Some very interesting brass castings come from Lagos, not at all unlike the Benin modelling, except that they are in brass instead of pure copper.
The modern castings are rougher and not so decorative or beautifully designed as the tooled castings of earlier days.
Some of the cleverest castings of bronze, however, are found in the work of Eastern nations, the best examples being idols and temple ornaments (see Chapter XIV).
The metal castings from Central Sudan, representing ostriches, giraffes, and camels, are cleverly done, and with bangles and anklets make up an interesting group.
Such objects, however, are unfortunately too often intermixed with modern castings and copies offered unblushingly by the dealer to the unwary.
Pouring the Metal] If, after being poured, the mold sputters and emits large volumes of steam, it shows that the sand is too wet, and the castings in such cases will probably be imperfect and full of holes.
Then bolt the castings together, screw down, and connect to the boiler.
One of the easiest metals to melt and one which makes very attractive castings is pure tin.
Tin melts at a temperature slightly above the melting point of solder, and, although somewhat expensive, the permanent brightness and silver-like appearance of the castings is very desirable.
Cleaning Brass [407] Small brass castings can be cleaned by heating them slightly and then dipping them in a solution of sal ammoniac.
Dressers to dress the rough edges off the castings when brought from the foundry.
This includes the time occupied in moulding, for all the castings were made on the premises, with the exception of the steel wheels.
The castings are put together as they come from the foundry, without machining or fitting of any kind, the axle bedding well into the cast-iron box after a few days’ wear.
Its variable amount has to be borne in mind in making light and heavy-castings, and castings with or without cores, for massive cores retard shrinkage.
Some few exceptions occur, to be noted presently, but the above statement is true of perhaps 98% of all castings produced.
Of course it may be argued that, with such a design, the entire set must be replaced if a single cylinder is damaged, but castings have been so improved that an accident or imperfection requiring the renewal of a cylinder is very rare.
Numerous cases are on record in which cylinder heads have been blown off or castings cracked by the force of some of the explosions when too much "dope" has found its way into the mixture.
The wooden model of the new machine is finished already, and the castings put together.
There was nothing of the sort along the shore, though they searched it for some distance; but opposite the foundry they came upon a pile of the square wooden sand-boxes in which castings are made.
Beyond it lay the yard of an iron foundry, with great piles of castings scattered about and a tall building looming at their left.
Castings after solidifying contract in cooling about 1/8 of an inch per foot.
The grey iron, therefore, makes finercastings than the white.
Castings possessing various degrees of strength and hardness are produced by melting mixtures of various proportions of white and grey cast irons.
The pneumatic sand-jet is used for a variety of purposes: for cleaning off old paint, or the weathered surface of stonework; for polishing up castings and forgings after they have been brazed.
Then, again, a wide field is open to it for transmitting light articles, such as castings and parts of machinery, from one part of a foundry or manufactory to another, or from factory to vessel or truck for shipment.
The hydraulic cylinders are carried by large castings resting on the girders, each having a central opening to receive a cylinder, which passes down between the piers.
Compared to the volume of kitchen waste that will go into a worm box, the amount of castings you end up with will be small, though potent.
By laboratory analysis, the castings contain three or four times as much nitrogen as the crude compost being fed to the worms.
Differences in bedding, temperature, moisture, and the composition of your kitchen's garbage will control how long it takes but eventually you must separate the worms from their castings and put them into fresh bedding.
Darwin said this was the work of earthworms, depositing castings that "sooner or later spread out and cover any object left on the surface.
The lower portion of these mounds is pure castings while the worm activity stays closer to the surface where food is available.
The castings below are considered finished compost.
Apartment dwellers could use worm castings to raise magnificent house plants or scatter surplus casts under the ornamentals or atop the lawn around their buildings or in the local park.
The rest was an excellent batch of worm castings and a very few hardy, undernourished worms.
In making patterns for aluminum castings provision must be made for shrinkage to a greater extent than with any other metal or alloy.
A group ofcastings made in the same mold and connected by sprues formed in the runner and its branches.
A stiff wire brush for cleaning iron castings and other metal.
The heavy castings of which the engine was made up are accounted for by the necessity for considering foundry practice of the time, for in 1897 castings were far below the present-day standard.
The cylinders of this first Wright engine were separate castings of steel, and only the barrels were jacketed, this being done by fixing loose, thin aluminium covers round the outside of each cylinder.
He moved the pieces of old castings and he literally fingered the shed from end to end.
Suppose,' I said, 'that this man with the heavy load wished to mislead us; suppose that instead of bringing something here he took one of these old castings away?
They are covered by the castings of the earthworms, the dirt thrown out by burrowing animals and scratching birds.
Near the tumblers are the grinding wheels, upon which are ground off the rough edges and the castings put into shape for the machine shop.
These presses blank out and draw from sheet steel of special analysis, a large number of parts (which in ordinary practice are made from castings or forgings), carrying the same strength, but also very much lighter in weight.
The molders who make the molds for the castings are stationed alongside of these conveyors; the molding sand with which they fill the flasks is stored overhead in a hopper, the gate of which discharges directly onto the molding machine.
The framework in which the motor was placed consisted of a double “hollow square” of steel tubing, joined at the rear corners by steel castings and by malleable castings in front.
This shakes all the sand from the castings and they come out clean and bright.
American competition incastings has, so far as the lock trade is concerned, considerably diminished since 1865.
Iron castings are also annealed by packing with cinders in a box, which is then heated for some time, as with the malleable cast iron.
A special feature in the process of casting in our district is the production of “chilled” castings for rolls.
While in the matter of cheap and clear castings they have maintained for their productions the reputation for practical qualities which has so long distinguished them.
Heavy steel castings are bolted to it to take the threads of the machine-steel rods which form the saddles on which the mortar is suspended.
Patterns were made and sent to Coalbrookdale to be cast; but when the castings were received, they were found exceedingly imperfect, and were thrown aside as useless.
His castings were the largest until then attempted, and the boring machinery which he invented was the best of its kind.
All the castings for Boulton and Watt’s large Cornish engines were manufactured by him, previous to the erection of the Soho foundry.
He also constructed a lift worked by compressed air, which raised and lowered thecastings from the Boring-mill to the level of the Foundry and the Canal Bank.
Broadly speaking, the materials which are now employed in the manufacture of the cores of electromagnets for technical purposes of various kinds may be said to fall into three classes, namely, forgings, castings and stampings.
In some of the mild-steel castings used for dynamo electromagnets it appears that the total foreign matter, including carbon, manganese and silicon, is not more than 0.
It will be seen from the figures and the description of the materials that the steel forgings and castings have a remarkably high permeability under small magnetizing force.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "castings" in a variety of sentences. We hope that you will now be able to make sentences using this word.
