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The machine we illustrate weighs 11 tons, and is all self-contained, the standards being mounted on a strong bedplate, which also carries the bearings for the shaft with fast and loose pulleys, belt gear, etc. Thus no foundation is required. Engineering. By COLONEL MAITLAND. A great change has lately been taking place throughout Europe in the matter of armaments.
Usually a corrugated-steel floor plate covers all this apparatus, so that it will not be unsightly and accumulate dirt, particularly when the turbine is installed, so that all this apparatus is below the floor level; i.e., when the top of the bedplate comes flush with the floor line.
Turn the bed bottom upwards, and stand the four supports, temporarily assembled, on it upside down and in their correct positions, and mark off for the 3/32-inch holes to be drilled in the bed. A hole 3/4 inch in diameter should be cut in the bedplate for the exhaust pipe, round a centre 2 inches from the end and 1-5/8 inches from the edge on the fly-wheel side, and two more holes for the pump.
At the rear end of the slide it traverses upon two heavy cast-iron turned conical rollers, which are geared together and actuated by the winch handle and spur gear, seen in our engraving; by these the slide is practically held fast in any position on the bedplate.
When Frobisher and his lieutenant gained the wave-swept deck, the first faint glimmerings of coming dawn were just appearing away to the eastward, and objects close at hand were beginning to take on recognisable form in the ghostly, grey dawn light; so that, although all the lamps in the ship had gone out with the stoppage of the dynamo, which had been jolted from its bedplate at the first shock, it was to some slight extent possible to see what was happening, and to dodge the masses of wreckage which were being hurled hither and thither about the decks.
Upon the platform of the casemate, or deck of the ship, or turret, is laid the heavy bed or traverse plate, cast hollow in iron, holding the vertical pivot at its forward end, on which the gun slide traverses in azimuth, and at its rear end the segment plate, bolted down and separately adjustable as to position upon the bedplate.
One end of the bedplate only is shown; B is a cast-iron partition dividing the oil chamber C from the oil-cooling chamber D. Castings of this kind have sometimes a tendency to sponginess and the trouble consequent upon this weakness would take the form of leakage between the two chambers.
Thus, within a period of usually less than one second, the steam is entirely shut off from the turbine when the speed has exceeded 7 or 8 per cent of the normal. The Oiling System Mounted on the end of the bedplate is the oil pump, operated from the main shaft of the turbine as previously stated.
Make a punch mark on the bedplate, and using this as centre for one of the points, describe an arc of a circle with the other. This will give the exact centre for the other cup. It is evident that if points and cup centres do not coincide exactly there must be a certain amount of jamming and consequent friction. For the same reason the V slots in the ring support should be worked out together.
Cut off for the guides, G1 G2, two pieces of stout brass strip, 2-1/2 inches long and 3/4 inch wide. The feet are then turned over and a third hole bored in G1, midway between those previously made, to take the end of the support, PP, of the rocking lever. Screw G1 G2 down to the bedplate, 3/4 inch away from the cylinder centre line.
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