. The science of railways . J(Sor\.€yontp CvQf^ Section Throti^^Tiec^Uer (Fig. 179) as usual and besides has a connec-tion to F through the top of the steam chest, asshown. There being no pressure in the receiver(to which chamber E is connected throughthe open intercepting valve G), the weight ofN will have caused the converting valve Lto drop down, and thus the live steam passesthrough valve L into the tube AJ. Port K ad-mits steam to the enlarged top of the annularstem H, forcing the intercepting valve G down onits seat B and bringing the ports D in the stem Hopposite the ports J of the cent
. The science of railways . J(Sor\.€yontp CvQf^ Section Throti^^Tiec^Uer (Fig. 179) as usual and besides has a connec-tion to F through the top of the steam chest, asshown. There being no pressure in the receiver(to which chamber E is connected throughthe open intercepting valve G), the weight ofN will have caused the converting valve Lto drop down, and thus the live steam passesthrough valve L into the tube AJ. Port K ad-mits steam to the enlarged top of the annularstem H, forcing the intercepting valve G down onits seat B and bringing the ports D in the stem Hopposite the ports J of the central steam tube A,thus admitting live steam through them to the OPE It AT ION OF COMPOUND LOCOMOTIVES. 21)5 receiver and low-pressure steam chest. With theintercepting valve G closed (down), the firsthigh-pressure exhaust, acting in chamber Ethrough the port I?, causes piston N to lift andclose the converting valve L (as shown in and 181), thereby shutting off the supply ofsteam from F to the central tube AJ. What. steam remains in this tube escapes through therelief port M and allows the intercepting valve Gto move up (open) by live steam pressure fromthe pipe C acting in the annular cavity B, ashereinbefore described, assisted by the high-pressure exhaust below G. The engine thenworks compound, as live steam is shut off from 296 ENGINEERS AND FIREMENS MANUAL. the low-pressure cylinder and the exhaust fromthe high-pressure cylinder takes its place. The engine above described is an automaticcompound, that is^ starts with live steam in bothcylinders but after the first stroke changes auto-matically to compound. The inventor of this system, in a design notshown, introduces a reducing valve in the centraltube A and adds a separate exhaust valve operatedby live steam from a three-way cock in the cab,thus making a compound of the convertible class,but at the same time he does not advise convert-ible construction in compounds. Accidents to Dickson Coynpounds.—What shouldb
Size: 1633px × 1530px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900
