To follow a helical or spiral course; to be in the form of a helix.
The length, measured along the axis, of a complete turn of the thread of a screw, or of the helical lines of the blades of a screw propeller.
Rick showed him the helicalcoil at the end of the probe.
My hunch says that Mr. Lazada is crooked as a helical coil.
At the tip of the probe was the sensing element which looked very much like the Geiger tube of a radiation detector surrounded by a helical coil.
When the pilot valve opens, the pressure beneath the piston is relieved and it is seated by the helical spring above.
The centrifugal strain due to this is balanced byhelical springs.
But, amongst all other ways to this purpose, that invention of Archimedes is incomparably the best, which is usually called Cochlea, or the Water Screw; being framed by the helical revolution of a cavity about a cylinder.
I think he slipped up when he commented on that helical what's-it, then covered his slip by pretending he'd only leafed through the texts and picked up a bit here and there.
The helical construction of the filament made it possible to confine the filament of a high-intensity tungsten lamp in a small space and for the first time a high degree of control of the light of street lamps was possible.
However, a practical filament must have sufficient resistance to be used safely on lighting circuits already established and, therefore, the large diameter and high resistance were obtained by making a helical coil of a fine wire.
In fact, the gas-filled tungsten lamp may be thought of as an ordinary lamp with its long filament made into a short helical coil and the bulb filled with nitrogen or argon gas.
Is the half-fluid resin unsuitable for the wide-spanned roofs which would have to be constructed when the diameter of the helical passage exceeded certain limits?
Here things happen as in a first-class reed, for the helical curve in no way affects the method of structure employed for a rectilinear series of cells.
In each slot slides a stepped jaw, the under side of which is scored with concentric grooves engaging with a helical scroll turned by a key and worm gear acting on its circumference.
The carriage is supported on helical springs and solid steel wheels.
The carriage is provided with strong oak buffers, planks, and spring buffers; the drawbars also have helical compression springs of the usual type.
A is the cylindric leather bellows, pressed down by a helical spring, and worked by means of the handle at B, which moves the horizontal shaft C, with its two attached semicircular levers and chains.
Passing through it to the other end, Prestonby unlocked a door, and they went down a short hall, to where ten or fifteen boys and girls had just gotten off a helical escalator and were queued up at a door at the other end.
Then he came to the building on which he had parked his 'copter, and left the beltway, entering and riding up to the landing stage on the helical escalator.
A powerful helical spring, turned out of a solid bar of steel, is compressed between the inside end of the piston and the upper end of the butt.
As the cylinder revolves, the recorder is shifted continuously along by a leading screw having one hundred or more threads to the inch cut on it, so that it traces a continuous helical groove from one end of the wax cylinder to the other.
Another type of fabric springs consists of steel bands fastened to the ends of the frame byhelical springs and to each other by short helical cross ties or wire locks.
They consist of a flat layer of crossed or meshed wires which are fastened to the frame with helical springs.
METAL-TIED UNITS In the metal-tied units the springs are held together by helical (small spiral) springs or metal clips.
Each coil usually is held to its neighbor by four small helical springs.
In a later edition, however, an endless band of sensitised paper is employed, and the lamp is screened from the mirror by a horizontal mantle in which is cut a helical slit making one complete turn of the cylinder in its length.
An adjustable helical spring~ is attached to the other end of the arm to assist the magnetic pull of the coil in balancing the plunger and also for adjustment.
Taps are provided on the resistance in series with the relay, and finer adjustment can be obtained by means of the helical spring on the right hand end of the balance arm.
Valve springs of the helical coil type are generally used, though torsion or "scissors" springs and laminated or single-leaf springs are also utilized in special applications.
A small helical spur pinion at the other end of this countershaft receives its motion from a larger gear turned by the hand crank.
The gear on this starting crank and the one on the thrust plate with which it meshes are cut with helical teeth of such hand that the starting pinion is thrown out of mesh as soon as the engine picks up its cycle.
This has its cartridges arranged in a tube below and parallel with the barrel, and they are fed in a column to the rear by a helical spring as fast as they are used up at the breech.
The coil b b is connected by a thread k to the siphon, and pulls the siphon in one direction, while the siphon is pulled in the opposite direction by a helical spring attached to an arm on the siphon axis l.
The translation of a body in helical motion is called its advance.
To cause a body to move in this manner it is usually made of a helical or screw-like figure, and moves in a guide of a corresponding figure.
Hooke's wheels with oblique or helical teeth are in fact screws of many threads, and of large diameters as compared with their lengths.
The figure of a screw is that of a convex or concave cylinder, with one or more helical projections, called threads, winding round it.
Helical motion and screws adapted to it are said to be right- or left-handed according to the appearance presented by the rotation to an observer looking towards the direction of the translation.
The pitch of a screw is the distance, measured parallel to its axis, between two successive turns of the same thread or helical projection.
In order to make the operation of this machine better understood, we will conclude our description by some practical examples of the calculations required in making helical teeth.
Should the supply voltage fail, either temporarily or permanently, E will release a, and L will fly off under the tension of a helicalspring coiled round s.
A helical spring coiled around the lever pivot P, and acting on the lever A, tends to keep it in the off position against the stop S.
Ampere and Arago then seem to have experimented together and magnetized a steel needle wrapped in paper which was enclosed in a helical wire conveying a current.
C D' represents the helical path of the extremity of the blade B, and O E F H K is that of the blade A.
