Abstract: Disclosed is a clamped connection for clamping together separate parts, comprising a first part having a flange; a second part having an edge and an edge region adjacent to the edge. The edge region is deformable from a first condition in which the edge region is continuous and straight or has a constant radius of curvature along most of its length and a second condition in which the edge region has a continuously corrugated configuration including alternately deformed and undeformed partial edge region areas. The edge region includes a plurality of elongated apertures spaced from the edge and extending generally parallel thereto, and the deformed partial edge region areas are bounded on the side opposite to the edge by these apertures, whereas the undeformed partial edge region areas are located between said apertures. Also disclosed is a device for clamping together two parts to produce the disclosed connection.

Abstract: Disclosed is an elastomeric packing suitable for use in connections between a first part and second part wherein the packing is placed under a compressive force. The packing comprises a generally solid cross section having a recess therein for absorbing deformation of the packing due to the compressive force. Also disclosed is a fluid-tight sealed connection, e.g., in a heat exchanger, employing the disclosed packing.

Abstract: A fluid friction clutch especially for powering a rotary cooling fan for an internal combustion engine. The clutch has a driven part with a drive disc rotating in a drive chamber which is separated from a fluid reservoir chamber by a separating wall within the clutch housing. A passage in the separating wall can be opened and closed by a valve assembly which is actuated by a temperature-dependent element. The temperature-dependent element is an expansion element containing a substance which undergoes volume changes as a function of temperature. The expansion element is heated electrically by means of a PTC resistor under the control of a thermal switch which reacts to engine-related temperatures. When the power supply to the PTC heater is interrupted, the clutch engages and provides full cooling power.

Abstract: A cartridge for purifying exhaust gases from the internal combustion engine of an automotive vehicle or some other source comprising a catalyst support matrix wound of metal foil and a metal jacket housing said support matrix wherein a press fit exists between the exterior of the support matrix and the interior surface of the jacket and the support matrix and the jacket are welded or brazed together within the area of the press fit. Processes and apparatus for producing the cartridge of the invention are also disclosed.

Abstract: A temperature-controlled, fluid-friction clutch filled with a viscous fluid. The clutch has a drive disk mounted for rotation, the disk being flexible in the direction of the rotational axis. First and second clutch-driven plates have respective co-planar drive surfaces facing and spaced apart from surfaces of the drive disk, the space between the clutch-driven plates defining a fluid working space. A fluid storage space is also defined and an element is provided for pumping fluid from the working space into the storage space. A temperature-controlled valve controls flow of fluid between the working space and the storage space.

Abstract: A support matrix for a catalytic reactor for scrubbing exhaust gases in an internal combustion engine, composed of layers of alternating steel panels at least some of which are coated with a catalyzer and at least one of which is corrugated so as to form flow channels for the exhaust gases. In order to increase the turbulence of the flow in the channels of the matrix, the smooth panel and/or the corrugated panel is subdivided into narrow strips which lie adjacent to one another and are encountered sequentially by the inflowing exhaust gas. Furthermore, the exhaust gases which are divided into small streams may recombine between the strips and thus encounter renewed admixture. They are then redivided in the subsequent strip resulting in an overall intensive contact of each gas stream thread with a surface of the subsequent narrow strip, thereby substantially improving the catalytic efficiency.

Abstract: A fluid friction clutch, especially for driving the cooling fan of an internal combustion engine. The rotating clutch housing has a separating wall defining a fluid reservoir chamber and a drive chamber and the separating wall has a passage which is opened and closed by a valve. The valve is actuated by an electromagnet disposed substantially coaxially with the clutch. A permanent magnet is attached to the valve assembly coaxially with the electromagnet and of opposite polarity to the magnetic field polarity which occurs when the electromagnet is energized. Upon energization, the opposing magnetic fields repel the two magnets and cause the valve to close, thereby disengaging the clutch. When the electromagnetic is deenergized, a spring reopens the valve and permits full engagement of the clutch.

Abstract: A temperature dependent electronic control switch, especially suited for an automatic temperature control in vehicles, including one or more NTC resistors as sensors in a bridge circuit, an amplifier, to amplify the signals from the sensors, a solenoid for producing a variable magnetic field from signals received by the amplifier, an iron strip, an air nozzle connected to a vacuum, a servomotor connected between the air nozzle and the vacuum, and a control flap. The iron strip, moving in response to the magnetic field from the solenoid, obstructs an opening in the air nozzle, thereby changing the pressure felt by the servomotor and thereby causing the control flap of an air-conditioner or heater to move in a predetermined manner to mix air of different temperatures.

Abstract: A support matrix for a catalytic reactor for scrubbing exhaust gases in internal combustion engines, made of high-temperature resistant steel made up of alternating steel panels, at least one of which is corrugated, and at least one of which is provided with projections or depressions interlocking with at least one adjacent steel panel.