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Axial Flow Valve
The axial flow valve, or Thayer valve, is a brass instrument valve design patented in 1978 by American inventor Orla Ed Thayer. Designed with assistance from instrument maker Zigmant Kanstul, it was originally intended to replace the traditional rotary valve on the French horn, but instead revolutionized the design of trombone valve attachments. Combined with open-wrap tubing, it eliminates the impedance caused by tight tubing bends, improving the airflow through the instrument and the open "feel" perceived by the player. Problem When engaged, a rotary valve deflects the air flow through extra valve tubing, using tight, small radius bends of at least 90° angles, leading to a stuffy response and audible tone colour changes, compared to the "open" instrument. These drawbacks are especially noticeable on the trombone, since its characteristic timbre results directly from its cylindrical bore and almost straight construction with only two bends (not counting the valve tubing). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Axial Flow Valve On Tenor Trombone Mod1
{{disambiguation ...
Axial may refer to: * one of the anatomical directions describing relationships in an animal body * In geometry: :* a geometric term of location :* an axis of rotation * In chemistry, referring to an axial bond * a type of modal frame, in music * axial-flow, a type of fan * the Axial Age in China, India, etc. * Axial Seamount and submarine volcano off Oregon, USA * Axial, Colorado, a ghost town See also *Axiality (other) *Axis (other) An axis (: axes) may refer to: Mathematics *A specific line (often a directed line) that plays an important role in some contexts. In particular: ** Coordinate axis of a coordinate system *** ''x''-axis, ''y''-axis, ''z''-axis, common names ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brass Instrument Axial Flow Valve Diagram
Brass is an alloy of copper and zinc, in proportions which can be varied to achieve different colours and mechanical, electrical, acoustic and chemical properties, but copper typically has the larger proportion, generally copper and zinc. In use since prehistoric times, it is a substitutional alloy: atoms of the two constituents may replace each other within the same crystal structure. Brass is similar to bronze, a copper alloy that contains tin instead of zinc. Both bronze and brass may include small proportions of a range of other Chemical element, elements including arsenic, lead, phosphorus, aluminium, manganese and silicon. Historically, the distinction between the two alloys has been less consistent and clear, and increasingly museums use the more general term "list of copper alloys, copper alloy". Brass has long been a popular material for its bright gold-like appearance and is still used for drawer pulls and door handle, doorknobs. It has also been widely used to ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christian Lindberg
Christian Lindberg (born 15 February 1958) is a Swedish trombonist, conductor and composer. Biography Early life and career Lindberg was born in Danderyd. As a youth, he learned to play the trumpet, and subsequently began to learn the trombone at age 16. He originally borrowed a trombone to join his friends' Dixieland jazz group, inspired by records of Jack Teagarden. He attended the Royal Swedish Academy of Music, where his teachers included Sven-Erik Eriksson. By age 18, he had obtained a professional position in the Royal Swedish Opera Orchestra. At age 20, he left his orchestral career behind to study to become a full-time soloist. He studied with John Iveson at the Royal College of Music (1979–1980) and with Ralph Sauer and Roger Bobo in Los Angeles (1983). Professional career In 1981, Lindberg won the Nordic Soloists' Biennale competition. His concert debut was in 1984 with the Trombone Concerto by Henri Tomasi. That same year, he signed a 3-CD recording con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hagmann Valve
The Hagmann Free-Flow Valve is a trademarked brass instrument valve design developed by Swiss musician and instrument technician René Hagmann, first introduced for trombone F attachments in 1990. His intention was to address some of the geometrical limitations of the regular rotary valve, as well as the reliability and maintenance issues of the popular Thayer axial flow valve that arise from its relatively complex design. Construction A standard rotary valve has a rotor with two valve ports, which deflect the air flow through a 90° turn when engaged. While this does not substantially affect the sound of instruments like the French horn or tuba, which already have many sharp bends in the tubing, the characteristic sound of the trombone is partly due to its long straight air flow. The valve ports in rotary valves require a small radius 90° bend or "knuckle" shape. This causes increased acoustic impedance, and therefore frequency dampening effects of some harmonics, dependi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arms Race
An arms race occurs when two or more groups compete in military superiority. It consists of a competition between two or more State (polity), states to have superior armed forces, concerning production of weapons, the growth of a military, and the aim of superior military technology. Unlike a racing, sporting race, which constitutes a specific event with winning interpretable as the outcome of a singular project, arms races constitute spiralling systems of on-going and potentially open-ended behavior. The existing scholarly literature is divided as to whether arms races correlate with war. International-relations scholars explain arms races in terms of the security dilemma, engineering spiral models, states with Revisionist state, revisionist aims, and Deterrence theory, deterrence models. Examples Pre-First World War naval arms race From 1897 to 1914, a Anglo-German naval arms race, naval arms race between the United Kingdom and German Empire, Germany took place. Br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vincent Bach Corporation
The Vincent Bach Corporation is a US manufacturer of brass instruments that began early in the early Twentieth Century and still exists as a subsidiary of Conn-Selmer, a division of Steinway Musical Instruments. The company was founded in 1918 by Austrian-born trumpeter Vinzenz Schrottenbach ( Vincent Bach). Vincent Bach Vinzenz Schrottenbach (sometimes misspelled "Vincenz Schrotenbach") was born in Baden near Vienna in 1890. As a child he received training on violin, trumpet and bugle. By age 12 he had concentrated on the trumpet.Priestley, Brian, Dave Gelly, Tony Bacon, The sax & brass book, Miller Freeman Books, San Francisco, CA, 1998, p. 1970 After he graduated from Maschinenbauschule (Mechanical Engineering School, Ansbach) with an engineering degree,History of Bach Stradivarius he entered into |
