. Science of railways . nONTBUSHINC ^^^^PT^^n^ COUPUNG Inside case or shell \ rear disc, rotor and center boltSectional View of Lagonda Air or Steam Arch Tube Cleaner vestige of scale has been thoroughly removed. At the sametime the shortness of the body and the use of the toggle jointpermit these cleaners to passthrough curved tubes with thegreatest freedom. The cleaners are built in anysize from 2 to 4 inches, and operatesatisfactorily on from 40 to 60pounds air or steam pressure and100 pounds or more water pressure. When the air or steam driventype of cleaner is used an automaticlubricator
. Science of railways . nONTBUSHINC ^^^^PT^^n^ COUPUNG Inside case or shell \ rear disc, rotor and center boltSectional View of Lagonda Air or Steam Arch Tube Cleaner vestige of scale has been thoroughly removed. At the sametime the shortness of the body and the use of the toggle jointpermit these cleaners to passthrough curved tubes with thegreatest freedom. The cleaners are built in anysize from 2 to 4 inches, and operatesatisfactorily on from 40 to 60pounds air or steam pressure and100 pounds or more water pressure. When the air or steam driventype of cleaner is used an automaticlubricator such as is shown in theaccompanying illustration, is recom-mended. This insures thorough lu-brication of the cleaner with lessoil, reduces wear and tear and in-creases the efficiency as all oilpasses through the small flexibletubing and does not allow any oilto come in contact with the rubberhose. Lubricator. ^22 LOCOMOTIVE APPLIANCES. THE DEAN BOILER TUBE CLEANER The Dean boiler tube cleaner is a pneumatic vibrator whichremoves scale from the inside or outside of tubes of boilers,condensers, or evaporators. It cleans from ten to thirty tubesan hour, and besides removing the scale from the water sideof the tube, it removes the caked soot from the fire side. It is operated by compressed air or steai)^ and works onthe principle of the ordinary steam engine. The illustration above shows* a sectional view of the Dean. Power passes through the nozzle A to the chamber as valve .04 is thrown back and forth the power isadmitted alternately through the ports C, C to each end of
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