Abstract: A yarn heating chamber is disclosed which is adapted for thermally processing an advancing yarn. The chamber comprises first and second members each having a discontinuity in the form of a groove, shoulder or the like in a surface thereof, and the members are movably mounted with respect to each other between an operative position wherein the discontinuities are positioned relative to each other to define a relatively narrow yarn passage, and a threading position defining an enlarged opening to facilitate threading. Also, heating means is provided for introducing saturated water vapor into the yarn passage in the operative position, and the surfaces of the two members are in substantial heat exchange relation in both the operative and threading positions, so that the temperature of the two members remains substantially constant during a yarn threading operation.

Abstract: The method relates to the hardening of form substances made of building materials and containing binding agents in a pressure chamber of an autoclave to which is conveyed a gaseous heating medium, the temperature of which is increased during a heating-up phase up to a given upper limit value. During a holding phase, the temperature is maintained at least until a given equalization temperature is reached on the inside of the form substances. Subsequently, during a cooling-down phase, the temperature is reduced by reducing the pressure to the expulsion temperature. Porous light building materials in a conventional process would absorb a high amount of water through the condensation of water resulting from steam having been conveyed into the autoclave for the purpose of hardening.

Abstract: This electrically driven children's vehicle has a vehicle body 1 provided with front wheels 2, rear wheels 3, and a motor 8 for driving the rear wheels 3. The vehicle body 8 has a clutch lever 7 attached thereto, which clutch lever 7 is used to turn on and off the transmission of torque from the motor 8 to the rear wheels 3. A forward travel pedal 14 and a backward travel pedal 15 for rotating the rear wheels in the forward and backward direction, respectively, are mounted on the vehicle body 1 at a position where they can be operated by the foot, and these pedals are positioned relative to each other so that the forward travel pedal is disposed forwardly of the backward travel pedal.

Abstract: An end block adapted for use on a kiln car and for retaining a resilient refractory member which bridges between the kiln car and an adjacent kiln car includes a refractory body having a transverse recess. The recess includes an enlarged cavity and a neck portion connecting the enlarged cavity to the end face of the end block adjacent the end of the kiln car. The resilient refractory material bridges between the end blocks on adjacent kiln cars. One end of the resilient refractory material is retained by the recess in one end block and the other end extends into the recess in the end block on the adjacent car or contacts the end face of the end block on the adjacent car. The recess may be off center so that two layers of resilient refractory material may bridge between the two adjacent kiln cars.

Abstract: A nozzle for delivering cooling gas into the work chamber of a heat treating furnace. The nozzle is formed by a resiliently yieldable metal tube having an overlapping seam and adapted to be contracted radially for insertion through a hole in the wall of the work chamber. After being inserted through the hole, the tube springs outwardly into frictional engagement with the edge of the hole to retain itself in place. Flares on the ends of the tube prevent the tube from shifting endwise relative to the chamber wall.

Abstract: The cooling arrangement comprises spaced apart cooling tubes arranged in a frame and interconnected with metallic tie plates. For decreasing thermal stresses without loss of strength throughout the structure, each tie plate is tangentially welded with its edge portions to the adjacent cooling tubes on both the shell and the furnace sides thereof. Each tie plate may be tangentially welded to one adjacent cooling tube and to the other it may be welded on the portion of its surface defined by an arc between tangents to this arc from the location where the tie plate is tangentially welded. The cooling tubes and the tie plates may be provided with fins and, the tie plates and the fins and as well as the walls of the frame have expansion clearances or slots. The frame is filled with a refractory material serving to protect the whole cooling arrangement.

Abstract: A method and an apparatus for calcining pulverulent raw material, in particular cement raw meal, wherein the material is calcined suspended in a stream of hot gas in a calcining zone (4) in an overheated atmosphere by burning fuel in a stream of oxygen-containing gas in the zone, and precipitated in a precipitation zone (9). The rate of combustion of the fuel is accelerated by maintaining a temperature within the range 900.degree.-1250.degree. C. in the calcining zone by dividing the raw material into two streams (22',22) introducing and calcining only the first stream of material (22') in the calcination chamber (4). The temperature of the hot suspension withdrawn from the calcining zone is reduced by 100.degree.-300.degree. C. to a level within the range 800.degree.-1000.degree. C. by suspending the second stream of material (22) in the hot suspension during withdrawal thereof from the calcination chamber (4) and before the calcined material is precipitated in the precipitator (9).

Abstract: The combustion system includes a hearth lined with refractory, a combustion chamber formed in the refractory, an air manifold mounted on the hearth, a plurality of gas manifolds extending through the air manifold and into the combustion chamber, and a diffuser mounted on the manifolds to cause turbulence in the air/gas mixture. The gas manifolds include aspirating means for combining the air and gas. The combustion chamber is elongated and has an elongated neck with a flue gas exit slot over which the work piece passes. The flue gas from the combustion of the air/gas mixture in the combustion chamber increases in velocity as the flue gas passes through the elongated neck and exits the flue gas exit slot. The slot has a length sufficient to permit the work piece to rotate 360.degree. as the work piece rotates and travels through the hearth. This causes the work piece to be uniformly heated over every square inch of its surface.

