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    DRY-CELL PATENT
    November 15, 1887 - U.S.A.

    German scientist, Dr. Carl Gassner, was issued a U.S. patent (No. 373,064), the first in the U.S. for a "dry" cell. Gassner had already patented his invention in Germany (No. 37,758) on 8 Apr 1886, and also in Austria, Belgium, England, France and Hungary in the same year. The sealed zinc shell which contained all the chemicals was also the negative electrode. Later, he improved the shelf life of the battery by adding zinc chloride to the electrolyte to reduce corrosion of the zinc shell. Gassner's battery was much like the carbon-zinc, general-purpose batteries sold today. By 1896, the National Carbide Company (later Union Carbide and Eveready) produced the first consumer dry cell battery. Two years later, the company made the first D cell.

    ALKALINE DRY-CELL PATENT
    November 15, 1960 - U.S.A.

    A U.S. patent was issued for an alkaline dry-cell to P.A. Marsal, Karl Kordesch and Lewis F. Urry who assigned it to the Union Carbide Corporation, the manufacturer of Eveready batteries (No. 2,960,558). Compared to the existing carbon-zinc dry-cells, it offered an appreciable increase in life-span and efficiency during heavy continuous drains. Its construction used an alkaline electrolyte, manganese dioxide as depolarizer, a zinc powder-gel anode, and certain additives such including mercury and electrolyte-creep inhibitors. The patent gave practical details for commercial production. The patent claimed that whereas four cells in series of the carbon-zinc type gave 4.5 volts to power a 1.25-amp bulb for 45-min to 1-hr, the new alkaline design gave good brilliance after 6 to 7 hours.

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RANDOM QUOTES

  • Rules for Happiness
    by Immanuel Kant

    "...Rules for Happiness: Something to do, Someone to love, Something to hope for...."
  • All of us have a God in us
    by Earth Day, Kenya

    "...All of us have a God in us, and that God is the spirit that unites all life, everything that is on this planet. It must be this voice that is telling me to do something, and I am sure it'as the same voice that is speaking to everybody on this planet at least everybody who seems to be concerned about the fate of the world, the fate of this planet. Wangari Maathai-Noble Peace prize winner, Deputy Minister of Environment, founder Green Belt movement in Kenya...."

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  • Harvard Medical School
    about Eyesight Myth and Fact

    Myth: Staring at a computer screen all day is harmful to the eyes. Fact: Spending the day staring at a screen can tire or strain your eyes, but it will not hurt them. Make sure lighting doesn't create a glare on your screen. When spending long periods at your keyboard, take a break now and then to rest your eyes to reduce fatigue. Also, don't forget to blink. Your eyes need to stay lubricated to feel comfortable. Drug Abuse
    about Facts about Drugs

    Facts about drugs can protect against drug abuse. Legal drugs, such as alcohol and tobacco, kill more people than illegal drugs. Tobacco (smoking cigarettes) kills more people than any other drug. Illegal drugs including heroin, cannabis, ecstasy and amphetamines can have unknown or dangerous ingredients. Mixing drugs, especially with alcohol, can be fatal.

Choosing a wedding ring :

Choose Your Color :

ARTICLE INFORMATION :

While you are purchasing a wedding ring the texture, color and shapes of the rigs are the important factors which you have to take care of. If you consider all these matters you are sure to be gainer.

ARTICLE CONTENT :

If we say a "wedding ring" then it sounds very simple. It is a thing that the bride and groom exchange on their wedding day. But if we think deeply then we can understand that it is something that binds the husband and the wife throughout their lifetime. If we think thus, it becomes a matter of great importance. It becomes obvious that everyone must be conscious while choosing the wedding ring for their loved ones. It will be with them forever as the sweet memory of their wedding day.

There are certain aspects of a wedding ring that should be paid attention to. Wedding rings differ from each other in color, texture, shape and size. These facts may create problems for you when you go to market for buying a wedding ring. So it is better for you that you make your mind up and then visit any store. This article will hopefully help you in this matter.

At first the wedding rings are different from each other in their base metal. Some are made of yellow gold or white gold or silver; some are made of platinum or titanium or tungsten. These metals vary in their cost.

The color of the rings differs according to the color of the metal. If it is normal gold, then the color will be yellowish. Now-a-days white gold is available in the market. White gold is developed when palladium and silver are alloyed with gold. Platinum and titanium are also white metals. Titanium is cheaper than platinum. For this titanium wedding rings are becoming popular day by day.

The wedding rings are found in the market in various shapes. It depends on you to choose the perfect one. You should at first visit any jewelry store or simply visit the online stores staying at home. This inspection will help you to have a clear idea about the thousands of models. To do this through internet is the best way. If you visit any online store, the online merchants are able to show a huge number of models throughout the whole world.

In the market many types of designs are available. There are solid rings as well as rings of intricate designs with subtle finishing. Some wedding rings are decorated with diamond or other precious stones. You may like white stones as diamond or you may also like the colorful stones. There are many colorful stones like ruby, sapphire, emerald etc.

These are all the types of wedding rings. When you are purchasing the ring you should keep in knowledge all these information. But the most important thing that you should not forget is the personality of your partner, and his or her choice.

You must choose the metal of the wedding ring with great care. Some of the metals are not at all suitable for the sensitive kind of skin. They can be the cause of skin rashes or skin allergy. The wedding ring is worn by everybody till their last breath. So this is a vital factor to be taken care of.

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  • November 30, 2014Date Added :
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