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    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.

    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.

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Category Information : Charter Schools

This is our Charter Schools category. If you are interested in Charter Schools, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.
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Website preview thumbnail for : Utah CharterSchools
The goal of charter schools is to provide additional educational options with quality outcomes for students and parents. Charter schools are public schools open to all students.
http://www.schools.utah.gov/charterschools
Website preview thumbnail for : Monte del Sol Charter School
Was initially granted for five years in December 1999. The school opened in August 2000 under the leadership of founding Head Learner, Tony Gerlicz. That year, 121 students were enrolled in seventh...
http://www.montedelsol.org
Website preview thumbnail for : Manhattan Charter School
Operates two schools on New York City’s Lower East Side, each committed to providing its students with the tools and support necessary for success. Our two small public elementary schools ed...
http://www.manhattancharterschool.org
Website preview thumbnail for : Canyon Rim Elementary
Academic excellence is within reach at Canyon Rim Academy, a new public K-6 charter school located below Parley’s Canyon. Canyon Rim Academy is nestled in the quiet Canyon Rim community of S...
http://www.canyonrimacademy.org

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Website preview thumbnail for : Ferienwohnung Kluntjes Greetsiel
Komfortable Nichtraucher Ferienwohnung im Herzen vom schoenen Fischerdorf Greetsiel.
http://www.greetsiel-feriendomizil.de
Website preview thumbnail for : Its A Baby
We are a Bury UK based retailer of a wide range of baby and children's products. We specialise in offering prams & pushchairs.
http://www.itsababy.co.uk
Website preview thumbnail for : Adventure Balloons
Champagne hot air Balloon flights over Berkshire, Hampshire, Hertfordshire, Oxford, Surrey and London. The perfect surprise gift for that special occasion - Birthday Presents, Valentine Surprises, ...
http://www.adventureballoons.co.uk
Website preview thumbnail for : Kidzter
A lots of free online games and other free games are available at kidztar. Therefore it is the best place for your kid's entertainment.
http://www.kidzter.com

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Unfortunately just like humans our pets will age too. With the aging process comes health problems and with health problems comes very expensive vet bills. Research you dog
Just a line to say I'm living, That I'm not among the dead Though I'm getting more forgetful And more mixed up in the head.
No matter what else you are doing from cradle days through to the end, You're writing your Life's secret story, Each night sees another page penned.
The course of the River Thames as we know it today was created about 10,000 years ago, by melt water from the ice-sheets that covered much of the United Kingdom during the last ice-age...

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