Abstract:
A heat exchanger of the spiral-coil type in which, around a core tube, a sheet of thermally conductive material, e.g. metal, is coiled in a spiral to define passages between the turns of the spiral traversed by fluids to be subjected to heat exchange. According to the invention, neighboring metal sheets define flow passages between them and are sealed along the faces of the sheets and along the longitudinal edges over spaced-apart units of length so that the sections between the sheets are alternately open and closed at the longitudinal edges. The open passages at the longitudinal edges can communicate with a hood through which the fluid is distributed to or removed from a respective passage.
Abstract:
The interior chamber of a tanker is subdivided into at least two compartments by a partition wall that is formed of Invar steel and is at the same temperature as the liquids in the two compartments. The partition is rigidly secured to the bottom wall of the tanker and generally planar, with limited ability to expand and contract in the direction of its plane. This is effected by forming the partition of one or more upright tubes of round or square cross section interconnected, if desired, by webs lying in or at an angle to the plane. It is also possible to connect the outer edge of the partition to the side wall of the tanker by means of a panel tightly secured in a frame but slidable relative thereto to allow limited expansion and contraction.
Abstract:
An arrangement for the transport of low-temperature fluids, especially liquefied gases such as natural gas (i.e. methane) in a vehicle such as a sea-going vessel having a thermally insulated cargo compartment. The liquefied-gas storage container, composed of metal, has at least one side extending generally parallel to the wall of the compartment and is secured thereto against displacement perpendicular to this wall with at least one degree of freedom of movement relative to this wall in a direction parallel thereto. The storage container is constituted of a multiplicity of individual upright receptacles fastened together at theri outer peripheries at upper and lower portions into at least one group of receptacles capable of thermal expansion and contraction, the storage container being anchored to the juxtaposed wall of the cargo compartment at upper and lower portions enabling relative horizontal movement of the container parallel to the wall. At least the upper anchor assembly also enables vertical displacement of the anchor member or members secured to the container relative to the wall.
Abstract:
The present invention concerns a stretch machine with a drive mechanism which is placed in a drive enclosure (3). This drive is covered by a movable top (2), which lies with its edge areas (24) on a stationary part (10) of the stretch machine and which top carries a blower (4) with at least one suction side and one discharge side. The blower stands with its suction side in connection with a filter (5) and with its discharge side open to the interior of the drive enclosure (3). Within the drive enclosure is provided an air distribution system (6). This is so arranged and so oriented that the blower (4) produces, in the entire peripheral area of the cover (2), an effect which is essentially of uniform strength. The blower 4 is provided with a control apparatus (71) for a reversal of its direction of impelling air.
Abstract:
A spinning or twisting device in which a yarn is to be back-fed into the bore of a pipe-shaped element subjected to negative pressure in order to repair a yarn break. This pipe-shaped element is made in form of a yarn draw-off pipe of an open-end spinning device or as part of a pneumatic twisting device.A presenting device is moved over and beyond the pipe-shaped element into a yarn inserting position. The end of the pipe-shaped element towards the moving path of the presenting device is provided with a nozzle which is provided, in relation to the bore, on its side towards the yarn inserting position of the presenting device with a yarn support, and on its side away from the yarn inserting position with a yarn insertion groove, oriented in the direction of movement of the presenting device. The bottom of the yarn insertion groove is at a greater distance from the moving path of the presenting device than the yarn support.
Abstract:
A spinning machine with unit to service spinning and winding stations, which is capable of travelling alongside the spinning machine and contains control and drive elements in a housing. The housing is enclosed by covers and is equipped with an anti-collision device taking effect in a direction opposite to the direction of travel. The anti-collision device of each direction of travel comprises two elements, of which the first element is attached to the lateral cover of the housing so as to be capable of pivoting. The first element is made to act as an actuating mechanism of the second element which acts upon the control elements.
Abstract:
A coextrusion head for the continuous production of laminated tubes to be used as parisons in blow molding. The tubes consist of a plurality of layers of synthetic resins. The synthetic resin layers include one or more supporting layers, usually a barrier layer, and adhesive layers as necessary. The layers are brought together by axial, annular feed passageways within the coextrusion head prior to the laminated tube being extruded through a nozzle in the head. Frequently one layer, generally the barrier layer, has different flow characteristics than those of the other layers, whereupon structural defects can arise in the formed tube. The apparatus described forestalls such structural defects by feeding the various layers into confluence in a manner that precludes, or sufficiently minimizes, the time layers having differing flow characteristics have contact with feed passageway walls while in confluence. As a result, shear stresses within or between the individual layers is avoided and the tube so produced is free of structural defects.
Abstract:
A separate boom vehicle is provided for transporting a telescopic boom, which is adapted to be coupled to a revolving superstructure and to be detached from it for transporting. The boom vehicle is provided in its forward portion with a coupling structure for retaining a telescopically extensible part of the telescopic boom, and is provided in its rear portion with a lifting structure for supporting the boom. The lifting structure is so arranged that when it has been longitudinally aligned with the revolving superstructure, a coupling yoke, provided at the lower end of the telescopic boom, is adapted to be displaced by extending and retracting cylinders along tracks provided on the revolving superstructure to a position in which bearing eyes of the telescopic beam register with bearing bores of the revolving superstructure. The revolving superstructure is provided with a pivot pin for coupling the boom to the revolving superstructure.
Abstract:
In a heavy-duty crane particularly suitable for lifting heavy loads over tall buildings, a substructure supports a rotatable main boom. A jib for carrying the load and a secondary spar for carrying a counterweight by means of a cable are hinged to the tip of the main boom. The counterweight swivels together with turning of the loaded crane. The jib is guyed by way of the secondary spar which overhangs so far that the counterweight is disposed beyond the confines of the substructure.