As it fills the bell, it raises it, and when the bell reaches a certain height, it trips a lever to the door which lets in the carbide and closes it.
When cooled slowly some carbide separates out more or less, and the steel is soft or annealed.
In steel when melted the carbide of iron is no doubt diffused equally throughout the liquid.
The carbide should be put in small containers, for each time a box is opened some of the contents turns into gas from contact with the moist air.
It has been found that for equal weight the carbide will give more light than kerosene or candle.
In the late evening Slip lighted a bigcarbide light and turned it toward the town on the opposite bank.
In forty minutes he was dipping his sweep blades to work his way into the eddy where several small passenger craft were on line-ends from a large, substantial craft which was brightly lighted by lanterns and a big carbide light.
Another valuable product of the electric furnace was the calciumcarbide first produced in 1892 by Thomas L.
This calcium carbide is the basis of acetylene gas, a powerful illuminant, and it is widely used in metallurgy, for welding and other purposes.
Calcium carbide as produced by this process is a dark-brown crystalline substance which may be heated to redness without danger or change.
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.
The carbide should be fed automatically into the water in proportion to the gas consumed.
For although it had been known as a possible illuminant for many years, the calcium carbide for producing it could not be manufactured economically until the advent of the electric furnace, itself the outcome of Davy's arc light.
Construction must be such that an addition to the charge of carbide can be made at any time without affecting the lights.
This chemist has found that the addition of fluorspar (CaF2) to the carbide reduces the temperature required for the absorption process by 400 degrees centigrade, while it also produces a less deliquescent finished material.
The secret of the cheap manufacture of the carbide lies in the fact that the extremely high temperature required--about 4500 deg.
One pound of purecarbide will produce five and one half cubic feet of gas of greater illuminating power than any other known gas.
But we've only got enough carbide to run the light to-night.
It will likely take several days to get it here, so I'll bring back enough carbide with me to run the light until it comes.
The acetylene traverses a purifying column, I, filled with pumice stone saturated with a solution of sulphate of copper and surmounted by a thin layer of carbide of calcium.
The acetylene is produced by the reaction of the water falling in small quantity upon the carbide contained in the gas generator, A.
In fact, the water cock may remain open before the holder has moved, and there may thus fall upon the carbide an excess of water, giving rise to a production of acetylene greater than the capacity of the holder warrants.
Mr. Trouvé has endeavored to remedy this inconvenience by arranging the pieces of carbide in the basket in distinct layers separated by disks of glass.
Mr. Dickerson rightly remarks that it is disadvantageous to directly control the distribution of the water upon the carbide by means of the holder of the gasometer.
When the carbideof the first compartment is exhausted, the water enters the second, and so on.
The quantity of carbide necessary to fill the gasometer is introduced into the basket.
It is necessary in this case that the carbide shall have been previously reduced to powder.
It carries a suspended open work basket containing the carbide of calcium.
The carbide falls into the generator, the bottom of which is open.
To evolve the gas it is necessary only to pour water upon the calcium carbide, when a union takes place between the carbon of the carbideand the hydrogen of the water in the proportions above stated.
The symbol for calcium carbideis CaC{2}, which means that a molecule of this carbide is compounded of one atom of calcium and two atoms of carbon.
A certain amount of the calcium carbide is placed in a gas-tight vessel containing water.
When the pressure is relieved through the consumption of the gas at the burners it allows the carbide to drop into the water, when the evolution of the gas begins again.
When the pressure on the inside of the vessel has reached a certain degree it is made, through mechanical contrivances, to lift the carbide out of the water and thus stop the evolution of the gas.
Calcium carbideis a compound of calcium and carbon.
As soon as the water comes in contact with the carbide the evolution of the gas begins.
This can C is filled about half full of broken pieces of carbide and then placed in the little can D.
The water then comes in contact with the carbide and forms gas, which expands and stops the lowering of tank A.
The production of carbide of calcium followed in 1862, and also the invention of the Gatling gun.
Cartridges or "sticks" of carbide are also made without wrappings, either by moistening powdered carbide with oil and compressing the whole into moulds, or by compressing dry carbide dust and immersing the sticks in oil or molten grease.
The generator is first filled with water to the crown of the cover, and carbide is then thrown into the water by hand through the gas-tight lock, which is opened and closed as required by the horizontal handle P.
It is discharged into the uppermost of the compartments of the carbide trough, and when the carbide in that compartment is exhausted it flows over the partition into the next compartment, and so on until the whole trough is flooded.
The latter idea, at least, fulfils its promises, and does keep the carbide to a large extent unchanged if the lumps are exposed to damp air, while solving certain troubles otherwise met with in some generators (cf.
