Clock

The digital clock was invented in 1956.
. Quartz timepieces were invented in the 1920s. Styles include:. The Noon gun in Cape Town still fires an accurate signal to allow ships to check their chronometers. The various types of corsets include:. John Harrison created the first, highly accurate marine chronometers in the mid-18th century. While they often feature lacing and boning, and generally mimic a historical style of corset, they have very little effect on the shape of the wearer's body.

This need was a major motivation for the development of accurate mechanical clocks. The majority of garments sold as corsets during these recent revivals cannot really be counted as corsets at all. Latitude is fairly easy to determine through celestial navigation, but the measurement of longitude requires accurate measurement of time. The strongest of these revivals was seen in the Autumn 2001 fashion collections and coincided with the release of the film Moulin Rouge!, the costumes for which featured many corsets. Accurate navigation by ships beyond the sight of land depends on the ability to measure latitude and longitude. These revivals focus on the corset as an item of outerwear rather than underwear. Rather, they are designated as the current ideal clock because they are currently the best instantiation of the definition. Since the late 1980s, the corset has experienced periodic revivals, which have usually originated in haute couture and which have occasionally trickled through to mainstream fashion.

However, they are not so designated by fiat. This revival was brief, as the New Look gave way to a less dramatically-shaped silhouette. Since atoms are so numerous and since, within current measurement tolerances, they all beat in a manner such that if one is chosen as periodic then the others are all deemed to be periodic also, it follows that atomic clocks represent ideal clocks to within present measurement tolerances and in relation to all presently known physical processes. However, use of the waist cincher was restricted to haute couture, and most women continued to use girdles. While not all physical processes can be surveyed, the definition should be based on the set of physical processes which includes all individual physical processes which are proposed for consideration. This was used to give the hourglass figure dictated by Christian Dior's 'New Look'. This definition can be further improved by the consideration of successive levels of smaller and smaller error tolerances. There was a brief revival of the corset in the late 1940s and early 1950s, in the form of the waist cincher.

Sometimes that signal alone is (confusingly) called "the clock," but sometimes "the clock" includes the counter, its indicator, and everything else supporting it. (Putting on the corset after giving the enema will almost certainly cause the enema to be expelled.). The recurrent, periodic process (a metronome) is an oscillator and typically generates a clock signal. Another angle is the wearing of a corset while having an enema; the theory is that the corset prevents the belly distending, enhancing the effects of the enema. This leads to the following definitions:. In this case, the corset may still be underwear rather than outerwear. An ideal clock is more appropriately defined in relationship to the set of all physical processes. In the fetish and BDSM literature, there is often much emphasis on tightlacing.

Therefore, to define an ideal clock in terms of any physical theory would be circular. Originally an item of lingerie, the corset has become a popular item of outerwear in the fetish, BDSM and goth subcultures. An ideal clock is a scientific principle that measures the ratio of the duration of natural processes, and thus will give the time measure for use in physical theories. The corset fell from fashion in the 1920s in Europe and America, replaced by girdles and elastic brassieres, but survived as an article of costume. Some computers also maintain time and date for all manner of operations whether these be for alarms, event initiation or just to display the time of day. Women active in the Society for Creative Anachronism and historical reenactment groups commonly wear corsets as part of period costume, without complaint. (A few research projects are developing CPUs based on asynchronous circuits). A properly fitted corset should be comfortable.

Practically all computers depend on an accurate internal clock signal to allow synchronized processing. Some modern day corset-wearers will testify that corsets can be comfortable, once one is accustomed to wearing them. an alarm clock, a VCR, or a time bomb (see: counter). See Victorian dress reform. It may also be used to control a device according to time, e.g. Many reformers recommended "Emancipation bodices", which were essentially tightly-fitted vests, like full-torso corsets without boning. The main purpose of a clock is not always to display the time. However, these writings were most apt to protest against the misuse of corsets for tightlacing; they were less vehement against corsets per se.

A small clock is often shown in a corner of computer displays or mobile phones. Many people now believe that all corsets are uncomfortable and that wearing them restricted women's lives, citing Victorian literature devoted to sensible or hygienic dress. a train station or church. Indeed, during the second half of the nineteenth century, when corset wearing was common, there were sport corsets specifically designed to wear while bicycling, playing tennis, or horseback riding, as well as for maternity wear. Clocks are in homes and offices; smaller ones (watches) are carried; larger ones are in public places, e.g. Moderate lacing is not incompatible with vigorous activity.
. In modern times, an undershirt or corset liner may be worn.

After a reset digital clocks lacking a backup battery either start counting from 00:00, or stay 00:00 to indicate that their time needs to be set. It absorbed perspiration and kept the corset and the gown clean. Mains-driven digital clocks are often reset after a power failure, and, typically, begin flashing to alert us that the time they display is incorrect. In the past, a woman's corset was usually worn over a garment called a chemise or shift, a sleeveless low-necked gown made of washable material (usually cotton or linen). A digital clock typically displays a numerical hour range of 0-23, or 1-12 (with an indication of AM or PM) using an LCD or LED display, although digital versions of analog-style faces exist. Present day corset-wearers usually tighten the corset just enough to reduce their waists by 5 to 10 centimeters (2 to 4 inches); it is very difficult for a slender woman to achieve as much as 15 centimeters (6 inches), although larger women can do so more easily. Digital clocks use electronic methods of keeping time, typically the 50 or 60 hertz oscillation of AC power or a crystal oscillator as in a quartz movement. Corsets were and are usually designed for support, with freedom of body movement an important consideration in their design.

