Abstract: The tunnel comprises a rigid metal framework (3), a U-shaped covering unit (5) and a raising means (12) for shifting the framework and the covering unit between a service position and an out of service position (3', 5'). The framework (3) includes parallel cross-members (10) and the covering unit is constituted by a smooth metal sheet covered with an insulation material. The covering unit (5) is connected under the metal framework (3) in the region of each of the cross-members (10) by a plurality of articulated suspension means (6).

Abstract: A device for feeding material in the form of a coil of wire from a fixture for receiving and rotating said coil of wire through a straightening apparatus and a heating station to a hot and semi-cold metal-working machine in an intermittent manner. The device includes a cold feeding fixture with one or more pair of rollers which act on the cold wire to pull the wire from the coil and through the straightening apparatus and a hot feeding fixture downstream of the heating station with at least one pair of feed rollers which act on the hot wire and urge the hot wire against a stop of the metal-working machine. The device also includes adjustable link means for driving both feeding fixtures in formulant synchronism with the metal-working machine.

Abstract: A method of providing a slide fastener chain with gaps free of fastener elements at predetermined interval is disclosed, the method comprising imparting a tendency to the fastener chain to spread the confronting longitudinal edges of its opposed stringer tapes prior to removal of the fastener elements, and maintaining constant tension over a length of the fastener chain, whereby the gaps can be formed accurately at predetermined locations along the length of the fastener chain. A preferred form and construction of apparatus tailored to carry this method into practice is also disclosed.

Abstract: An air inlet duct for a jet propulsion missile or other vehicle which is movable between a housed, pre-launch position and an extended or deployed flight position. A method of manufacturing the duct is also disclosed. The duct system includes a flexible leading edge attached to a double-wall inflatable duct body. Drop threads extend between the duct body walls to hold an exact desired contour when the duct is inflated. A pivotable plate moves the inflatable duct between a housed, deflated, position and an inflated flight position. Manufacture of the inflatable duct is basically accomplished by preparing a foamed plastic form in the desired duct wall shape, covering the form with fabric, stitching through the foam and fabric, coating the fabric with a flexible sealing compound, dissolving away the foamed plastic and attaching the resulting inflatable duct to other missile components.

Abstract: A composition useful in isothermal forging or sizing of metal articles comprising a major amount of a glass moiety fusible at a temperature below forging or sizing temperature, and a minor amount of a finely divided abrasive moiety dispersed in the glass moiety and having a predetermined hardness.

Abstract: A hot rolling mill and a method of operation to reduce scrap upon failure of a portion of the mill. A first furnace device is provided in the mill adapted to receive and reel up a strip which is ready to go to the finishing section of the mill. A second furnace device is provided to receive a strip of material being rolled in the roughing section of the mill without reeling up. Both furnace devices maintain the material therein at working temperature and in continuous motion.

Abstract: This invention relates to an automatic device for loading cassettes with roll films, comprising a magazine for roll films, a magazine for cassettes, respective feed devices with separator units for the roll films and the cassettes, a film loading device and a conveying means for carrying off filled cassettes, wherein the film loading device comprises a channel with guides and is arranged along the path of descent of the roll film. A lowerable positioning means is located beneath the channel for the lower cassette section and a pivotable lever with a suction device for handling the upper section is attached to the positioning means.

Abstract: An elongated member inserted through coinciding central openings of interlocking coils at the bottom of a slide fastener is secured therein by deforming one or more of the convolutions of the coils at the bottom of the slide fastener.

Abstract: A stick holder is an accessory having an elongated body rectangular in cross-section, and having support brackets at each end including extending arms and transverse legs. The holder body includes transverse passages for receiving and clamping sticks, which are ejected from an adjacent stick box or hopper and urged into food articles or other articles retained in an article holder on the opposite side of the stick holder. To locate the stick holder in desired relation to the stick box, the stick holder and the apparatus have coacting structure to prevent relative movement. Guide blocks are mounted on the sides of the apparatus, adjacent to the ends of the stick box, and coact with the stick holder support brackets to provide a broader support base eliminating rocking movement of the stick holder about a longitudinal axis, to prevent movement of the stick holder away from the stick box, and to locate the stick holder laterally with some precision relative to the stick box.

