. Electric railway journal . and air brake apparatus, is 12,360 lb., andcomplete, ready to run, 34,500 lb. The special equipmentincludes Consolidated buzzers, Ohio Brass Companys airsanders, Peacock hand brakes, Cincinnati Car Companysdrawbars, National Lock Wasber Companys curtains andillustrated herewitb. A POLE-PRESERVING MACHINE Among the methods which bave been tried for pole pres-ervation are the effective but costly pressure treatment ofthe entire pole and the cheap but less efficient brush ornon-pressure treatments. Since poles decay almost ex-clusively at the ground line, the problem
. Electric railway journal . and air brake apparatus, is 12,360 lb., andcomplete, ready to run, 34,500 lb. The special equipmentincludes Consolidated buzzers, Ohio Brass Companys airsanders, Peacock hand brakes, Cincinnati Car Companysdrawbars, National Lock Wasber Companys curtains andillustrated herewitb. A POLE-PRESERVING MACHINE Among the methods which bave been tried for pole pres-ervation are the effective but costly pressure treatment ofthe entire pole and the cheap but less efficient brush ornon-pressure treatments. Since poles decay almost ex-clusively at the ground line, the problem of their preser-vation is confined practically to finding an inexpensive yetsatisfactory method of treating that portion of the polewhich is near the ground line. Working on this basis,George P. Benton and I. B. Eberhardt, of Chicago, baveinvented the B. & E. pole-preserving machine, which isdescribed herewith. A demonstration of this machine was made on Sept. 20in the pole yard of one of the largest public utility cor-. Pole-Preserving Machine porations of Chicago. About a dozen representatives werepresent from the United States Forest Service and fromseveral of the leading electric utility companies of Chicagoand other cities. Three 35-ft. Michigan cedar poles cutlast winter were treated seven, ten and fifteen minutes,respectively with heated creosote oil which was injectedby an air pressure of about 5 lb. per square inch into a3-ft. band corresponding to the ground belt of the pole. With the ten-minute treatment an initial penetration of 3/16in. was obtained and this extended in a few days to a depthof over ]/? in. In the ten-minute treatment the pole ab-sorbed a full gallon of oil in the 3-ft. band that was sub-jected to the treatment. The accompanying illustrations of the machine are fromphotographs taken during the tests. The machine is about19 ft. long and 6 ft. wide. It is mounted on wheels so
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