Assuming all the necessary data known, as happens to be the case in the present instance, it is also possible to calculate theoretically the heat which should be evolved on decomposing calcium carbide by means of water.
In either case, the method of estimation is the same, but in the first, acetylene should be specially generated from a small representative sample of the carbide and led directly into the apparatus for the absorption of the phosphine.
Separate from the mass any unslacked carbide remaining and return it to the containers, adding now carbide as required.
Another is that certain volcanic rocks which are known to contain carbide of iron might, under the influence of steam, have in bygone ages given off petroleum, or paraffin, to use the other name for the same thing.
When water comes into contact with the carbide the partnership is broken, but the heat is not liberated then, since another partnership is formed, which still retains the old heat-capital.
In acetylene gas apparatus a great variety of methods are employed for bringing the water and carbide into contact.
Production of Calcium Carbide in Electric Furnace by Willson.
It was not, however, until the electrical furnace became an agency in chemical reaction that calcium carbide was made on a commercial scale.
Instead of the automatic pressure level principle described, many devices discharge a regulated quantity of powdered calcium carbide into the water, while in another form the water is discharged upon the calcium carbide.
Calcium carbide is now made in a large way by the Willson Aluminum Company, at Spray, N.
A number of receptacles containing charges of calcium carbide are made to successively receive a regulated quantity of water, the gas being collected in a rising and falling holder.
When so drawn off, the pressure in the inner cylinder is relieved, and the water therein rises to contact again with the calcium carbide and renews the generation of gas.
It has been suggested that deep within the earth carbon is combined with iron in the form of an iron carbide, and that from the iron carbide are generated the hydrocarbons of the oil, either by or without the agency of water.
Iron carbide is magnetic, and significance has been attached to the general correspondence between the locations of oil in the western United States and regions of magnetic disturbance.
North American Carbide & Metals can produce these units cheaply, and at a rate that will enable us to convert every ship in the Navy within the year.
The North American Carbide & Metals technicians set up the circuits that were connected to the electrodes without any help from Sorensen.
And how did it come to the attention of North American Carbide & Metals?
Sorensen had obligingly brought the suitcase to the main testing and development laboratory of North American Carbide & Metals.
They were small, rechargeable nickel-cadmium cells, and every one bore the trademark of North American Carbide & Metals!
By some mysterious combination of misfortune, too, the carbide in the lamp, which had not been renewed since they left Santa Barbara, gave out with a flicker and a fizz at this moment.
It was an improved carbide contrivance, the illuminant which made the gas being carried in its socket.
Ambulance work depends on the supply of gasoline, oil, carbide and spare parts, solid rations and sleep.
Gasoline, oil andcarbide ran low; we used all our spare tires.
Those in which the carbide is dropped or plunged into an excess of water.
The action of the carbide as a germicide depends on its decomposition by the moisture of the soil, forming acetylene, which kills the Phylloxera.
Eight to nine pounds of carbide per horse power in twenty-four hours, averaging five cubic feet of acetylene, is considered satisfactory work.
Foreign makers break and blend ingot and crust to standard size, the best makers guaranteeing their carbide ninety per cent pure, giving five cubic feet of acetylene per pound (pure carbide gives 5.
Lewes first determined the amount of heat developed by the decomposition of carbide by water, and the conditions which tend to lessen or increase the intensity of the reaction.
Some steel works are now using carbidefor this purpose.
The float A in the tank (a) is a safety device that prevents the introduction of carbide unless the tank contains a full supply of water.
When the water is withdrawn from the generator, the float falls and the cup shuts off the carbide outlet.
The carbide itself has no odor, but in the air it is always attended by the penetrating odor of acetylene, because of the gas liberated by the moisture absorbed from the air.
In the generation of acetylene, exact weights of carbide and water always enter into combination, i.
The first method, that in which thecarbide is dropped into water, is shown in Fig.
Because of the fact that the greater number of acetylene-gas machines of today are of the “carbide to water” type, in the description to follow that type of machine is used.
Immediately the water begins to combine with the carbide and the bubbles of gas pass up through the water and are conducted into the tank B.
The float is a hollow metal cylinder connected by a rod to a hinged cup under the bottom opening of the carbide holder.
If protected from moisture, calcium carbide cannot take fire, being like lime in this respect; it is therefore a safe substance to store.
Calcium carbide is a product resulting from the union of lime and coke, fused in an electric furnace to form a grayish-brown mass.
If this machine were provided with the proper mechanism to feed into the generator a supply of carbide whenever the gas in the holder is exhausted, the machine would represent the modern “carbide to water” generator.
A supply of carbide S is placed in the generator and water from a tank C is allowed to drip or spray onto the carbide.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "carbide" in a variety of sentences. We hope that you will now be able to make sentences using this word.
