Abstract: A locking device for safety belts in vehicles of the type in which a strap of the seat belt is automatically retracted into a housing when the seat belt is not used. The device comprises at least two parallel, rotatably mounted rollers and the strap runs between and around the rollers. One roller is undisplaceable and the other roller is movable in an arcuate path between a free position and a locking position. The movable roller is normally maintained in the free position, in which the rollers can rotate, so that the strap can be extended. During rapid extension of the strap, the movable roller is moved to a locking position, in which the rollers can not rotate, so that the strap can not be further extended.

Abstract: A method for controlled separation of substances by heating, e.g. for removing paint or other coatings on scrap metal, includes heating in an oven chamber the material from which one or more substances are to be separated to a temperature sufficiently high to provide evaporation of the substances to be separated, by means of a circulating gas. The gas is circulated from the oven chamber to a combustion chamber, where it is burned, and then to a large extent recirculated back to the oven chamber. The burning in the combustion chamber is intended to facilitate the destruction or collection of harmful substances emitted in the oven chamber and generates the heat necessary for providing and sustaining the desired temperature in the oven chamber. Controlling the recirculating gas stream will provide close control of the separation process in the oven chamber and, thus, facilitate the cleaning of the gas quantity diverted from the combustion chamber to the atmosphere.