. Revista estadounidense de ingeniería y ferrocarril . 17, es necesario cuando se remachan en varios grosores delmetal. La barra del dolly tiene un movimiento de V/2 pulgadas. La primera24 pulgadas se conoce como el movimiento rápido, que se establece directamente por la presión de 80 libras del tanque receptor.las últimas 2VI pulgadas es el movimiento eficaz y desarrolla la presión máxima, dando una presión uniforme a lo largo de todo el recorrido de las últimas 2% pulgadas, lo que hace que el remachado caliente del agujero se trastornará, llenando el agujero. La presión se ejerce sobre la barra del dolly a través del fluido hidrocarbónico, que no se congela, y.

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. American engineer and railroad journal . 17, is required when riveting on various thicknesses ofmetal. The dolly bar has a movement of V/2 inches. The first24 inches is known as the rapid movement, which is set downdirect by the pressure of 80 pounds from the receiver tank.The last 2Vi inches is the effective movement and develops themaximum pressure, giving a uniform squeeze throughout theentire stroke of the last 2% inches, which causes the hot rivetin the hole to be upset, filling the hole. The pressure is exerted on the dolly bar through the hydro-carbon fluid, which is non-freezing, and so long as the opera-tion valve is open, admitting compressed air to the main piston, the maximum squeeze Is maintained on the rivet. After a rivet is headed, the dolly bar and the die are posi-tively moved back from it by a quick movement of the operat-ing lever. Every detail entering into the construction of theriveter has been studied to make it satisfactory. It is made ofthe finest quality of materials, with specially designed machine. Casl<ey Hydro-Pneumatic Riveter, piston, 1.3, is of the best tool steel, accurately machined, hard-ened and ground. The inside cylinder head, 42, is of cast steel. This machine is built for very hard usage, and is intended toavoid liability of breakage. There are but four moving parts, and the operating lever, 15, is the only moving part exposed..Ml packings are easy of examination. The construction of themachine was designed to secure the maximum pressure on arivet with a minimum weight in the machine. It works rap-idly, without shock or Jar, is easy to handle and gives a uni-form pressure on every rivet. No blow is given when usingthis nuichine. and therefore no injury is imposed upon the rivetwhen being driven. The riveter is suspended by a bale which allows it to bemoved and operated in either a vertical or horizontal position;by changing the bale it can be used sideways with equal facil-ity. Suitable handles are provided on the front a

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