Posts Tagged ‘United States of America’
Tips Of Collecting Silver Buffalo Coin
For coin collectors seeking the Silver Buffalo Coin, getting a coin in excellent condition is of the utmost importance. A commemorative Silver Buffalo Coin was created in 2001 which consists of approximately 90 percent pure silver. The commemorative coin is a replica of the original Buffalo Nickel first created by James Earle Fraser and cast between 1913 and 1938. On the front of the Buffalo nickel appeared the profile of a Native American and on the back a standing buffalo is visible. The same design appears on the commemorative coins created in 2001.
The commemorative Silver Buffalo Coin is fully endorsed and backed by the United States Mint. It is possible for buyers come across counterfeits of 2001 Silver Buffalo Coin in the market. One will find on genuine coins that the backside of the coin is inscribed with the words “IN GOD WE TRUST,” just beneath the words “United States of America.” The latter text is arched above the buffalo on the back of the coin. Just beneath the buffalo’s head on the coin, the words “E Plubribus Unum,” the Latin phrase meaning “Out of Many, One” appears. The latter words are indicative of genuine commemorative coins as such an inscription is not inscribed on replications.
On a genuine Silver Buffalo Coin, coin collectors can also easily spot the specific denomination just below the buffalo on the obverse side of the coin which should clearly read “One Dollar.” Replications may display the words “giant buffalo proof” where the denomination amount appears on genuine coins. In addition, just below the denomination indicator on the obverse side of the coin, one will find the letter “P” which is an indicator of what mint cast the Silver Buffalo coin as well as the letter “F” which is indicative of the coin’s original designer. The uncirculated version of silver Buffalo coin is minted in Denver, CO, with a “D” Mint Mark inscribed on the coin instead. Another clear clue that the coin is genuine is the fact that on the front side of the coin on the lower left is the engraved year: “2001.”
Careful examination of the Silver Buffalo Coin will give a coin collector a solid idea about what he or she is buying. It is easy to separate all of the replicas from the originals when one knows what to look for. Understanding the identifying markers will help the coin collector ensure he or she is getting a genuine coin in every instance. You can also subject it to the magnet test. A silver coin won’t be attracted to the magnet, but a fake steel coin would.
For more tips of collecting Silver Buffalo Coin, I recommend you checking out Buffalo coin for Sale. It is a specialized Buffalo Gold Coin for Sale site, offering a great selection of American gold Buffalo coins, silver Buffalo and Buffalo Nickels for sale. This website makes finding your dream American Buffalo Coin a million times easier. Be sure to try this website before you buy.
Wilson Snyder is a freelance writer. Learn more about Silver Buffalo Coin at Buy Buffalo coin.
Posted in Jewelry | 
Tags: Buffalo, Coin, Collecting, Denver, E Plubribus, Fraser, giant buffalo, James Earle, Mark, obverse side, SILVER, Silver Buffalo, Tips, United States, United States of America, Wilson | 
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Metal Casting Furnaces and Metal Casting Furnace Types Described
There are several types of casting furnaces which include Electric Arc furnaces, Blast furnaces, Cornwall Iron Furnace, etc. Here’s a quick review of some of them.
Electric Arc Furnace: This furnace can be described as a furnace heating charged materials by the way of an electric arc. These furnaces exist in all the sizes-right, from the smallest one having a capacity of around 1 ton to the largest one having a capacity of 400 tons. The former one is used in foundries to produce cast iron products, whereas the latter one is used for secondary steel making. The ones used by dentists and in research laboratories might be having capacity of a few grams only. The electric arc furnace can have temperatures risen up to 1800 Celsius. The first electric furnaces came into being in 1907, at the hands of Paul Heroult of French origin. The commercial part of these furnaces was established in the United States of America. In the beginning, the specialty product used in the making of spring steel and machine tools was electric steel. Calcium Carbide was also prepared in these arc furnaces. It (calcium carbide) was used in carbide lamps.
This furnace comprises of a refractory-lined vessel, normally water-cooled in huge sizes, having a covering of a retractable roof, through which the entry of graphite electrodes takes place. They might be one or many in number. The furnace is divided into 3 sections: the shell, consisting of lower steel bowl and sidewalls, the hearth, consisting of refractory lining the lower bowl, and the roof, that can be water-cooled or refractory-lined, and can easily be shaped into a spherical section or conical section (frustum). A refractory delta is also supported by the roof at its center, by the way of which graphite electrodes make an entry.
The process of operation starts with delivery of scrap metal to scrap bay which is located adjoining melt shop. After that, the loading of scrap into huge buckets or baskets takes place. The next step is to carry this basket to the melt shop. The charging takes place here. After the completion of charging, let the electrodes be allowed to enter and placed onto scrap. This causes the arc to be struck. Lower voltage is preferred for this part (of operation) to provide protection to the walls and roof against arc damage and excessive heat. After having the electrodes reached the heavy melt, shielding of arcs by scrap takes place. This enables a rapid formation of molten pool, thereby decreasing tap-to-tap times. Oxygen is also allowed to enter.
Blast Furnace: It can be referred to as a kind of metallurgical furnace, through which the process of smelting takes place. This produces metals, normally iron. These furnaces trace their origin to China (around 500 BC). They were also found in Belgium and England later. They do not have any special mode of operation. The metals get melted by heating only. Generally, iron is melted in these furnaces. The chemical reaction can be explained as follows:
Fe2O3 + 3CO -> 2Fe + 3CO2
Bronze Metal Casting
Posted in Technology |
Tags: Arc, Belgium, China, Cornwall, cornwall iron furnace, electric arc furnace, electric arc furnaces, England, furnace, Kent, Paul Heroult, place, United States of America |
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