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Metal detector

en.wikipedia.org/wiki/Metal_detector

A metal detector is an electronic instrument which detects the presence of metal nearby. Metal .... Another development was the invention of detectors which could cancel out the effect of mineraliza...

The History of the Metal Detector | MetalDetector.com

www.metaldetector.com/learn/metal-detector-history/history-of-the-metal-detector

Other factors that have greatly influenced the development of metal detectors as we know them today include transistors - invented in 1947 by John Bardeen, ...

When was the metal detector invented? | Reference.com

www.reference.com/history/metal-detector-invented-88f0148944441ea9

The first metal detector was invented in 1881 by Alexander Graham Bell. He attempted to use the device to locate a bullet in the chest of U.S. President James  ...

www.ask.com/youtube?q=Who Invented The Metal Detector&v=CEWgZ273YJs
Nov 30, 2010 ... History of Invention of Metal Detector Metal detector is an electronic device which allows to detect metal objects in neutral or low-conductive ...

metal detectors - Kansas State University

web.phys.ksu.edu/mmmm/student/garfield.pdf

recent invention, the telephone, he thought that he could hear that change. .... In effect Alexander Graham Bell had invented the metal detector. The ideas which ...

Walk-Through Metal Detectors Were Invented to Catch Thieving ...

paleofuture.gizmodo.com/walk-through-metal-detectors-were-invented-to-catch-thi-520336775

Jun 20, 2013 ... Today we walk through metal detectors to get into courthouses, airports, and even concert venues. But back in the 1920s the first walk-through ...

History of the metal Detector. | Metal Detector SA

metaldetectorsa.co.za/frequently-asked-questions/hobby-metal-detectors/history-of-the-metal-detector/

Alexander Graham Bell invented the world's first metal detector in 1881. Why did he do this? To retrieve a bullet from then president James Garfield who lay ...

How metal detectors work - Explain that Stuff

www.explainthatstuff.com/metaldetectors.html

Jul 15, 2016 ... Artwork: The modern-style, compact metal detector was invented by Charles Garrett in the early 1970s. You can clearly see the two coils (which ...

The Three Major Inventions of Garfield's Assassination | Presidential ...

featherfoster.wordpress.com/2014/09/16/the-three-major-inventions-of-garfields-assassination/

Sep 16, 2014 ... Bell had invented a metal detector that he claimed might help find the elusive bullet. He was immediately invited to the White House. Although ...

History of Metal Detecting - White's Electronics

www.whiteselectronics.com/the-hobby/knowledge-base/history

In 1925, Gerhard Fisher was granted the first patent for a metal detector. ... His invention quickly went international and was used in Antarctic exploration and the ...

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The History and Use of Metal Detectors - Inventors - About.com

inventors.about.com

In 1881, Alexander Graham Bell invented the first metal detector. As President James Garfield lay dying of an assassin's bullet, Alexander Graham Bell hurriedly  ...

Alexander Graham Bell's metal detector - SciTechAntiques.com

www.scitechantiques.com

Metal Detector Props From The Discovery Channel ... Below are photos and descriptions of working models of Alexander Graham Bell's metal detectors, their  ...

How Metal Detectors Invented and What They Are Used for | Patch

patch.com

Jul 20, 2014 ... However, at the very beginning, there were some incredible stories about the invention of metal detectors. A summer day in 1881, one bullet ...