Telescopic door closing spring - has shroud sleeve extended through centre cylinder connected to door and outer parts to frame

摘要

The spiral spring is shrouded in a sleeve which extends through the three parts of the external cylinder. The middle one of these three parts is fastened to the door and the outer two to the door frame, or vice versa. One end of the spring is fastened to the sleeve, the other by an adjustable end stop to one of the outer parts of the external cylinder. The width of the adjustable end stop is less than the inner dia. of the external cylinder. The end stop preferably fits inside the cylinder and, like the one at the other end, it has a slot which takes the loop that forms the end of the spiral spring. The spring is fastened to the end stop by a peg.