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  2. Gerhard Fischer (inventor) - Wikipedia

    en.wikipedia.org/wiki/Gerhard_Fischer_(inventor)

    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.

  3. Weapon screening detectors to go ‘live’ Friday at Wichita ...

    www.aol.com/metal-detectors-being-installed...

    Students will be required to walk through the detector single file and will not have to remove their backpacks or gym bags. Weapon screening detectors to go ‘live’ Friday at Wichita high ...

  4. Counter-IED equipment - Wikipedia

    en.wikipedia.org/wiki/Counter-IED_equipment

    Non-linear Junction Detector (NLJD): A portable NLJD allows the operator to search voids and areas where they are unable to gain physical or visual access, in order to detect electronic components and determine if the area is free from IEDs. Laser IED Detection: Scientists are learning to adapt lasers to detect, or defeat, IEDs. [19]

  5. Metal detector - Wikipedia

    en.wikipedia.org/wiki/Metal_detector

    The most common type of metal detector is a hand-held metal detector or coil-based detectors using oval-shaped disks with built-in copper coils. The search coil works as sensing probe and must be moved over the ground to detect potential metal targets buried underground.

  6. Wichita high school students will have to pass through metal ...

    www.aol.com/wichita-high-school-students-pass...

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