Invented in 1857 by Joseph Cayetty, in the United States, curiously was considered a decadent sophistication in most "civilized countries". Until after the Second World War was its use is not widespread.
Patented as "Zip", was presented at the Exposition in Chicago in 1893. L invention of Whitcomb Judson, was to a sealing consisting of two chains of brackets that are linked to pull a kind of cursor.
Invention devised in 1894 by Daniel M. Cooper, character whose name has not gone down in history, especially among workers who to this day, with variations, continue to make use of his invention, a system was formed by a machine synchronized with a clock that showed, through a card, time of entry and exit of the worker. When he invented this "device" the workweek was six days. Patented as "Zip", was presented at the Exposition in Chicago in 1893. L invention of Whitcomb Judson, was to a sealing consisting of two chains of brackets that are linked to pull a kind of cursor.
The first radiograph of history is that of a woman's hand, such a privilege would correspond to the wife of the inventor, the German physician, Wilhelm Konrad Rotger a Dec. 22, 1895 would put his theories into practice. The principle on which the x-ray is based on the difference in the density of X-rays that reach the photographic plate, the more easily pass through soft tissue to the hard tissues. The invention or discovery was put into practice almost immediately. In World War I was used to locate foreign bodies in the tissues of wounded soldiers and to be able to exactly define the extent of fractures.
It was invented by the Norwegian Johann Vaal in 1900. Since then there has abandoned us. Great invention for simplicity and usefulness.
The first patent for a machine for automatic distribution of commercial products comes the year 1883. The inventor, the British Percival Everitt. While, until the thirties of this century and not commercially available later extended by the United States.
In 1879 Constantin Fahlberg and Ira Remsem worked on the synthesis of a derivative of tar. The discovery was considered the INVENTION include it as a food sweetener. It was the first synthetic sweetener, which until 1938 was sold only in pharmacies and on prescription.
In 1802 Josiah Wedgwood presintió the beginning of photography. It would be twenty-four years later, when Joseph Nicéphore Niépce, made the wonderful discovery, and almost from that moment, expressed his frustration at not being able to print color plates, in addition to other conditions that improved Daguerre few years later. But the first inventor who managed to reproduce the color was the British physicist James Clerk Maxwell, who in the year 1861 took three successive photographs of a Cockade of tartan through three color filters blue, green and red. After projected negatives obtained superimposed on a screen illuminated.
Patented in 1888 by John E Loud, the first pen was designed to write on hard surfaces. Seven years after the invention was marketed.
Invention of Ives W. McGaffey, an American, the invention was devised in 1871 for industrial use. It was based on a bomb trigger a propeller inverted, to be put into operation thanks to a steam engine. The invention evolved from the hands of British Hubert Cecil Booth, to install an electric motor. It was customary that the aircraft was manufactured and rent by the hour. In the early twentieth century, a watchdog of stores called J Murray Spangler and William H Hoover devised and marketed the first vacuum cleaner small and powered by an electric motor.
Conceived as a delivery system in 1888 by American Harold P. Brown and team leader Edison electricians, E. A Knneally, was tested on laboratory animals, being used for the first time in 1890 for a ajusticiar William Kemmler in New York. Twenty-five years after its invention had already been adopted as a delivery system so many other U.S. States. Automatic dishwashers Mrs. W. A. Cockran, born, it took ten years to create a marketable prototype of which would be the first automatic dishwashing. His efforts had begun in 1879. The operation was based on a steam engine, but it was so voluminous that it did not work in the market. It would not be until 1940 when he appeared in the first truly automatic dishwashers, and even the sixties were not coló in the kitchens of homes.
The checks were invention of the travel agency American Express, and date back to 1891. In fact, it was a variation of what came to be known as "credit card" letter allowing passengers to have an amount of money that is collected at the offices of a foreign country, which does not run risks Theft or loss of money.
Known first as "corneanas lenses," are the work of the German ophthalmologist A. E. Fick, 1887. At first they were not widely used and were manufactured with glass. It would be in 1936 when a German company also, I. G. Farben, the factories in plexiglass, lighter. However, he was in the mid-50s of the twentieth century when it became popular to use. Made of methacrylate, with a diameter smaller than the previous ones, earned in lightness and were more comfortable to use.