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A simple electromagnetic door holder consists of a strong electromagnet, usually attached to a wall or mounted in a floor pedestal enclosure, next to the door it controls. The mechanism may be mounted near the floor, at the upper corner of the open door, or at any convenient height along the latch edge (away from the hinged edge).
A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems. [2]
Quick to operate: Magnetic locks unlock instantly when the power is cut, allowing for quick release in comparison to other locks; Sturdy: Magnetic locks may also suffer less damage from multiple blows than do conventional locks. If a magnetic lock is forced open with a crowbar, it will often do little or no damage to the door or lock.
The Niagara Whirlpool is a natural whirlpool within the Niagara River located along the Canada–U.S. border between New York and Ontario. The whirlpool is in the Niagara Gorge (a gorge on that border), downstream from Niagara Falls (a group of three waterfalls on that border). The whirlpool's greatest depth is 125 feet (38 m). [1]
The Portable Door is a 2023 Australian fantasy adventure comedy film directed by Jeffrey Walker and starring Patrick Gibson, Sophie Wilde, Sam Neill, and Christoph Waltz. The screenplay by Leon Ford is based on the 2003 novel of the same name, the first in Tom Holt 's J.W. Wells & Co. series.