. The Street railway journal . tached, and which will reach wellwithin the boiler shell. A hot rivet being inserted, the first operationis to clamp the plates by pressure, when the hammer is started and theblows continue until the metal has partially cooled, which prevents therivet from stretching. These riveters, of which there are a large num- ber, are supported by a block and fall from an overrunning trolley, andcan be operated in almost any position, being supplied with air fromflexible connections. There is a set of twenty foot rollers for bendingthe boiler plates, which are among the lar
. The Street railway journal . tached, and which will reach wellwithin the boiler shell. A hot rivet being inserted, the first operationis to clamp the plates by pressure, when the hammer is started and theblows continue until the metal has partially cooled, which prevents therivet from stretching. These riveters, of which there are a large num- ber, are supported by a block and fall from an overrunning trolley, andcan be operated in almost any position, being supplied with air fromflexible connections. There is a set of twenty foot rollers for bendingthe boiler plates, which are among the largest in the country. Bymeans of these rollers long bottom sheets can be bent, so that the boilercan be built with one continuous bottom sheet, when desired. The flanging tools are among the most interesting portions of theequipment, and these comprise tools for the flanging of the flue holesin the flue sheets, and also for the flanging of the edge of the flue sheets are first cut to the proper diameter, and then are. BOILER—BROWNELL & CO., DAYTON. O. brought to a white heat in a large brick furnace in which crude oil isemployed for fuel. From this they are moved on an iron truck to theflanging machine proper, in which they are centered in a horizontalposition and permanently clamped, the edge at one side being embracedby a pair of horizontal rollers, about six inches in diameter, which areattached by a quadrant to a crank arm, and which when set in motionpasses rapidly around the plate, the horizontal rolls gradually turningup at an angle, thus bending and forging the edge of the plate in oneoperation. The flue holes aie then drilled in the ordinary manner, andwhen designed for large flues are each flanged, as shown above, bybeing heated one hole at a time over a flat forge, when they are trans-ferred to the flue Hanger which consists of a perpendicular spindle ter-minating in a head with small rollers set at a particular angle. Theplates are shifted from the forge
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
