|
Charles Jenkins Laboratories
Charles Jenkins Laboratories was founded in by Charles Francis Jenkins, developer of the Phantoscope, the first commercial tv station W3XK and the first commercial television company. History Charles Francis Jenkins in 1890 moved to Washington D.C. to work as an Steganographer, then he experimented with motion pictures and in 1890 developed a movie projector called the Phantoscope, the laboratory was created years after it. Transmission of Pictures over Wireless In March 13, 1922 Charles Jenkins filed the U.S. patent No. 1,544,156 for Transmition of Pictures over Wireless, it was granted on June 30, 1925. W3XK, the first commercial TV station in the US In 1928 Charles Jenkins was granted the first commercial television license in the United States and In July 2, 1928 Jenkins Television Corporation started to operate W3XK, the first TV station. first aired from Jenkins Labs in Washington and from 1929 on from Wheaton, Maryland, five nights a week. At first, the station ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Francis Jenkins
Charles Francis Jenkins (August 22, 1867 – June 6, 1934) was an American engineer who was a pioneer of early cinema and one of the inventors of television, though he used mechanical rather than electronic technologies. His businesses included Charles Jenkins Laboratories and Jenkins Television Corporation (the corporation being founded in 1928, the year the Laboratories were granted the first commercial television license in the United States). Over 400 patents were issued to Jenkins, many for his inventions related to motion pictures and television . Jenkins was born in Dayton, Ohio, grew up near Richmond, Indiana, where he went to school and went to Washington, D.C. in 1890, where he worked as a stenographer. Motion pictures Jenkins started experimenting with motion pictures in 1891, and eventually quit his job and concentrated fully on the development of his own movie projector, the Phantoscope. As the ''Richmond Telegram'' reported on June 6, 1894, about his endeavo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phantoscope
The Phantoscope was a film projection machine, a creation of Charles Francis Jenkins and Thomas Armat. In the early 1890, Jenkins began creating the projector. He later met Thomas Armat, who provided financial backing and assisted with necessary modifications. On September 25, 1895, Jenkins and Armat began the presentation of their completed Phantoscopes at the Cotton States Exposition in Atlanta, Georgia. Their presentation continued for the next eighteen days, during which the increased strain causes conflicts. Tensions escalated when, on October 13, Jenkins borrowed one of their three completed Phantoscopes. He intended to present the invention in his hometown of Indiana, and promised to return the machine by October 25. He did not, and instead, remained in Indiana Armat decided to leave the exhibit with their remaining Phantoscope, after a fire destroyed several exhibits and another of their Phantoscopes. What followed was a lengthy court battle in which Jenkins sought a solo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palladium-Item
The ''Palladium-Item'' is the daily morning newspaper for Richmond, Indiana, and surrounding areas. The paper is a merger of two older papers, the ''Richmond Palladium'' and the ''Richmond Item'', and traces its history back to 1831, making it the oldest continuous business in Richmond. The company was sold in 1976 to the Gannett Company, and is currently part of the ''USA Today'' network of titles. Its news director is Greg Fallon. Notable writers from the paper's staff include Mike Lopresti, who is now a sports columnist for the Gannett News Service and is published in many of their papers. Naming The paper's website explains the origin of "Palladium" as referring to "Pallas Athena, whose warlike nature was provoked by injustice and interference with constructive, peaceful living. Pallas Athena was the Goddess of Wisdom and considered a symbol of protection," and that Palladium denotes "the protection of the rights of people, is believed to have come from Greek history where the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
W3XK
W3XK is widely regarded as the oldest television station in the United States. It was operated by Charles Jenkins of Charles Jenkins Laboratories from July 2, 1928 to 1934. It is believed to be the first station to broadcast to the general public. (Note, however, that in January 1928, GE began broadcasting as 2XB – later W2XB – on 790 kHz using a 24 line mechanical standard. ) The station's frequency started out at 1605 kc., but moved to 6420 kc. (6.42 Mc.), and eventually moved to the 2.-2.1 Mc. band. It broadcast from Wheaton, Maryland (just outside Washington, D.C.), at a resolution of just 48 lines. The way to view television at the time was by mechanical television sets, and this station operated in that way. See also * Bernard H. Paul * W2XB W, or w, is the twenty-third and fourth-to-last letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. It represents a consona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Television
Television, sometimes shortened to TV, is a telecommunication medium for transmitting moving images and sound. The term can refer to a television set, or the medium of television transmission. Television is a mass medium for advertising, entertainment, news, and sports. Television became available in crude experimental forms in the late 1920s, but only after several years of further development was the new technology marketed to consumers. After World War II, an improved form of black-and-white television broadcasting became popular in the United Kingdom and the United States, and television sets became commonplace in homes, businesses, and institutions. During the 1950s, television was the primary medium for influencing public opinion.Diggs-Brown, Barbara (2011''Strategic Public Relations: Audience Focused Practice''p. 48 In the mid-1960s, color broadcasting was introduced in the U.S. and most other developed countries. The availability of various types of archival st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenography
