Journal of the Franklin InstituteFranklin Institute, 1843 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] |
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Seite 51
... metal castings , by J. Creswell . These are castings from medals , made in sand , and are so sharp and smooth as to rival copies made by the electrotype process . No. 517 , occultator , by Thomas Hill . This ingenious instrument is ...
... metal castings , by J. Creswell . These are castings from medals , made in sand , and are so sharp and smooth as to rival copies made by the electrotype process . No. 517 , occultator , by Thomas Hill . This ingenious instrument is ...
Seite 70
... Metal Forging and Cutting Machine . Although , at the late meeting of the British Association in Manchester , there were many very interesting specimens of mechanism exhibited , there was , nevertheless , one , in particular , which ...
... Metal Forging and Cutting Machine . Although , at the late meeting of the British Association in Manchester , there were many very interesting specimens of mechanism exhibited , there was , nevertheless , one , in particular , which ...
Seite 86
... metal and timbering appeared to me to be very manifest from this fact , that every engine on which I rode , that had been out but a few months , exhibited great symptoms of wear and excessive strains . In some , the driving wheels were ...
... metal and timbering appeared to me to be very manifest from this fact , that every engine on which I rode , that had been out but a few months , exhibited great symptoms of wear and excessive strains . In some , the driving wheels were ...
Seite 105
... metal resisting the strain much smaller , than has been assumed in that computation . One or all of these possible errors in the elements of my calculations , may exist ; but as I neglected no means of information available to me , I ...
... metal resisting the strain much smaller , than has been assumed in that computation . One or all of these possible errors in the elements of my calculations , may exist ; but as I neglected no means of information available to me , I ...
Seite 136
... metal around the bore of the barrel , I thought - well , this cannot burst . The rifle was very small , having two grooves in the barrel , and carrying a ball weighing the 4th of a lb. avoirdupois . The charge of powder was 20 grs . of ...
... metal around the bore of the barrel , I thought - well , this cannot burst . The rifle was very small , having two grooves in the barrel , and carrying a ball weighing the 4th of a lb. avoirdupois . The charge of powder was 20 grs . of ...
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acid action advantage amount appears applied average axle become body boiler calculated carriages carried cast cause cent Clear Cloudy color common compared consequence considerable considered construction contained continued copper cost course diameter direction distance earth effect employed engines equal exhibited expense experiments fact feet force four friction give given greater ground half heat important inches increase iron laid lead length less light load machine manner material means metal mile minute mode motion moulding nearly necessary object observed obtained passed pattern pavements Philadelphia piece plate practice present pressure produced proportion quantity rails railway reference remark resistance road sand side square steam stone sufficient supposed surface taken thickness tion wall weight wheels whole yard
Beliebte Passagen
Seite 206 - ... necessary for their preservation, and in such manner as shall be conducive to a beneficial and favorable display thereof, the models and specimens of compositions and of...
Seite 354 - If it is discontinued, provided it has been once in public use, and the recollection of it has not been altogether lost — if it has been once publicly used, it will be sufficient to invalidate the letters patent, although the use may be discontinued at the time when the patent was granted.
Seite 185 - Experiments and observations made with the view of improving the art of composing and applying calcareous cements...
Seite 285 - I conceive, right to add, that in all cases, even though the composition of the water seems to bring it within the conditions of safety now stated, an attentive examination should be made of the water after it has been running for a few days through the pipes ; for it is not improbable that other circumstances, besides those hitherto ascertained, may regulate the preventive influence of the neutral salts.
Seite 318 - Scotland, for his Invention of certain improvements in the means and machinery for deepening and excavating the beds of rivers, removing sandbanks, bars, and other obstructions to navigation.
Seite 145 - 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 136 - ... will prevent the metal from running away, and in a few minutes it will cool and take the impression, without the slightest injury to the paper from which it was taken.
Seite 28 - ... of an engineer, in regard to some of the general principles. He should accommodate a new line of road to local circumstances, so far as could be without superseding public advantages. It would be ridiculous to follow the old Roman fashion, on the mathematical axiom that a straight line is the shortest that can be drawn between two points. This would not make the most commodious road — hills must be avoided, towns must be resorted to, and the sudden bends of rivers must be shunned. It is not...
Seite 206 - And be it further enacted. That it shall be the duty of the Commissioner to cause to be classified and arranged, in such rooms or galleries as may be provided for that purpose, in suitable cases, when necessary for their preservation, and in such manner as shall be conducive to a beneficial and favorable display thereof...
Seite 355 - ... by sixteen iron screws four and a half inches in diameter. This platform has several shores on its surface, which were brought to bear equally on the vessel's bottom, to prevent her from canting over on being raised out of the water. About thirty men...