Musical box

The discs can also be played on many antique music boxes bearing the Polyphony and Regina brand names. The Gilson opals often seen in vintage jewellery are actually an imitation consisting of laminated glass with bits of foil interspersed. They stand out by their continuing production of discs, with a selection of about a thousand tunes. Most so-called synthetics, however, are more correctly termed imitations, as they contain substances not found in natural opal (e.g., plastic stabilizers). They offer clockwork, spring wound models as well as electric ones. Two notable producers of synthetic opal are the companies Kyocera and Inamori of Japan. The Porter Music Box company of Vermont produces steel disc music boxes in several formats. Synthetics are also generally lower in density and are often highly porous; some may even stick to the tongue.

The company is an industrial concern which also makes magnetic and hologram card readers, appliance components, industrial robots and miniature motors of all kinds. Synthetics are further distinguished from naturals by the former's lack of fluorescence under UV light. Recently, it has started selling licences for its music box tunes to cellular phone companies, for use as ring tones. The resulting material is distinguishable from natural opal by its regularity; under magnification, the patches of colour are seen to be arranged in a "lizard skin" or "chicken wire" pattern. Sankyo Seiki bills itelf as the biggest manufacturer of music boxes in the world, and advertises that it controls 50% of the market. The discovery of the ordered sphere structure of precious opal led to its synthesis by Pierre Gilson in 1974 (Klein and Hurlbut, 1985, p.528). It also supplies movements to many other manufacturers, or to clockmakers and clockmaker suppliers which sometimes sell them retail to hobbyists for as low as 3 Euros each. As well as occurring naturally, opals of all varieties have been synthesized experimentally and commercially.

In Japan Sankyo Seiki still makes a wide variety of music boxes from tiny musical keychains to much larger models. The state gem stone for Nevada is precious black opal, which is named for the true black opal found in Virgin Valley, Humboldt County, Nevada. They also sell several models of clear acrylic paperweights with a musical box movement inside, for a minimum of about 45 Euros. Opal is the official birthstone of the month of October. The higher range boxes with removable cylinders and small assorted tables made of fine woods can cost up to 34,000 Euros and about an equivalent number of US dollars. The opal is the official gemstone of South Australia. They have in a sense branched out widely from their original cylinder offerings since they now also offer traditional looking music boxes with removable metal disks for around a 1,000 Euros, with each disk costing in the neighborhood of 14 Euros. As a result, most of the production goes into the making of doublets and triplets.

Located near Lake Neuchâtel, Reuge is one of the last of the Swiss survivors making music boxes of all sizes and shapes, with or without automatons in imitation of past models of the previous centries or in a modern style with clear acrylic sides to see the mechanical operation. A high percentage of the opal found there occurs in thin layers. Some went back to making watches, others were eventually responsible for the famous Bolex movie cameras and the Hermes typewriters. A source of white base opal in the United States is Spencer, Idaho. Between the two world wars most of the swiss companies converted to the manufacture of other products requiring precise mechanical parts. Boulder opal has a main source in Quilpie, Queensland. They are eagerly sought by collectors who have the space for their large or very large cabinets. Another Australian town, Lightning Ridge in New South Wales, is the main source of black opal, opal containing a predominantly dark background (dark-gray to blue-black displaying the play of color).

Because most of the coin-operated music boxes were built for rough treatment (such as typical slapping and kicking by a disgruntled customer) many of these large models have survived into the 21st century, despite their relatively low production quantities. Common, water, jelly, and fire opal are found mostly in Mexico and Mesoamerica. However, since they produced music instead of playing back any sound, including human voices singing, they soon disappeared from their intended venues, displaced by the jukebox. In particular, the town of Coober Pedy in South Australia is a major source. These were, in an sense, the precursors to jukeboxes. About 95% of the world's opal comes from Australia. Some of the models had a mechanism for automatically changing the metal disks. The resulting fossils, though not of any extra scientific interest, appeal to collectors.

In Switzerland coin-operated music boxes, usually capable of playing several tunes, were installed in places like train stations and amusement parks. Opal is one of the mineraloids that can form or replace fossils. Surviving musical boxes from the 19th century and the early 20th century are prized by collectors and there is a more or less constant manufacturing of reproductions. Opal is a mineraloid gel which is deposited at relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, and basalt. These movements are also sold in retail outlets or by catalog for hobbyists who wish to make simple musical miniatures. Besides the gemstone varieties that show a play of color, there are other kinds of common opal such as the milk opal, milky bluish to greenish; resin opal, honey-yellow with a resinous lustre; wood opal, caused by the replacement of the organic material in wood with opal; menilite brown or grey; hyalite, a colorless glass-clear opal sometimes called Muller's Glass; geyserite, (siliceous sinter) deposited around hot springs or geysers; and diatomite or diatomaceous earth, the accumulations of diatom shells or tests. Cheap windup music box movements (including the cylinder and comb and the spring) continued to be produced in countries like Japan, and later on in other countries with low production costs, to give a bit of music to mass produced jewelry boxes and novelty items. The triplet cut backs the colored material with a dark backing, and then has a cap of clear quartz (rock crystal) on top, which takes a high polish, and acts as a protective layer for the comparatively delicate opal.

