To find out the frequency of A.C. mains. Using an electric vibrator.

AC MainsMains is the general-purpose alternating current The different systems are primarily characterized by

their

1. Voltage

2. Frequency

Viberator

A vibrator is a mechanical device to generate vibrations. The vibration is often generated by an electric motor with an unbalanced mass on its driveshaft.

An AC motor has two parts.

An stationary stator having coils supplied with AC current to produce a rotating magnetic field,

and a rotor attached to the output shaft that is given a torque by the rotating field.

Unbalance motors are a synchronous AC Motors with pairs of centrifugal weights fitted to the ends of the motor shafts. The amplitude of the oscillation by the working unit can be adjusted by shifting the centrifugal weights when the motor is at a standstill.

The unbalance motors are also available in a special version for mains voltages up to 440V and for a mains frequency ranging from 50 Hz to 60 Hz.

VIBRATORY MOTORSVIBRATORY MOTORS are three phase

and consists of the following.Stators with special low loss magnetic core lamination for high efficiency and to achieve a low operative temperature of the motor itself. Winding impregnated with special, highly insulating epoxy resins. The drop by system ensures that all spaces between the winding coils are totally filled and therefore completely blocked

PRACTICAL USAGE OF

ELECTRIC VIBERATOR

1. Tattoo machine2. Electric vibrator therapy

3. Seismic Measurement-Systems4. Vibratory feeder5. Ultrasonic's

1. Tattoo machineA tattoo machine is a hand-held device

generally used to create a tattoo, a permanent marking of the skin with indelible ink. Modern tattoo machines use alternating electromagnetic coils to move a needle bar up and down, driving pigment into the skin. Tattoo artists generally use the term "machine", or even "iron", to refer to their equipment.

The technology used to make modern tattoo machines has come a long way, however. modern tattoo machines use electromagnets.

Most modern tattoo machines can control needle depth, speed, and force of application, which has allowed tattooing to become a very precise art form.

Patent demonstrates that the “tattoo device” has an ink chamber or “tube” and uses the single coil method for movement of the armature bar

2.Electric vibrator therapyElectric vibrator therapy has been used effectively by

a variety of health practitioners for over one hundred years.

In modern times, Cayce stated that vibrator therapy would bring about “rejuvenation of the nerve centers in such a way as to supply new life

Edgar Cayce told individuals that if they could not obtain osteopathic treatment where they lived, use of the electrically-driven vibrator would produce similar results. He said that the vibrator would help to produce coordination in the nervous systems and the circulatory systems

Were important effects of properly given osteopathic treatment. Given the difficulty in obtaining osteopathic manipulative therapy as compared to when Cayce was giving his readings, any contribution that electric vibrator therapy can make in this area is welcome. Understanding certain osteopathic concepts is helpful (and probably essential) to a full appreciation of why Edgar Cayce prescribed electric vibrator therapy. Thus, Part II begins with a fairly thorough discussion of specific osteopathic concepts that were also emphasized by Cayce. The important point to keep in mind is that these concepts can be translated almost directly into vibrator therapy. Instead of using the hands to simulate and inhibit nerve centers

Edgar Cayce also specifically recommended the electrically-driven vibrator as an adjunct to chiropractic. Unlike the osteopaths of that era, the chiropractors did not typically use general or coordinating treatments. Hence, electric vibrator therapy may also make a contribution to the treatments provided by modern chiropractors who, as a rule, are much more accessible than osteopathic physicians.

With the ball attachment, medium stroke, from the first cervical to the fourth or fifth dorsal, going on either side of the spine and placing the attachment between the transverse, processes of the vertebrae, leaving it at each point twenty-five to thirty seconds

Electric vibrator has been available in many

models.

Generally speaking, vibrators fall into two broad

classifications:

(1) the portable, hand-held version most often home use, and

(2)the commercial, stationary model that is so used in a physician’s office.

3.Seismic Measurement-Systems

Land Marine

Seismic System

Source Receiver

ComputerSeismic waves

Seismic vibratorA Seismic vibrator, commonly known by its trademark name Vibroseis, propagates energy signals into the Earth over an extended period of time as opposed to the near instantaneous energy provided by impulsive sources. The data recorded in this way must be correlated to convert the extended source signal into an impulse. The source signal using this method was originally generated by a servo-controlled hydraulic vibrator or shaker unit mounted on a mobile base unit, but electro-mechanical versions have also been developed.

Seismic source is a device that generates controlled seismic energy used to perform both reflection and refraction seismic surveys. A seismic source can be simple, such as dynamite.Seismic sources can provide single pulses or continuous sweeps of energy that generate seismic waves, which travel through a medium such as water or layers of rocks. Some of the waves then reflect and refract and is recorded by receivers, such as geophones.Seismic sources may be used to investigate shallow subsoil structure, for engineering site work, or deeper structures, usually in the search for petroleum or mineral deposits, or for scientific investigation. The returning signals from the sources are detected by geophones, laid in known locations relative to the position of the source.

3.Vibratory feederA vibratory feeder is a device that uses

vibration to “feed” material to a process or machine. Vibratory feeders use both vibration and gravity to move material.

Gravity is used to determine the direction, either down, or down and to a side, and then vibration is used to move the material.

A common vibratory feeder is cone shaped. The material bulk is delivered in an uncontrolled fashion into the top of the feeder and a controlled delivery of the material comes from the bottom of the feeder.

An example would be a pill bottling system. A large batch of pills is dumped into the top of the vibratory feeder. Gravity will pull the pills toward the bottom of the feeder where they can exit one at a time so that they can be counted.

Once the correct number is in the container, the feed is stopped until a new bottle is placed in position. In this way bottles can be filled automatically by machine with the correct number of pills in each bottle. The vibration in the vibratory feeder ensures that pills keep moving towards the exit into the bottle without becoming congested.

Another common use for a vibratory feeder is to deliver material at a steady rate from an irregular supply. In an automated cement mixing operation, a bulldozer could feed a vibratory feeder with irregular loads of raw material which is then delivered to the process at a steady rate by the feeder.

5.Ultrasonic'sThe term ultrasonic's applies to

sound waves that vibrate at a frequency higher than the frequency that can be heard by the human ear (or higher than about 20,000 hertz).

Sound is transmitted from one place to another by means of waves. The character of any wave can be described by identifying two related properties: its wavelength or its frequency (f).

The unit used to measure the frequency of any wave is the hertz (abbreviation: Hz). One hertz is defined as the passage of a single wave per second.

Production of ultrasonic waves The general principle involved in generating ultrasonic waves

is to cause some dense material to vibrate very rapidly. The vibrations produced by this material than cause air surrounding the material to begin vibrating with the same frequency. These vibrations then spread out in the form of ultrasonic waves.

In most applications, ultrasonic waves are generated by applying an electric current to a special kind of crystal known as a piezoelectric crystal. The crystal converts electrical energy into mechanical energy, which, in turn, causes the crystal to vibrate at a high frequency. In another technique, a magnetic field is applied to a crystal, causing it to emit ultrasonic waves.