Commutator
[kɒmjuteitә]
Definition
(noun.) switch for reversing the direction of an electric current.
Checked by Balder--From WordNet
Definition
(n.) A piece of apparatus used for reversing the direction of an electrical current; an attachment to certain electrical machines, by means of which alternating currents are made to be continuous or to have the same direction.
Edited by Bertram
Examples
- 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.
- This is accomplished by the use of a commutator. Bertha M. Clark. General Science.
- The commutator had 73 sections. Frank Lewis Dyer. Edison, His Life and Inventions.
- As armature, commutator, and shaft rotate, the brushes connect first with one segment of the commutator and then with the other. Bertha M. Clark. General Science.
- But no matter how complex these various parts may seem to be, the principle is always that stated in Section 309, and the parts are limited to field magnet, commutator, and armature. Bertha M. Clark. General Science.
- He suggested the cutting out of the mica pieces almost to the bottom, leaving the commutator bars separated by air-spaces. Frank Lewis Dyer. Edison, His Life and Inventions.
- The other binding post of the commutator 3 extends to one terminal of an isolated primary coil 4, and the other terminal of this coil connects with the dynamo. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
- Carbon for commutator brushes has been superseded by graphite in some cases, the latter material being found much more advantageous, electrically. Frank Lewis Dyer. Edison, His Life and Inventions.
- He was also the first to use mica in insulating the commutator sections from each other. 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.
- Gramme employed the commutator to make the current direct instead of alternating. William Henry Doolittle. Inventions in the Century.
- This armature consists of coils or bobbins of insulated wire, each section having its terminals connected with separate insulated plates on the hub, which plates are known as the commutator. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
- The mechanical reversal of the current is accomplished by the use of the commutator, which is a metal ring split into halves, well insulated from each other and from the shaft. Bertha M. Clark. General Science.
- Edison also improved the armature by dividing it and the commutator into a far greater number of sections than up to that time had been the practice. Frank Lewis Dyer. Edison, His Life and Inventions.
- It was in his machine also that mica was used for the first time as an insulating medium in a commutator. Frank Lewis Dyer. Edison, His Life and 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.
Checked by Clive