A few of the original ones found new markets. Given the texture of opals, they can be quite difficult to polish to a reasonable lustre. Series production rapidly disappeared and all the important companies closed their doors. The darker backing emphasizes the play of color, and results in a more attractive display than a lighter potch. At the end of the 19th century and the beginning of the 20th most musical boxes were gradually replaced by Player pianos, which were more versatile and loud, and also melodious, when kept tuned, and by the smaller gramophones which had the advantage of playing back voices. An opal doublet is a thin layer of colorful material, backed by a black mineral, such as ironstone, basalt or obsidian. Some devices could do both at the same time, and were often combinations of player pianos and musical boxes, such as the Orchestrion. The veins of opal displaying the play of color are often quite thin, and this has given rise to unusual methods of preparing the stone as a gem.

Instead, the cylinder (or disk) worked by actuating bellows and levers which fed and opened pneumatic valves which activated a modified wind instrument or plucked the chords on a modified string instrument. Potch does not show a play of color. The term "musical box" is also applied to clockwork devices where a removable metal disk or cylinder was used only in a "programming" function without producing the sounds directly by means of pins and a comb. Contrarily, opalescence is correctly applied to the milky, turbid appearance of common or potch opal. The cylinder based machines rapidly became a minority. The term opalescence is commonly and erroneously used to describe this unique and beautiful phenomenon, which is correctly termed play of color. In the last decades of the 19th century however, mass produced models such as the Polyphon and others all made use of interchangeable metal disks instead of cylinders. In addition microfractures may be filled with secondary silica and form thin lamellae inside the opal during solidification.

The switch over to cylinders seems to have been complete after the Napoleonic wars. 444). The very first boxes at the end of the 18th century made use of metal disks. These ordered silica spheres produce the internal colors by causing the interference and diffraction of light passing through the microstructure of opal (Klein and Hurlbut, 1985, p. In some exceptional models there were four springs, to provide continuous play for up to three hours. At the micro scale precious opal is composed of hexagonal or cubic closely packed silica spheres some 150 to 300 nm in diameter. In some of the costlier models, the cylinders could be removed to change melodies, thanks to an invention by Paillard in 1862, which was perfected by Metert, of Geneva in 1879. Precious opal shows a variable interplay of internal colours and does have an internal structure.

The cylinders were normally made of metal and powered by a spring. . By the end of the 19th century some of the European makers had opened factories in the United States. The word opal comes from the Sanskrit upala, the Greek opallios, and the Latin opalus, meaning "precious stone.". There were also a few manufacturers in Bohemia and Germany. Common opal is truely amorphous, but precious opal does have a structural element. The first musical box factory was opened there in 1815 by Jérémie Recordon and Samuel Junod. Opal ranges from colorless through white, milky blue, gray, red, yellow, green, brown and black.

For most of the 19th century the bulk of musical box production was concentrated in Switzerland, building upon a strong watchmaking tradition. The mineraloid opal is amorphous SiO₂·nH₂O; hydrated silicon dioxide, the water content sometimes being as high as 20%. They were usually powered by clockwork and originally produced by artisan watchmakers. Most of them were table top specimens though. The musical boxes could have any size from that of a hat box to a large piece of furniture.

The original snuff boxes were tiny containers which could fit into a gentleman's waist coat pocket. . Alec Templeton, an avid collector of music boxes, and a professional concert musician, once noted that the tone of a musical box is unlike that of any musical instrument (although it is best described as somewhere between the timbres of an mbira and a celesta). Some of the more complex boxes also have a tiny drum and small bells, in addition to the metal comb.

They were developed from musical snuff-boxes of the 18th century, and called carillons à musique. A musical box (or music box) is a 19th century automatic musical instrument that produces sounds by the use of a set of pins placed on a revolving cylinder so as to strike the tuned teeth of a steel comb. This function is played by the cylinder in a cylinder music box. The disc is the programming object, a metallic version of a punched card which, like it has holes to express a program, star wheels which turn with the disc produce music by striking the teeth of the comb at the correct time.

This function is payed by the disc in a disc music box. The cylinder is the programming object, a metallic version of a punched card which, instead of having holes to express a program, is studded with tiny pins at the correct spacing to produce music by striking the teeth of the comb at the correct time. The comb is a flat piece of metal with dozens or even hundreds of tuned teeth of different lengths. The spring motor or motors (2 or more can be used to make playing times longer) give anywhere from a few minutes to an hour or more of playing time.

The ratchet lever or the windup key is used to put the spring motor under tension, that is to wind it up. The bedpan is the relatively heavy metal foundation on which all the other pieces are fastened, usually by screws.