Abstract: Device for the surface cleaning of rotating machine elements such as the rotors of regenerative heat exchangers. A swinging cleaning arm is driven by an adjustable operating member to move across a rotor face through various angles, the extreme radially outer position of the cleaning arm being substantially constant, while its extreme inside positions, in various portions of its operating cycle, are variable. The operating member may be a fluid pressure motor; a control gear for the operating member contains a number of distribution sections arranged parallel in a distributing member. The distributing member is connected through connecting piping to a source of pressure fluid, and through further interconnecting piping is connected to the respective pressure spaces of respective operating members for swinging cleaning arms.

Abstract: A device for slipping a tube on the mandrel of a bending machine includes a support upon which a pair of slides are slidably mounted for movement in a direction parallel to the axis of the mandrel. A double arm lever is pivotally mounted to each slide, about axes parallel to the axis of the mandrel and a cylinder is mounted between the first ends of the levers. Gripping jaws are removably mounted to holders rotatably connected to the other ends of the levers, the gripping jaws being adapted to clamp a tube to be bent therebetween on opposite sides of the mandrel. A further cylinder is provided for moving the slides in a direction parallel to the axis of the mandrel.

Abstract: Apparatus for automatically welding pipe comprising a cross member positioned between first and second draw rolls, said guide is mounted on said cross member along with adjustable supports containing profile rolls for urging together pipes to be welded.