Who Invented the Metal Detector

Who Invented the Metal Detector

In 1874, Alexander Graham Bell first patented a metal detector. His device could find metal objects, including bullets, hidden inside people or buried underground. However, it wasn’t until the early 20th century that metal detectors began to be used for security purposes. 

The first walk-through metal detector was invented in 1935 by Albert Michelson and Harold Edgerton. 

In 1874, a man by the name of Alexander Graham Bell invented the metal detector. It was initially intended to help find bullets inside of people. However, it wasn’t until World War I that the metal detector became widely used for finding bombs and other metal objects.

Who Invented the Metal Detector
Who Invented the Metal Detector

History of the Metal Detector

It is hard to say when the first metal detector was invented. There are many different stories and claims about who invented the metal detector and when they did it. The most popular story is that Alexander Graham Bell, the famous telephone inventor, developed the first metal detector in 1881. 

He was supposedly looking for a way to find hidden metal objects inside of people without having to do surgery. However, there is no evidence that Bell built a working metal detector. Another story claims that Gerhard Fischer was the first to invent a working metal detector in 1934. 

Fischer was trying to develop a way to find ore deposits beneath the ground. However, his invention could only detect large pieces of metal and wasn’t very practical for finding smaller objects like coins or jewelry. The first modern metal detectors were developed in the early 1900s by companies such as General Electric and Westinghouse. 

These detectors were used during World War I to locate land mines buried beneath the ground. After the war, companies began selling metal detectors for hobbyists and treasure hunters. Today, many different types of metal detectors are available on the market, each designed for specific uses, such as detecting gold nuggets or finding lost keys.

How Did the First Metal Detector Work

The first metal detectors were simple devices. They consisted of an electromagnet that was connected to a hand-held receiver. When the electromagnet was turned on, it would create a magnetic field. 

If there were any metal in the area, it would disrupt the magnetic field and the receiver would pick up the disturbance. While these early metal detectors could have been more accurate, they could still find things like coins and other small pieces of metal. It wasn’t until later that more sophisticated models that could be used to find larger objects like weapons or explosives were developed.

What Did the First Metal Detector Look Like

The first metal detector was created in 1874 by Alexander Graham Bell. The device called an induction balance, used electricity to detect metal. The device worked by passing an electric current through a coil of wire. 

When the current came into contact with a piece of metal, it would create a magnetic field to deflect the current. This would cause the coil to produce a sound that could be heard through headphones. The device could have been more practical and could only detect large pieces of metal.

Metal Detector Principle

Most metal detectors work on the principle of inductance. Inductance is the ability of a coil of wire to store electrical energy in a magnetic field when current flows through it. The strength of the magnetic field depends on the number of turns in the coil and the amount of current flowing through it. 

When a metal object, such as a coin, is brought near the coil, it disturbs the magnetic field and causes a change in inductance. This change can be detected and used to operate an audio or visual signal that alerts the user to the presence of metal. Metal detectors usually have two or more coils tuned to different frequencies. 

This allows them to discriminate between different types of metals and ignore other materials, such as saltwater or minerals in the ground, that can also cause changes in inductance.

Who is the Founder of Metal Detector?

The first metal detector was invented in 1881 by Alexander Graham Bell. He used it to find a bullet lodged in the chest of President James Garfield. The technology has been used for many purposes since then, including security, archaeology, and treasure hunting.

Where was the First Metal Detector Invented?

The first metal detector was invented in 1881 by Alexander Graham Bell. He was experimenting with ways to detect metal objects underground and came up with the idea of using a metal rod as a detecting device. However, it was not until 1887 that another inventor, Robert Gainer, patented the first accurate metal detector.

When was the Mine Detector Invented?

The first recorded use of a mine detector was in November 1916, by the British army during World War I. However, the device was only perfected after the war. The modern mine detector was invented in 1924 by Polish engineer Jozef Kosacki.

How Did Bell Invent the Metal Detector?

Metal detectors are devices that can detect the presence of metal in an area. They are used in various settings, including security, construction, and mining. Metal detectors work by detecting the electromagnetic fields produced by metal objects. 

Bell invented the metal detector in 1881. He was inspired by an incident where he found a piece of metal in his food while dining at a restaurant. Bell set out to develop a device that could detect metal objects without coming into contact with them. 

His prototype was based on the principles of electromagnetism. It consisted of two coils of wire, one connected to a battery and the other to a hand-held wand. When metallic objects were brought close to the wand, they would disrupt the flow of electricity between the two coils and cause a sound to be emitted from the wand. 

Bell continued to refine his invention over the next few years. In 1887, he patented an improved version that could be used to locate bullets and other small metallic objects inside patients’ bodies. This version became known as the “bellphone.”


The metal detector was invented by Alexander Graham Bell in 1881. He was trying to find a way to detect metals underground and came up with the idea of using a device that could detect vibrations in the ground. For more information, you can check Wikipedia.


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