. Railway mechanical engineer . of thoroughly cleaning flue sheets beforewelding with the electric arc has led to the development ofa special sand lilasting machine for doing the work, which isshown in the illustration. The reservoir has a capacity of about 100 lb. of sand and. A Handy Sand Blasting Apparatus !s fitted at the top with an air gage, an mlet valve D, anexliaust valve A and a filling ])lug B. A two-in. Street ellin the lower head serves as an outlet for the sand. The 91 92 RAILWAY MECHANICAL ENGINEER Vol. 91, No. 2 nozzle, which imparts velocity to the sand is made of , wi
. Railway mechanical engineer . of thoroughly cleaning flue sheets beforewelding with the electric arc has led to the development ofa special sand lilasting machine for doing the work, which isshown in the illustration. The reservoir has a capacity of about 100 lb. of sand and. A Handy Sand Blasting Apparatus !s fitted at the top with an air gage, an mlet valve D, anexliaust valve A and a filling ])lug B. A two-in. Street ellin the lower head serves as an outlet for the sand. The 91 92 RAILWAY MECHANICAL ENGINEER Vol. 91, No. 2 nozzle, which imparts velocity to the sand is made of , witli the end from which the air escapes drawn downto an internal diameter of ^4 *>■ The sand used should bepassed through a No. 8 sieve and should be free from dust. The method of using the device is as follows: The valveA is opened to relieve any pressure on the reservoir and theplug B is removed. The reservoir is then filled with sand,the plug replaced and the valve A closed. The hose C isattached to the air supply line and valve D opened, admit-ting 5-lb. pressure to the reservoir, which is sufficient toforce sand to the point E. The valve D is then closed andvalve F opened, sand being forced through the nozzle Gagainst the flue sheet. To stop the apparatus it is
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
