Abstract: A counterbalance spring for garage doors of the sectional type which slide upward and over a horizontal track is located above and parallel to the track. The spring is a coiled spring which, after a period of time may fracture under tension and broken parts consequently may be thrown about at some peril. To contain the broken parts a rod extends through the coiled spring, is fastened to the building structure at both ends, and the pulley connected to one end of the spring is mounted on a carrier which slides on and is guided by the rod. The initial impact resulting from fracture of the spring while under tension is absorbed by a deformation of the rod serving as a cushion.

Abstract: An attachment device for the quick and easy attachment of a counterbalance coil spring to an appropriate bracket features a single section of rod bent to provide a shoulder at one end for connection to the bracket and a second shoulder at the other end for the counterbalance spring, the ends being equipped in a manner to permit application of an interlocking retention piece over end sections of the bend rod. In some forms of the invention fasteners applicable to the very endmost part of the rod are employed to lock the retention piece in place.

Abstract: A retainer to restrain pieces of a coil spring from scattering when the spring breaks under tension makes use of two mutually slidable elements located within the interior of the coil spring. Adjacent ends of the elements have a sliding engagement with each other and include a yieldable cushion inherent in the structure to absorb the impact when the spring breaks. The respective opposite ends of the elements are attached, one to the spring keeper at one end of the spring and the other to the spring keeper at the opposite end of the spring.