The ultimate analog clock is the sundial, which tracks the sun continuously, registering the time by the shadow of its gnomon. These are extreme cases. The analog clock with digital display emulates a digital clock but with an analog movement. Other women, such as Polaire and Spook, also have achieved such reductions. It usually has a circular scale of 12 hours, which also serves as a scale of 60 minutes, and often also as a scale of 60 seconds. After 1998, the category changed to "smallest waist on a living person" and Cathie Jung took the title with a 15" waist. A clock face is the part of an analog clock that tells time through the use of a fixed numbered dial or dials and moving hand or hands. Until 1998, the Guinness Book of World Records listed Ethel Granger as having the smallest waist on record at 13".

Analog clocks may be mechanical or have a quartz movement. Tightlacers usually aim for 40 to 43 centimeter (16 to 17 inch) waists. There are two major types of clocks. By wearing a tightly-laced corset for extended periods, known as tightlacing, men and women can learn to tolerate extreme waist constriction and reduce their natural waist size. Even mechanical clocks have since come to be largely powered by batteries, removing the need for winding. Current tightlacers, lacking servants, are usually laced by spouses and partners.. Time in these cases is measured in several ways, such as by the behaviour of quartz crystals, or the decay of radioactive elements. Self-lacing is also incompatible with tightlacing, which strives for the utmost possible reduction of the waist.

The development of electronics in the twentieth century led to clocks with no clockwork parts at all. Once the lacing was adjusted comfortably, it was possible to leave the lacing as adjusted and take the corset on and off using the front opening (This removal method does not work if the corset is not sufficiently loose, and can potentially damage the busk). Terry is known as the founder of the American clock-making industry. However, many corsets also had a buttoned or hooked front opening called a busk. On November 17, 1797, Eli Terry received his first patent for a clock. In the Victorian heyday of corsets, a well-to-do woman would be laced by her maid, a gentleman by his valet. It was also at this time that clock cases began to be made of wood and clock faces to employ enamel. It is difficult — although not impossible — for a back-laced corset-wearer to do his or her own lacing.

The English clockmaker William Clement, inventor of the anchor escapement, is credited with developing this form in 1670. Tightening or loosening the lacing produces corresponding changes in the firmness of the corset. Notably, the longcase clock (aka grandfather clock) was created to house the pendulum and works. Corsets are held together by lacing, usually at the back. The excitement over the pendulum clock attracted the attention of designers resulting in a proliferation of clock forms. (By contrast, a girdle is usually made of elasticized fabric, without boning.). Within just one generation, minute hands and then second hands were added. Other materials used for boning include ivory, wood, and cane.

In 1670, the English clockmaker William Clement created the anchor escapement, an improvement over Huygens' crown escapement. Plastic is now the most commonly used material; spring or spiral steel is preferred for high-quality corsets. He determined the mathematical formula that related pendulum length to time (99.38 cm or 39.13 inches for the one second movement) and had the first pendulum driven clock made. In the Victorian period, steel and whalebone were favored. Christiaan Huygens, however, is usually credited as the inventor. Corsets are typically constructed of a flexible material (like cloth or leather) stiffened with boning (also called ribs or stays) inserted into channels in the cloth or leather. Galileo had the idea to use a swinging bob to propel the motion of a time telling device earlier in the 17th century. Sometimes the corset has been supported by a corset cover.

The next major development in accuracy occurred in 1657 with the invention of the pendulum clock. Normally a corset supports the visible dress, and spreads the pressure from large dresses, such as the crinoline and bustle. The dial between the hour markers is divided into four equal parts making the clocks readable to the nearest 15 minutes. A corset may also include garters to hold up stockings (alternatively a separate garter belt may be worn for that). These clocks have only one hand. A shorter kind of corset, which covers the waist area (from low on the ribs to just above the hips), is called a 'waist cincher'. The earliest table clocks that survive in any quantity are mid-16th century ones from the metalworking towns of Nuremberg and Augsburg. Some corsets extend over the hips and, in very rare instances, reach the knees.

Canonical hours differ in length, and varied as the times of sunrise and sunset shifted. An underbust corset begins just under the breasts and extends down to the hips. These were used to announce the canonical hours or intervals between set times of prayer. An overbust corset encloses the torso, extending from just under the arms to the hips. The earliest reasonably accurate clocks are the 13th century tower clocks probably developed for (and perhaps by) monks in Northern Italy. However, there was a period from around 1820 to 1835 when an hourglass figure (a small, nipped-in look to the waist) was also desirable for men; this was sometimes achieved by wearing a corset. The Muslims also constructed a variety of highly accurate astronomical clocks for use in their observatories. For men, corsets are more customarily used to slim the figure.

