VACUUM TUBE
October 20, 1906 - American Institute, U.S.A.
Dr. Lee DeForest (26 Aug 1873 - 30 Jun 1961), one of the “fathers of radio,'' announced his three-element electrical vacuum tube (now known as a triode) to a meeting of the American Institute of Electrical Engineers He had discovered that when a mesh, or grid, of wire was placed between the filament and collector “plate†in a diode tube (first made by J. Ambrose Fleming, 1904), a large voltage-amplifying effect could be produced. DeForest patented this vacuum tube on 15 Jan 1907. The ability of this tube to amplifiy weak signals was an invention as great as radio itself, because it made long-distance communication possible.
DIFFERENTIAL ANALYSER
October 20, 1927 - U.S.A.
A new electrical machine with a mechanical mind has been perfected at Massachusetts Institute of Technology / MIT by Professor Vannevar Bush which can solve problems to complex for human engineers. The Product a differential analyser allows the mathematician or engineer to feed in the equation and parts of the problem which cannot be solved by formal mathematics. The machine can take from 8 minutes to several hours to provide the answer which man alone can not solve today.
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Besides lung cancer, tobacco use also increases the risk for cancers of the mouth, lips, nasal cavity (nose) and sinuses, larynx (voice box), pharynx (throat), esophagus (swallowing tube), stomach, pancreas, kidney, bladder, uterus, cervix, colon/rectum, ovary (mucinous), and acute myeloid leukemia.
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Category Information : Motorcycles - ATVs
This is our Motorcycles - ATVs category. If you are interested in Motorcycles - ATVs, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.
Was founded in 2000, when Nick Trask followed his passion for motorcycles and performance, from New Zealand to the United States. Nick knew that the only way to make his vision a reality, was to ri...
Buy Motorcycle helmets, motorcycle apparel and motorcycle parts for Cruisers, Sport Bikes, Touring Bikes and Scooters. Offers replacement parts for all motorcycle helmets, free shipping with minimu...
The Motorcycle Views Web site contains original articles and features about motorcycles including motorcycle quizzes, a motorcycle forum, a motorcycle newsletter, a motorcycle blog, a motorcycle gl...
Book cheap Bermuda scooter and moped rentals on Elbow Beach Cycles. Guaranteed lowest rates on frugal compact bikes, environmentally friendly green electric bikes.
The Harley Davidson Brand name has come to be arguably one of the most recognized motorcycle names internationally. With over 300 motorcycle manufacturers, the Harley has emerged as one of the greatest in the motorcycle business.
There are many options available to the burgeoning motorcycle riding enthusiast. There is help though. The following tips will help to point a beginner in the right direction. Hopefully you will come to enjoy motorcycle riding like so many other people in this world.
Drs. Richards and Miller care for a pediatric dental practice dedicated to providing dental care, education and community service to Lake County and surrounding areas.
A group of people with the same desire to help rescue and save small breed dogs from high-kill shelters throughout the united states and find them loving forever homes. We are always looking for vo...
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, ...
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