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Updated: June 1, 2025
We could get even more than 7 horse power out of this machine, by either running it at an excessive speed, or by using excessive currents; in both cases, however, we should shorten the life of the apparatus. An electro-motor consists, generally, of two or more electro-magnets so arranged that they continually attract each other, and thereby convey power.
Four water tanks were carried, one at each end and two in the middle, and the water was expelled by four pumps worked by a little electro-motor; these pumps also furnished the air necessary for the crew and for the discharge of the torpedoes. For underwater vision, an optical tube and a periscope had been provided. On July 5, 1899, still another submarine boat was launched for the French Navy.
This tube of wax is filed upon a metal barrel like a sleeve, and the barrel, which forms part of a horizontal spindle, is rotated by means of a silent electro-motor, controlled by a very sensitive governor. A motion of translation is also given to the barrel as it revolves, so that the marking stylus held over it describes a spiral path upon its surface.
Beyond this, I'll mention that sodium batteries have been found to generate the greater energy, and their electro-motor strength is twice that of zinc batteries." "Captain, I fully understand the excellence of sodium under the conditions in which you're placed. The sea contains it. Fine. But it still has to be produced, in short, extracted. And how do you accomplish this?
The proper test for an electro-motor, therefore, is not merely its efficiency, or the quotient of the mechanical power given out, divided by the electrical energy put in, but also the number of feet it could raise its own weight in a given space of time, with a given current, or, in other words, the number of foot pounds of work each pound weight of the motor would give out.
The box below the table contains the voltaic battery which actuates the electro-motor. A machine which aims at recording and reproducing actual speech or music is, of course, capable of infinite refinement, and Edison is still at work improving the instrument, but even now it is substantially perfected. Phonographs have arrived in London, and through the kindness of Mr.
"I have discovered something, and I am trying to invent a means of turning it to account. It will be only a cheap electro-motor if it comes to anything." "You must explain that to me some day, Mr. Conolly. I'm afraid I dont know what an electro-motor means." "I ought not to have mentioned it," said Conolly. "It is so constantly in my mind that I am easily led to talk about it.
In this case the magnetic rotations are produced in an electro magnet by means of alternate currents supplied by alternating Gramme machine. In order to better explain the action, it will be necessary to refer to a new electro-motor, which was the subject of an article in the Electrical Review of February 19 last.
The apparatus shown in the sketch consists essentially of a perforated basket, A, which is slipped on to a cone attached to the spindle, S, of an electro-motor, and held in position by the nut, D. The casing, B, with its removable cover, C, serves to receive the liquid driven out of the substance being dried.
The motive power was originally an electro-motor of 55 horse-power, driven from 564 accumulators. It was of extraordinary lightness, weighing only 4410 pounds, and drove the screw at the rate of two thousand revolutions a minute, giving a speed of six knots an hour, its radius of action at this speed being thirty-five miles.
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