Bulletin, Ausgabe 228U.S. Government Printing Office, 1963 |
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Häufige Begriffe und Wortgruppen
19th century Ampère Annals of Electricity apparatus arc light armature battery beam Bell boilers Boulton and Watt British patent cable carbon cell circuit coil crank crosshead Daniell cell device dynamo electric motor Electric Telegraph electrodes electromagnet feet Figure footnote Franklin Institute Franz Reuleaux Galvanic Gauss glass Gramme Grove cell Henry Fitz HISTORY AND TECHNOLOGY Holcomb inches instrument invention inventors James James Watt Journal of Science kinematics London lower deck Lumière électrique machine magnet mainmast Marestier Marestier's sketch mechanisms metal mirror Morse MUSEUM OF HISTORY National Museum needle Observatory packet ships paddle wheel paper Paris Peate Peate's Philosophical Magazine plates Preston produced Professor reflector refractor Reuleaux Savannah Siemens signals Smithsonian Institution Smithsonian photo stack steam engine straight-line linkage straight-line mechanism Sturgeon's Annals telegraph line telephone telescope tion transmitter trough battery U.S. patent USNM Voltaic Watt Watt's Wheatstone wheel shaft William wire York zinc
Beliebte Passagen
Seite 199 - Glasgow, who nursed it as if it had been his own child, and when a motion was made to relieve him of it, replied, "No! I have not had nearly enough of it — it is the most beautiful thing I have ever seen in my life.
Seite 174 - 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 183 - I presumed that your engine would require money, very accurate workmanship and extensive correspondence to make it turn out to the best advantage, and that the best means of keeping up the reputation and doing the invention justice would be to keep the executive part out of the hands of the multitude of empirical engineers, who from ignorance, want of experience and want of necessary convenience, would be very liable to produce bad and inaccurate workmanship; all of which deficiencies would affect...
Seite 187 - ... which I look upon as a capital saving ; and it will answer for double engines as well as for single ones. I have only tried it in a slight model yet, so cannot build upon it, though I think it a very probable thing to succeed, and one of the most ingenious simple pieces of mechanism I have contrived, but I beg nothing may be said on it till I specify.
Seite 370 - On the Conversion of Dynamical into Electrical Force without the aid of Permanent Magnetism," by CW Siemens, FRS The author says, " An experiment has been suggested to me by my brother, Dr.
Seite 211 - Mill and other Gearing, Presses, Horology, and Miscellaneous Machinery ; and including many movements never before published, and several of which have only recently come into use.
Seite 187 - I have started a new hare. I have got a glimpse of a method of causing a piston rod to move up and down perpendicularly, by only fixing it to a piece of iron upon the beam, without chains, or perpendicular guides, or untowardly frictions, arch-heads, or other pieces of clumsiness...
Seite 198 - The perfect parallel motion of Peaucellier looks so simple and moves so easily that people who see it at work almost universally express astonishment that it waited so long to be discovered. The idea of the facility of the result by a natural mental illusion gets transferred to the process of conception, as if a healthy babe were to be accepted as proof of an easy act of parturition. No impression can be more erroneous. The...
Seite 174 - ... for viewing faint objects near the moon, or satellites near their primaries, the committee are of opinion may be removed by enlarging the aperture of the Herschelian reflector to five or five and a half inches. The simplicity of the method of preparing and mounting Mr. Holcomb's...
Seite 246 - On the Method of Producing Copies of Engraved Copper-Plates by Voltaic Action; on the Supply of Mixed Gases for Drummond's Light, by Electrolysis; on the Application of Electro-Magnetism as a Motive Power in Navigation, and on Electro-Magnetic Currents," Philosophical Magazine, 1839, vol.