Journal of the Franklin Institute

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 273 - Be it known that I, John Fitch, of Philadelphia, in the county of Philadelphia, the State of Pennsylvania, have invented a new and improved mode of preventing steam-boilers from bursting, and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.
Seite 121 - Having thus described the nature of my invention, and the manner of carrying the same into effect, I would have it understood, that I do not...
Seite 387 - I went into the cube and lived in it, and using lighted candles, electrometers, and all other tests of electrical states, I could not find the least influence upon them, or indication of anything particular given by them, though all the time the outside of the cube was powerfully charged, and large sparks and brushes were darting off from every part of its outer surface.
Seite 55 - I now declare that what I claim as my invention, and wish to secure by letters patent, is the...
Seite 252 - 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 269 - The next step was to dismiss. the horse entirely, and to construct the road with two inclines, so that a descending train of loaded wagons might draw up an empty train, by means of a rope passing over a pulley at the top of the inclines, having its separate ends attached to the two trains. But, as the power of the loaded train was frequently too great for the weight it was required to draw up, a jerk was produced so as to snap the rope, or to cause the ascending train to bound off the rails; while,...
Seite 295 - What we claim as our invention and desire to secure...
Seite 66 - At the sight of a spectacle," says Cuvier, " so imposing, so terrible as that of the wreck of animal life, forming almost the entire soil on which we tread, it is difficult to restrain the imagination from hazarding some conjectures as to the cause by which such great effects have been produced.
Seite 385 - ... there seemed reason to expect some particular relation of it to the different kinds of matter through which it would be exerted, or something equivalent to a specific electric induction for different bodies, which, if it existed, would unequivocally prove the dependence of induction on the particles...
Seite 107 - A luminous star, of the same density as the earth, and whose diameter should be two hundred and fifty times larger than that of the sun, would not, in consequence of its attraction, allow any of its rays to arrive at us; it is therefore possible that the largest luminous bodies in the universe may, through this cause, be invisible.

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