Magnets

Examples

• Safety clutches are numerous, by which the machine is quickly and automatically stopped by the action of electro-magnets should a workman or other obstruction be caught in the machinery. William Henry Doolittle. Inventions in the Century.
• His knowledge of magnets was tremendous. Frank Lewis Dyer. Edison, His Life and Inventions.
• Since Oersted’s first electric magnet in 1820, electric magnets have been made in a variety of forms and for many different purposes. Various. The Wonder Book of Knowledge.
• The magnets used in this river work were three and one-half feet in diameter. Various. The Wonder Book of Knowledge.
• Inside that bar there are several permanent magnets, packed on each side of the ends of the coil of wire, the poles of those on one side being the opposite of those on the other. Frederick C. Bakewell. Great Facts.
• It was of circular form, incased in iron, with the ends of several small magnets sticking through the floor. Frank Lewis Dyer. Edison, His Life and Inventions.
• The blow broke the glass carboy, and the acid ran down upon the field magnets of the dynamo, destroying the windings of one of the twelve magnets. Frank Lewis Dyer. Edison, His Life and Inventions.
• The mode now generally employed to correct deviation is by introducing on board ship masses of iron and magnets to neutralize the action of the ship’s magnetism so far as possible. Various. The Wonder Book of Knowledge.
• Set going under adequate conditions they are magnets for gathering and retaining an indefinitely wide scope of intellectual considerations. John Dewey. Democracy and Education.
• The field magnets in the multipolar machine usually are arranged in radial position around the entire circumference of the revolving armature, and are held in a fixed circular frame. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• They are operated by means of enormous magnets which are suspended at the top of the shaft. Edgar Rice Burroughs. The Gods of Mars.
• Both of these machines had permanent field magnets, and were early types of magneto-electric machines. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• In this illustration, the circuit, it will be seen, passes through both the coils of the field magnets and the coils of the armature, involving the principle of mutual excitation. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• Thus two men and two magnets did the work of twenty-eight men in less than one-fourth of the time. Various. The Wonder Book of Knowledge.
• It has been said that although Oersted was the discoverer of electro-magnetism and Ampère its expounder, Faraday made the science of magnets electrically what it is at the present day. William Henry Doolittle. Inventions in the Century.
• He observed the actions of magnets, and conjectured the fundamental identity of magnetism and electricity. William Henry Doolittle. Inventions in the Century.
• I had to devise a way of raising the voltage without changing the machine, which I did by adding extra magnets. Frank Lewis Dyer. Edison, His Life and Inventions.
• All magnets have two poles, north and south. Frank Lewis Dyer. Edison, His Life and Inventions.
• The main facts relative to magnets may be summed up as follows:-- _a_. Bertha M. Clark. General Science.
• Below the eight-inch magnets the dust is blown out of the particles mechanically, and they then go to the four-inch magnets for final cleansing and separation. Frank Lewis Dyer. Edison, His Life and Inventions.
• All magnets, whether natural, permanent or electric, possess the same magnetic properties. Various. The Wonder Book of Knowledge.
• In the field magnets of his dynamo he constructed the cores and yoke of forged iron having a very large cross-section, which was a new thing in those days. Frank Lewis Dyer. Edison, His Life and Inventions.
• In the illustration, Figs. 18 and 19, _a_ is a revolving wheel bearing the armature coils, _C_ permanent magnets, _d_ electro-magnets (field magnets), and _g_ the commutator. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• Several horse-shoe magnets are attached to two endless chains, moving over suitable wheels, and inclined at an angle of 30 degrees. Frederick C. Bakewell. Great Facts.
• There are three primary kinds of magnets: the lodestone or natural magnets, the artificial or permanent steel magnet, and the electric magnet. Various. The Wonder Book of Knowledge.
• Whatever is fine enough goes through to the eight-inch magnets, and the remainder goes back for recrushing. Frank Lewis Dyer. Edison, His Life and Inventions.
• These magnets deflect the fall of the particles rich in iron (which are attracted), while the non-magnetic particles of sand drop straight down. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• And in the same year and in 1830 he produced those powerful magnets through which the energy of a galvanic battery was used to lift hundreds of tons of weight. William Henry Doolittle. Inventions in the Century.
• Electro-magnets are usually much more powerful than other magnets of the same size. Various. The Wonder Book of Knowledge.
• The Influence of Magnets upon Each Other. Bertha M. Clark. General Science.

Checked by Andrew