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Updated: June 1, 2025
The "converter" is a huge pitcher-shaped vessel, hung upon trunnions so as to be tilted, and it is usual to admit through these trunnions, by means of a continuing pipe, the stream of air. The converters may contain ten tons or more of liquid metal at one time, which mass is converted from iron into steel at one operation.
The trunnion bearings, instead of being liable to heat like other journals, are kept down to the temperature of the steam by the flow of steam passing through them; and the trunnion packings are not liable to leak when the packings, before being introduced, are squeezed in a cylindrical mould. Q. Might not the eduction trunnions be immersed in water?
The cylinder is set immediately under the crank; the top of the piston rod is connected immediately to the crank pin; and, to enable the piston rod to accommodate itself to the movement of the crank, the cylinder is so constructed as to be susceptible of vibrating or oscillating upon two external axes or trunnions.
It is not expedient to cast the trunnion plummer blocks upon the lower frame, as is sometimes done; for the cylinders, being pressed from the steam trunnions by the steam, and drawn in the direction of the condenser by the vacuum, have a continual tendency to approach one another; and as they wear slightly toward midships, there would be no power of readjustment unless the plummer blocks were movable.
The guns of Fort Moultrie were hurriedly knocked from their trunnions, and spiked; the gun-carriages were piled in great heaps, and fired; and every thing that might in any way be used against the United States Government was destroyed. Then the work of evacuation was begun.
His chair, placed on a carved gun-carriage, was modelled upon the powerful proportions of a 32-inch mortar; it was pointed at an angle of 90 degs., and hung upon trunnions so that the president could use it as a rocking-chair, very agreeable in great heat.
Into the great slab of stone, presumably running through it from side to side, was set a round bar of metal the same bright metal of which the sword was made more than a foot in diameter; and this worked in two concave metal sockets in much the same manner that the sockets of a gun-carriage hold the trunnions of a gun.
The trunnion bearings are then turned, and are fitted into blocks of wood, in which they run while the packing space is being turned out. Where many oscillating engines are made, a lathe with four centres is used, which makes the use of straight edges in setting out the trunnions superfluous. Q. Will you explain how the slide valve of a marine engine is set?
Theoretically, the recoil is not so perfectly met as in some of the earlier Elswick designs, in which the presses were brought opposite to the trunnions, so that they acted symmetrically on each side of the center of resistance. The only man of the detachment even partly exposed is the number one, while laying the gun, and in that position he is nearly covered by the gun and fittings.
He had orders to make the artillery saw the trunnions of the cannon left behind, and bury them; to destroy the ammunition, to drive all the stragglers before him, and to blow up the towers which surrounded the city. Kutusoff, meanwhile, was waiting for us at some leagues distance from thence, and preparing to cut in pieces successively those remnants of corps thus extended and parcelled out.
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