. Railway mechanical engineer . to support the current carrying wires andto prevent rotation of the stationan,- part of the messenger is supported rigidly on one tower and on theother is fastended to one end of a weighted bell crank whichinsures uniformitv of tension on the messenger wire at alltemperatures. PIT .\XD BRIDGE COXSTRUCTIOX In order to insure no settlement at the coping wall onaccoimt of the pounding received in ser\-ice. iron copingcastings with 1-in. walls were employed instead of woodensills. These castings are arranged one for each approachtrack and are thoroughl
. Railway mechanical engineer . to support the current carrying wires andto prevent rotation of the stationan,- part of the messenger is supported rigidly on one tower and on theother is fastended to one end of a weighted bell crank whichinsures uniformitv of tension on the messenger wire at alltemperatures. PIT .\XD BRIDGE COXSTRUCTIOX In order to insure no settlement at the coping wall onaccoimt of the pounding received in ser\-ice. iron copingcastings with 1-in. walls were employed instead of woodensills. These castings are arranged one for each approachtrack and are thoroughly embedded in and bolted to theconcrete. They are accurately aligned to the approach tracksand weigh about 9,000 lb. each, are 5 ft. 6 in. long. 12 and 30 in. high. The circle rail on which the trucks and tractors run is106 ft. in diameter and is supported on 3,5 castings each ville, N. Y. Others will be installed in the near futureat Wilmington, Del., Youngwood, Pa., Pitcaim (Pa.)(emergency table) and at East General Arrangement of the Trucks 9 ft. 4 in. long, 10 in. high and 12 in. wide, with Xo sand is used in connection with the operationof the tractors because of the ample capacity of the tractorsthemselves. This feature eliminates the resistance of thesand to rolling of the trucks. The cast steel end ties on the bridge have a maximumdepth of 12 in. a flange width of 5 in. and a minimum widthof 8^-^ in. The sections are 1 in. thick. They support boththe traction rails and the guard rails and are lined to thebridge girders by means of ^ in. of stereotype metal. The design of this table was developed under the directionof A. S. Vogt, formerly mechanical engineer, who has nowretired. Tables of this t}pe have been installed at Pitcairn, SouthPhiladelphia, Erie, Kane and Renovo, Pa., and at Garden- FIRE PUMPS ON SWITCH ENGINES BY J. H. B. An arrangement for fire pumps on switch engines, inwhich the pump is mounted on top of the boiler, is shownin
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
