Hermes Kelly

 
The rings of the boiler barrel, when welded up, are blocked, to test them by stretching and bring them to the diameter of the boiler. For this purpose the rings are first heated in the
bloHermes Birkin cking furnace shown in Figs. 2169, 217Hermes bags0, having the fire-grate A under the centre, with six chimney-flues C C round the circumference. The ring B to be heated is put in from the top, and placed on end, with the heat from the fire passing up through the inside of the ring and then down all round the outside to the flues, so as to give a uniform heat to the ring.
The ring is then put on the blocking press, shown in Figs. 2171, 2172; which is an ordinary hydraulic wheel-tire blocking press, woBirkinrked by a centre cone D forcing out the blocking segments
E E. These blocking segments are carried up for the purpose and strengthened by brackets, as shown in the drawing. One half of the height of the ring B is blocked at once; and the ring is then turned over for blocking the other half.
The welded joints oHermes outletf these boilers have been tested by a series of experiments upon the tensile strength of strips of plate cut out across the weld, which were taken from several boilers from the racks are lifted clear by the hand-wheel on the shaft T, Bo as to allow the finished lap to be removed. The driving pinion V, from which the callender rollers O receive their motion, is held up in gear by the lever W supported by a catch; and when the lap is finished this catch is released by a tappet upHermes Kellyon the pinion X, which is driven from the bottom callender roller, the speed of the pinion being so reduced that one revolution of it coHermesrresponds to the size of lap required to be made. The catch being released allows the driving pinion V to fall out of gear, whereby the callender rollers O are stopped; and the lnpr-llers P continuing to revolve, break off the fleece, ready for removing the finished lap from the machine. By changing the pinion X, carrying the tappet, the size of lap made by the machine can bo varied as desired.
The .scutcher shown in Fig. 217b- is a single machine, and it is usual to pass the cotton first through a double scutcher of similar construction• but having a second set of feedrollers with beater and wire Hermes Handbagsylinders, running at a higher speed: the second pair of wire cylinders and stripping rollers are driven three times as fast as the first pair, so that they deliver a fleece of one third the thickness first supplied to the machine. » Three of the laps from this double ., scutcher are then fed into the single scutcher shown in the drawing, as at BBli, Fig. 2170-, being spread