Abstract: In apparatus for damping noise in bar-feeding devices of automatic screw-cutting machines a group of rollers is composed of an upper pair of laterally spaced upright rollers and a lower pair of laterally spaced upright rollers, with an endless belt extending around each pair and resilient means urging the rollers laterally away from each other to maintain the belts taut. The lower length of the upper belt and the upper length of the lower belt are engageable with the top and bottom of a rotating and axially moving bar between them.

Abstract: This invention relates to a building construction and method and a kit therefor wherein preferably a spaced front and back end panels are provided with spaced guide blocks positioned on the end panels for receiving therebetween purlins which extend between the end panels. Preferably a templet is used to determine the silhouette of the panels and the position of the guide blocks. The purlins are attached to each of the end panels and are guided to and supported in the correct position by the guide blocks. This construction is relatively simple and inexpensive by minimizing the requirement of fabrication of subassemblies such as rafter supports and the like.

Abstract: In a method of continuously plating wire electrolytically, acid crystal and liquid residues originating from the plating bath form on the wire. In order to remove these residues from the surface of the wire, the method of the invention comprises mechanically treating the surface of the wire while supplying a liquid to the wire prior to the mechanical treatment. The wire undergoes treating in the presence of the supplied liquid and the composition of the liquid and residues in such that the residues are not dissolved or emulgated in the liquid. The liquid with the residues can be collected and the residues separated from the liquid so that the liquid can be recycled back to the stage of mechanical treatment of the wire in a closed circuit.

Abstract: In a rotary pipe bending machine in which the pipe is clamped against a rotary bend die by a clamp die and the two dies are rotated together while a rear section of the pipe is pressed by a pressure die, the clamp die is adjustably mounted for motion tangentially of the bend die. The clamp die can be driven between a first position in which it is spaced forwardly of the bend die axis and forwardly of the bend die, and a second position in which it is positioned substantially at a point of tangency between the pipe to be bent and the bend die. The position of the clamp die is chosen according to the length of the straight portion of the pipe between a previous bend and the point at which the next bend is to be made.

Abstract: A machine for the manufacture of an axially prestressed coil out of a strip of material for covering various types of machine components, such as spindles, shafts and columns. The coil is to have an elongated and spiral-like form. The machine which is capable of manufacturing this product includes a feed roller pair for feeding the strip by the use of an associated feed drive mechanism. The feed rollers are movable against one another through a clamping device. A bending roller is arranged at the exit from the feed rollers. A support structure is provided for the bending roller to facilitate a movement thereof to effect not only a cylindrical bending of the strip material but also, and upon a swivelling of the bending roller, a cylindrical as well as an increasing diameter spiral can be formed.

Abstract: A process for bending large pipes comprises the steps of progressively and inductively heating the wall of a pipe within the region to be bent. The penetration depth of the heat energy is varied over the circumference of the pipe through shielding. The inner radius of the pipe to be heated may initially be heated before the entire wall is differentially heated. Apparatus for carrying out the process is also disclosed.

Abstract: In a heat exchanger, ends of adjacent heat-conducting pipes are flattened to form joining faces and these faces are butt-welded together to form a parallel pipe heat exchanger without end plates.

Abstract: An apparatus for reducing the radius of the bend in a U-shaped tube comprises two squeeze dies and a back die. The back die is hollowed to form a chamber that accommodates the bent section of the tube and supports the entire circumference of the tube at the center of the bent section. Mating slide surfaces on the back die and the squeeze dies cooperate to extend the back die during squeezing in such a manner as to accommodate the longitudinal extension of the tube legs that results from the squeezing; i.e., there is no relative longitudinal movement between the squeeze dies and the tube legs. This arrangement enables relatively thin-walled tubes to be squeezed without undue deformation of the tube.

Abstract: Descaling of metal wire by bending is followed by projection of the scale from the wire. The scale, projected by nozzles in a descaling device, is a mixture of new scale coming directly from the wire undergoing the bendings and scale recycled several times by a recycle feedback path. This application is applicable to the treatment of steel wire known as "rod" coming from hot rolling.

Abstract: An internally cooled mandrel is provided with regularly arranged copper fingers projecting into the inner flow space and leaving a recess adjacent the outer surface which is filled with buildup. These fingers are arranged in axial rows in which the pins are staggeredly positioned.

Abstract: An automatic machine for coiling metal wires to form springs including means for variably adjusting the diameter and the pitch of the spirally formed spring and for variably adjusting the length of the springs formed by said machine.