Джеймс Насмит: Шотландиялық инженер және өнертапқыш

Scottish mechanical engineer and inventor
the Scottish engineer

James Hall Nasmyth (sometimes spelled Naesmyth, Nasmith, or Nesmyth) (19 August 1808 – 7 May 1890) was a Scottish engineer, philosopher, artist and inventor famous for his development of the steam hammer. He was the co founder of Nasmyth, Gaskell and Company manufacturers of machine tools. He retired at the age of 48, and moved to Penshurst, Kent where he developed his hobbies of astronomy and photography.

In May 1829, Nasmyth visited Maudslay in London, and after showing him his work was engaged as an assistant workman at 10 shillings a week. Unfortunately, Maudslay died two years later, whereupon Nasmyth was taken on by Maudslay's partner as a draughtsman. When Nasmyth was 23 years old, having saved the sum of £69, he decided to set up in business on his own. He rented a factory flat 130 feet long by 27 feet wide at an old cotton mill on Dale Street, Manchester. The combination of massive castings and a wooden floor was not an ideal one, and after an accident involving one end of an engine beam crashing through the floor into a glass cutters flat below he soon relocated. He moved to Patricroft, an area of the town of Eccles, Lancashire, where in August 1836, he and his business partner Holbrook Gaskell opened the Bridgewater Foundry, where they traded as Nasmyth, Gaskell and Company. The premises were constructed adjacent to the (then new) Liverpool and Manchester Railway and the Bridgewater Canal. In March 1838 James was making a journey by coach from Sheffield to York in a snowstorm, when he spied some ironwork furnaces in the distance. The coachman informed him that they were managed by a Mr. Hartop who was one of his customers. He immediately got off the coach and headed for the furnaces through the deep snow. He found Mr. Hartop at his house, and was invited to stay the night and visit the works the next day. That evening he met Hartop's family and was immediately smitten by his 21 year old daughter, Anne. A decisive man, the next day he told her of his feelings and intentions, which was received "in the best spirit that I could desire." He then communicated the same to her parents, and told them his prospects, and so became betrothed in the same day. They were married two years later, on 16 June 1840 in Wentworth. Up to 1843, Nasmyth, Gaskell & Co. concentrated on producing a wide range of machine tools in large numbers. By 1856, Nasmyth had built 236 shaping machines. In 1840 he began to receive orders from the newly opened railways which were beginning to cover the country, for locomotives. His connection with the Great Western Railway whose famous steamship SS Great Western had been so successful in voyages between Bristol and New York, led to him being asked to make some machine tools of unusual size and power which were required for the construction of the engines of their next and bigger ship SS Great Britain.

Apart from the steam hammer, Nasmyth created several other important machine tools, including the shaper, an adaptation of the planer which is still used in tool and die making. Another innovation was a hydraulic press which used water pressure to force tight fitting machine parts together. All of these machines became popular in manufacturing, and all are still in use in modified form. Nasmyth was also one of the first toolmakers to offer a standardised range of machine tools; before this, manufacturers constructed tools according to individual clients' specifications with little regard to standardisation, which caused compatibility problems. Nasmyth was arguably the last of the early pioneers of the machine tool industry. Among Nasmyth's other inventions, most of which he never patented, were a means of transmitting rotary motion by means of a flexible shaft made of coiled wire, a machine for cutting key grooves, self adjusting bearings, and the screw ladle for moving molten metal which could safely and efficiently be handled by two men instead of the six previously required. Nasmyth's idea of a steam ram for naval warfare was never put into production. In 1844 he, together with engineer Charles May, patented the first Vacuum brake. Although milling machines were no longer novel by 1830, an example built by Nasmyth around that time stands out for its prescience. It was tooled to mill the six sides of a hex nut that was mounted in a six way indexing fixture. He also worked on a project for the conversion of iron which was not dis similar to that which was eventually patented by Henry Bessemer. A reluctant patentor, and in this instance still working through some problems in his method, Nasmyth abandoned the project after hearing of Bessemer's ideas in 1856. Bessemer, however, acknowledged the efforts of Nasmyth by offering him a one third share of the value of his patent for the eponymous Bessemer process. Nasmyth turned it down as he had decided to retire.

Nasmyth retired from business in 1856 when he was 48 years old, as he said "I have now enough of this world's goods: let younger men have their chance". He settled down near Penshurst, Kent, where he renamed his retirement home "Hammerfield" and happily pursued his various hobbies including astronomy. He built his own 20 inch reflecting telescope, in the process inventing the Nasmyth focus, and made detailed observations of the Moon. He co wrote The Moon: Considered as a Planet, a World, and a Satellite (1874) with James Carpenter (1840–1899). This book contains an interesting series of "lunar" photographs: because photography was not yet advanced enough to take pictures at very high magnification directly of the Moon itself, Nasmyth built plaster relief scale models based on his visual observations of the Moon and then photographed the models under electric illumination, replicating the shadows of the topographic contours he observed on the Moon. A crater on the Moon is named after him. He was happily married to his wife Anne, from Woodburn, Yorkshire, for 50 years, until his death. They had no children. They are buried in the north section of the Dean Cemetery in western Edinburgh. The huge memorial stands at the east end of the main east–west path, with the path dividing around it. The monument holds a well carved model of his steam hammer. James' mother, Barbara Foulis (1765 1848) is buried with them. The monument also stands as a memorial to his brother, Patrick Nasmyth (1787 1831)

In memory of his renowned contribution to the discipline of mechanical engineering, the Department of Mechanical Engineering building at Heriot Watt University, in his birthplace of Edinburgh, is called the James Nasmyth Building.