coat |
hammer |
top 10 words in brain distribution (in article): type century term world refer begin word modern design american |
top 10 words in brain distribution (in article): design animal head size allow common steel form time cut |
top 10 words in brain distribution (not in article): species cell fiber city form body time produce build state |
top 10 words in brain distribution (not in article): key lock switch machine needle type tube bicycle wire knit |
times more probable under coat 30 20 10 6 4 2.5 1.25 1 1.25 2.5 4 6 10 20 30 times more probable under hammer (words not in the model) | |
A coat'" is a long garment worn by both men and women, for warmth, protection or fashion. Coats typically have long sleeves and open down the front, closing by means of buttons, zippers, hook-and-loop fasteners, toggles, a belt, or a combination of these. Other possible ornaments include collars and shoulder straps. History of the word 'coat'. The Persians, based in what is now Iran, introduced two garments to the history of clothing: trousers and seamed fitted coats. "Coat" is one of the earliest clothing category words in English, attested as far back as the early Middle Ages. ("See also" Clothing terminology.) An early use of "coat" in English is coat of mail (chainmail), a tunic-like garment of metal rings, usually knee- or mid-calf length. The medieval and renaissance coat (generally spelled "cote" by costume historians) is a midlength, sleeved men's outer garment, fitted to the waist and buttoned up the front, with a full skirt: in its essentials, not unlike the modern coat. By the eighteenth century, overcoats had begun to supplant capes and cloaks as outer wear, and by the mid-twentieth century the terms "jacket" and "coat" became confused for recent styles; the difference in use is still maintained for older garments. Coats, Jackets and Overcoats. In the early nineteenth century, coats were divided into under-coats and overcoats. The term under-coat is now archaic but denoted the fact that the expression "coat" could be both the outermost layer for outdoor wear (overcoat) or the coat worn under that (under-coat). However, the term "coat" is increasingly beginning to denote just the overcoat rather than the under-coat. The older usage of the word "coat" can still be found in the expression "to wear a coat and tie", which does not mean that wearer has on an overcoat. Nor do the terms "tailcoat" or "morning coat" denote types of overcoat. Indeed, an overcoat may be worn over the top of a tailcoat. In tailoring circles, the tailor who makes all types of coats is called a "coat maker". Similarly, in both British and American English, the term "sports coat" is used to denote a type of jacket not worn as outerwear (overcoat). The term "jacket" is a traditional term usually used to refer to a specific type of short under-coat. Typical modern jackets extend only to the upper thigh in length, whereas older coats such as tailcoats are usually of knee length. The modern jacket worn with a suit is traditionally called a "lounge coat" (or a "lounge jacket") in British English and a "sack coat" in American English. The American English term is rarely used today. Traditionally, all men dressed in a "coat and tie", although this has become gradually less widespread since around the 1960s. Because the basic pattern for the stroller (black jacket worn with striped trousers in British English) and dinner jacket (tuxedo in American English) are the same as lounge coats, tailors traditionally call both of these special types of jackets a "coat". An overcoat is a long coat (at least mid-calf) designed to be worn as the outermost garment worn as outdoor wear; while this use is still maintained in some places, particularly in Britain, elsewhere the term "coat" is commonly used mainly denote only the overcoat, and not the under-coat. A "topcoat" is a slightly shorter overcoat, if any distinction is to be made. Overcoats worn over the top of knee length coats (under-coats) such as frock coats, dress coats, and morning coats are cut to be a little longer than the under-coat so as to completely cover it, as well as being large enough to accommodate the coat underneath. Coats of the 18th and 19th centuries. Some of these styles are still worn. Note that for this period, only coats of the under-coat variety are listed, and overcoats are excluded. Modern coats. The terms "coat" and "jacket" are used variously around the world, and we treat modern clothes as jackets. References. General: Picken, Mary Brooks: "The Fashion Dictionary", Funk and Wagnalls, 1957. (1973 edition ISBN 0-308-10052-2) | A hammer'" is a tool meant to deliver an impact to an object. The most common uses are for driving nails, fitting parts, and breaking up objects. Hammers are often designed for a specific purpose, and vary widely in their shape and structure. Usual features are a handle and a head, with most of the weight in the head. The basic design is hand-operated, but there are also many mechanically operated models for heavier uses. The hammer is a basic tool of many professions, and can also be used as a weapon. By analogy, the name "'hammer'" has also been used for devices that are designed to deliver blows, e.g. in the caplock mechanism of firearms. History. The use of simple tools dates to about 2,400,000 BCE when various shaped stones were used to strike wood, bone, or other stones to break them apart and shape them. Stones attached to sticks with strips of leather or animal sinew were being used as hammers by about 30,000 BCE during the middle of the Paleolithic