please help me in my assignment!___________________________________________________in my computer subject.!:-)

Question

give me a description of Jacquard's loom and I'll give you 5 points_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________can you now give me?

Answer 1

The Jacquard loom is a mechanical loom, invented by Joseph Marie Jacquard in 1801, which used the holes punched in pasteboard punch cards to control the weaving of patterns in fabric. The loom enabled even amateur weavers to weave complex designs. Each punch card corresponded to one row of the design and the cards were strung together in order. It was based on an earlier invention by the French mechanic Falcon in 1728.

Each hole in the card corresponds to a "Bolus" hook, which can either be up or down. The hook raises or lowers the harness which carries and guides the warp thread so that the weft will either lie above or below it. The sequence of raised and lowered threads is what creates the pattern. Each hook can be connected via the harness to a number of threads, allowing more than one repeat of a pattern. A loom with a 400 hook head might have 4 threads connected to each hook, giving you a fabric that is 1600 warp ends wide with four repeats of the weave going across.

It was the first machine to use punch cards to control a sequence of operations. Although it did no computation based on them, it is considered an important step in the history of computing hardware. The ability to change the pattern of the loom's weave by simply changing cards was an important conceptual precursor to the development of computer programming. Specifically, Charles Babbage planned to use cards to store programs in his Analytical engine. At first sight this may seem unremarkable but it was a clear turning point in the ability to store and re-use machine instructions. Whilst Babbage did not live to see that his ideas were viable, they have since been proved to work reliably.


Punched cards, used today to provide data and instructions to computers, were invented in the late eighteenth century by French inventor Joseph-Marie Jacquard (1752–1834) and were used to automate the weaving industry in France.

Jacquard was born on July 7, 1752 in a small village near Lyon. Both his parents worked in the weaving trade. At the age of ten, he went to work as a drawboy with his father. Drawboys had the tedious job of maneuvering by hand the weighted cords that controlled the pattern in the weaving of silk fabrics. Jacquard later invented a mechanical device to replace the drawboys. He started working on it in 1790, but his efforts were interrupted by the French Revolution. He finally succeeded in presenting a new silk drawloom at the Paris Exhibition in 1801. He completed an automated loom with punched cards controlling the weaving of very complicated patterns in 1805.

Answer 2

The Jacquard loom is a mechanical loom, invented by Joseph Marie Jacquard in 1801, which used the holes punched in pasteboard punch cards to control the weaving of patterns in fabric. The loom enabled even amateur weavers to weave complex designs. Each punch card corresponded to one row of the design and the cards were strung together in order. It was based on an earlier invention by the French mechanic Falcon in 1728.

Each hole in the card corresponds to a "Bolus" hook, which can either be up or down. The hook raises or lowers the harness which carries and guides the warp thread so that the weft will either lie above or below it. The sequence of raised and lowered threads is what creates the pattern. Each hook can be connected via the harness to a number of threads, allowing more than one repeat of a pattern. A loom with a 400 hook head might have 4 threads connected to each hook, giving you a fabric that is 1600 warp ends wide with four repeats of the weave going across.

It was the first machine to use punch cards to control a sequence of operations. Although it did no computation based on them, it is considered an important step in the history of computing hardware. The ability to change the pattern of the loom's weave by simply changing cards was an important conceptual precursor to the development of computer programming. Specifically, Charles Babbage planned to use cards to store programs in his Analytical engine. At first sight this may seem unremarkable but it was a clear turning point in the ability to store and re-use machine instructions. Whilst Babbage did not live to see that his ideas were viable, they have since been proved to work reliably.

Close-up view of the 8 x 26 hole punch cards - one card per pick (weft) in the fabricThe term "Jacquard loom" is a misnomer. It is the "Jacquard head" that adapts to a great many dobby looms such as the "Dornier" brand that allow the weaving machine to then create the intricate patterns often seen in jacquard weaving.

Jacquard looms, whilst relatively common in the textile industry, are not as ubiquitous as dobby looms which are usually faster and much cheaper to operate. However unlike jacquard looms they are not capable of producing so many different weaves from one warp. Modern jacquard looms are computer controlled and can have thousands of hooks. And inevitably, unlike Jacquard's original invention there is now no need for the use of punched cards - instead the patterns are literally computer controlled.

The threading of a jacquard loom is so labor intensive that many looms are threaded only once. Subsequent warps are then tied in to the existing warp with the help of a knotting robot which ties each new thread on individually. Even for a small loom with only a few thousand warp ends the process can take days.

Answer 3

the jacquard loom is based on the same principle of computers. In the photography you can only see the higher part of the loom.

Answer 4

force is a name given to a net influence that causes a free body with mass to accelerate. A net (or resultant) force which causes such acceleration may be the non-zero additive sum of many different forces acting on a body.

Force is a vector quantity defined as the rate of change of momentum induced in a free body by the net force acting on it, and therefore force has a direction associated with it. The SI unit of force is the newton, while the English unit of force is the pound-force.

Force was first described by Archimedes.
Galileo Galilei used rolling balls to disprove the Aristotelian theory of motion (1602 - 1607)
Isaac Newton is credited for giving the first mathematical definition of force.
Charles Coulomb is credited for experimental dicovery of the inverse square law of interaction between electric charges using torsion balance (1784).
Henry Cavendish's torsion bar experiment measured the force of gravity between two masses (1798)

heY im lAsHa. . . duh?. . .

Answer 5

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http://www.google.co.uk/search?hl=en&cr=countryUK|countryGB&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=description+of+Jacquard+loom&spell=1

Answer 6

do your own assignment.it will help you in the long run!