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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 Bell for the sole purpose of locating a lead bullet in President James A. Garfield.
A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector consists of a control box, an adjustable shaft [dubious – discuss], and a variable-shaped pickup coil. When the coil nears metal, the control box ...
Rapiscan Metor walk-through metal detectors stem originally from Outokumpu, which was one of the first companies to develop walk-through metal detectors for security screening. The systems were originally adapted from metal detectors used in the mining industry to locate parts of broken drill bits in minerals on a conveyor belt. [5]
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Central Visual and Performing Arts High School uses the code word "Miles Davis is in the building" to alert students and staff of an active shooter in the building. [3]The school also has several metal detectors, and seven security guards were present on the day of the shooting.
Mettler-Toledo International Inc. is an American multinational supplier of precision instruments and services. The company focuses on innovation and quality across laboratory, industrial, product inspection, and food retailing applications.
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