| 摘要 |
In the door stop, the arm which is pivotally mounted on the door has the shape of a flat strip against the respective edges of which strip are applied under elastically yieldable pressure two rollers. The first roller, which, in the open position of the door, is engaged in a stop notch, is fixed in position, whereas the other roller is rotatably mounted on a transverse portion of a stirrup which connects adjacent end portions of two helical windings of a torsion spring. Each roller comprises two rings which are fitted one inside the other and have a sliding contact between each other, with the pins on which they are mounted, with the arm and with inner faces of a bracket carrying the pins. |
