Minutes of Proceedings of the Institution of Civil Engineers, Bindi 69The Institution, 1882 Vols. 39-204 (1874/75-1916/17) have a section 3 containing "Abstracts of papers in foreign transactions and periodicals" (title varies); issued separately, 1919-37, as the institution's Engineering abstracts from the current periodical literature of engineering and applied science, published outside the United Kingdom. |
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Common terms and phrases
acid ammonia amount anemometer apparatus atmosphere Author bracing bridge calculated carbonic carbonic acid cent Centigrade centimetres centre coefficient combustion compression considerable cubic feet cubic foot cubic metres curve cylinder diagram diameter dissociation dynamite effect electromotive force engine experiments explosion Fahrenheit firedamp foot-lbs force fracture friction gas-engine gases girders given greater holes horizontal hour ignition increased indicator diagram inflammation instrument iron joint kilograms length machine maximum pressure means measured Messrs metal metres miles millimetres Minutes of Proceedings mixture motion observed obtained Paper piers piston Proceedings Inst proportion punched quantity railway ratio resistance revolutions revolutions per minute river rivets shearing solid plate span speed square foot square inch steam-engine steel strain strength stroke structures surface temperature tensile tensile strength tests tons per square tube velocity vertical viaduct volume weight wind wind-pressure wrought iron
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Síða 6 - Plates may be received or rejected without a trial of every thickness on the invoice. (7) The pieces of plate cut out for testings are to be of parallel width from end to end, or for at least 8 inches of length. When the plates are ordered by thickness, their weight is to be estimated at the rate of 40 Ibs.
Síða 243 - ... of a second. It does not matter whether the mixture used is rich or weak in gas ; the rich mixture can be fired slowly and the weak one rapidly, just as may be required. The rate of ignition of the strongest possible mixture is so slow that the time of attaining complete inflammation depends on the amount of mechanical disturbance permitted.
Síða 224 - Ibs. per square inch above the atmosphere. The motor-piston is now at the beginning of its out-stroke, and as it moves forward air from the reservoir enters the cylinder, but as it enters it is heated to 1,537° Centigrade, without rise in pressure ; the motor-piston sweeps through 2 cubic feet.
Síða 6 - Fahrenheit, must stand bending in a press to a curve of which the inner radius is one and a half times the thickness of the steel tested. The strips arc all to be cut in a planing machine, and to have the sharp edges taken off.
Síða 222 - From the reservoir the mixture enters into a cylinder, being ignited as it enters, without rise in pressure, but simply increased in volume, and following the piston as it moves forward, the return stroke discharges the products of combustion. 3. An engine in which a mixture of gas and air is compressed or introduced under compression into a cylinder, or space at the end of a cylinder, and then ignited while the volume remains constant and the pressure rises. Under this pressure the piston moves...
Síða 227 - ... of heat into work. With any given maximum temperature the smaller the difference between that temperature and the temperature of compression, the greater is the proportion of added heat converted into work with any given amount of expansion.
Síða 225 - Ibs. above the atmosphere. This is shown at Fig. 1, and also at Fig. 4, which is the diagram of this type of engine, abcd is the compression diagram ; ab ef the motor diagram. The piston continues to move forward, and the air expands doing work. At the end of the stroke the pressure has fallen to 8.4 lbs.
Síða 227 - That is, in an engine of type 1, if 100 heat-units be used, 21 units will be con verted into mechanical work. In type 2, with the same amount of heat, 36 units will be given as work, and in type 3 no less than 45 units would be converted into work. The great advantage of compression over no compression is clearly seen, by the simple operation of compressing before heating ; the last type of engine gives for the same expenditure of heat 2.1 times as much work as the first. Compression, as used by...
Síða 224 - Centigrade is taken in, compressed without loss of heat, the temperature rising under the compression to 217°'5 Centigrade. When it is equal to the pressure in the reservoir it is forced into the reservoir, as is shown on the line b c. In all the operations no loss or gain of heat is assumed, except in doing work or in work being done on the air. In the motor-diagram from C to E the air is flowing from the reservoir following the piston, and the temperature is 1,537° Centigrade during the whole...
Síða 6 - Strips cut lengthwise or crosswise of the plate to have an ultimate tensile strength of not less than 26, and not exceeding 30 tons per square inch of section, with an elongation of 20 per cent in a length of 8 inches.