Magnet

Examples

• Gale suggested that his simple electro-magnet, with its few turns of thick wire, should be replaced by one with a coil of long thin wire. Rupert S. Holland. Historic Inventions.
• If a close coil of wire is suspended between the poles of a strong horseshoe magnet, it will not assume any characteristic position but will remain wherever placed. Bertha M. Clark. General Science.
• The simplest form of electric magnet is shown in Fig. 2. Various. The Wonder Book of Knowledge.
• If a delicately made magnet is suspended as in Figure 223, and is allowed to swing freely, it will always assume a definite north and south position. Bertha M. Clark. General Science.
• So far Morse had only used his recorder over a few yards of wire, his electro-magnet had been of the simplest make, and his battery was a single pair of plates. Rupert S. Holland. Historic Inventions.
• Iron filings scattered over a magnet arrange themselves in definite lines. Bertha M. Clark. General Science.
• The cylinder stops, and current operates the sluggish press-magnet, causing its armature to be attracted, thus lifting the platen and its projecting arm. Frank Lewis Dyer. Edison, His Life and Inventions.
• The result of moisture in the interior of a magnet is to weaken the effectiveness of the installation, leading eventually to short circuits and burn-outs. Various. The Wonder Book of Knowledge.
• Again, plac e the magnet in a wooden vessel, and then set the vessel afloat in a tub or cistern of still water. Walter Libby. An Introduction to the History of Science.
• In 1840 Davenport, by means of his electric motor, printed a news sheet called the _Electro Magnet and Mechanics’ Intelligencer_. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• As the magnet recedes from the coil, it carries lines of force away with it, this time reducing the number of the lines which cut the coil. Bertha M. Clark. General Science.
• Another form of the electric magnet is shown in cross-section in Fig. 3. Various. The Wonder Book of Knowledge.
• The motion of a magnet within a coil of wire produces a current of electricity. Bertha M. Clark. General Science.
• 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.
• These inventors conceived and put in practice the great idea of employing the current from an electro-magnetic machine to excite its own electric magnet. William Henry Doolittle. Inventions in the Century.
• 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.

Typed by Claire