Sept shell shot shrinkage specimens square inch straps surface tangential target Tensile strength tension thermom thick trunnion-hoop trunnions tube velocity Watertown Arsenal weight West Point Foundry wheels wire yards
Pasajes populares
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 359 - 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 328 - 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 378 - .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 74 - 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 208 - ... 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 419 - ... 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 419 - ... 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...