ClipArt ETC
"An electric bell consists mainly of an electromagnet, E, and a vibrating armature that carries a hammer, H, that strikes a bell. One terminal of the magnet coils is connected to the binding-post, and the other terminal to the flexible support of the armature. The armature carries a spring that rests lightly against the tip of an adjustable screw at C. This screw is connected to the other binding-post. The bell is connected to a battery of 2 or 3 cells in series, a key, a push-button, P, or some other device for closing the circuit being placed in the line." -Avery 1895

Electric Bell

"An electric bell consists mainly of an electromagnet, E, and a vibrating armature that carries a hammer,…

"...in which is shown as electromagnet mounted with its poles in proximity to those of a steel magnet, and connected with a driving-wheel and belt, by which it can be given a rapid rotary motion, so that its poles alternately rotate past those of the steel magnet, producing an alternate reversal of polarity in its core by which an alternating current is generated in its coils." -Atkinson 1903

Dynamo

"...in which is shown as electromagnet mounted with its poles in proximity to those of a steel magnet,…

"If an electromagnet be subsituted for the steel magnet as shown...and the terminals of its coils connected with the brushs as shown each magnet will generate a current in the coils of the other magnet." -Atkinson 1903

Dynamo

"If an electromagnet be subsituted for the steel magnet as shown...and the terminals of its coils connected…

"The series and shunt methods of winding [a dynamo] may be combined in the same machine, producing what is called a compound wound dynamo." -Atkinson 1903

Compound Wound Dynamo

"The series and shunt methods of winding [a dynamo] may be combined in the same machine, producing what…

A generator consisting of a coil which rotates between the poles of an electromagnet causing a current to flow in.

Electric Machine for Dynamo

A generator consisting of a coil which rotates between the poles of an electromagnet causing a current…

"The electromagnet that supplies the flux of force must have a current to excite it. This current is sometimes supplied from an outside source. Such a dynamo is said to be seperately excited. Often all of the current from the armature is carried around the coils of the field magnet, thus forming a series dynamo." — Avery, 1895

Series dynamo

"The electromagnet that supplies the flux of force must have a current to excite it. This current is…

"...shows especially the construction of the series wound dynamo. The armature consists of a circular magnet mounted between two massibe pole-pieces belonging to the stationary magnet, by which it is partly inclosed, sufficient space being left on each side for it to revolve freely without contact." -Atkinson 1903

Series Wound Dynamo

"...shows especially the construction of the series wound dynamo. The armature consists of a circular…

"An electric motor that uses a square nut to engage the electromagnet which drive the motor." -Avery 1895

Electric Motor

"An electric motor that uses a square nut to engage the electromagnet which drive the motor." -Avery…

"An electromagnet is a bar of iron magnetized by an electric current, substantial as just shown." — Avery, 1895

Electromagnet

"An electromagnet is a bar of iron magnetized by an electric current, substantial as just shown." —…

"When an electromagnet is U-shaped, the coils around the two ends of the bent iron core are so wound that if the coil should be straightened either coil would appear as a continuation of the other, i.e., the current would circle around the core in the same direction in the two coils. Such magnets are often made by connecting an end of the core of one spool-shaped magnet, by a straight soft iron bar called a yoke." — Avery, 1895

Electromagnet

"When an electromagnet is U-shaped, the coils around the two ends of the bent iron core are so wound…

"Magnets so construted as to be temporarily magnetized in this way are called electromagnets" -Atkinson 1903

Electromagnet

"Magnets so construted as to be temporarily magnetized in this way are called electromagnets" -Atkinson…

"A magnet which owes its magnetic properties to the inductive action of an electric current." -Whitney, 1911

Electromagnet

"A magnet which owes its magnetic properties to the inductive action of an electric current." -Whitney,…

A magnet that is the shape of a 'U' or a horseshoe type shape. Wires wound around the core must be wound as shown, with a bridge between the two poles.

Horseshoe Electromagnet

A magnet that is the shape of a 'U' or a horseshoe type shape. Wires wound around the core must be wound…

Induction motor.

Induction Motor

Induction motor.

"Experiment illustrating Lenz's Law. If a copper ring be held in front of an ordinary elecromagnet, and the current circulating through the coil of the magnet be in such a direction as to magnetize the core as indicated b the letters S N, then as the current increases in the coil more and more of the lines of force proceeeding from N pass through the ring OO from left to right." -Hawkins, 1917

Lenz's Law

"Experiment illustrating Lenz's Law. If a copper ring be held in front of an ordinary elecromagnet,…

"Bring the two ends of the wire into contact, and thus close the circuit. The needle instantly flies around as though it was trying to place itself at right angles to the wire. Break the circuit, and the needle swings back to its north and south position. Twist the wires together, and bend the conductor into a loop so that the current passes above the needle in one direction and beneath the needle in the other direction. The deflection of the needle will be greater than before." — Avery, 1895

Needle, compass

"Bring the two ends of the wire into contact, and thus close the circuit. The needle instantly flies…

"The sounder is a telegraphic receiver consisting of an electromagnet, and a pivoted armature that plays up and down between its stops as the circuit is alternately made and broken. the message is 'read by sound,' i.e., from the clicks made by the armature, substantially as indicated [before]." -Avery 1895

Telegraph Sounder

"The sounder is a telegraphic receiver consisting of an electromagnet, and a pivoted armature that plays…