Abstract: A method for manufacturing a casing, for example, an exhaust casing, for a turbomachine. The method generally includes: (a) producing casing sectors, each casing sector having a hub sector, a ferrule sector, and at least one arm linking the hub and ferrule sectors, (b) arranging the casing sectors adjacently and circumferentially, such that each hub sector has longitudinal edges facing longitudinal edges of adjacent hub sectors, (c) welding the longitudinal edges facing the hub sectors, and (d) adding and welding at least a second part of the ferrule to the casing sectors.

Abstract: A casing is provided, for example, an exhaust casing for a turbomachine. The casing generally includes an inner hub having an axis of rotation and an outer annular ferrule extending around the hub, the ferrule configured to define, with the hub, an annular flow path for a gas stream. In some examples, the ferrule is rigidly connected to the hub by arms. The hub generally includes, at one longitudinal end, a scalloped annular flange comprising solid portions distributed at regular intervals about said axis and spaced apart from each other by hollow portions. The hub is produced by assembling several angular hub sectors arranged circumferentially end to end around the axis, each hub sector connected to an adjacent hub sector by a longitudinal weld bead that extends over substantially the entire axial extent of the hub and that is substantially aligned axially with a hollow portion of said flange.

Abstract: The invention relates to an assembly comprising: a turbomachine exhaust case (110) that includes an external sleeve and an internal sleeve inside the former, both sleeves extending concentrically about a turbomachine axis, and also includes a plurality of arms extending radially between the sleeves; and an annular part (130) that is centered about the axis, is mounted on one sleeve of the exhaust case, and is located downstream of the exhaust case in the direction in which the air flows inside the turbomachine; the assembly is characterized in that the annular part and the sleeve of the exhaust case on which the annular part is mounted each have a circumferential thread (131, 115), said threads cooperating with each other in order to allow the annular part to be screwed onto the sleeve of the exhaust case.

Abstract: A method for manufacturing a casing, for example, an exhaust casing, for a turbomachine. The method generally includes: (a) producing casing sectors, each casing sector having a hub sector, a ferrule sector, and at least one arm linking the hub and ferrule sectors, (b) arranging the casing sectors adjacently and circumferentially, such that each hub sector has longitudinal edges facing longitudinal edges of adjacent hub sectors, (c) welding the longitudinal edges facing the hub sectors, and (d) adding and welding at least a second part of the ferrule to the casing sectors.

Abstract: A casing is provided, for example, an exhaust casing for a turbomachine. The casing generally includes an inner hub having an axis of rotation and an outer annular ferrule extending around the hub, the ferrule configured to define, with the hub, an annular flow path for a gas stream. In some examples, the ferrule is rigidly connected to the hub by arms. The hub generally includes, at one longitudinal end, a scalloped annular flange comprising solid portions distributed at regular intervals about said axis and spaced apart from each other by hollow portions. The hub is produced by assembling several angular hub sectors arranged circumferentially end to end around the axis, each hub sector connected to an adjacent hub sector by a longitudinal weld bead that extends over substantially the entire axial extent of the hub and that is substantially aligned axially with a hollow portion of said flange.

Abstract: The invention relates to an assembly comprising: a turbomachine exhaust case (110) that includes an external sleeve and an internal sleeve inside the former, both sleeves extending concentrically about a turbomachine axis, and also includes a plurality of arms extending radially between the sleeves; and an annular part (130) that is centered about the axis, is mounted on one sleeve of the exhaust case, and is located downstream of the exhaust case in the direction in which the air flows inside the turbo-machine; the assembly is characterized in that the annular part and the sleeve of the exhaust case on which the annular part is mounted each have a circumferential thread (131, 115), said threads cooperating with each other in order to allow the annular part to be screwed onto the sleeve of the exhaust case.

Abstract: An energy-absorbing device for an automobile steering column having a body-tube housing the steering shaft. A support made as two parallel vertical members mountably fixed on a vehicle body mount the steering column axially between them. The body-tube has reinforcement members on two opposite sides. An attaching device compresses the reinforcement members in the support with a tightening non-rotatable bolt extending axially through the body-tube reinforcement members and the support members. A nut on one end of the bolt is tightened by an operator for establishing a determined level of a frictional force between the support and body tube.

Abstract: An energy-absorbing device disposed between two elements which are movable apart from each other in response to an externally applied force. The device has a wire coil winding having a plurality of turns at one end and a rectilinear length portion at another end extending away from a turn of the coil winding. One of the two elements has a support axis about which the coil winding turns are would axially thereof. A second of the two elements has an end of the rectilinear length portion of the wire secured thereto. The turns of the coil winding are deformable and unwind about the axis to absorb energy of a force applied in a direction parallel to the rectilinear relatively separating apart the two elements. The energy device is uable on automobile vehicle steering columns for absorbing impact forces.

Abstract: An energy-absorbing device for an automobile steering column adjustable in depth and/or inclination mounted on a support structure fixed to the vehicle body. The body-tube and steering shaft are clamped and locked in the support structure. A securing device with a rotatable elongate tightening element, such as a bolt or rod, and an operator for rotating the axis of the tightening element clamps the body-tube between coacting clamping elements and vertical sides of the support structure. Provision is made for depth adjustment and inclination of the steering column body-tube by slots in the clamping elements and support structure that allow positioning the tightening element axis at a selected position in accordance with a selected depth and inclination of the body-tube.

Abstract: An energy-absorbing device for an automobile steering column adjustable in depth and/or inclination mounted on a support structure fixed to the vehicle body. The body-tube and steering shaft are received in the support structure and clamped and locked therein by clamping elements coactive with the support structure. A locking device is provided with a rotatable elongate locking element to which is connected an operator for rotating the axis of the locking element in a direction for clamping the body-tube between coacting clamping elements and vertical sides of the support structure. The locking element is a bolt or rod having reverse pitch nuts on opposite ends and which tighten the sides of the support structure and clamping elements toward the body-tube to lock the body-tube in place when the locking element axis is rotated by the locking device operator.

Abstract: A process for thermally converting methane e.g., at 1,000.degree.-1,300.degree. C. into hydrocarbons with higher molecular weights, especially ethylene comprises circulating a gas containing methane in ceramic channels (11) grouped in rows which cover at least a part of the reactor (1) length, parallel to its axis. At the reaction temperature, the temperature variation is kept at less than 20.degree. C. The rows of channels form multiple plates (4) which are not adjacent to one another and which define tight spaces (17) in which are housed the electric heating (5, 22) means that heat the channel plates in a first zone (9) through successive, independent cross sections substantially perpendicular to the axis of the reactor and substantially parallel to the plane of the plates. Means for heating, servocontrol and modulation (7, 8) regulate the heating system. At the exit of the heating zone (9), the effluent is cooled in a second zone (10) equipped with cooling means and finally collected.