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Wall-mounted electromagnetic door holder securing a door in the open position. An electromagnetic door holder (electromagnetic door holder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop) is a simple electromechanical mechanism which can be used to hold a fire door or security door open until given a signal to release.
A magnetic switchable device (often called a magnetic base) is a magnetic fixture that uses one or more permanent magnets in a configuration that allows the external field to be turned on or off. They are used in many applications including optics , metalworking , lifting , and robotics, to attach items to metal surfaces in a secure but ...
The United States Armed Forces authorize certain medal and ribbon devices that may be worn if authorized on a defined set of United States military decorations and awards. [1] The devices vary between 3 ⁄ 16 inch to 13 ⁄ 32 inch in size and are usually attached to suspension and service ribbons of medals and to unit award ribbons. The ...
This is a partial list of awareness ribbons. The meaning behind an awareness ribbon depends on its colors and pattern. Since many advocacy groups have adopted ribbons as symbols of support or awareness, ribbons, particularly those of a single color, some colors may refer to more than one cause. Some causes may be represented by more than one ...
Magnetic bodysuit Allows the person wearing the bodysuit to fall down a lift shaft and be safely stopped at the bottom with the magnets attached to the walls. [97] Blofeld's eye A bionic eye that allows Blofeld to communicate remotely with others. It also has a video log of what it has seen. [98] Nanobot virus
After turning 40, founder Rick Hopper started using readers and began habitually losing, scratching and dropping his glasses. [1] In 2010, Hopper made prototypes using paperclips and magnets, solving the problem he had with trying to keep his glasses safe and secure. [1]
A ribbon microphone, also known as a ribbon velocity microphone, is a type of microphone that uses a thin aluminum, duraluminum or nanofilm of electrically conductive ribbon placed between the poles of a magnet to produce a voltage by electromagnetic induction. Ribbon microphones are typically bidirectional, meaning that they pick up sounds ...
A ribbon cable is a cable with many conducting wires running parallel to each other on the same flat plane. As a result, the cable is wide and flat. Its name comes from its resemblance to a piece of ribbon. [1] Ribbon cables are usually seen for internal peripherals in computers, such as hard drives, CD drives and floppy drives.