Who invented Printing Press

Who invented Printing Press

By ommics   00:01   1 comment:

A printing press is a device for applying pressure to an inked surface resting upon a print medium (such as paper or cloth), thereby transferring the ink. Typically used for texts, the invention and spread of the printing press was one of the most influential events in the second millennium revolutionizing the way people conceive and describe the world they live in, and ushering in the period of modernity.

The printing press was invented in the Holy Roman Empire by the German Johannes Gutenberg around 1440, based on existing screw presses. Gutenberg, a goldsmith by profession, developed a complete printing system, which perfected the printing process through all of its stages by adapting existing technologies to the printing purposes, as well as making groundbreaking inventions of his own. His newly devised hand mould made for the first time possible the precise and rapid creation of metal movable type in large quantities, a key element in the profitability of the whole printing enterprise.

The printing press spread within several decades to over two hundred cities in a dozen European countries.[3] By 1500, printing presses in operation throughout Western Europe had already produced more than twenty million volumes.[3] In the 16th century, with presses spreading further afield, their output rose tenfold to an estimated 150 to 200 million copies.[3] The operation of a press became so synonymous with the enterprise of printing that it lent its name to an entire new branch of media, the press.

The rapid economic and socio-cultural development of late medieval society in Europe created favorable intellectual and technological conditions for Gutenberg's invention: the entrepreneurial spirit of emerging capitalism increasingly made its impact on medieval modes of production, fostering economic thinking and improving the efficiency of traditional work-processes. The sharp rise of medieval learning and literacy amongst the middle class led to an increased demand for books which the time-consuming hand-copying method fell far short of accommodating

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Who invented Arquebus ?

Who invented Arquebus ?

By ommics   22:01   No comments:

The arquebus sometimes spelled harquebus, harkbus or hackbut; Italian Archibugio, Dutch haakbus, meaning "hook gun", or "hook tube" is an early muzzle-loaded firearm used in the 15th to 17th centuries. An arquebus was originally a gonne with hook, and later a matchlock firearm. Like its successor the musket, it is a smoothbore firearm, but was initially lighter and easier to carry.

It is a forerunner of the rifle and other longarm firearms. An improved version of the arquebus, the caliver, was introduced in the early 16th century. The word is derived from the English corruption of calibre as this gun was of standard bore, increasing combat effectiveness as troops could load bullets that would fit their guns (before, they would have to modify shot to fit, force it in, or cast their own before the battle). Heavy arquebuses mounted on wagons were called arquebus à croc. These carried a ball of about 3.5 ounces (100 g).

In the early 16th century, the term "arquebus" had a confusing variety of meanings. Some writers used it to denote any matchlock shoulder gun, referring to light versions as caliver and heavier pieces fired from a fork rest as musket. Others treated the arquebus and caliver synonymously, both referring to the lighter, forkless shoulder-fired matchlock. As the 16th century progressed, the term arquebus came to be clearly reserved for the lighter forkless weapon. When the wheel lock was introduced, wheel-lock shoulder arms came to be called arquebuses, while lighter, forkless matchlock and flintlock shoulder weapons continued to be called calivers. In the mid-17th century, the light flintlock versions came to be called fusils or fuzees.

The arquebus had a larger bore than its predecessors. Until the middle of the 16th century, they were fired by a matchlock mechanism, after which the newer wheellock mechanisms were used instead. The flared muzzle of some examples made it easier to load the weapon. The name 'hook gun' is often claimed to be based on the bent shape of the arquebus' butt. It might also be that some of the original arquebuses had a metal hook near the muzzle that may have been used for bracing against a solid object to absorb recoil. Since all the arquebuses were handmade by various gunsmiths, there is no typical specimen.

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Who invented Parachute ?

Who invented Parachute ?

By ommics   01:11   No comments:

A parachute is a device used to slow the motion of an object through an atmosphere by creating drag. Parachutes are usually made out of light, strong cloth, originally silk, now most commonly nylon. Parachutes often take the shape of a dome, but shapes may vary including some taking the shape of an inverted dome. Depending on the situation, parachutes are used with a variety of loads, including people, food, equipment, space capsules, and bombs.

The earliest evidence for the parachute dates back to the Renaissance period. The oldest parachute design appears in an anonymous manuscript from 1470s Renaissance Italy (British Museum Add. MSS 34,113, fol. 200v), showing a free-hanging man clutching a cross bar frame attached to a conical canopy. As a safety measure, four straps run from the ends of the rods to a waist belt. The design is a marked improvement over another folio (189v), which depicts a man trying to break the force of his fall by the means of two long cloth streamers fastened to two bars which he grips with his hands. Although the surface area of the parachute design appears to be too small to offer effective resistance to the friction of the air and the wooden base-frame is superfluous and potentially harmful, the revolutionary character of the new concept is obvious

The Venetian polymath and inventor Fausto Veranzio (1551–1617) examined da Vinci's parachute sketch, and set out to implement one of his own. He kept the square frame, but replaced the canopy with a bulging sail-like piece of cloth that he came to realize decelerates the fall more effectively. A now-famous depiction of a parachute that he dubbed Homo Volans (Flying Man), showing a man parachuting from a tower, presumably St Mark's Campanile in Venice, appeared in his book on mechanics, Machinae Novae (1615 or 1616), alongside a number of other devices and technical conceptsa

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