2009年5月14日星期四

Hoe (tool)

I want to introduct something about hydraulic book pressing machine. Place of Origin: China Guangdong Packaging: Paper Model Number: hm-680 Brand Name: hongming Terms of Payment: L/C,T/T Packaging: wooden case Delivery Lead Time: 7-15days HM-680 Hydraulic book pressing machine is applicable to the operation in the processes of leveling compact and forming, ect. for book cores, account books, notebooks, paper and other prints. Hydraulic drive is used for these machines, characteristic of compact in structure, light weight, small volume, stable drive, low noise, simple and easy operation, reliable performance and no-level pressure regulation, etc. Alexander BainBornOctober 1811Watten, Caithness, ScotlandDiedJanuary 2, 1877Broomhill, Kirkintilloch, ScotlandOccupationinstrument inventor, technician, and clockmakerAlexander Bain (October 1811 January 2, 1877), was a Scottish instrument inventor, technician, and clockmaker. He invented the electric clock, the electric printing telegraph, and the first facsimile machine (fax machine). Bain installed the railway telegraph lines between Edinburgh and Glasgow.Contents1 Biography 1.1 Early life 1.2 Career 1.3 Facsimile machine 1.4 Chemical telegraph 2 Later life 3 Death and legacy 4 Further reading 5 External articles // BiographyEarly lifeBain was born in Watten, Caithness, Scotland. Bain's father was a crofter. Bain had a twin sister, Margaret, and, in total, he had six sisters and six brothers. Bain did not excel in school and was apprenticed to a clockmaker in Wick.CareerHaving learned the art of clockmaking, he went to Edinburgh, and in 1837 to London, where he obtained work as a journeyman in Clerkenwell. Bain frequented the lectures at the Polytechnic Institution and the Adelaide Gallery and later constructed his own workshop in Hanover Street.In 1840, desperate for money to develop his inventions, Bain mentioned his financial problems to the editor of the Mechanics Magazine, who introduced him to Sir Charles Wheatstone. Bain demonstrated his models to Wheatstone, who, when asked for his opinion, said "Oh, I shouldn't bother to develop these things any further! There's no future in them." Three months later Wheatstone demonstrated an electric clock to the Royal Society, claiming it was his own invention. However, Bain had already applied for a patent for it. Wheatstone tried to block Bain's patents, but failed. When Wheatstone organised an Act of Parliament to set up the Electric Telegraph Company, the House of Lords summoned Bain to give evidence, and eventually compelled the company to pay Bain ?10,000 and give him a job as manager, causing Wheatstone to resign.Bain's first patent was dated January 11, 1841, and was in the names of John Barwise, chronometer maker, and Alexander Bain, mechanist. It describes his electric clock which uses a pendulum kept moving by electromagnetic impulses. He improved on this in later patents, including a proposal to derive the required electricity from an "earth battery", which consisted of plates of zinc and copper buried in the ground.In December 1841, Bain in conjunction with Lieutenant Thomas Wright RN, patented a method for using electricity to control railway engines by turning off steam, marking time, giving signals, and printing information at different locations. The most significant idea incorporated in the patent was his plan for inverting the needle telegraph earlier developed by Ampere, Wheatstone and others: instead of making signals by a pivoted magnetic needle under the influence of an electromagnet, he made them by suspending a movable coil between the poles of a fixed magnet. A similar concept appears in Sir William Thomson's siphon recorder. Bain also proposed to make the coil record messages by printing them, an idea he developed further in a subsequent patent.Facsimile machineBain invented his facsimile machine in 1843. He used a clock to synchronise the movement of two pendulums for line-by-line scanning of a message. For transmission, Bain applied metal pins arranged on a cylinder made of insulating material. An electric probe that transmitted on-off pulses then scanned the pins. The message was reproduced at the receiving station on electrochemically sensitive paper impregnated with a chemical solution similar to that developed for his chemical telegraph. In his patent description dated May 27, 1843 for "improvements in producing and regulating electric currents and improvements in timepieces, and in electric printing, and signal telegraphs," he claimed that "a copy of any other surface composed of conducting and non-conducting materials can be taken by these means". The transmitter and receiver were connected by five wires. In 1850 he applied for an improved version but was too late, as Frederick Bakewell had obtained a patent for his superior "image telegraph" two years earlier in 1848.Chemical telegraphOn December 12, 1846, Bain, who was then living in Edinburgh, patented a chemical telegraph. He had seen that the Morse and other telegraphs then in use were comparatively slow, due to the mechanical inertia of their moving parts, and realized that the signal current could be used to make a readable mark on a moving paper tape soaked in a mixture of ammonium nitrate and potassium ferrocyanide, which gave a blue mark when a current was passed through it.The speed at which marks could be made on the paper was so...(and so on) To get More information , you can visit some products about laser printing machine, ro pilot machine, . The hydraulic book pressing machine products should be show more here!

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