Abstract: The border of a mattress or other such coil spring assembly is stabilized and reinforced using a continuous length of resilient rope which is wedged between convolutions of adjacent springs a plurality of turns about the perimeter of the coil spring assembly.

Abstract: A bedding foundation comprises a pair of elongated rigid metal side rails, a pair of elongated rigid metal end rails, the side and end rails being fixed to each other and arranged to form a rectangle. A plurality of elongated rigid metal cross rails are fixed to and extend across the rectangle in spaced parallel relationship to one another. The side and end rails are joined together by insertion of an end of a respective side and end rail into respective channels of a corner joint having two open-ended channels formed therein at right angles to each other. The foundation rails comprise a top portion with a pair of side portions depending from the top portion defining a generally U-shaped channel with the top portion. Foundation covering is preferably attached to the foundation by tacking it to the metal rail or to a penetrable material carried within the side and end rail channels, or by using an elongated wedge to fix the covering within these channels.

Abstract: A frame for a spring assembly has a plurality of parallel transverse cross rails with mounting slots that form openings through the top portion of the cross rail. Springs are firmly secured to the cross rails by inserting foot portions of the springs into the mounting slots by a simple press fit.

Abstract: A protection device for a waterbed protects the water bladder and water heater from damage due to overheating when a dangerous condition, such as an insufficient level of water within the bladder or an element of the waterbed surroundings interposed between the bladder and the water heater, arises. The protection device employs a detector in the form of two capacitance plates placed adjacent to the water bladder and connected to a circuit which is operative to prevent power from being supplied to the water heater upon detection of a dangerous condition. The capacitance of the detector plates varies with the level of the water within the bladder and with the presence of a surrounding element between the bladder and heater.