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A doorstop (also door stopper, door stop or door wedge) is an object or device used to hold a door open or closed, or to prevent a door from opening too widely. The same word is used to refer to a thin slat built inside a door frame to prevent a door from swinging through when closed.
The vehicles have two pairs of double-leaf, sliding-plug doors on both sides (with a clearance of 1.300 mm). [3] Each door is equipped with a retractable step to aid boarding at platforms lower than 800 mm above the track, the level at which the medium-floor area is located, where all the doors are positioned. [3]
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).
Some cars from about 1900 to through 1966 used retractable semaphores called trafficators rather than flashing lights. They were commonly mounted high up behind the front doors and swung out to a horizontal position. They were fragile and could be easily broken off, and also had a tendency to stick in the closed or open position.
Scissor doors that also move outward while rotating are called dihedral synchro-helix actuation doors. Sliding – mounted to or suspended from a track, and open by sliding horizontally alongside or into the vehicle sidewall, or open by sliding vertically into the vehicle sidewall or floor. Sliding doors that disappear into the floor ...
Floor-mounted police lock schematic. The first is floor-mounted. It consists of a steel bar running on at a roughly 45° angle from the center of the door to the floor, on the inside of the area to be secured. At each end of the bar are slots or fixtures (one in the door, one in the floor) into which the steel bar is secured.