File:The Street railway journal (1904) (14575707347).jpg

Identifier: streetrailwayjo241904newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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t and drill is prohibited owing to the lack of room, aswell as the length of time required. The use of a portablegrindstone is also impracticable for most of the positions indi-cated, and very expensive. To scrape by hand the surface ofthe girders and remove several coats of hard dried paint wouldrequire a large force of men and a long time in execution. Theuse of acids or other solutions is practically forbidden becauseof the danger of damage to traffic in the street. Consequentlythe proposition narrows down to the use of a sand blast and asoldered joint. The contract for the Brooklyn system wasmade by George B. Blanchard, of New York, who is carryingon this work with the following apparatus: Fig. 3 is a view of one of the two portable sand-blast outfitsnow at work in the streets of Brooklyn. It consists of oneD-4-EG Westinghouse motor-driven air compressor on a plat-form wagon between two 24j/j-in. x 48-in. reservoirs. Thiscompressor is one of the well-known type in general use with
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FIG. 3.—PORTABLE SAND-BLAST OUTFIT the Westinghouse air brakes when installed on electric trac-tion systems, and consists of a duplex, horizontal, single-actingpump mounted on a common bed-plate with a direct-currentseries railway type motor. It develops approximately 9^mechanical hp when pumping against 100 lbs. air pressure,and has a capacity of 50 cu. ft. of free air per minute with 600volts line current. The positive lead to the motor is connectedwith the trolley wire of the surface traction road, this wirebeing hung from the elevated structure by suitable brackets.The wooden pole shown in Fig. 3 as resting upon the wagon

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