Instead of heating strips of metal and welding the edges together, tubes may now be made seamless by rolling the heated metal around a solid heated rod; or by placing a hot ingot in a die and forcing a mandrel through the ingot.
In 1862 he exhibited in London an ingot of finest crucible steel weighing twenty-one tons.
The ingot destined to form the tube has first to undergo a prolonged forging under the steam-hammers, by which the utmost condensation of its particles is effected.
The ingot was weighed, and was found to contain fifty-two ounces.
It was obvious that the ingot was base bullion, and on the face of the affair there was clear proof that the Tartar had sold it.
The ingot was handed round, and all the clerks saw that indeed it was base bullion.
This stone also contains a small bevelled ingot or sample mould, 4 inches long, 2 inches wide, and 1¼ inches deep.
Like the mould-stone in the ruin below, it contains a sample ingot mould 3½ inches long, 3 inches wide, and 2 inches deep.
The bars of gold are stamped with a trade-mark, and pieces are cut off eachingot to be sent to the assayer for his report.
This is next put through a drying process, put in another retort, when the gold can be seen, poured into a mold, and dumped on a floor in ingot form.
The shape of an ingot is similar to a sponge cake, narrower at the bottom than at the top.
Ingot metal or mild steel was sometimes treacherous when first introduced, and accidents occurred, the causes of which were obscure.
Here, for instance, is a rough ingot of copper of cruciform shape, which was used as money in East Central Africa, and represents what would be equivalent to a very heavy balance at an English bank account.
Sometimes the silver takes the bar oringot shape, and is then termed Nen.
In the manufacture of wire, the metal from which it is to be made is first cast or wrought into an ingot (A, fig.
The ingot and crust together represent sixty-four parts of the original ninety-two parts of lime and coke, the remaining twenty-eight parts being liberated as carbon-monoxide gas.
When this mixture has been subjected to the heat of the electric furnace for a short time an ingot of pure calcium carbide is formed, surrounded by a crust of less pure material.
Acid open hearth steel is made in ingot form in special furnaces.
When in due course the ingot comes to the "blooming mill" it is fourteen inches thick each way and five feet long.
The ingot seemed almost a living thing; it did not want to run this mad course, but it was in the grip of fate, it was tumbled on, screeching and clanking and shivering in protest.
By and by they came to the place where steel rails were made; and Jurgis heard a toot behind him, and jumped out of the way of a car with a white-hot ingot upon it, the size of a man's body.
There was a sudden crash and the car came to a halt, and the ingot toppled out upon a moving platform, where steel fingers and arms seized hold of it, punching it and prodding it into place, and hurrying it into the grip of huge rollers.
Carry thisingot to the market and sell it and take the price in haste and speak not.
Moreover, he cleared another chest and laying therein all Hasan's valuables, together with the piece of the first gold-lump and the second ingot which he had made locked it with a padlock.
The ingot is next cleaned, and rolled to the proper thinness between cylinders as described under MINT; being in its progress of lamination frequently annealed on a small reverberatory hearth.
The ingot is taken out and annealed in hot ashes, which both soften it and free it from grease.
If the ingot of silver to be assayed is found to contain a greater quantity of mercury, one thousandth for example, the humid process ought either to be given up in this case, or to be compared with cupellation.
When the ingot is cold, the French gold-beaters hammer it out on a mass of steel 4 inches long and 3 broad.
Whenever the metal has solidified in the mould, the wedges that tighten its rings are driven out, lest the shrinkage of the ingot should cause the mould to crack.
The ingot is placed immediately upon the cokes, the door is shut, and the plater watches at the peep-hole the instant when the proper soldering temperature is attained.
The ingot thus prepared is brought to the plating furnace.
The composition thus made is to be put in the proportion of one pig or ingot into 1000 pounds of melted ordinary lead.
The ingot is now dressed carefully with the file on one or two faces, according as it is to be single or double plated.
The workman reduces the ingot to the thickness of 1/6 of an inch at most; and during this Operation he anneals it whenever its substance becomes hard and apt to crack.
XVIII, gave form to the ingot from which the sides of the canteen-shaped tobacco-case (Fig.
Each mould is cut approximately in the shape of the article which is to be wrought out of the ingot cast in it, and it is greased with suet before the metal is poured in.
The ingot cast for the receptacle was beaten into a plate (triangular in shape, with obtuse corners), of a size which the smith guessed would be large enough for his purpose.
XVIII, was cast the ingot from which was wrought the arrow-shaped handle of the powder-charger shown in Pl.
We then extract one ingot after another at successively lower temperatures and chill each ingot by dropping it into water or by some other method of very rapid cooling.
When the ingot has been made and the crucible is full, the latter is withdrawn and another substituted.
An ingot gradually builds up from the bottom of the crucible, the carbon electrode being raised from time to time automatically or by hand to suit the diminution of resistance due to the shortening of the arc by the rising ingot.
The two principal processes utilized in making calcium carbide by electrical power are the ingot process and the tapping process.
The run carbide, however, is never so rich as the ingot carbide, since an excess of lime is nearly always used in the mixture to act as a flux, and this remaining in the carbide lowers its gas-yielding power.
The chilling stereotypes the structure existing in the ingot at the moment it was withdrawn from the furnace, and we can afterwards study this structure by means of the microscope.
The good fairy brought an ingot of lead and an ingot of gold and laid them before him.
And from the fire he took up his matter And in the ingot put it with merry cheer.
Ingot mold, a box or mold in which ingots are cast.
This is passing heavy--an ingot of lead, by the feel.
An ingot of shell-steel is first cast as described in an earlier chapter.
Since impurities are apt to rise, while the metal is liquid, the top of the ingot is always cut off and discarded.
A few passages through this machine transforms theingot into a thick round bar.
Of actual Roman remains all we have is a couple of coins of the end of the fourth century (probably minted at Constantinople), a silver ingot of the same period, and a funeral inscription.
But history is bound to a greater caution, and it must be reluctantly admitted that the two coins, the ingot and the bit of stone are insufficient to prove the existence of a Roman fortress.
If the ingot or bar is small, cut it through and file the section.
In other cases of fused metal there is expansion instead of contraction in this final stage of the solidification, and the enriched alloy then causes the upper face of the ingot to bulge outwards.
The shrinking of the last part to become solid is further shown by the collapse of the surface of the ingot where weakest; that is, a furrow is formed on the flat surface.
There the ingot of tin is freed from slag and then taken to the scales.
