. Railroad digest . tached, by which we imagine he means that to draw the pointer to the 100-lh. markit is always requisite to apply 100 lbs. to the spring balance;but that might have little or no relation to the pressure persquare inch within the boiler and upon the safety valve. Flanges on All Drivers American Engineer and Railroad Journal. Dec. 1900, p. 367. This subject is dealt with in a chapter on Wliat JlotivePower Officers Consider Important. Flanges on all drivers appear to be the rule almost every-where, the problem being with flanges, how to give the neces-sary lateral motion to all
. Railroad digest . tached, by which we imagine he means that to draw the pointer to the 100-lh. markit is always requisite to apply 100 lbs. to the spring balance;but that might have little or no relation to the pressure persquare inch within the boiler and upon the safety valve. Flanges on All Drivers American Engineer and Railroad Journal. Dec. 1900, p. 367. This subject is dealt with in a chapter on Wliat JlotivePower Officers Consider Important. Flanges on all drivers appear to be the rule almost every-where, the problem being with flanges, how to give the neces-sary lateral motion to allow for the effects of curving. Oneway is to set the tires in toward the center of the track. An-other is by making the gauge of the central wheels of 10-wheeled and consolidation engines narrower than the stand-ard. Again by setting the tires to standard distance andparing down the flanges where tliey bear against the rail, orby setting the tires of the middle wheels at somewhat less 26 RAILROAD DIGEST January, 1901. Track Tank Water Scoop.—Lake Shore i Michigan Southern Railway. than standard distance and leaving them of standard contour,but giving the wheels sufficient play to accomplish the same re-sult as the other methods. On the Lehigh Valley % in. lateralplay is allowed. Track Tank Water Scoop American Engineer and Railroad Journal, Nov., 1900, p. 344. The L. S. & M. S. have lately designed a track tank waterscoop to be used at very high speeds. Tests made with thenew apparatus show that the effort of the designer to meetsome very hard conditions in service have been eminentlysuccessful. Mr. H. F. Ball, mechanical engineer of the L. M. S., has been able to apply a construction which per-tuits the scoop to be raised by hand at a speed of 70 milesper hour; one which would not require the working jointsto be machined, which would not cause a splash at the highestspeeds, and which would also permit of a power-lifting at-tachment using compressed air. The whole thing is
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