Report of the Chief of Ordnance to the Secretary of WarU.S. Government Printing Office, 1887 |
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Página 7
... mortar under fabrication by contract with the South Boston Iron Works has been completed and sent to the Proving ... mortar firing . The car- riage used in the trials of the 12 - inch M. L. mortar at Sandy Hook was not satisfactory . It ...
... mortar under fabrication by contract with the South Boston Iron Works has been completed and sent to the Proving ... mortar firing . The car- riage used in the trials of the 12 - inch M. L. mortar at Sandy Hook was not satisfactory . It ...
Página 11
... mortars , —the comparatively low cost of mortars enabling us to compensate by numbers for any lack of accuracy of fire . As a projectile force gunpowder yet stands supreme . It strikes its terrific blow at long distances ; its arm ...
... mortars , —the comparatively low cost of mortars enabling us to compensate by numbers for any lack of accuracy of fire . As a projectile force gunpowder yet stands supreme . It strikes its terrific blow at long distances ; its arm ...
Página 15
... mortar . With regard to the first piece , after being fired 137 rounds with a maximum charge of 265 pounds powder and a projectile of 800 pounds - the mean pressure for 100 rounds being about 28,000 pounds , or 12 tons - the chamber and ...
... mortar . With regard to the first piece , after being fired 137 rounds with a maximum charge of 265 pounds powder and a projectile of 800 pounds - the mean pressure for 100 rounds being about 28,000 pounds , or 12 tons - the chamber and ...
Página 16
... mortar had proceeded beyond 400 rounds , establishing beyond doubt the ample resistance of the piece , but the board for testing rifled cannon were not satisfied with the accu- racy of fire and decided to suspend firing until the new 12 ...
... mortar had proceeded beyond 400 rounds , establishing beyond doubt the ample resistance of the piece , but the board for testing rifled cannon were not satisfied with the accu- racy of fire and decided to suspend firing until the new 12 ...
Página 28
... with steel . ( 8 plates . ) Appendix 22. - Construction report on 12 - inch B. L. rifled mortar , cast - iron , hooped with steel . ( 1 plate . ) Appendix 23. - Construction report on hooping chase of 8 28 REPORT OF THE CHIEF OF ORDNANCE .
... with steel . ( 8 plates . ) Appendix 22. - Construction report on 12 - inch B. L. rifled mortar , cast - iron , hooped with steel . ( 1 plate . ) Appendix 23. - Construction report on hooping chase of 8 28 REPORT OF THE CHIEF OF ORDNANCE .
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Términos y frases comunes
3.2-inch breech-loading Appendix Arsenal axle band base ring blank cartridges block bolts bore brake breech breech mechanism breech-block breech-loading rifle caliber 45 carriage carrier ring cartridges cast cast-iron cent Chief of Ordnance compression contract cylinder Density Double hooping Du Pont's dynamite Elastic limit Elongation after rupture escape of gas Exterior diameter field guns finished forgings front gas-check ring Gatling gun grooves heated hole Hook Hotchkiss inch of original Inside interior jacket June 30 lathe length lever handle mandril metal Middle Midvale Steel Company mortar muzzle nitro-glycerine Ounces P₁ P₂ pins pounds per square powder pressure R₂² rear-sight round sabot Sandy Hook screws seat shell shot shown in Plate shrinkage Single hooping sleeve slot South Boston Iron specimens spindle square inch surface tangential Tensile strength thread Tons Total number transom trunnion trunnion-hoop tube turned Water applied Watertown Arsenal Watervliet Arsenal weight ז ז ז
Pasajes populares
Página 6 - 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 in the manner in which such articles are usually bought and sold, or such services engaged, between individuals.
Página 23 - State of...... ...... .........known and described as and the said party of the second part hereby covenants and agrees to pay to the said party of the first part...
Página 6 - 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.
Página 360 - Avère the maximum obserA'ed in the series ; the range of stresses extending from 50,814 pounds per square inch tension to 59,060 pounds per square inch compression — a total range of 109,874 pounds per square inch in the same piece of metal. The compressive stress exceeded the primitive elastic limit of the metal. Even this is not all, for the observed stresses are the means for their respective rings, the rings which Avère cut apart radially showing additional strains not released until then.
Página 3 - Amount in Government depositories to the credit of disbursing officers and others on June 30...
Página 361 - The stress corresponding to this strain of .0047 of an inch at tbe surface of the bore is 50,720 pounds per square inch, against 34,669 pounds per square inch displayed by the entire ring. The ring was then turned down to .025...
Página 91 - To insure an accurate fit, these plates are planed, bolted together, and bored out. The axle-tree having been turned to a true cylinder, the plates are riveted about it. The shoulder washers are octagonal in form ; to each is fitted a collar or band containing a stout eye, to which the brakes are attached. These collars have projections that embrace the axle-plates above and below, to prevent turning of the axle within the plates. The brakes supplied with this carriage were formed like a double-bow...
Página 24 - States no privity exists by reason of the transfer, and in the absence of any agreement between that company and the United States importing an undertaking by the former to perform the contract referred to, such contract can not be enforced against it by the latter.
Página 20 - ... of Congress and in conference" last session, the Watervliet and Frankford Arsenals being the only sites considered by Congress. The Board will therefore keep such ultimate object in view, and will determine which of the two sites named, Watervliet or Frankford, is on the whole best adapted for the purpose — from the character and extent of the shops and appliances that would be required ; from buildings already erected at either point; from the proximity of the place to the establishments that...
Página 3 - Jane 30, 1881, with such remarks and recommendations as the interests of this branch of the military service seem to require. The fiscal resources and expenditures of the department during the year were as follows, viz : Amount in the Treasury to the credit of appropriations on June 30, 1*60.