. American engineer and railroad journal . these supports prevent their moving after beingplaced in position. The number of doors which can thus beplaced is limited only by the height at which they can con-veniently be handled without taking up more floor space thanenough for one door. The accompanying engravlngi lllui irate a new form of jointfor piston packing rings, designed and patented by Mr. MillardF. Cox, Chief Draftsman of the Richmond Locomotive purpose is to free the ordinary split packing rings, particu-larly of large pistons, from the difficulties of leakage and i
. American engineer and railroad journal . these supports prevent their moving after beingplaced in position. The number of doors which can thus beplaced is limited only by the height at which they can con-veniently be handled without taking up more floor space thanenough for one door. The accompanying engravlngi lllui irate a new form of jointfor piston packing rings, designed and patented by Mr. MillardF. Cox, Chief Draftsman of the Richmond Locomotive purpose is to free the ordinary split packing rings, particu-larly of large pistons, from the difficulties of leakage and i caused by the access of the steam to the end of the ringsat the joints. This pressure tends to expand the rings and weartin cylinders, particularly at the endi . where the steam pressureis greatest. The engravings make the construction clear. At the ends ofthe packing rings a socket is cut in the piston, into which aplug fits loosely enough to permit of self-adjustment, and this i,, i„ either threaded oi made agilding it a )■ _L_J l_J Fig. 4 ^This style used with narrow rings. Fig. 5 \^ ILia style used with uide rings
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