Stone Age. Its archeological record means it is perhaps the oldest human tool known. Designs and variations. The essential part of a hammer is the head, a compact solid mass that is able to deliver the blow to the intended target without itself deforming. The opposite side of a ball as in the ball-peen hammer and the cow hammer. Some upholstery hammers have a magnetized appendage, to pick up tacks. In the hatchet the hammer head is secondary to the cutting edge of the tool. In recent years the handles have been made of durable plastic or rubber. The hammer varies at the top, some are larger than others giving a larger surface area to hit different sized nails and such, Mechanically-powered hammers often look quite different from the hand tools, but nevertheless most of them work on the same principle. They include: In professional framing carpentry, the hammer has almost been completely replaced by the nail gun. In professional upholstery, its chief competitor is the staple gun. Hammer as a force amplifier. A hammer is basically a force amplifier that works by converting mechanical work into kinetic energy and back. In the swing that precedes each blow, a certain amount of kinetic energy gets stored in the hammer's head, equal to the length "D" of the swing times the force "f" produced by the muscles of the arm and by gravity. When the hammer strikes, the head gets stopped by an opposite force coming from the target; which is equal and opposite to the force applied by the head to the target. If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance "d" before stopping. Since the stopping force "F" times that distance must be equal to the head's kinetic energy, it follows that "F" will be much greater than the original driving force "f" — roughly, by a factor "D" "d". In this way, great strength is not needed to produce a force strong enough to bend steel, or crack the hardest stone. Effect of the head's mass. The amount of energy delivered to the target by the hammer-blow is equivalent to one half the mass of the head times the square of the head's speed at the time of impact ([Formula 1]). While the energy delivered to the target increases linearly with mass, it increases geometrically with the speed (see the effect of the handle, below). High tech titanium heads are lighter and allow for longer handles, thus increasing velocity and delivering more energy with less arm fatigue than that of a steel head hammer of the same weight. As hammers must be used in many circumstances, where the position of the person using them cannot be taken for granted, trade-offs are made for the sake of practicality. In areas where one has plenty of room, a long handle with a heavy head (like a sledge hammer) can deliver the maximum amount of energy to the target. But clearly, it's unreasonable to use a sledge hammer to drive upholstery tacks. Thus, the overall design has been modified repeatedly to achieve the optimum utility in a wide variety of situations. Effect of the handle. The handle of the hammer helps in several ways. It keeps the user's hands away from the point of impact. It provides a broad area that is better-suited for gripping by the hand. Most importantly, it allows the user to maximize the speed of the head on each blow. The primary constraint on additional handle length is the lack of space in which to swing the hammer. This is why sledge hammers, largely used in open spaces, can have handles that are much longer than a standard carpenter's hammer. The second most important constraint is more subtle. Even without considering the effects of fatigue, the longer the handle, the harder it is to guide the head of the hammer to its target at full speed. Most designs are a compromise between practicality and energy efficiency. Too long a handle: the hammer is inefficient because it delivers force to the wrong place, off-target. Too short a handle: the hammer is inefficient because it doesn't deliver enough force, requiring more blows to complete a given task. Recently, modifications have also been made with respect to the effect of the hammer on the user. A titanium head has about 3% recoil and can result in greater efficiency and less fatigue when compared to a steel head with about 27% recoil. Handles made of shock-absorbing materials or varying angles attempt to make it easier for the user to continue to wield this age-old device, even as nail guns and other powered drivers encroach on its traditional field of use. War hammers. The concept of putting a handle on a weight to make it more convenient to use may well have led to the very first weapons ever invented. The club is basically a variant of a hammer. In the Middle Ages, the war hammer became popular when edged weapons could no longer easily penetrate some forms of armour. Symbolic hammers. The hammer, being one of the most used tools by "Homo sapiens", has been used very much in symbols and arms. In the Middle Ages it was used often in blacksmith guild logos, as well as in many family symbols. The most recognised symbol with a hammer in it is the Hammer and Sickle, which was the symbol of the former Soviet Union. The hammer in this symbol represents the industrial working class (and the sickle the agricultural working class). The hammer is used in some coat of arms in (former) socialist countries like East Germany. In Norse Mythology, Thor, the god of thunder and lightning, wields a hammer named Mjolnir. Many artifacts of decorative hammers have been found leading many modern practitioners of this religion to often wear reproductions as a sign of their faith. |