Shorthand is an abbreviated symbolic writing method that increases speed and brevity of writing as compared to longhand, a more common method of writing a language. The process of writing in shorthand is called stenography, from the Greek ''stenos'' (narrow) and ''graphein'' (to write). It has also been called brachygraphy, from Greek ''brachys'' (short), and tachygraphy, from Greek ''tachys'' (swift, speedy), depending on whether compression or speed of writing is the goal. Many forms of shorthand exist. A typical shorthand system provides symbols or abbreviations for words and common phrases, which can allow someone well-trained in the system to write as quickly as people speak. Abbreviation methods are alphabet-based and use different abbreviating approaches. Many journalists use shorthand writing to quickly take notes at press conferences or other similar scenarios. In the computerized world, several autocomplete programs, standalone or integrated in text editors, based on w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wheaton, Maryland
Wheaton is a census-designated place in Montgomery County, Maryland, United States, situated north of Washington, D.C. and northwest of downtown Silver Spring. Wheaton takes its name from Frank Wheaton (1833–1903), a career officer in the United States Army and volunteer from Rhode Island in the Union Army who rose to the rank of major-general while serving before, during and after the Civil War. Wheaton was found to have a population of 52,150 in the 2020 census. The United States Postal Service has assigned ZIP code 20902 to Wheaton, but the Wheaton Post Office is a part of the larger Silver Spring area. Downtown Wheaton is located around the triangle formed by Veirs Mill Road, University Boulevard, and Georgia Avenue. History The Three Great Roads Wheaton developed from Leesborough (named in 1826), a small business district which grew near the junction of three major roads: The first of these is Brookeville Pike (also known as the Washington-Brookeville Pike and late ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bandwidth (signal Processing)
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies. It is typically measured in hertz, and depending on context, may specifically refer to ''passband bandwidth'' or ''baseband bandwidth''. Passband bandwidth is the difference between the upper and lower cutoff frequencies of, for example, a band-pass filter, a communication channel, or a signal spectrum. Baseband bandwidth applies to a low-pass filter or baseband signal; the bandwidth is equal to its upper cutoff frequency. Bandwidth in hertz is a central concept in many fields, including electronics, information theory, digital communications, radio communications, signal processing, and spectroscopy and is one of the determinants of the capacity of a given communication channel. A key characteristic of bandwidth is that any band of a given width can carry the same amount of information, regardless of where that band is located in the frequency spectrum. For example, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lee De Forest
Lee de Forest (August 26, 1873 – June 30, 1961) was an American inventor and a fundamentally important early pioneer in electronics. He invented the first electronic device for controlling current flow; the three-element "Audion" triode vacuum tube in 1906. This started the Electronic Age, and enabled the development of the electronic amplifier and oscillator. These made radio broadcasting and long distance telephone lines possible, and led to the development of talking motion pictures, among countless other applications. He had over 300 patents worldwide, but also a tumultuous career— he boasted that he made, then lost, four fortunes. He was also involved in several major patent lawsuits, spent a substantial part of his income on legal bills, and was even tried (and acquitted) for mail fraud. Despite this, he was recognised for his pioneering work with the 1922 IEEE Medal of Honor, the 1923 Franklin Institute Elliott Cresson Medal and the 1946 American Institute of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
W2XCR
W2XCR was founded in 1931 in Long Island City, New York by the radio station WGBS (now WINS). During the early part of 1931, but before the call letters were changed to WINS, the station began experimenting with mechanical television broadcasting, operating a Jenkins mechanical scanner through the experimental transmitter, W2XCR. The station broadcast using both 48-line, 15 frame/s, and 60-line, 20 frame/s standards during 1931. Mechanical TV broadcast in the AM radio band (550–1,500 kHz) in 1928 and 1929. With 24- and 30-line systems, only about 10 kHz of bandwidth was needed, so standard radio channels could be used. Some stations also broadcast in the shortwave band. Beginning in 1930, the 2-3 Mc. band was used for television, with 100 kHz channel width. 60-line systems required about 40 kHz of bandwidth. TV broadcasts could be identified by their distinctive sound. See also * List of experimental television stations * Oldest television station * Charles J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jenkins Mechanical Scanner
Jenkins may refer to: People * Jenkins (name), history of the surname * List of people with surname Jenkins * The Jenkins, country music group Places United States *Jenkins, Illinois *Jenkins, Kentucky *Jenkins, Minnesota *Jenkins, Missouri *Jenkins County, Georgia * Jenkins Township, Crow Wing County, Minnesota *Jenkins Township, Luzerne County, Pennsylvania Other *Jenkins (crater), on the Moon and VA Politics and history *Jenkins Commission (UK), an English voting reform commission *Jenkins Commission (EU), a European monetary commission *War of Jenkins' Ear, a colonial war between Britain and Spain Software *Jenkins (software), a continuous integration tool *Jenkins hash function Other *Jenkins activity survey, a psychological assessment tool *Jenkins (drinking game) * "Jenkins" (''How I Met Your Mother''), a television episode *Leeroy Jenkins, an Internet meme related to ''World of Warcraft'' See also *Hundred of Jenkins, a region in South Australia *Jenkin *Jenkyns *Ju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
