. The railroad and engineering journal . ary boilers, Audouin allowed the oil to flow from thesupply pipe in a canal along the plate, from which it over-flowed into the vertical grooves. This, of course, neces-sitates only one supply pipe and one regulating tap. Theplate that takes the place of the door has openings between the grooves for admission of air. Theair supply is regulated by a valve, movable in sections,and fitted in front of the openings. The chimney draft isequal to an air pressure that would raise a column ofwater in., and Audouin claims to have evaporatedabout
. The railroad and engineering journal . ary boilers, Audouin allowed the oil to flow from thesupply pipe in a canal along the plate, from which it over-flowed into the vertical grooves. This, of course, neces-sitates only one supply pipe and one regulating tap. Theplate that takes the place of the door has openings between the grooves for admission of air. Theair supply is regulated by a valve, movable in sections,and fitted in front of the openings. The chimney draft isequal to an air pressure that would raise a column ofwater in., and Audouin claims to have evaporatedabout to 33 lbs. of water wilh lbs. of heavy tar oilin a longitudinal boiler walled in, with internal firing anda wheel draft, which did a duty of about 20 Drip fires invented by MM. St. Claire-Deville and Dupuyde Lome, whose plans were based on the system ofAudouin, were applied in 186S to the boilers (fig. 3) of theimperial yacht Pucbla, the fire-door and fire-bars of whichwere takgn away. A plate of cast iron was fixed on the. top, and vertical fire-bricks surrounded by a frame werefitted underneath instead. The upper frame of the platereceived the mouths of 13 small pipes, each supplied witha funnel, and into these the oil fell in drops from a supplypipe. This supply pipe had a separate cut-off tap for eachsmall pipe. The oil flowed into the supply pipe from apipe, also providt;d wilh a tap, which was conducted froma tank placed so high as to insure a constant How of taps regulated the supply of oil into the different pipes,and consequently its evaporation and distribution. Theburning oil flowed out upon the floor of the grate, whichinclined slightly backward and was made of fireproofstone, and was roofed over by the same material. Thefire-bridge also had a vaulting of the same height. Thespace between the vaults allowed of the escape of the gases into the tubes. Heavy coal-tar oil, with a specific gravityof , was the luel used. At the trial the flame w
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Keywords: ., bookcentury1800, bookdecade1880, bookidrailroadengi, bookyear1887
