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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Results 1-5 of 100
Page 13
... increase of expense . The present number of superintendents , agents , clerks , & c . , would not be materially in . creased if the business were doubled . It is proper to remark , however , in relation to the maintenance of way , that ...
... increase of expense . The present number of superintendents , agents , clerks , & c . , would not be materially in . creased if the business were doubled . It is proper to remark , however , in relation to the maintenance of way , that ...
Page 14
... increased expenses in the mechanical department , more than equivalent to the apparent saving . To this may be added ... increasing the power without adding materially to the weight on each driving - wheel , we shall be able to select ...
... increased expenses in the mechanical department , more than equivalent to the apparent saving . To this may be added ... increasing the power without adding materially to the weight on each driving - wheel , we shall be able to select ...
Page 20
... increase the draught . In dry weather it is doubtful if there is much difference of draught between the rails laid in this way , or upon either of the other plans , though I should be inclined to think , from my observations on the ...
... increase the draught . In dry weather it is doubtful if there is much difference of draught between the rails laid in this way , or upon either of the other plans , though I should be inclined to think , from my observations on the ...
Page 24
... increasing the heating surface . I am not sure whether this division runs one way in every engine , I rather think not , and that in some engines it is across the fire - box , and in others longways . No doubt this helps to increase the ...
... increasing the heating surface . I am not sure whether this division runs one way in every engine , I rather think not , and that in some engines it is across the fire - box , and in others longways . No doubt this helps to increase the ...
Page 63
... increasing its velocity in the direction of the arrow , and parallel with the plane ; and , in acquiring this increase of velocity , it draws backward the cylinder , and is retardation . These forces are always equal , under all ...
... increasing its velocity in the direction of the arrow , and parallel with the plane ; and , in acquiring this increase of velocity , it draws backward the cylinder , and is retardation . These forces are always equal , under all ...
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Common terms and phrases
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
Popular passages
Page 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...
Page 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.
Page 185 - Experiments and observations made with the view of improving the art of composing and applying calcareous cements...
Page 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.
Page 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.
Page 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.
Page 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.
Page 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...
Page 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...
Page 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...