The Technical repository, by T. Gill

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Thomas Gill (patent-agent)
1825
 

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Seite 369 - Now Know Ye, that in compliance with the said proviso, I, the said Adolphe Nicole, do hereby declare that the nature of my said Invention, and the manner in which the same is to be performed, are particularly described and ascertained in and by the following statement thereof, reference being had to the Drawing hereunto annexed, and to the figures and letters marked thereon...
Seite 209 - Now know ye, that in compliance with the said proviso, I, the said Arthur Howe Holdsworth, do hereby declare that the nature of my said invention, and the manner in which the same is to be performed, are particularly tiescribed and ascertained in and by the following description thereof, reference being had to the drawing hereunto annexed, and to the figures and letters marked thereon...
Seite 221 - TJj, the copper underwent a loss of weight, which was greater in proportion as the protector was smaller; and as a proof of the universality of the principle, it was found that even ris\t part of cast iron saved a certain proportion of the copper.
Seite 386 - Table gives the contents of a pipe one inch diameter, in weight and measure, which serves as a standard for pipes of Other diameters, their contents being found by the following Rule. Multiply the numbers in the following Table against any height, by the square of the diameter of the pipe, and the product will be the number of cubic inches avoirdupois ounces, and Wine gallons of water, that the given pipe will contain. EXAMPLE. How many Wine gallons of water is contained in a pipe 6 inches diameter,...
Seite 380 - Boulton and Watt allow 25 cubic feet of space for each horse power, some of the other Engineers allow 5 feet of surface of water. STEAM — arising from water at the boiling point, is equal to the pressure of the atmosphere, which is in round numbers, 15 libs on the square inch; but to allow for a constant and uniform supply of Steam to the Engine, the safety valve of the Boiler is loaded with three libs on each square inch.
Seite 221 - ... the unprotected copper underwent rapid corrosion, becoming first red, then green, and losing a part of its substance in scales. Fortunately, in the course of these experiments, it has been proved that cast iron, the substance which is cheapest and most easily procured, is likewise most fitted for the protection of the copper. It lasts longer than malleable iron, or zinc ; and the plumbaginous substance, which is left by the action of sea water upon it, retains the original form of the iron, and...
Seite 383 - Multiply the number of horse power by 7J gallons, and divide by the number of strokes per minute; this will give the quantity of water to be raised each stroke of pump. Multiply this quantity by 231, (the number of cubic inches in a gallon,) and divide by the length of effective stroke of pump, the quotient will be the area. EXAMPLE. What diameter of pump is requisite for a 20 horse power Steam Engine having a 3 feet stroke, the effective stroke of pump to be 15 inches ? — — -= 4.6875 gallons...
Seite 221 - Fortunately, in the course of these experiments, it has been proved that cast iron, the substance which is cheapest and most easily procured, is likewise most fitted for the protection of the copper. It lasts longer than malleable iron, or zinc ; and the plumbaginous substance, which is left by the action of sea water upon it, retains the original form of the iron, and does not impede the electrical action of the remaining metal. " I had anticipated the deposition of alkaline substances in certain...
Seite 88 - The end of the nozzle pipe must be just entered into the flame, and the current of air will then throw out a cone or dart of flame from the opposite side. If it is well managed, this dart or cone will be very distinct and well defined. Care must be taken that the stream of air does not strike against any part of the wick, as it would then be disturbed and split into several parts. The jet or blast of air must be delivered somewhat above the wick ; and as unless the flame was considerable there...
Seite 50 - ... obtains, as almost to warrant the supposition that no attempt has ever been made to remove it. The remedy, however, is easy and simple in the extreme, and so evidently efficient in its application, that it cannot but excite surprise...

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