Search results
Results From The WOW.Com Content Network
John Hays Hammond Jr. and Sr., 1922. John Hays Hammond Jr. (April 13, 1888 – February 12, 1965) was an American inventor known as "The Father of Radio Control".Hammond's pioneering developments in electronic remote control are the foundation for all modern radio remote control devices, including modern missile guidance systems, unmanned aerial vehicles (UAVs), and the unmanned combat aerial ...
The problem of band noise with tape devices is reduced dramatically by the invention of radio frequency bias of Walter Weber and Hans-Joachim von Braunmühl. 1942: The first all-electronic computer is used by John Vincent Atanasoff, but quickly fades into oblivion. Four years later the ENIAC completed – the beginning of the end of ...
Marconi used this device as a radio detector. [when?] The Supreme Court of the United States would eventually invalidate the US patent because of an improper disclaimer and, additionally, maintained the technology in the patent was known art when filed. [167] This invention was the first vacuum tube.
Experiment to use human brain as a radio wave detector, 1902. The coherer's poor performance motivated a great deal of research to find better radio wave detectors, and many were invented. Some strange devices were tried; researchers experimented with using frog legs [24] and even a human brain [25] from a cadaver as detectors. [1] [26]
The phrase smart home refers to home automation devices that have internet access. Home automation, a broader category, includes any device that can be monitored or controlled via wireless radio signals, not just those having internet access. When connected with the Internet, home sensors and activation devices are an important constituent of ...
(Before that, the most common type of receiver was the crystal set, although some early radios used some type of amplification through electric current or battery.) Inventions of the triode amplifier, generator, and detector enabled audio radio. Westinghouse buys DeForest's and Armstrong's patent.
Telegraphy did not go away on radio. Instead, the degree of automation increased. On land-lines in the 1930s, teletypewriters automated encoding, and were adapted to pulse-code dialing to automate routing, a service called telex. For thirty years, telex was the cheapest form of long-distance communication, because up to 25 telex channels could ...
The coherer was the most successful of many detector devices that were tried in the early days of radio. The operation of the coherer is based on the phenomenon of electrical contact resistance . Specifically as metal particles cohere (cling together), they conduct electricity much better after being subjected to radio frequency electricity.