The Mechanics' Magazine, Museum, Register, Journal, and Gazette, Band 35M. Salmon, 1841 |
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Seite 9
... side by side with their dis- similar poles against each other . Two other bars of the same description are placed at right angles on the middle of the former . This makes four successive rows of magnetic bars , each row pos- sessing a ...
... side by side with their dis- similar poles against each other . Two other bars of the same description are placed at right angles on the middle of the former . This makes four successive rows of magnetic bars , each row pos- sessing a ...
Seite 11
... side of the platform of a locomotive engine two iron rods are suspended by eye - bolts , their upper ends , which are bent , being in- serted into the eye - bolts , so as to allow the lower ends of the rods to vibrate to and fro , these ...
... side of the platform of a locomotive engine two iron rods are suspended by eye - bolts , their upper ends , which are bent , being in- serted into the eye - bolts , so as to allow the lower ends of the rods to vibrate to and fro , these ...
Seite 12
... sides . In each side of the house there is an opening , closed by flaps , the interior of which is convex , the exterior plane . Midway between these openings a gong is suspended , and when it is desired to sound the gong , in either ...
... sides . In each side of the house there is an opening , closed by flaps , the interior of which is convex , the exterior plane . Midway between these openings a gong is suspended , and when it is desired to sound the gong , in either ...
Seite 14
... side . This vessel is closed in by two lids , each of them in the form of half a hollow cylinder , and having a smooth bottom flange , and furnished with joints by means of which the lids may be opened for the purpose of placing and ...
... side . This vessel is closed in by two lids , each of them in the form of half a hollow cylinder , and having a smooth bottom flange , and furnished with joints by means of which the lids may be opened for the purpose of placing and ...
Seite 27
... side and end slabs are then brought down to a proper thickness , so as exactly to fit into the square groove in the bottom slab , and along both sides of the SPECIFICATIONS OF RECENT ENGLISH PATENTS . 27.
... side and end slabs are then brought down to a proper thickness , so as exactly to fit into the square groove in the bottom slab , and along both sides of the SPECIFICATIONS OF RECENT ENGLISH PATENTS . 27.
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Häufige Begriffe und Wortgruppen
acid action apparatus applied atoms attached axle boat boiler bolt bottom Boulton and Watt carbon carbonic acid carriage cause centre CIVIL ENGINEER claim CLYDE STEAMERS coal combustion communication connected construction Cornish engines crank described diameter Duchess of Kent effect Enrolment Office equal evaporative experiments fastened feet fluid force frame fuel furnace Galignani gines give heat improvement consists inches invention iron J. C. Robertson John Scott Russell latent heat length lever machine machinery manufacture matter means mechanical ment metal mode motion moulds obtained passing patent Pilbrow pipe piston placed plate portion present pressure produced propelling Published by J. C. purpose quantity railway reverberatory furnace rollers Rolls Chapel screw September 22 shaft side six months sliding space speed spring steam steam navigation steam-engine stroke surface Symington temperature thread tion tons tube upper vacuum valve vapour vessel weight wheel William
Beliebte Passagen
Seite 125 - I have also reason to believe that the power of the STEAM ENGINE may be applied to work the WHEELS, so as to give them a quicker motion, and consequently, to increase that of the ship. In the course of this summer, I intend to make the experiment; and the result, if favourable, shall be communicated to the public.
Seite 298 - Somerset, then lord protector, a new office was erected for him ; he was made governor of the mystery and company of the merchant adventurers for the discovery of regions, dominions, islands, and places unknown, a pension was granted him by letters patent £166, 13s.
Seite 342 - It will be observed that above one inch diameter the same pitch is used for two sizes. This could not have been avoided without introducing small fractional parts. The economy of screwing apparatus was also promoted by repetition of the thread. It is important to remark that the proportion between the pitch and the diameter varies throughout the entire scale. Thus, the pitch of the...
Seite 132 - We left the fair city of New York; we passed through the romantic and ever-varying scenery of the highlands ; we descried the clustering houses of Albany; we reached its shores; and then, even then, when all seemed achieved, I was the victim of disappointment. Imagination superseded the influence of fact. It was then doubted, if it could be done again ; or if done, it was doubted if it could be made of any great value.
Seite 342 - A constant proportion is thus established between the depth and the pitch of the thread. In calculating the former, a deduction is to be made for the quantity rounded off, amounting to one-third of the whole depth, that is, one-sixth from the top, and one-sixth from the bottom of the thread. Making this deduction, it will be found that the angle of 55° gives for the actual depth rather more than three-fifths, and less than two-thirds of the pitch. The precaution of rounding off, is adopted to prevent...
Seite 342 - ... bolts, besides being weaker and less durable, might render it difficult to unfix them when occasion required. It will be remembered that the threads of which the preceding table shows the average, are used in cast iron as well as wrought, and this circumstance has no doubt had its effect in rendering them coarser than they would have been, if restricted to wrought iron.
Seite 339 - ... machinery. Great inconvenience is found to arise from the variety of threads adopted by different manufacturers. The general provision for repairs is rendered at once expensive and imperfect. The difficulty of ascertaining the exact pitch of a particular thread, especially when it is not a submultiple of the common inch measure, occasions extreme embarrassment. This evil would be completely obviated by uniformity of system, the thread becoming constant for a given diameter. The same principle...
Seite 472 - In such case, one half of the oxygen absorbed goes to form steam, by its union with the hydrogen ; while the other half forms carbonic acid, by its union with the carbon. Both constituents being thus supplied with their equivalent volumes of the supporter, the process would here be complete — perfect combustion would ensue, and no smoke be formed ; the quantity of air employed being ten times the rolume of the yas consumed.
Seite 339 - ... consideration. It does not appear that any combined effort has been hitherto made to attain this object As yet there is no recognized standard. This will not be matter of surprise, when it is considered that any standard must be to a great extent arbitrary. It is impossible to deduce a precise rule from mechanical principles, or from any number of experiments. On the other hand, the nature of the case is such that mere approximation would be unimportant, absolute identity of thread being indispensable....
Seite 125 - ... have also reason to believe that the power of the STEAM ENGINE may be applied to work the wheels, so as to give them a quicker motion, and consequently to increase that of the ship.