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Electrostatic Pickup
An electrostatic pickup converts mechanical motion to an electrical signal by means of varying electrical capacitance. This type of pickup, in which the moving plate is a vibrating metal reed, is used in some types of electronic pianos and organs as an inexpensive method of generating tones. Principle of operation The electrostatic pickup consists of a capacitor with one stationary plate and one moving plate. The moving plate is typically a steel or brass reed, anchored at one end and free to vibrate at the other end. Another fixed plate is suspended near the vibrating reed, but is electrically insulated. A high voltage is applied between the stationary and moving plates to produce an electric field. The motion of the moving plate induces a varying current through the capacitor formed by the reed and the fixed plate. The capacitance of the pickup is changed by the motion of the moving plate. As a result of the changing capacitance, a varying current flows into or out of the plates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motion (physics)
In physics, motion is the phenomenon in which an object changes its position with respect to time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed and frame of reference to an observer and measuring the change in position of the body relative to that frame with change in time. The branch of physics describing the motion of objects without reference to its cause is called kinematics, while the branch studying forces and their effect on motion is called dynamics. If an object is not changing relative to a given frame of reference, the object is said to be ''at rest'', ''motionless'', ''immobile'', '' stationary'', or to have a constant or time-invariant position with reference to its surroundings. Modern physics holds that, as there is no absolute frame of reference, Newton's concept of '' absolute motion'' cannot be determined. As such, everything in the universe can be considered to be in motion. Motion applies to various p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pianet
The Hohner Pianet is a type of electro-mechanical piano built by the Hohner company of Trossingen, West Germany and designed by Ernst Zacharias. The Pianet was a variant of his earlier reed-based Hohner electric piano, the Cembalet, which, like the Pianet, was intended for home use. Hohner offered both keyboards in their range until 1968. The Pianet production consisted of two distinctly different mechanism groups with characteristically different sound. The first group, lasting from introduction to 1977, had ground stainless steel reeds, a pick-up using variable capacitance, and leather-faced activation pads. The second group from 1977 until the end of production used rolled spring-steel reeds, electro-magnetic pick-ups, and moulded silicone rubber activation pads. Features The Hohner Pianet is an electro-mechanical instrument, and needs to be connected to an amplifier to produce an audible sound. It had 61 keys ranging from F1 - F6 (43.6 Hz – 1396.9 Hz). Later mode ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benjamin Miessner
Benjamin Franklin Miessner (July 27, 1890 – March 25, 1976) was an American radio engineer and inventor. He is most known for his electronic organ, electronic piano, and other musical instruments. He was the inventor of the Cat's whisker detector. Early life and career Miessner was born in Huntingburg, Indiana to Charles and Mary (Reutopohler) Miessner and was the brother of Otto Miessner. He attended school in Huntingburg and graduated from high school in 1908. He then enlisted in the U. S. Navy, and graduated from the U.S. Naval Electrical School in Brooklyn, NY in 1909. He was assigned to a naval radio station in Washington, D.C. to be a radio operator. It was while he was in Washington that he invented the "cat whisker" detector which allowed for receiving radio waves by crystal sets. He was also promoted to Chief Operator. He left the Navy to work with John Hays Hammond Jr. and Frtiz Lowenstein in 1911. The group worked on a wireless control system for torpedoes. Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Footnotes
A note is a string of text placed at the bottom of a page in a book or document or at the end of a chapter, volume, or the whole text. The note can provide an author's comments on the main text or citations of a reference work in support of the text. Footnotes are notes at the foot of the page while endnotes are collected under a separate heading at the end of a chapter, volume, or entire work. Unlike footnotes, endnotes have the advantage of not affecting the layout of the main text, but may cause inconvenience to readers who have to move back and forth between the main text and the endnotes. In some editions of the Bible, notes are placed in a narrow column in the middle of each page between two columns of biblical text. Numbering and symbols In English, a footnote or endnote is normally flagged by a superscripted number immediately following that portion of the text the note references, each such footnote being numbered sequentially. Occasionally, a number between brack ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wurlitzer Electric Piano
The Wurlitzer electronic piano is an electric piano manufactured and marketed by Wurlitzer from the mid-1950s to mid-1980s. Sound is generated by striking a metal reed with a hammer, which induces an electric current in a pickup. It is conceptually similar to the Rhodes piano, though the sound is different. The instrument was invented by Benjamin Miessner, who had worked on various types of electric pianos since the early 1930s. The first Wurlitzer was manufactured in 1954, and production continued until 1983. Originally, the piano was designed to be used in the classroom, and several dedicated teacher and student instruments were manufactured. However, it was adapted for more conventional live performances, including stage models with attachable legs and console models with built-in frames. The stage instrument was used by several popular artists, including Ray Charles, Joe Zawinul and Supertramp. Several electronic keyboards include an emulation of the Wurlitzer. As the Wurli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compton Organ
John Compton (1876–1957), born in Newton Burgoland, Leicestershire was a pipe organ builder. His business based in Nottingham and London flourished between 1902 and 1965. Life John Compton was educated at King Edward's School, Birmingham and then studied as an apprentice with Halmshaw & Sons in Birmingham. In 1898 he joined Brindley and Foster in Sheffield.Douglas Earl Bush, Richard Kassel, ''The organ: an encyclopedia''. Routledge, 2006, p.122. Then he joined Charles Lloyd in Nottingham. He set up the business Musson & Compton in 1902 in Nottingham with James Frederick Musson. The partnership dissolved in 1904. In 1919, the business moved to workshops at Turnham Green Terrace, Chiswick, London, which had been vacated by August Gern. He occupied a new factory at Chase Road, Park Royal, North Acton, London in 1930. Compton worked primarily on electric-action pipe organs and electronic organs. Compton's first electronic instrument was the Melotone (a solo voice added to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orgatron
An electric organ, also known as electronic organ, is an electronic keyboard instrument which was derived from the harmonium, pipe organ and theatre organ. Originally designed to imitate their sound, or orchestral sounds, it has since developed into several types of instruments: * Hammond-style organs used in pop, rock and jazz; * digital church organs, which imitate pipe organs and are used primarily in churches; * other types including combo organs, home organs, and software organs. History Predecessors ;Harmonium The immediate predecessor of the electronic organ was the harmonium, or reed organ, an instrument that was common in homes and small churches in the late 19th and early 20th centuries. In a fashion not totally unlike that of pipe organs, reed organs generate sound by forcing air over a set of reeds by means of a bellows, usually operated by constantly pumping a set of pedals. While reed organs have limited tonal quality, they are small, inexpensive, self-pow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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