Armature
['ɑːmətʃə;-tj(ʊ)ə]
Definition
(noun.) coil in which voltage is induced by motion through a magnetic field.
Typist: Mason--From WordNet
Definition
(n.) Armor; whatever is worn or used for the protection and defense of the body, esp. the protective outfit of some animals and plants.
(n.) A piece of soft iron used to connect the two poles of a magnet, or electro-magnet, in order to complete the circuit, or to receive and apply the magnetic force. In the ordinary horseshoe magnet, it serves to prevent the dissipation of the magnetic force.
(n.) Iron bars or framing employed for the consolidation of a building, as in sustaining slender columns, holding up canopies, etc.
Editor: Upton
Examples
- The armature resistance was 0. Frank Lewis Dyer. Edison, His Life and Inventions.
- As soon as the current flows, the coils become magnetic and attract the soft iron armature, drawing it forward and causing the clapper to strike the bell. Bertha M. Clark. General Science.
- But immediately afterwards the armature springs backward and makes contact at _P_ and the entire operation is repeated. Bertha M. Clark. General Science.
- They were then carried through the receiving armature and reproduced on the receiving diaphragm, with all the same characteristics of pitch, loudness and quality. William Henry Doolittle. Inventions in the Century.
- The motor was located in the front part of the locomotive, on its side, with the armature shaft across the frames, or parallel with the driving axles. Frank Lewis Dyer. Edison, His Life and Inventions.
- 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.
- When current is made, the relay attracts an armature, which thereby closes a circuit in a local battery and thus causes a click of the sounder. Bertha M. Clark. General Science.
- To stop the locomotive, the armature circuit was opened by the main switch, stopping the flow of current, and then brakes were applied by long levers. Frank Lewis Dyer. Edison, His Life and Inventions.
- The strength of a motor may be increased by replacing the singly coiled armature by one closely wound on an iron core; in some armatures there are thousands of turns of wire. Bertha M. Clark. General Science.
- The armature circuit had a switch in it which permitted the locomotive to be reversed by reversing the direction of current flow through the armature. Frank Lewis Dyer. Edison, His Life and Inventions.
- Gramme made his armature of iron rods to prevent its destruction by heat. William Henry Doolittle. Inventions in the Century.
- By a mechanical device, tape is drawn uniformly under the light marker _P_ attached to the armature. Bertha M. Clark. General Science.
- The relay coils are connected by wire to the spring piece, S, and the armature lever is connected to earth. Frank Lewis Dyer. Edison, His Life and Inventions.
- The presence of soft iron within the armature (Section 296) causes greater attraction between the armature and the outside magnet, and hence greater force of motion. Bertha M. Clark. General Science.
- To stop, the armature circuit was opened by the main switch and the brake applied. Frank Lewis Dyer. Edison, His Life and Inventions.
- After Edison had decided this question, Upton made drawings and tables from which the real armatures were wound and connected to the commutator. Frank Lewis Dyer. Edison, His Life and Inventions.
- The strength of a motor may be increased by replacing the singly coiled armature by one closely wound on an iron core; in some armatures there are thousands of turns of wire. Bertha M. Clark. General Science.
- The heat, of whatever origin, is applied from below, and the shaft being revolved, four of the armatures lose their magnetism constantly, while the other four gain it, so to speak. Frank Lewis Dyer. Edison, His Life and Inventions.
- Watson, who helped him construct the two armatures, or vibrating discs, at the end of an electrified wire that stretched from the workshop to an adjoining room. Rupert S. Holland. Historic Inventions.
- The heating of solid armatures, the only kind then known, and poor insulation in the commutators, also gave rise to serious losses. Frank Lewis Dyer. Edison, His Life and Inventions.
- The armature, or moving part of the machine, consists in reality of eight separate armatures all constructed of corrugated sheet iron covered with asbestos and wound with wire. Frank Lewis Dyer. Edison, His Life and Inventions.
- We have calculated armatures and field coils for the new dynamo with Upton, and held the stakes for Jehl and his fellows at their winding bees. Frank Lewis Dyer. Edison, His Life and Inventions.
Editor: Tess