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Page 135 - No person otherwise entitled thereto shall be debarred from receiving a patent for his invention or discovery, nor shall any patent be declared invalid by reason of its having been first patented or caused to be patented by the inventor or his legal representatives or assigns in a foreign country...
Page 135 - ... first patented or caused to be patented in a foreign country, unless the same has been introduced into public use in the United States for more than two years prior to the application. But every patent granted for an invention which has been previously patented in a foreign country, shall be so limited as to expire at the same time with the foreign patent, or, if there be more than one, at the same time with the one having the shortest term, and in no case shall it be in force more than seventeen...
Page 69 - ... not include a waggon, cart, or other such vehicle which is constructed or adapted for use, and is used solely for the conveyance of any goods or burden in the course of trade or husbandry, and...
Page 49 - forth a theory of electrostatical induction which suggests the " idea that there may be a problem in the theory of elastic solids " corresponding to every problem connected with the distribution " of electricity on conductors or with the forces of attraction and " repulsion exercised by electrified bodies.
Page 162 - I agree with Lord Justice Fry in thinking that the point at which Mr. Edison's instrument departed from Mr. Swan's was crucial, and the departure, though slight, had all the merits of a new invention and produced a new apparatus . . . One mode of trying this question is to ask whether any one would make such a thing as Swan's lamp 'FJB 1' if he took Edison's specification as his guide?
Page 81 - Notices for the year. Provisional Orders and Licenses granted by the Board of Trade in the preceding year.
Page 51 - So that I do not admit that it is merely playing at theory, but it is helping our minds to think of possibilities, if by a model, however rough and impracticable, we show that a structure can be produced which is an incompressible frictionless liquid when no gyrostatic arrangement is in it, and which acquires a peculiar rotational elasticity or rigidity as the effect of introducing the gyrostats into these squares.
Page 81 - The difficulties that beset the electrical engineer are chiefly internal and invisible, and they can only be effectually guarded against by "testing" or probing with electric currents. They depend chiefly on leakage, undue resistance in the conductor, and bad joints, which lead to waste of energy and the production of heat.
Page 6 - top, for "brushes "read "bushes." DYNAMO-ELECTRIC MACHINERY. CHAPTER I. INTRODUCTORY. HISTORICAL NOTES AND ELECTRICAL UNITS. A dynamo-electric machine is a machine for converting energy in the form of mechanical power into energy in the form of electric currents, or vice versA, by...