In addition, during the 9th century, Ibn Firnas of Islamic Spain, according to Will Durant, invented a watch-like device which kept accurate time. However, in some periods, corsets have been worn to achieve a tubular straight-up-and-down shape, which involves minimising the bust and hips. The latter type was directly copied by Europeans during the 15th century. For women this most frequently emphasises a curvy figure, by reducing the waist, and thereby exaggerating the bust and hips. One such clock included a mercury escapement. The most common use of corsets is to slim the body and make it conform to a fashionable silhouette. Designs and illustrations of epi-cyclic and segmental gears were provided. The word corsetry is sometimes also used as a collective plural form of corset.

These clocks were weight-driven. Someone who makes corsets is a corsetier (for a man) or corsetière (for a woman), or sometimes simply a corsetmaker. A variety of mechanical clocks were produced by Spanish Muslim engineers, both large and small, and this knowledge was transmitted to Europe through Latin translations of Islamic books on mechanics. The skill of making corsets is known as corsetry, as is the general wearing of them. This word has led scholars to believe that these tower clocks did not employ hands or dials, but “told” the time with audible signals such as bells. . (from Greek hora, hour, and legein, to tell). Both men and women have worn – and still wear – corsets.

There is a record that in 1176 Sens Cathedral installed a ‘horologe’—the word still used in French for large clocks. A corset is a garment worn to mold and shape the torso into a desired shape for aesthetic or orthopaedic purposes (either for the duration of wearing it, or with a more lasting effect). By the 9th century AD a mechanical timekeeper had been developed that lacked only an escapement mechanism. Website containing information and photographs about corsets & corseting through the ages, including celebrity photographs. Historians disagree over the Antikythera mechanism but this is largely thought to be an early mechanical clock. Ann Beaumont has published the series "Corseting the Human Body". The historian Vitruvius reported that the ancient Egyptians also used a clepsydras, a time mechanism run by flowing water. At the same site, Dr.

In an hourglass fine sand pours through a tiny hole at a predictable rate. Two doctors' opinions and advice on corset wearing can be found at the website of the Long Island Staylace Association. Candles and sticks of incense which burn down at approximately predictable speeds have also been used as clocks. Routledge (December 1, 1990), ISBN 0878305262. The sundial, which measures the time of day by the direction of shadows cast by the sun, was widely known in ancient times. Norah Waugh, Corsets and Crinolines. As the seasons and the phases of the moon can be used to measure the passage of longer periods of time, shorter processes could be used to measure off hours and minutes. ISBN 1931160066.

In principle, it requires no more than some physical process which will proceed at a known rate, and a way to gauge how long that process has been continuing. Larry Utley, Autumn Carey-Adamme, Fetish Fashion: Undressing the Corset Green Candy Press, 2002. The clock is one of the oldest human inventions. Yale University Press, 2001, ISBN 0300099533. . Valerie Steele, The Corset: A Cultural History. The clock in its most common modern form (in use since at least the 14th century) displays the hours, minutes, and sometimes seconds that pass over a twelve or twenty-four-hour period. Wasp waist.

A portable clock is called a watch. Waist cincher. (Usually, for measuring time of intervals less than a day--as opposed to a calendar.) Those used for technical purposes, of very high accuracy, are sometimes called chronometers. Training corset. A clock (from the Latin cloca, "bell") is an instrument for measuring time. Redresseur corset. world clock. Hourglass corset.

water clock. Bondage corset or discipline corset. watch. A badly-fitting corset can chafe, impede digestion, damage ribs and pinch nerves. time clock. Even finding a competent corsetiere can be difficult. tide clock. In modern times, when labour costs much more than materials, custom clothing can be extremely expensive.

sundial. The more closely clothing or lingerie clings to the body, the more carefully it must be fitted to look and feel right. striking clock. The best corsets are custom made and personally-fitted. stopwatch. They have been most often worn in cool climates. skeleton clock. Due to their tightness and close proximity to the body, corsets can make the wearer feel very warm.

sidereal clock. Corsets can instantly improve the figure without dieting, slimming drugs, or cosmetic surgery. quartz clock. (Straps can chafe or cut the skin.). projection clock. Some large-breasted women find corsets more comfortable than brassieres, because the weight of the breasts is carried by the whole corset rather than the brassiere's shoulder straps. torsion pendulum clock. Corsets can reduce pain and improve function for people with back problems or other muscular/skeletal disorders.

swinging pendulum clock. pedestal clock. mantel clock. longcase clock.

hourglass. grandfather clock. game clock. flip clock.

cuckoo clock. countdown clock. Railroad chronometers. doll's head clock.

Data clock for timescapes created with time-technology. clock network. chiming clock. cartel clock.

bracket clock. binary clock. atomic clock. astronomical clock.

analog clock with digital display. alarm clock. An ideal clock is a clock (i.e., recurrent process) that makes the most other recurrent processes periodic. A good clock is one which, when used to measure other recurrent processes, finds many of them to be periodic.

A clock is a recurrent periodic process and a counter.