Gerhard Fischer
Encyclopedia
Gerhard Fisher contributed to the development and popularity of the hand held metal detector
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his work with aircraft radio detection finders led him to the idea of a portable metal detectors. Fisher shared the idea with Albert Einstein
who correctly predicted the proliferation of hand held metal detector use.
for the sole purpose of locating a lead bullet in President James A. Garfield.
Metal detector
A metal detector is a device which responds to metal that may not be readily apparent.The simplest form of a metal detector consists of an oscillator producing an alternating current that passes through a coil producing an alternating magnetic field...
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Biography
Gerhard Fisher immigrated to the United States from Germany after studying electronics at the University of Dresden. While working as a Research Engineer in Los Angeles, CaliforniaLos Angeles, California
Los Angeles , with a population at the 2010 United States Census of 3,792,621, is the most populous city in California, USA and the second most populous in the United States, after New York City. It has an area of , and is located in Southern California...
his work with aircraft radio detection finders led him to the idea of a portable metal detectors. Fisher shared the idea with Albert Einstein
Albert Einstein
Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history...
who correctly predicted the proliferation of hand held metal detector use.
Inventions
Although the actual inventor of the hand-held metal detector is disputed, the hand-held metal detector was made in 1925 and was first patented by Dr. Gerhard Fisher in 1931. A metal detector had been invented some forty years earlier (1881) by Alexander Graham BellAlexander Graham Bell
Alexander Graham Bell was an eminent scientist, inventor, engineer and innovator who is credited with inventing the first practical telephone....
for the sole purpose of locating a lead bullet in President James A. Garfield.