In dielectric currents there is no continued movement of electricity, but merely a limited displacement through or in the mass of aninsulator or dielectric.
A metal box has a metal strip B suspended from a block or insulator by means of a bit of sulphur or amber S, and to it is fastened a strip of gold-leaf L.
The path in which an electric current exists is called an electric circuit, and may consist wholly of a conducting body, or partly of a conductor and insulator or dielectric, or wholly of a dielectric.
It is considered one of the timbers likely to supply the place of black locust for insulator pins on telegraph poles.
Wood-pulp paper is extensively used as a cheap covering; it is a good insulator and under ordinary conditions makes a satisfactory covering.
The heating element is insulated from the body of the iron with sheets of mica, this being a material that makes an excellent insulator and is not materially affected by the heat to which it is subjected.
By placing metal plates on either side of a larger sheet of dielectric or insulator we can construct a condenser of relatively large capacity.
Since all electric charge consists in a state of strain or polarization of the dielectric, it is evident that the physical state and chemical composition of the insulator must be of great importance in determining electrical phenomena.
There is a close analogy between the variation of dielectric constant of an insulator with electric force frequency and that of the rigidity or stiffness of an elastic body with the frequency of applied mechanical stress.
The thinnest possible spherical shell of metal, such as a sphere of insulator coated with gold-leaf, behaves as a conductor for static charge just as if it were a sphere of solid metal.
We must, however, assume that the charge Q is so small that it does not sensibly disturb the original electric field, and that the dielectric constant of the insulator is unity.
This harmonizes with the fact that the real seat of the energy of electrification is the dielectric or insulator surrounding the charged conductor.
If the dielectric or separating insulator has a constant K, then the capacity becomes K times as great.
In the Leyden jar the insulator is a glass jar, while the "plates" are coatings of tinfoil, one inside and the other outside.
This is two conductors, generally in the form of two plates with aninsulator between them.
At any rate, I tried it, using lux metal as an insulator around the wire.
Made as it was, it offered protection nothing else could offer; it was almost a perfect insulator and was resistant to the attack of any chemical reagent.
The sectional view, Fig 2, shows the construction of the insulator and the manner of fastening it to the cross arm or bracket.
With this insulatorthese nests cannot cause a weather contact or earth; on the contrary, the nest rather improves the insulation.
This insulator can be used on an iron bracket and in connection with either iron or wooden posts, and is in every way more secure than the insulators in common use.
A rubber ring is placed between the upper end of the porcelain insulator and the cross arm, and another similar ring is placed between the head of the suspending screw and the bottom of the insulator.
The insulator represented in the annexed engraving was originally designed to meet the requirements of South American telegraph service, but it is equally well adapted to lines in other places.
It will be noticed that with this construction the insulator cannot be broken by the contraction of the screw or by the swelling of the cross-piece.
It was not until gutta-percha began to be used as an insulator for submarine lines that any substantial progress was made.
The aerial consisted of a single, number fourteen, hard drawn copper wire, insulated at each end by an earthenware insulator having two hooks embedded in it.
A similar insulator was provided at the other end of the wire, thus preventing its becoming grounded to the house or barn.
Then they drew the copper wire through the hook in the insulator until there was just a little slack, cut off the wire, and wound it securely.
A block of wood is used as an insulator under the jar.
The box can be cheaply molded out of polystyrene or styrofoam or other material, so long as it is a good insulator and capable of withstanding temperatures of around 110 degrees centigrade.
It is a curious fact that the kind of insulator between the charged conductors of a condenser affects its capacity.
The charged cloud is the upper charged plate, the earth beneath, charged by induction from the cloud, is the lower charged plate, while the air between is the insulator or dielectric as it is sometimes called.
A substance may be an insulator for currents of low potential, while at the same time it will conduct high potential currents.
Ebonite being an insulator (ยง 125), we say that I T, H P and B F B were insulated.
Insulating Aluminum Wire [306] Aluminum wire plunged hot into a cold solution of carbonate of soda becomes coated with a strong layer of oxide which forms an excellent insulator to electricity.
Thread the wire holding the zinc through the porcelain insulator of the carbon cylinder and also through the wire connector.
Moisture will allow some current to pass over the surface of any substance no matter how good an insulator it may otherwise be.
Borders must be suitably suspended, and if a wire rope is used same must be insulated by at least one strain insulator inserted at the border.
Must be hung from insulated hooks, or else there must be an insulator interposed between the motor and its support.
Must, when combined with ceiling fans, be hung from insulated hooks, or else there must be an insulator interposed between the motor and its support.
This defect is, however, minimized by crossing the wires about among themselves, so that any one line does not pass round the corresponding insulator on every pole.
Connections to the outside circuit are made inside the switch and a porcelain insulatoris slipped over the joint, thus providing a straight continuous connection from the line with maximum insulation.
At each end of the insulatorboard is an upright or lifting board which serves to lift the switching mechanism out of the tank.
It will be seen~ that the first few degrees through which the rotating insulator is moved have the effect of twisting the blade between the shoes of the contact, which breaks any seal through freezing, or corrosion.
The pantograph and contacts are supported on corrugated porcelain insulators on a hardwood base or insulator board.
The bodies named in the following series possess conducting power in different degrees in the order in which they stand, the most efficient conductor being first, and the most efficient insulator being last in the list.
The form may vary considerably, but in all cases it consists essentially of two insulated conductors, separated by an insulator and the working depends on the action of induction.
In electrical engineering, paper as an insulator is almost indispensable.
Pure air is also an insulator of electricity, which finds its paths through the air by means of the dust particles in suspension.
Paper, when dry, is an insulator to electricity, but when moist it becomes an excellent conductor.
I remember now Murphy said he put an insulator on this old house because there were no trees near to take the span.
On one side of the insulator the wire was stretched tightly, but the other side hung sagging.
In the same line of paradox it is observed that oil steadily improves in its insulating effect the higher the electrical pressure committed to its keeping; with air as an insulator the contrary is the fact.
With an ordinary land line, air serves as so good a non-conductor and insulator that as a rule cheap iron may be employed for the wire instead of expensive copper.
Down the line the Scouts reported, each to the effect that his wire and insulator were in prime condition.
Along the side of the house, a vine had wrapped its heavy creepers around a little segment of the wire between the insulator on the corner and the holes where the wire turned in to connect with the instrument.
The use of paper as an insulator for wires in telephone cables is due to its low specific inductive capacity.
Such devices consist of two conductors separated by an air space or other insulator and are variously known as lightning arresters, spark gaps, open-space cutouts, or air-gap arresters.
This forms an insulator which is not affected by heat or moisture.
Why is paper used as an insulator of telephone cables?
The insulator of an open-space arrester often is called the dielectric.
Two conductors separated by an insulator form a condenser.
An insulator used in this relation to two conducting surfaces is called the dielectric.
Only the conductor and the insulator are concerned in the electrical requirements of the cable.
Bound together with this or similar pitchy compounds, the conductor and the insulator form a solid core expanding and contracting together.
While the conductor is a substance through or over which electricity flows freely, the insulator will neither permit electricity to pass through its mass nor over its surface.
An insulator is a non-conducting substance, impervious, so to speak, to electricity.
This compound not only renders the strand solid, and impervious to water, but also acts as an adhesive connection between the copper conductor itself and the insulator with which it is to be coated.
In some particulars ordinary india rubber is a better insulator than gutta percha, but this substance is equally inferior to Hooper's material, &c.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "insulator" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: conductance; conduction; conductor; device; dielectric; generator; parts; relay
