Electromagnet

Examples

• The poles of the electromagnet in the local circuit are hollowed out and filled up with carbon disks or powdered plumbago. Frank Lewis Dyer. Edison, His Life and Inventions.
• The strength of any electromagnet depends upon the number of coils wound on the iron core and upon the strength of the current which is sent through the coils. Bertha M. Clark. General Science.
• When one talks into a receiver, _L_, the voice throws into vibration a sensitive iron plate standing before an electromagnet. Bertha M. Clark. General Science.
• This brings us to the gist of the ingenious way in which Edison substituted the action of electrochemical decomposition for that of the electromagnet to operate a relay. Frank Lewis Dyer. Edison, His Life and Inventions.
• The back and forth motion of the iron plate induces current in the electromagnet _c_. Bertha M. Clark. General Science.
• A horseshoe electromagnet is powerful enough to support heavy weights. Bertha M. Clark. General Science.
• This is usually done by installing at each station a local battery and a very delicate and sensitive electromagnet called the _relay_. Bertha M. Clark. General Science.
• This device is known as an electromagnet, and the charging and discharging of such a magnet may, of course, be repeated indefinitely. Frank Lewis Dyer. Edison, His Life and Inventions.
• Henry had succeeded in perfecting the electromagnet, that dial and printing telegraphs were successfully produced. William Henry Doolittle. Inventions in the Century.
• It is thus attracted toward an adjacent electromagnet when cold and is uninfluenced when hot, and as the result motion is produced. Frank Lewis Dyer. Edison, His Life and Inventions.
• An essential part of this relay consists of a swinging PERMANENT magnet, C, whose polarity remains fixed, that end between the terminals of the electromagnet being a north pole. Frank Lewis Dyer. Edison, His Life and Inventions.
• This consists of an electromagnet, T, operated by a key, K, and separate battery. Frank Lewis Dyer. Edison, His Life and Inventions.
• The ringing of the electric bell is due to the attractive power of an electromagnet. Bertha M. Clark. General Science.
• As soon as the current ceases to flow, the electromagnet loses its magnetic power and becomes merely iron and wire without magnetic attraction. Bertha M. Clark. General Science.
• Such an arrangement is called an electromagnet. Bertha M. Clark. General Science.
• It will be understood that electromagnets were the ticker's actuating agency. Frank Lewis Dyer. Edison, His Life and Inventions.
• In a shunt circuit with the receiving instrument he introduced electromagnets. Frank Lewis Dyer. Edison, His Life and Inventions.
• In such an arrangement there is practically the strength of two separate electromagnets. Bertha M. Clark. General Science.
• Electromagnets are used in place of simple magnets, and the armature, instead of being a simple coil, may be made up of many coils wound on soft iron. Bertha M. Clark. General Science.
• The strongest known magnets are electromagnets, which, as we have seen, are merely coils of wire wound on an iron core. Bertha M. Clark. General Science.
• The electromagnets and other actuating mechanism cannot be seen plainly in this figure, but are produced diagrammatically in Fig. 2, and somewhat enlarged for convenience of explanation. Frank Lewis Dyer. Edison, His Life and Inventions.

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