Teflon
Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene, and has numerous applications because it is chemically inert. The commonly known brand name of PTFE-based composition is Teflon by Chemours, a spin-off from DuPont, which originally invented the compound in 1938. Polytetrafluoroethylene is a fluorocarbon solid, as it is a high- molecular-weight polymer consisting wholly of carbon and fluorine. PTFE is hydrophobic: neither water nor water-containing substances wet PTFE, as fluorocarbons exhibit only small London dispersion forces due to the low electric polarizability of fluorine. PTFE has one of the lowest coefficients of friction of any solid. Polytetrafluoroethylene is used as a non-stick coating for pans and other cookware. It is non-reactive, partly because of the strength of carbon–fluorine bonds, so it is often used in containers and pipework for reactive and corrosive chemicals. When used as a lubricant, PTFE reduces fric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thayer Valves (independent) On Bass Trombone Mod1
Thayer may refer to: Places ;United States * Thayer, Illinois * Thayer, Indiana * Thayer, Iowa * Thayer, Kansas * Thayer, Michigan * Thayer, Missouri * Thayer, Nebraska * Thayer, West Virginia * Thayer County, Nebraska * Thayer Street, Providence, Rhode Island * Thayer Township, Thurston County, Nebraska * Mount Thayer, a mountain in the Santa Cruz Mountains of California Education ;United States * Thayer Academy in Braintree, Massachusetts * Thayer Hall, a Harvard University dormitory * Thayer Learning Center, Kidder, Missouri * Thayer School of Engineering, Dartmouth College Other * Thayer (name), including a list of people with the name * Thayer's gull Thayer's gull (''Larus glaucoides thayeri'') is a subspecies of the Iceland gull. It is a large gull native to North America. Distribution This gull breeds in the Arctic islands of Canada and winters primarily on the Pacific coast, from southern ... * Thayer Valve, a valve for trombones * C.A. Thayer, a schooner preserved ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precession
Precession is a change in the orientation of the rotational axis of a rotating body. In an appropriate reference frame it can be defined as a change in the first Euler angle, whereas the third Euler angle defines the rotation itself. In other words, if the axis of rotation of a body is itself rotating about a second axis, that body is said to be precessing about the second axis. A motion in which the second Euler angle changes is called '' nutation''. In physics, there are two types of precession: torque-free and torque-induced. In astronomy, ''precession'' refers to any of several slow changes in an astronomical body's rotational or orbital parameters. An important example is the steady change in the orientation of the axis of rotation of the Earth, known as the precession of the equinoxes. Torque-free or torque neglected Torque-free precession implies that no external moment (torque) is applied to the body. In torque-free precession, the angular momentum is a constant, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galvanic Corrosion
Galvanic corrosion (also called bimetallic corrosion or dissimilar metal corrosion) is an electrochemical process in which one metal corrodes preferentially when it is in electrical contact with another, different metal, when both in the presence of an electrolyte. A similar galvanic reaction is exploited in single-use battery cells to generate a useful electrical voltage to power portable devices. This phenomenon is named after Italian physician Luigi Galvani (1737–1798). A similar type of corrosion caused by the presence of an external electric current is called '' electrolytic corrosion''. Overview Dissimilar metals and alloys have different electrode potentials, and when two or more come into contact in an electrolyte, one metal (that is more reactive) acts as anode and the other (that is less reactive) as cathode. The electropotential difference between the reactions at the two electrodes is the driving force for an accelerated attack on the anode metal, which disso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bass Trombone
The bass trombone (, ) is the bass instrument in the trombone family of brass instruments. Modern instruments are pitched in the same B♭ as the tenor trombone but with a larger bore, bell and mouthpiece to facilitate low register playing, and usually two brass instrument valve, valves to fill in the missing range immediately above the pedal tones. History The earliest bass trombones were pitched a minor third, perfect fourth, fourth, or perfect fifth, fifth below the tenor, which was then pitched in A.Due to the higher concert pitch#History of pitch standards in Western music, church pitch used throughout parts of Renaissance Europe, tenor trombones were usually described as pitched in A, even though they are a similar size to modern B♭ tenor trombones. The first position A = 466 Hz in high pitch produces the B♭ in the modern A440 (pitch standard), 440 Hz pitch standard. They had a smaller bore and less flared bell than modern instruments, and a longer slide with an att ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conical Bore
In music, the bore of a wind instrument (including woodwind and brass) is its interior chamber. This defines a flow path through which air travels, which is set into vibration to produce sounds. The shape of the bore has a strong influence on the instrument's timbre. Bore shapes The cone and the cylinder are the two idealized shapes used to describe the bores of wind instruments. Other shapes are not generally used, as they tend to produce dissonant, anharmonic overtones and an unmusical sound. Instruments may consist of a primarily conical or cylindrical tube, but begin in a mouthpiece, and end in a rapidly-expanding "flare" or "bell". This flare reduces the acoustic impedance mismatch between the instrument and the air, allowing the instrument to transmit sound to the air more effectively. These shapes affect the prominence of harmonics associated with the timbre of the instrument. A bore that flares from the mouthpiece reduces resistance to the breath, while a bore that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
