Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: June 17, 2025
In the case of electro-motors these conditions are changed. In the first place, we assume that the current put through the coils of the magnets is continuous; and secondly, we can count upon the momentum of the armature, as well as the momentum of the driven object, to assist us over slight irregularities.
The machine represented in the annexed engravings consists of a movable inductor, whose alternate poles pass in front of an armature composed of a double number of oblong and flat bobbins, that are affixed to a circle firmly connected with the frame. There is a similar circle on each side of the inductor.
They are curious on account of their careful elaboration, and furnish important information with respect to Sassanian dress and armature, but they are poor in design, being heavy, awkward, and ungainly.
Whether there is a true time lag, or whether the retardation is due to eddy currents circulating in minute paths, must remain an open question, but the fact is that a coil wound upon an iron core and traversed by an alternating current creates a moving field of force, capable of setting an armature in rotation.
The vibrator consists of a stiff, flat spring fixed at one end to the box or base while it carries a piece of soft iron called an armature on its free end and this sets close to one end of the soft iron core. Insulated from this spring is a standard that carries an adjusting screw on the small end of which is a platinum point and this makes contact with a small platinum disk fixed to the spring.
Before the end of March he invented the clock-work alarm, in which an electro-magnet attracted an armature of soft iron, and thus withdrew a detent, allowing the works to strike the alarm. This idea was suggested to him on March 17, 1836, while reading Mrs. Mary Somerville's 'Connexion of the Physical Sciences, in travelling from Heidelberg to Frankfort.
As it vibrated with the current produced by the iron on the vibrating membrane in the transmitter acting as an armature, transmitter and receiver vibrated in unison and so the same sound was given off by the receiver and made audible to the human ear as was thrown against the membrane of the transmitter by the voice.
"He has, Lawrence; but I will not have my friends spoken of in that way." "Your friends indeed! What do you intend to do about it?" Meanwhile her hand, persistently kept in her pocket, nervously moved the electric armature, and a sudden twinge of pain startled her. Her finger, caught between the wires, felt the shock of a returning current. Suddenly the pain flashed again, and she understood it.
Raub and Simpson! Was it possible this was their work? Was it possible they had cut the wires? Quickly he made a test which would show whether the breaks were near him. Adjusting the relay-magnets near the armature, he clicked the key. There was not the faintest response. Switching the instruments to the southern end of the wire, he repeated the test, with the same result.
The locomotive would be started with these resistance-boxes in circuit, and after reaching full speed the operator could plug the various boxes out of circuit, and in that way increase the speed." To stop, the armature circuit was opened by the main switch and the brake applied.
Word Of The Day
Others Looking