Proceedings (Volume 6)

This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1890. Not illustrated. Excerpt: ... herewith, where the centre pipe is fixed and passes through the hollow centre of the crane. This centre pipe is divided into four sections having outlets at different elevations, and over each of these outlets a sleeve is fitted, packed top and bottom, but free to revolve, and to this sleeve a pipe is attached which passes down to the nest of valves in front of the operator. By a new method of effecting the turning, however, only two pipes are required to enter the crane, one inlet and one outlet, all the other pipes being fed by or exhausting into these two pipes. The lifting-ram of the crane is made to work into two cylinders as shown, the one cylinder being in constant communication with the pressure system, and so acting as a balance to take up just as much of the dead load as is thought desirable, the other cylinder effecting the raising and the lowering of the tables, the water passing into this cylinder practically representing all the water consumed as far as vertical adjustment is concerned. It is also proposed to drive the rollers by means of a small hydraulic engine, so that the whole of the movements of raising and lowering, rotating, adjusting by means of manipulators, and passing to and fro through the rolls, are effected by hydraulic power. I may add, in conclusion, that the hydraulic ingot extractor is being put in at the new plant of the Pennsylvania Steel Company at Sparrow's Point, Md., where the whole system of casting and re-heating has been arranged to suit this special method of stripping and handling, whilst the transfer tables will probably be put in for the Central Iron Company, of Harrisburg, in the early spring. Discussion. P. Baenes: It may seem somewhat discourteous to enter a general demurrer at this time against this class of mach...