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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 steel plate, often mounted on a ball joint or swivel joint, is attached to the door so that it can contact the electromagnet when the door is fully opened. An electric current ...
Inductrack is a passive, fail-safe electrodynamic magnetic levitation system, using only unpowered loops of wire in the track and permanent magnets (arranged into Halbach arrays) on the vehicle to achieve magnetic levitation. The track can be in one of two configurations, a "ladder track" and a "laminated track". The ladder track is made of ...
In order to provide the shear magnetic lock with the appropriate holding force, then two pins lock the armature onto the magnet itself, and ensure that the magnet locks into place. An improved "shear" electromagnetic lock was patented on May 2, 1989, by Arthur, Richard and David Geringer of Security Door Controls, an access control hardware ...
Door closers that are mounted in the floor directly under the pivot point beneath a decor plate are referred to as floor springs and come in two variations, single action for doors opening one way (right and left hand) and double action for doors that open inward and outward, both types can either be none hold open (NHO) or hold open (HO).
This is done by a pair of track magnets, one on either side of the neutral overhead wire and spaced 45 metres (148 feet) apart. The two magnets are mounted with their polarities reversed in relation to each other and they activate a magnetic relay located behind the cowcatcher of the locomotive to do the switching off and restarting.
The technology works by having the state of a track mounted shoe read by a receiver mounted to a truck on the leading locomotive or car. In the standard implementation the shoe is mounted to the ties a few inches outside the right hand running rail, although in theory the shoe could be mounted anywhere on the ties. [ 1 ]
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