. American engineer and railroad journal . guring,which is usually resorted to in order to obtain the right pitchof rivets in these seams. The primary object was to get absolutely tight seams. Inthe thicker plates the efficiency of the seams has to a degreebeen made subservient to tightness and the saving of weighthas been carried as far as is consistent with good form in which this information is put speaks for itself. so varying it can have but little effect on (he total current. Thismethod also permits a wide range of speeds with a large num-ber of steps and the size of control
. American engineer and railroad journal . guring,which is usually resorted to in order to obtain the right pitchof rivets in these seams. The primary object was to get absolutely tight seams. Inthe thicker plates the efficiency of the seams has to a degreebeen made subservient to tightness and the saving of weighthas been carried as far as is consistent with good form in which this information is put speaks for itself. so varying it can have but little effect on (he total current. Thismethod also permits a wide range of speeds with a large num-ber of steps and the size of controller required is much 10 h. p. motor of this type, running on a 250-volt 2-wiresystem, has a range of speed of from 350 to 700 r. p. m. In view of the great importance of the development of thisform of motor speed control—so long given up as impracticable—as well as also the admirable treatment of the subject ofelectric drives in Mr. Pomeroys paper, further considerationwill be given to his paper in our next issue. Mr. G. W. Crownover has been promoted from the positionof general foreman of the Illinois Central at Waterloo, Iowa,to that of master mechanic at Free-port, 111. He succeeds the late E. Mr. B. F. Flory has been appointedmechanical engineer of the LehighValley Railroad to succeed Mr. F. , recently promoted to the posi-tion of master mechanic of the Wyom-ing division. Prvfer that Original Diameter ol Hole allow for u Inch Reaming. Plate ■IM A B 0 D £ PlKli Mia. Pit li et. a t> Kll ^ K - 1« IX !% *4 7 . BMI M 1 1 IX ! i a 1 . ■: X Ui IK IX Vt V: »/n T _ 7 ItLM /,* IK IK IX \ 7 j V X IK U IX 3 a /V. Bi . 7<i/i X 3 8LOd • x B&28 X IA w IX 3 X A, 8 ; - Mr. J. J. Reid has resigned as assist-ant superintendent of motive power ofthe Rutland Railroad to accept theposition of general machinery and loco-motive inspector of the Northern Paci-fic, with headquarters at St. Paul. .Mr: W. L. H
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
