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A table engine is a variety of stationary steam engine where the cylinder is placed on top of a table-shaped base, the legs of which stand on the baseplate which locates the crankshaft bearings. The piston rod protrudes from the top of the cylinder and has fixed to it a cross-head which runs in slides attached to, and rising from, the cylinder top. Long return rods connect the crosshead to the crankshaft, on which is fixed the flywheel. Henry Maudslay patented an improved version of this a few years later, and other makers adopted the configuration.

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  • Motor de mesa (es)
  • Table engine (en)
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  • Un motor de mesa es una variedad de motor de vapor estacionario donde el cilindro se coloca encima de una base en forma de mesa, cuyas patas se sitúan en la placa base que ubica los cojinetes del cigüeñal. El vástago del pistón sobresale de la parte superior del cilindro y tiene fijada una cruceta que se desplaza sobre unas correderas unidas y que se elevan desde la parte superior del cilindro. Largas conectan la cruceta al cigüeñal, en el que se fija el volante. (es)
  • A table engine is a variety of stationary steam engine where the cylinder is placed on top of a table-shaped base, the legs of which stand on the baseplate which locates the crankshaft bearings. The piston rod protrudes from the top of the cylinder and has fixed to it a cross-head which runs in slides attached to, and rising from, the cylinder top. Long return rods connect the crosshead to the crankshaft, on which is fixed the flywheel. Henry Maudslay patented an improved version of this a few years later, and other makers adopted the configuration. (en)
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  • Un motor de mesa es una variedad de motor de vapor estacionario donde el cilindro se coloca encima de una base en forma de mesa, cuyas patas se sitúan en la placa base que ubica los cojinetes del cigüeñal. El vástago del pistón sobresale de la parte superior del cilindro y tiene fijada una cruceta que se desplaza sobre unas correderas unidas y que se elevan desde la parte superior del cilindro. Largas conectan la cruceta al cigüeñal, en el que se fija el volante. Este tipo de motor fue introducido por primera vez por en el en 1798, con la particularidad de que se podía instalar dentro de una edificación independientemente, al contrario de lo que sucedía con los motores de balancín, cuya edificación normalmente formaba parte integrante de la propia máquina de vapor. Henry Maudslay patentó una versión mejorada de esta máquina unos años más tarde, y otros fabricantes adoptaron la misma configuración. Se utilizaba alrededor de la primera mitad del siglo XIX en aplicaciones de baja velocidad y de baja potencia, fabricándose en una gran variedad de tamaños, incluyendo modelos muy pequeños, con un diámetro y una carrera de tan solo unas pocas pulgadas.​ El motor de mesa fue uno de los primeros tipos​ en los que el motor era construido como una unidad independiente, en lugar de formar parte de una edificación. Esto hizo que los motores fueran más baratos, y lo que es más importante, requerían muy poco tiempo para ser instalados en su lugar de trabajo, pudiéndose probar los motores completos en la fábrica antes de la entrega. Además, podían fabricarse seriadamente, para su venta en existencia, en lugar de tener que ser diseñados y construidos a medida para cada lugar. Una razón para el uso continuado del cilindro vertical​ fue la creencia de que con un cilindro horizontal, el peso del pistón dentro del cilindro provocaría un desgaste desigual en el orificio inferior del cilindro. Esta visión errónea no se disipó hasta alrededor de 1830, ante el creciente número de locomotoras de vapor que utilizaban cilindros horizontales sin tales problemas de desgaste. (es)
  • A table engine is a variety of stationary steam engine where the cylinder is placed on top of a table-shaped base, the legs of which stand on the baseplate which locates the crankshaft bearings. The piston rod protrudes from the top of the cylinder and has fixed to it a cross-head which runs in slides attached to, and rising from, the cylinder top. Long return rods connect the crosshead to the crankshaft, on which is fixed the flywheel. This pattern of engine was first introduced by James Sadler at the Portsmouth Dockyard in 1798 and was house-built in that its framing was formed by the engine house, as had been common practice for beam engines. Henry Maudslay patented an improved version of this a few years later, and other makers adopted the configuration. It was supplied for low-speed, low-power applications around the first half of the nineteenth century. They continued to be made in a range of sizes, down to very small, with a bore and stroke of only a few inches. The table engine was one of the first types where the engine was constructed as an independent unit, rather than being house-built. This made the engines cheaper, and more importantly quicker, to erect on site. Entire engines could be built and tested at their factory before delivery. Engines could also be pre-built, then offered for sale from stock, rather than having to be designed and constructed for each site. One reason for the continued use of a vertical cylinder was the belief that with a horizontal cylinder, the weight of the piston within the cylinder would lead to uneven wear on the lower bore of the cylinder. This erroneous view was not dispelled until around 1830 and the increasing number of steam locomotives using horizontal cylinders without such wear problems. (en)
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