. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . d that since itsappearance on the Boston & ProvidenceRailroad in 1857, where it was first in-troduced by Mr. George S. Griggs, it hasundergone a variety of changes in form,and is still engaging the minds of some ofthe cleverest American engineers with a under the barrel of the boiler as openings admit of the pipes beingplaced in position. The holes arc cut1/32-inch larger than the outer diameterof the tubes, and the opening in the outersheet readily admits of means for ex-panding
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . d that since itsappearance on the Boston & ProvidenceRailroad in 1857, where it was first in-troduced by Mr. George S. Griggs, it hasundergone a variety of changes in form,and is still engaging the minds of some ofthe cleverest American engineers with a under the barrel of the boiler as openings admit of the pipes beingplaced in position. The holes arc cut1/32-inch larger than the outer diameterof the tubes, and the opening in the outersheet readily admits of means for ex-panding the tube, and also for the pur-pose of beading the end of the tube,which is usually left a little longer thanin the case of flues generally in the tubesheet, as there is no danger of the pro-jection of the beaded portion burning, be-ing in contact with the water. The open-ing in the outer sheet is fitted with athreaded brass plug which serves as anadditional inspection plug and is readilyremovable and facilitates the cleaning ofthe boiler. TEMPtfT FOR GAUGING ARCH TUBESPLACE AS SHOWN WHILE ROI. HALF SECTION AA TYPICAL ARCH FOR ATLANTICS. PACIFICS AND MOni£R.\TE-SIZED MIKADOS. and smaller types of engines being inmany cases deemed hardly worth whileequipping, as their capacity at best is lim-ited, and their days are numbered, and itis a fact that in small fireboxes and at lowsteam pressures the advantage of thebrick arch is not so marked as in thelarger class of engines. Hence the in-crease in its application may be foreseenas being almost universal in the time towhich we have referred. -\gain to that large spirit of enquiryamong the younger railroad men, as wellas others not so young, there is a constantspirit of enquiry in regard to the formsand details of the device, so that it iswell that this matter, as well as otherimportant matters pertaining to the mod- view to further improvements. Perhapsthe most popular form in which it appearsat the present time is that shown in the
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Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
