. American engineer and railroad journal . Vi. z% 3K3«i m in. m1% lA nj VA 2A2A R S T in. in. in. 1% 12M H VA 12% A m 14 % 9« 15-« % 10« 17H A 11 17?i % 12 19H M12 19H %12 \9% A1254 21 %mi 21 % Per cent, ofsolid plate. A % AAA% n 88878685858483838180 PHOIORTIONS OF RIVET HEADS. Button head = IH diameter shank -t- 3-^ of head = v,,;, diameter of head. Countersunk of head = hi diameter of of head = GO degrees (exactly). Diameter Duttonheads. Countersunk headsof rivet. %H%1 ly*1% A H % lA ly* lA mla 2 2A B A» IS33 Aii 1 H il n1 lA1%lAHi m 2A JAHA%
. American engineer and railroad journal . Vi. z% 3K3«i m in. m1% lA nj VA 2A2A R S T in. in. in. 1% 12M H VA 12% A m 14 % 9« 15-« % 10« 17H A 11 17?i % 12 19H M12 19H %12 \9% A1254 21 %mi 21 % Per cent, ofsolid plate. A % AAA% n 88878685858483838180 PHOIORTIONS OF RIVET HEADS. Button head = IH diameter shank -t- 3-^ of head = v,,;, diameter of head. Countersunk of head = hi diameter of of head = GO degrees (exactly). Diameter Duttonheads. Countersunk headsof rivet. %H%1 ly*1% A H % lA ly* lA mla 2 2A B A» IS33 Aii 1 H il n1 lA1%lAHi m 2A JAHA%A A%U The above table is adapted from the rivet proportions recom-mended by the Pencoyd Iron Works. The sizes represent headsof symmetrical proportions. The proportions given for the various styles of seams rep-resent what is known to be good practice. With good work-manship no trouble should be experienced in making perfectlytight work even with the wide pitches used for the thinnersheets. 364 AMERICAN ENGINEER AND RAILROAD Twelve-Wheel Freight Locomotive with Wide FIrebox-D., L. & W. W. FiTzGiBBON. Superintendent of Motive Power, Brooks Locomotive Works, Builders. TWELVE-WHEEL FREIGHT LOCOMOTIVES. the boiler by a %-inch plate brace and from the smokebox by 2%-inch rod braces. Delaware, Lackawanna & Western Railroad. The boiler is large, with 3,168 square feet of heating surface and square feet of grate area. The grates are of the water-Built by the Brooks Locomotive Works. tube type and the firebox is 123 by 97 inches in size. The heat- ■ ing surface of the firebox is very large, even larger than thatDrawings and a photograph of the new 12-wheel freight loco- of the Lehigh Valley pushing engines. The latter engines havemotives recently built by the Brooks Locomotive Works for 215 square feet of heating surface in the firebox and the D. Delaware, Lackawanna & Western, have been received from & w. engines have 218 feet. The firebox heating surf
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
