Transactions of the Institution of Engineers and Shipbuilders in Scotland Volume 31 (1887-88).cInstitution Of Engineers Scotland
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Author: Institution Of Engineers Scotland
Page Count: 78 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130567441
File size: 8 Mb
File Name: Transactions.of.the.Institution.of.Engineers.and.Shipbuilders.in.Scotland.Volume.31.(1887-88).pdf
Download Link: Transactions of the Institution of Engineers and Shipbuilders in Scotland Volume 31 (1887-88)
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1888 Excerpt: ...independently, and when joined to one another give to the whole cage rigidity and strength, both vertically and horizontally. The cage is held in position by struts and ties, which extend from its corners to rings encircling the tube. As the work advances the sections are transferred as required from the back to the front of the cage. The hydraulic crane (see Fig. 12, Plate XII.) used is of a peculiar design. It consists of two side travelling carriages, connected together by cross girders, on the latter of which is secured the race and other connections necessary for the carrying of the jib and working of the crane. The bodily movements of the crane along the top of the cage is controlled by a ram on each of the side carriages, the points of reaction being a couple of fixtures on the cage. The slewing and lifting rams are fixed to the jib. Hound a drum secured to a fixed centre-post, ropes are led, and over a pulley on the slewing rams, for the purpose of giving the jib this motion. The raising of the load is effected by a single ram lying along the top of the jib. To the plunger of the ram a single pulley is attached, and round it and the pulley on the jib point a rope is made to pass. This arrangement enables the load to be lifted a distance equal to twice the stroke of the ram. The crane is worked by one man. All the rams are formed of wrought iron tubing. Castings are screwed to the ends of the tubes for the fixtures and stuffing boxes. Steel wire ropes, in all cases, are employed to lift the load and slew the crane. The material for the bottom member is either run along a tramway (Fig. 9, Plate XL) fixed to that member, or raised, as the case may be, from the ground, or the water, to position. For the building of the first section of the cantilevers p...
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