vibrator


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vibrator

1. 
a. a device for producing a vibratory motion, such as one used in massage or in the distribution of wet concrete in moulds
b. such a device with a vibrating part or tip, used as a dildo
2. a device in which a vibrating conductor interrupts a circuit to produce a pulsating current from a steady current, usually so that the current can then be amplified or the voltage transformed
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Vibrator

 

in the broad sense, any system in which mechanical, electromagnetic, or other oscillations may be excited—for example, strings, tuning forks, pendulums, and oscillatory circuits.

In engineering, a vibrator is a vibration exciter, or a device for producing mechanical oscillations that is used independently or as a component of vibration machines and equipment. Vibrators are used to compact concrete mixtures in erecting buildings and structures and in the manufacture of sectional reinforced-concrete products; to mechanize the un-loading of bunkers; to compact earth and road surfaces; in vibration conveyors to transport free-flowing and lump materials; to dislodge castings from molding boxes; and to test designs, instruments, and apparatus for strength and stability. The most popular types are centrifugal vibrators, driven by a built-in electric motor, and internal centrifugal vibrators, in which vibrations are produced by the rotation of unbalanced elements. In electrical measurement technology, a vibrator is the moving part of such instruments as a vibration frequency meter.

In radio physics and radio engineering, a vibrator is a segment of a straight conductor, carrying alternating current, which radiates electromagnetic waves (for example, a Hertz dipole). A wire vibrator constitutes the simplest antenna or an element of a more complicated antenna.

REFERENCES

Gorelik, G. S. Kolebaniia i volny: Vvedenie v akustiku, radiofiziku i optiku, 2nd ed. Moscow, 1959.
Gol’dshtein, B. G., and L. P. Petrun’kin. Glubinnye vibratory dlia uplotneniia betona. Moscow, 1966.
Bykhovskii, I. I., and A. M. Vilenkin. Tsentrobezhnyi vibratsionnyi privod stroitel’nykh i dorozhnykh mashin. Moscow, 1968.

I. I. BYKHOVSKII and B. G. GOL’DSHTEIN

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

vibrator

[′vī‚brād·ər]
(electricity)
An electromechanical device used primarily to convert direct current to alternating current but also used as a synchronous rectifier; it contains a vibrating reed which has a set of contacts that alternately hit stationary contacts attached to the frame, reversing the direction of current flow; the reed is activated when a soft-iron slug at its tip is attracted to the pole piece of a driving coil.
(mechanical engineering)
An instrument which produces mechanical oscillations.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

vibrator

vibrator
An oscillating, power-operated machine used to agitate fresh concrete so as to eliminate gross voids including entrapped air (but not entrained air) and to produce intimate contact with form surfaces and embedded materials.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
If you are involved in the External Concrete Vibrator industry or intend to be, then this study will provide you comprehensive outlook.
These metrics include sound pressure level (SPL) and sound exposure level (SEL); together applicable to both impulsive (air gun) and transient (marine vibrator) acoustic noise types.
The Global Concrete Vibrator Industry report offers an extensive market breakdown on the basis of value, volume, CAGR, and Y-o-Y growth.
"We first discovered the Cougar vibrators about six years ago, when we received a new truck body equipped with a Cougar 2500," Stelljes continued.
However, interested buyers that don't currently own the Lovense Nora vibrator will be able to purchase both items in a bundle for $119.95. 
In the present study, we used a commercially available vibrator. The frequency of the vibration produced could not be measured.
To improve the vibrator force output towards a wide frequency range, one way is to design broadband sweeps using nonlinear sweep design techniques [12, 13].
The aim of this study is to discuss the [delta]-ferrite content and residual stress in welds made using two vibration modes: an eccentric circulating vibrator and a magnetic telescopic vibrator.
When she was single, she used a vibrator and I am sure that is to blame.
However, if the cross-sectional perimeter of the impedance cylinder is small as compared to its length and to the wavelength in the ambient medium (thin vibrator approximation) and if the slot width satisfy analogues conditions (narrow slot approximation), the solution of Equations (3) may be simplified [12].