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Institution, 1851 - Mechanical engineering
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Page 3 - GENERAL MEETING of the Members was held at the house of the Institution, Newhall Street, Birmingham, on Wednesday, 28th January, 1857 ; JOSEPH WHITWORTH, Esq., President, in the Chair.
Page 3 - President, in the Chair. The SECRETARY read the Minutes of the last General Meeting, which were confirmed. The...
Page 34 - ... the steam would be effected, with the same power. The Chairman said, the subject of the application to locomotive engines was one of great importance, and he hoped it would be brought before the Institution in another paper. He proposed a vote of thanks to Mr. Siemens for his paper, which was passed. The following paper, by Mr.
Page 15 - ... is left all round the chamber, separating it from the next workings ; and the entrance from the gate-road is securely walled up, to exclude the air, and prevent spontaneous combustion, which would otherwise, in a short period, take place. When an explosion occurs, it is generally followed by a second, or more, as portions of the gas become successively charged with the due proportions of air ; and the liability to these terrible explosions will always remain in mines thus worked, till, by some...
Page 22 - A very considerable amount of outlay, as well as frequently a great loss of time, is incurred in obtaining the necessary supplies of air for working the successive strata of a mine. Whereas the Air Chimney is accessible at any point in the Shaft, and the Shaft is always kept well aired, which is of importance...
Page 39 - SMALL ARMS, machinery for manufacture of rifles and cartridges, &c. breechloading mechanism. BLASTING, facts relating to blasting under water, and blasting generally use of gun-cotton, dynamite, &c.
Page 30 - ... with undefined rapidity, if it were not retarded by the second and third, or by the presence of some permanent gases, which accumulate on the condensing surfaces and prevent their immediate contact with the steam. The second (conduction) varies in direct proportion with the conducting power of the metal, and with its thickness ; but the conducting power of copper is so great that its thickness seems to exercise no appreciable influence on the amount of heat transmitted in a given time. This interesting...
Page 27 - Engine will continue to work high-pressure as usual ; moreover, it does not interfere with the working parts of the Engine. The advantages which would result from a vacuum in the cylinder of a Locomotive Engine, have been ably set forth by Mr. Edward Woods, in his " Observations on the Consumption of Fuel and Evaporation of Water in Locomotive and other Steam Engines.
Page 26 - ... would be to diminish the velocity of the ascending column, and to lose the increased temperature the air had acquired in passing through the mine. Another objection was, that in some of the thinner veins no upper air-head could be driven at a sufficient height to allow the gas to escape by its own levity, or to prevent it from getting admission to the workings. There may be exceptional cases as, for example, if a mine can be supposed to lie upon a perfectly horizontal plane (but the author...
Page 28 - ... Condenser, shown in Fig. 1. In it the steam, at the time when it is released from the cylinder, has not sufficient force to expel the air and heated water from the Condenser into the atmosphere, and a partially vacuous space must be provided for their reception. For this purpose, that side, B...

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