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Encyclopedia > Record changer
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Record changer, made in Germany around 1960
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Record changer, made in Germany around 1960

A record changer is a device that plays multiple gramophone records in sequence. Image File history File links Record_changer_dscn1667a. ... Image File history File links Record_changer_dscn1667a. ... A gramophone record, (also vinyl record, phonograph record, LP record, or simply record) is an analogue sound recording medium consisting of a flat disc with an inscribed modulated spiral groove. ...


The limited playing time of 78 rpm gramophone records led to the development of record changers, which allowed stacks of several records to be loaded on a spindle and automatically played in sequence. The purely mechanical mechanisms were ingenious, and most of them were capable of automatically measuring the size of each record as it dropped and positioning the tone arm in the lead-in groove, so that stacks of 7", 10", or 12" records could be played automatically. This also led to the invention of the jukebox. A gramophone record, (also vinyl record, phonograph record, LP record, or simply record) is an analogue sound recording medium consisting of a flat disc with an inscribed modulated spiral groove. ... In music, an invention is a short composition with two or three part counterpoint. ... For the computer storage device see Optical Jukebox A replica Wurlitzer Jukebox A jukebox is a partially automated music-playing device, usually a coin-operated machine, that can play specially selected songs from self-contained media. ...


Record changers were provided in most mid-priced consumer phonographs of the 1950s through 1970s. They typically had an extended central spindle that the records were stacked on, and an extra arm designed to hold the stack steady and detect the width of the record.


They were met with disdain by Audiophiles because of the compromised fidelity resulting from changes in tone arm angle with the height of the stack, and concerns about changers' seemingly rough treatment of discs, particularly slight but cumulative damage to the spindle hole, as the records were effectively dropped from a height of a few inches onto the record platter. Changers became rarer in the 1980s.


The numbering of the sides of the discs in albums and boxed sets of LPs is explained by the fact that they were designed to be played on changers. After the discs were stacked and one side of each disc played, the stack would be turned over together as a unit and replaced on the changer. Thus, to be heard in the proper sequence, the discs of a four-disc set would contain, respectively, "sides" 1 & 8, 2 & 7, 3 & 6, and 4 & 5.


See also

A Compact Disc device capable of holding and playing multiple CDs. ...

External links

  • http://www.thevoiceofmusic.com/rec_chng.htm

  Results from FactBites:
 
Encyclopedia: Record changers (552 words)
As discussed generally heretofore, the record changer of the present invention is arranged to shift the speed of the turntable 56 automatically to 45 rpm when the 45 rpm adaptor 98 is positioned on the member 94 in place of the flat blade spindle 80.
However, when a record changing cycle is initiated, the cycling slide 280 moves forwardly during the initial portion of the record changing cycle and permits the pawl 478 to drop downwardly until the bottom surface of the catch portion 490 rides on the upper surface 492 of the tone arm index plate 156.
However, as the record is being moved off of the shelf 430 by the blade 418 (approximately mid cycle) the flange 384 on the pushoff slide 370 engages the edge portion 572 of the shut-off latch 510 and pivots the shutoff latch 510 about the detent pin 396 to the position shown in FIG.
Gramophone record - definition of Gramophone record in Encyclopedia (3801 words)
A gramophone record or phonograph record (often simply record) is an analogue sound recording medium: a flat disc rotating at a constant angular velocity, with inscribed spiral grooves in which a stylus or needle rides.
Recording on disc as opposed to phonograph cylinder had been experimented with by such inventors as Charles Cros, Thomas Edison and Chichester Bell, but the first to actually develop usable disc record technology was Emil Berliner, a German working in Washington, DC, in 1884.
All speeds of records were made in various sizes, mainly 7, 10 and 12 inches (18,20.5 and 30.5 cm aprox.) diameter; the 7-inch being most common for the 45rpm, the 10-inch for the 78 (and the first few years of 33⅓ production), and the 12-inch for the 33 from the mid 1950s on.
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