. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. Rails, Chairs, and Sleepers, w ith the " Cramp Gauge " Guide Tube and Auger. the chairs simple in form, possessing great regularity, and giving the inward inclination to the rail within the chairs, instead of depending upon the rail- layer doing it in fixing them; and that the fastenings should be simple, but firm, and not liable to breakage, or to be detached by the passage of the carriages. With these views he had directed four sleepers to be cut diagonall
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. Rails, Chairs, and Sleepers, w ith the " Cramp Gauge " Guide Tube and Auger. the chairs simple in form, possessing great regularity, and giving the inward inclination to the rail within the chairs, instead of depending upon the rail- layer doing it in fixing them; and that the fastenings should be simple, but firm, and not liable to breakage, or to be detached by the passage of the carriages. With these views he had directed four sleepers to be cut diagonally out of each square log of foreign timber, giving about 2 J cubic feet to each sleeper; to place them with the right angle downwards, so that the ballast could always be consolidated by ramming, without lifting the sleeper, or digging around it, as with square, or other formed sleepers; two places are planed to receive the chairs, and one fastening hole bored in each sleeper; they are then kyanized in close tanks, completely filled with the prepared solution, under a pressure of 80 lbs. per square inch. When placed upon the ballast, the joint chairs are first put down 15 feet apart, and the intermediate chairs loosely placed 3 feet apart; " cramp gauges," embracing the inside and out- side of the rails, are then fixed between each pair of sleepers, and the wedges along one side driven up—one trenail being driven in each chair, the hole for which is previously bored in the sleeper by a gauge, to insure an equal projection on each side of the rail. A " guide tube " of an internal diameter to fit the spiral auger for boring the trenail holes, with the external lip tapered to correspond with the hole in the chair for the head of the trenail, is then used, and by its agency the holes are pierced with great accuracy, concentric with the hole in the chair, at the same time protecting the tool from being injured by the cast iron. The intermediate chairs are then
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Keywords: ., boo, bookcentury1800, booksubjectarchitecture, booksubjectscience
