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Seite 247 - 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 144 - Experiments to measure the velocity of Electricity, and the duration of Electric Light.
Seite 237 - ... have not, by inadvertence, accident, or mistake, and without any fraudulent or deceptive intention, been complied with on the part of the said inventor, it shall be lawful for the Secretary of State, upon the surrender to him of such patent...
Seite 271 - 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...
Seite 190 - Institution is formed for the purpose of enabling mechanics and artisans, of whatever trade they may be, to become acquainted with such branches of science as are of practical application in the exercise of that trade ; that they may possess a more thorough knowledge of their business, acquire a greater degree of skill in the practice of it, and be qualified to make improvements and even new inventions in the arts which they respectively profess.
Seite 98 - As a member of the patent board for several years, while the law authorized a board to grant or refuse patents, I saw with what slow progress a system of general rules could be matured. Some, however, were established by that board. One of...
Seite 169 - On the other hand, there may be a valid patent for a new combination of materials previously in use for the same purpose, or for a new method of applying such materials.
Seite 275 - To all to whom these presents shall come be it known, that I, Thomas Loud, Jun.
Seite 181 - A certain quantity of heat will make some bodies good conductors that will not otherwise conduct. 16. Thus wax rendered fluid, and glass softened by heat, will both of them conduct. 17. And water, though naturally a good conductor, will not conduct well when frozen into ice by a common degree of cold; not at all where the cold is extreme.