Abstract:
The instant invention relates to a process for the adjustment of a drafting unit of a draw frame. The drafting unit is equipped with drafting rollers (5, 5') supported in a pillow block (4, 4'). The pillow block (4, 4') is installed on a table (10). The height of the table (10) is adjusted by a first set of adjusting devices and the pitch of the table (10) is adjusted by a second set of adjusting device in relation to the frame (2). The table (10) is installed between the pillow block (4, 4') and the frame (2) for the positional adjustment of the pillow block (4, 4').
Abstract:
The present invention is concerned with a process for the filtering out of fibers form an air stream, in which process a stripping blade (3), for the purpose of cleaning, is moved along the surface of a filter (2) installed in a vacuum chamber (10). A controlled linear drive (51) is applied to the said stripper blade (3), by which the stripping blade (3) is made movable for the carrying out of a two phase operational motion along a linear path of travel. The end positions are located at opposite sides outside of the surface of the filter (2) in areas (A, B) wherein the stripping plate (3) is without contact with an opposing surface. During the first phase of travel, the fibrous material is scraped from the surface of the filter (2), while during the second phase of travel of the stripping blade (3) the said fibers are pressed against the filter (2) and the stripping plate (3) essentially moves back over the fiber without taking the said fibrous material with it. The low pressure in the filter chamber (12) is measured, and upon a drip in the measured low pressure to a point lower than a specified low pressure, the stripping blade is activated at least one time to carry out the said operational movement.
Abstract:
A mobile crane comprising a chassis, which has at least two axles and on which a revolving superstructure is movably mounted by means of a slewing bearing consisting of an outer ring and an inner ring, a preferably telescopic boom, which is pivoted to the revolving superstructure and which is adapted to be supported on a supporting bracket of the crane in position for road travel, and a cabin for use during crane and road travel operations. A carrying ring is rotatably mounted on that ring of the slewing bearing which is connected to the revolving superstructure, the cabin is secured to said carrying ring, and the cabin or the carrying ring can selectively be connected either to the chassis or to the revolving superstructure.
Abstract:
The invention relates to a mobile crane comprising a lower vehicle and an upper vehicle turningly mounted thereon and bearing a telescoping boom with a luffing cylinder for the pivoting thereof. The telescoping boom comprises two parts able to be bolted together and each having an external tube, from which respectively at least one telescope member may be extended.
Abstract:
In order to service work stations of either spinning or doubling machines of the type having several service units travelling alongside their work stations, whenever an inspection of a given service unit becomes necessary, the given service unit to be inspected is brought from an operative condition into an inspection position. Such position is crosswise to the usual operative direction of travel of the service unit, and its side to be inspected (and which is otherwise turned towards the machine) is preferably thereby rendered accessible. Also, its normal work path is opened to use by another service unit. Such other service unit then travels into the opened work path and takes over the task of servicing the work station or stations in the assigned operative work area of the given service unit being inspected until same is brought back from its inspection position into its work path upon completion of the inspection, and again assumes the task of servicing work stations of its assigned work area. For such purposes, in one exemplary embodiment, a section of running rail on which the service unit operates can be moved crosswise to the longitudinal direction of such running rail. During inspection of a given service unit, the remaining service units are prompted by a control device to service those spinning stations which would normally have been serviced by the given service unit which has been brought into its inspection position.
Abstract:
Method and apparatus for producing silicon nitride molded bodies by means of a pseudoisostatic hot pressing process. Silicon nitride is initially ground in a grinding vessel with grinding elements wherein the vessel is lined with the same material from which the grinding elements are made, e.g., hot pressed silicon nitride. Grinding is continued until a specific surface area greater than 15 m.sup.2 is obtained. The grinding takes place in the presence of a grinding liquid to prevent oxidation of the freshly ground silicon nitride. The silicon nitride suspension is then treated in a pressure vessel to remove the grinding liquid therefrom and form a blank. The blank is thereafter embedded within a pressure transfer medium, e.g., boron nitride, and inserted into the die of a hot pressing furnace to obtain the desired hot pressed silicon nitride.The pressure vessel used in this method comprises a chamber for the silicon nitride suspension, an outlet means connected to the bottom of the chamber to permit the vacuum removal of the grinding fluid from said suspension; and an inlet means connected to the chamber for admitting an inert gas, e.g., nitrogen, into the chamber.
Abstract:
An extruder head wherein the housing for a mandrel has a lateral inlet for admission of plasticized material into an arcuate bore of the mandrel and the mandrel has two divergent connecting passages which cause the plasticized material to form a first tubular stream with two radial seams at the inner end of an elongated annular chamber which is defined by the housing and mandrel and wherein the material flows toward an extrusion orifice. The inner end of the chamber contains a ring which divides the first stream into two discrete streams one of which flows along a neck portion of the mandrel and the other of which flows around the ring. The two discrete streams merge into a fourth tubular stream downstream of the ring. The periphery of the ring and/or the neck portion of the mandrel has inclined baffles which subdivide the respective discrete stream into several fields whose boundaries at the downstream end of the ring are out of alinement with the seams of the other discrete stream. This insures that the fourth stream does not have any radial seams which extend all the way from its inner to its outer surface.
Abstract:
The invention relates to a device for atomising fluids and having a bottom part (1) and a top part (2) disposed so as to be axially symmetrical with the bottom part, and comprising an intake air arrangement (3) and an outlet nozzle (4). The atomiser according to the invention also has an insert (5) for receiving a fluid (23) and a nozzle arrangement (6) disposed so as to be axially symmetrical with the intake air arrangement (3). The intake air arrangement (3) has a hollow cylindrical duct (7) with a conical widening (8) towards the incoming air end. As a result of being constructed according to the invention, the atormiser is particularly suitable for local inhalation anaesthesia, e g. in preparation for examination of the bronchi.
Abstract:
A mobile crane is disclosed which comprises a telescopic boom, which is pivoted to the rotating superstructure or rotating deck of the crane and is adapted to be luffed by a luffing cylinder, which is pivoted to the boom and the rotating deck. A guying yoke is pivoted on the rear of the telescopic boom near the middle of its base box. Two axially aligned spaced apart rope pulleys are rotatably mounted at the outer end of the guying yoke. A reversing rope pulley is provided adjacent to the top end of the telescopic boom. Also, a winch is provided with a rope, which serves to guy the telescopic boom and extends around one rope pulley of the guying yoke to the upper reversing rope pulley and back around the other rope pulley of the guying yoke to a fixed point. The winch and the point to which the rope is fixed are disposed on mutually opposite sides of the telescopic boom adjacent to the pivotal axis of the boom. The guying yoke is restrained by a hydraulic piston-cylinder unit, which is pivoted at one end to the guying yoke above the pivotal axis of the latter and is pivoted at the other end to the base box near the middle thereof between the pivotal axes of the guying yoke and the telescopic boom.
Abstract:
Accumulating heads to produce preliminary blanks for the production of hollow plastic articles such as containers by the blow process (known as the "joint extrusion process"), such blanks, being of cylindrical "tube" configuration and also laminates which are layers of different material. Suitable accumulating tube heads for the joint extrusion process are disclosed wherein the layers retain their relative positions and thickness ratios over their entire length up until expelled from the nozzle. The accumulating heads each have a plurality of coaxial annular feed passages, each fed from a different extruder, which open into an annular space and passage. The annular passage is located between the facing walls of concentric inner and outer packing washers. Concentric inner and outer annular pistons slide on the opposed surfaces of the washers and reciprocate in the reservoir chamber for expelling the plastic laminate through an annular nozzle conduit and an annular nozzle to form the laminated preliminary blanks.