Abstract: A security seal for a collar used for tensioning springs in garage door assemblies. A collar typically includes at least one set screw projecting outwardly and at least two winding holes. The security seal of the invention includes a generally longitudinal piece of flexible material having two opposite ends, the opposite ends being provided with a locking system for locking the opposite ends together in a permanent fashion. The seal also has at least one hollow cup adapted to receive the at least one set screw and at least two solid cups, each of the cups being adapted to fit with a corresponding winding hole. The hollow cup and the at least two solid cups are disposed on the security seal so that when the seal is locked above the collar, the hollow cup and the solid cups are in registration with the at least one set screw and the at least two winding holes respectively.

Abstract: A cable failure device for a mobilizing a garage door in the event of a failure of one of the cables or one of the elements holding the cables is described. The cable failure device of the invention includes a support structure mounted on the cable operated door and includes a connection point onto which a tensioned cable is connected. A braking assembly is mounted onto the support structure and includes a casing mounted onto the support structure and a brake operable between a rest position and an operable position. The brake is movably mounted to the support structure and is located adjacent the outside of a fixed frame such as guide rails and is adapted to co-operate with a roller on the garage door so that a portion of the guide rail lies between the roller and the brake. A tension detector co-operating with the tension cable is provided for detecting a tension in the tension cable and an actuator is operatively connected to the tension detector and to the brake.