Abstract: A tension spring arrangement in which a coil-type tension spring has a plurality of turns and two off-center hook portions joining, respectively, the two turns at the opposite ends of the spring body. When the spring is in its non-installed state, the inclination of the hook portions with respect to the longitudinal axis of the spring is different from the inclination of the hook portions when the spring is in its installed state, the difference in inclination being such that when the spring is in its installed state, there is applied to the spring body a resultant bending moment which, in magnitude and direction, is at least approximately equal to the bending moment which would be applied to the spring body were the hook portions arranged not off-center but in alignment with the longitudinal axis of the spring.

Abstract: A device for changing the amount of linear movement in a linkage system, preferably for reducing the movement, consists of a hollow body into opposite ends of which a tube and a co-axial rod extend. Attached to the inner end of the rod is a pair of flanges which extend through slots in the tube. A compression spring is lodged in the body between the flanges and an end of the body and a further compression spring is lodged between the flanges and an abutment on the tube at the opposite end of the body. Preferably, the rod passes with clearance through a sleeve forming an extension of the body and a viscous material is provided in the sleeve around the rod to act as a damper to short term movements of the rod.