File:American engineer and railroad journal (1893) (14572086738).jpg

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Identifier: americanengineer67newy (find matches)
Title: American engineer and railroad journal
Year: 1893 (1890s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York : M.N. Forney
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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15 per cent, and raised it to 11,5D0lbs. The modification of the pitch which was raised from .4 in.to .5 in. has also increased tliis resistance by about 10 per cent.,or raising it to 13.800 lbs. in fresh wood and 11,500 lbs. insteadof 10,430 lbs. in wood that has been 9 years in service. Thisgives an average of 10,965 lbs. in ties as they are ordinarilyfound in service. The increase of the pitch to .6 in. seemed to have the effectof lowering the resistance, which was only 13,300 lbs. against13,800 lbs. with the pitch at .5 in. Finally, the screw spike with a diameter of .9 in. and a pitchof .4 in. with the base of the thread only .12 in. did not seemto give any better results than the .8-in. screw spike with apitch of .5 in. either in Northern pine or in oak. An attempt was then made to give the thread a section whichwould be either an isosceles triangle, a right-^ngle triangle, orsome intermediate form such as that which was adopted on the 436 THE AMERICAN ENGINEER (September, 1893
Text Appearing After Image:
o ?!a f- 1: a. Vol. LXVII, No. 9.) AND RAILROAD JOURNAL. 437 Paris, Lyons & Mediterranean road in 1863 (fij;;. 1). Testswhich were made in 1889 have given the following results asthe strain which is reqiiireil to pull different kinds of screwspikes .2 in., either in new oak or in ties which had been nineyears in service. Dimension ofSpike. IsoscelesTriangle. HectansnlarThread. Observations. Serf If spike of .8 in. diameter. New tie. Pitch of .4 inPitch of .li in.Pitch of .5 in. ll.fiSOlbe.1S,4bO..) lbs.13,000 lbs. 12,0.39 lbs.12,6ia lbs.13,560.73 lbs. Average of 4 tests..Average of 4 tests.Average of 4 tests. Scirir .ynkr >r .9 ill. diameter. New tie. Pitch of ..) in. 13,424 lbs. 13,424 Ills. Screw spike Pitch of .4 in.Pilch of .5 in. of .S in. diamtter. J0,253 lbs.lO.aVJ lbs. 9,922 lbs.ll,KU.26lbs. Tie having 9 yearsservice. Srr^U spikiPitch of .5 in. f .9 in. diameter.11,250 lbs. 11,03011)6. Tie hfiviiig 9 yearsservice. These tests do not actually seem to give any preference

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https://www.flickr.com/photos/internetarchivebookimages/14572086738/

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Volume
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67
Flickr tags
InfoField
  • bookid:americanengineer67newy
  • bookyear:1893
  • bookdecade:1890
  • bookcentury:1800
  • booksubject:Railroad_engineering
  • booksubject:Engineering
  • booksubject:Railroads
  • booksubject:Railroad_cars
  • bookpublisher:New_York___M_N__Forney
  • bookcontributor:Carnegie_Library_of_Pittsburgh
  • booksponsor:Lyrasis_Members_and_Sloan_Foundation
  • bookleafnumber:453
  • bookcollection:carnegie_lib_pittsburgh
  • bookcollection:americana
Flickr posted date
InfoField
27 July 2014



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