The oldest form of quenching device, which forms the basis for all further improvements, is shown in the figure. In an installation of this kind a framework "a" is erected and fastened to the ovens. This supports a longitudinal girder b, on the bottom flange of which moves the trolley c that supports the quenching apparatus on a swivel and two chains, in such a manner that it can be easily conveyed to any of the ovens of the battery which may be ready for pressing.