Abstract: The vapor generator is formed with a flue of rectangular cross section and a funnel of four trapezoidal walls which define a rectangular opening. The tubes of the funnel and flue extend helically and connect each to the other. The funnel tubes in the larger trapezoidal walls have transition portions which are disposed at greater angles to form a smooth transition into the funnel tubes of the smaller trapezoidal walls.

Abstract: A combustion chamber is subdivided vertically into layers with each layer having sets of burners disposed in angular spaced apart relation. In addition, the sets of burners are offset from one layer to another and all of the jet axes of the burners are directed in the same direction tangentially of a vertically disposed imaginary cylinder within the combustion chamber. The jets create a vortex flame within the combustion chamber.

Abstract: The heat exchanger is constructed with a vertical gas flue and a hopper at the bottom end of the flue. The gas flue is shaped to have more than four sides. The hopper walls meet the wall-forming tubes of the gas flue around a boundary edge which extends over the entire periphery of the gas flue. All of the wall-forming tubes of the gas flue are bent at the boundary edge while the tubes in the walls of the hopper extend in parallel relationship to one another.

Abstract: The steam generator is comprised of a pair of vertical flues which are connected by a transverse flue. The support structure uses bearing systems to suspend the vertical flues in a region immediately below the transverse flue. The bearing systems are also mounted on a support structure immediately below the transverse flue.The support arrangement eliminates the need for any bearer tubes passing from the back wall of the first vertical flue and the front wall of the second vertical flue through the transverse flue.

Abstract: The steam generator has a combustion chamber which merges at the top into a combustion gas flue having walls in the form of evaporator tubes. A superheater tube bank is suspended in the combustion gas flue in front of the evaporator tubes. The superheater tubes are connected together in pairs to a common inlet at a lower end which passes through the evaporator tube banks while the evaporator tubes of the combustion chamber are connected in pairs to a single evaporator tube within the flue.Retaining elements are provided to form a moving connection between the superheater tubes and the evaporator tube and provision is made to compensate for differences in expansion between the superheater tubes and the evaporator tubes at the top end of the superheater tube bank.

Abstract: The combustion chamber wall consists of tubes which are inclined to the horizontal and which are welded to one another in a gas-tight relationship via webs. Pairs of vertical tension strips bear against the outside of the combustion chamber wall. Each pair is connected to the wall tubes via a plurality of sheet-metal strips distributed over the height of the combustion chamber wall. The sheet-metal strips are disposed perpendicularly to the combustion chamber wall plane and are cut out in the form of a comb at the edge connected to the wall tubes.

Abstract: A mass which projects from a displaceable member is supported by a lever system on a stationary frame such that the bending stresses caused by the mass on the displaceable member are reduced. The lever system uses a pair of levers which are hinged to the frame, to each other and to the displacable member and mass respectively. The lever arms are arranged such that the amount of vertical movement of the displaceable member is essentially equal at the projecting end of the mass.