Journal of the Franklin InstitutePergamon Press, 1851 |
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angle apparatus arms arrangement attached beam blast blast furnace boiler bottom carbonic acid carriage cast iron cause centre chords claim coal combination condenser connected connexion construction curve cutters cylinder deflexion distance effect electricity engine experiments explosion fasten February 25 feet fire-box flanch flue frame Franklin Institute furnace heat horse power Improvement inches diameter increase indicator diagrams invention consists Journal length lever lime London machine machinery magnetic manner March 11 material means metal miles motion November 12 operation Ougree pass patent pipe piston plane plate present pressure produced propeller proportion pump purpose quantity radius railway Rattling Run repairs revolutions per minute roller screw shaft side sliding square inch steam steam engines steamers Stoves stroke substantially as described surface tangential tangential angle telegraph temperature tion tons tubes valve vertical vessel weight wheel wire wrought iron York
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Seite 264 - Such knowledge is the early morning light of every advancing science, and is essential to its development; but the man who is engaged in dispelling that which is deceptive in it, and revealing more clearly that which is true, is as useful in his place, and as necessary to the general progress of the science, as he who first broke through the intellectual darkness, and opened a path into knowledge before unknown to man.
Seite 209 - The Committee on Science and the Arts constituted by the Franklin Institute of the State of Pennsylvania, for the promotion of the Mechanic Arts, to whom was referred for examination a Solar Compass, invented by WM.
Seite 62 - Hence the author decides upon the place for zero, and concludes that simple space presents that case. When matter is added to space it carries its own property with it there, adding either magnetic or diamagnetic force to the space so occupied in proportion to the quantity of matter employed ; and now thinking that the point of zero is well determined, he concludes to use the word magnetic as a general term, and distinguishes the two classes of magnetic bodies into paramagnetic and diamagnetic substances.
Seite 104 - Having thus fully described my invention, what I claim therein as new and desire to secure by letters patent is . . . Second. I claim striking or forming the hollow rim at one stroke or operation, as above set forth and described.
Seite 58 - ... as there are departures from certain fixed principles of construction in either shafts or axles, in the same proportion will be their liability to fracture. Before passing to an examination of the experiments, it may assist to a more correct elucidation of the subject, if the railway axle is viewed as having certain relations to a girder in principle. Girders generally have their two ends resting on two points of support, and the load is either located at fixed distances from the props or dispersed...
Seite 309 - ... or layers, in the manner substantially as herein described. I claim — second. Making the reciprocating motion of the calender rollers of a certain fixed length ; such length determining the length of the fold, and thereby measuring the cloth, substantially in the manner herein described. At the same time I wish it to be understood that I do not claim the measurement of cloth by folding it in layers or folds of a certain length, unless such layers or folds are laid by calender or other similar...
Seite 186 - ... of the post, within the reach of the signal-man. The required positions are pointed out by a dial\ plate, the index of which is moved by a lever attached to the lower pulley. In the Report on Telegraphs for the United States, made at the request of the Hon. Levi Woodbury, Secretary of the Treasury, by the Committee on Science and the Arts of the Franklin Institute, the Committee say : — "We are disposed to recommend a much more simple instrument, nearly similar to one lately introduced by M....
Seite 68 - The progress of the development of the Law of Storms, and of the variable winds, with the practical application of the subject to navigation.
Seite 29 - ... not only so, but also, how a substitute is to be found for the hitherto constantly increasing amount of those crops ; for it will not be enough to provide the same amount of employment as before for our continually growing numbers in a branch of industry which, by its ordinary operations, necessarily brings forward those increased numbers. The uneasiness which it is natural to feel under the circumstances here described, has led to the inquiry, as diligently and as carefully as opportunity has...
Seite 380 - What I do claim as my invention, and desire to secure by letters patent, is the combining of India rubber and sulphur, either with or without shellac, for making a hard and inflexible substance, hitherto unknown, substantially as herein set forth.