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TODAY IN HISTORY

    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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Kids' Scooters - A Great Gift :

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It's great to take kids outside to have some exercises rather than sitting in the couch for cartoons. A kid's electric scooter would make all kids excited.

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It's great to take kids outside to have some exercises rather than sitting in the couch for cartoons. A kid's electric scooter would make all kids excited.

Kid's electric scooters can be decorated to different looks with the striking bells and whistles to meet kids' desires. No matter what kind of scooters you are going to buy as a gift for your kids, it must follow the federal laws and safety guidelines.

All kid's scooters have a maximum carry weight. When you pick one for your kids, estimate the high weight tolerance your kids need. Choose the most suitable weight allowance would be the first step of your picking.

Kid's scooters always have a short battery life. Occasionally they could run less than an hour. The using time of battery would depend on the battery versions and the terrain. Riding a kid's scooter, helmets are must-have equipments. The speed of them is about 10-15 miles per hour, keep the safety would be every parents' responsibility. The prices of scooters for kids are ranging from 100 dollars to thousands of dollars. You can pick it according your budget.

There are different types of kid's scooters: sit down scooters are more comfortable and easy for kids to drive. There are also some storage areas for children to put the things in. The frames always use hard plastic with bright colors. Stand up scooters have a base for kids standing. They are also colorful but without the plastic shell. To keep the kids safe, some basic accessories such as helmets and pads are necessary. They can protect kids from some unavoidable crashes.

Before driving the electric scooters, you should teach your kids how to ride safely. Open spaces are best places for riding. When they come to the pavement, you should check the handle curbs and bumps first. Browse some reviews before pick the most suitable type for your child. According to your kid's age, you can select the best model for them. Read carefully of the age recommendations before ordering a gift for them. Choosing some scooters with adjustable seat would be best for your kids that they can ride in a much longer time.

Browse the catalogs and pictures with your kids together. Pick a favorite model of them would be a great gift that they can enjoy it for longer time. Children always lose their interests in some toys. So choosing as they like, would be a great way for them to ride the scooters for longer time.


Source : EzineArticles

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  • Bella Leah Swan
    is an online automotive article writer specializing on motorcycles, scooters and trikes. Know more about scooters and motorcycle related info in website.

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