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Updated: May 9, 2025
'Dudley wanted to show me the commutator on the exhaust-box or the windscreen, or something, and he was just bending over when Eustace jumped out from nowhere and pinned him. I'm afraid he has taken it to heart rather. Roscoe Sherriff pondered. 'Is this worth half a column? He shook his head. 'No, I'm afraid not. The public doesn't know Pickering.
Tesla produced his admirable and epoch-marking motors for multiphase alternating currents, in which, going back to his ideas of long ago, he evolved machines having neither commutator nor brushes. It will be remembered that about the time that Mr.
Benny himself, his red hair combed flat on his head and oiled like a missing commutator, wore a Japanese silk dressing-gown which would have fired a steam car. His breakfast, I observed, consisted of one brandy-and-soda and a bunch of grapes; but the cigar he offered me was as long as a policeman's boot, and the fellow to it stuck out of a mouth as full of fine white teeth as a pod of peas.
His answer was that the air-spaces constituted the value of his plan, as the particles of graphite falling into them would be thrown out by the action of centrifugal force as the commutator revolved. And thus it occurred as a matter of fact, and the trouble was remedied. This idea was subsequently adopted by a great manufacturer of generators.
The commutator is so constructed as to keep the coil, B, on short circuit from the position of coincidence with the plane of C to the position where the plane of B is at right angles to that of C; and to keep the coil, B, open-circuited from the right-angled position, or thereabouts, to the position of parallel or coincident planes.
It will be guessed from what has been previously said on the subject of induction that the currents from such an electro-magnetic machine would be alternating currents, the impulses succeeding each other in alternate directions. To remedy this and cause the currents to flow always in the same direction, the "commutator" was devised.
It was quite dark when he was aroused by the sound of a door opening. "Who is there?" he asked, touching a commutator. Suddenly, in consequence of the vibrations produced, the air became luminous. "Ah! you, Doctor?" "Yes," was the reply. "How are you?" "I am feeling well." "Good! Let me see your tongue. All right! Your pulse. Regular! And your appetite?" "Only passably good." "Yes, the stomach.
Constans had no recourse but to obey, and for several hours they worked steadily, experimenting with the intricacies of switch-board and commutator, stringing various wires about the hall and noting the conditions under which they might be charged and discharged from the central source of power.
It consists of a single armature core with a motor winding and a generator winding on it and each of these has its own commutator. Where the low voltage current flows into one of the windings it drives its as a motor and this in turn generates the higher voltage current in the other winding. Get a 100 watt 350 volt motor-generator; it is shown at F and costs about $75.00. The Panel Cut-Out.
Currents are generated in the coils, now in one direction then in another, as they revolve or cross different parts of the field; and, by means of a device termed a commutator, these currents can be collected or sifted at will, and led away by wires to an electric lamp, an accumulator, or an electric motor, as desired.
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