Abstract: A walking-beam furnace in the heating of metal bodies without bending in which at least a pair of walking beams straddle a stationary beam whose width is greater than that of the walking beams. The stationary beam is formed with a plurality of rectangular recesses opening at a support surface of the stationary beam upon which the metal bodies come to rest and communicate from below with a source of combustion gases so that the hot gas rises to contact the bottom of the metal bodies and the bottom of the metal bodies is subject to heating by radiation from the walls of the recess which converges downwardly to a duct supplying the hot gas. The width of the recess is greater than the widths of the portions of the fixed beam laterally flanking, while the length of the recesses is greater than its width.

Abstract: A heat-resisting furnace roll which comprises a support roll and a ceramic sleeve fitted over said support roll is disclosed. The ceramic sleeve fits loosely over the support roll even when said support roll exhibits maximum expansion in both its radial and longitudinal directions.

Abstract: An apparatus for the heat treatment of a product includes a metallic heat transfer assembly for transmitting heat either directly to the product or to a mould containing the product. The heat transfer assembly comprises a plurality of separate parts which are joined together either permanently or in an operationally separable manner. Each part includes a gas distribution passageway, the passageways together defining a closed loop path for receiving and circulating around the heat transfer assembly hot permanent gas from a hot gas source. One or more heat transfer passageways formed in the heat transfer assembly itself, or between the heat transfer assembly and the mould, communicate with the closed loop path in the heat transfer assembly so as to receive hot gas therefrom and lead this gas to an exhaust outlet to the atmosphere.

Abstract: A method and/or apparatus for drying material is provided, the method comprising the steps of disposing the material in a heating unit to have the heating unit heat at least part of the liquid particles of the material, disposing a charged electrode unit so as to be adjacent one side of the material when the material is disposed in the heating unit and to define a plurality of alternately directed electrostatic fields that are serially arranged in a like repeating pattern and that are substantially constant and non-oscillating so that the fields at least partially extend through the material while the material is disposed in the heating unit, and moving the material in one direction through the heating unit to cause at least a portion of the material to have the particles of liquid thereof serially moved through a field that tends to move those particles in one direction relative to the material and then into the next field that tends to move those particles in substantially an opposite direction relative to

Abstract: The volume of atmosphere needed to inhibit the ingress of ambient oxygen into the furnace chamber (3) of a continuous heat treatment furnace (1) can be reduced by introducing a gas containing free oxygen (e.g. air) into the entrance section (2) and/or exit section (4) adjacent the roof thereof. Thus a relatively inexpensive gas may often be used in combination with an expensive atmosphere thereby significantly reducing overall process cost. Continuous heat treatment furnaces can readily be converted to perform the method by simply inserting adjacent the roof of the entrance and/or exit section a tube (3) having a slot and/or a plurality of downwardly facing holes (9) and connecting the tube to a supply of the requisite gas. The invention is applicable to both double open ended furnaces and continuous furnaces in which the exit section is filled with a liquid, e.g. oil or molten salt. In these latter cases the gas is introduced in the entrance section (2).

Abstract: An open rectangular frame surrounds a group of instruments. A cover is slidably and pivotally mounted to the frame for movement between an operative position wherein it overlaps a majority of the frame and blocks access to the instruments surrounded by the frame, and a stored position wherein the cover rests on an upper surface of a console housing the instruments. The connection between the cover and frame is such that the cover has a portion which overhangs the area of the console carrying the instruments so as to reduce glare and thereby make reading of the instruments easier.

Abstract: A heating device including a flame burner (40) and a nozzle (52) into which the flame (50) from the burner (40) is directed and in which process air is mixed with products of combustion from the flame; the nozzle (52) having hot gas discharge openings (106) through which the hot gases resulting from the mixing action are projected onto articles (10) or other material to be heated.

Abstract: There is here disclosed a calcining apparatus for a powdery material comprising a first preheating series composed of a calcining kiln and preheaters at a plurality of stages for heating the powdery material with an exhaust gas from the calcining kiln, a second preheating series composed of other preheaters at a plurality of stages for heating the powdery material with an exhaust gas from a rotary kiln, and a gas carrying pipe for connecting the first and second preheating series in the middle thereof, a flow path for the powdery material being adapted so that the powdery material fed to each series may be led into the rotary kiln via a combining duct disposed in front of the undermost preheaters in both the series and then via the undermost portions of both the series. Further, disclosed is a calcining apparatus for a powdery material in which a sub-calcining kiln and a calcining chamber are disposed on an exhaust gas pipe extending from a rotary kiln.

Abstract: A device for heating the bitumen layer of rolled roofing material in such a way that said layer becomes soft and sticky enough to adhere to the surface to be covered without burning said layer, comprising a distributing pipe (19) with many small closely distributed burner nozzles (20) for a combustible gas placed inside an elongated boxlike casing (9). The burner nozzles (20) form a row (10) inside the casing which is open at the front and rear. The plates (13, 14) and its width is considerably greater than its height while its length is considerably greater than its width. The distributing pipe (19) runs between the gable plates (13, 14) and is so positioned between and parallel to the top and the bottom plates that air slits (21, 22) are formed between the pipe and the top (11) and bottom (12) plates, respectively, said slits admitting air from the rear (17) of the casing to the nozzles (20).

Abstract: A method of heat-treating particles by contacting within a contacting receptacle particles fed from the top portion of the receptacle with a heated gas introduced from its bottom portion, which comprises(1) moving the particles sequentially from an upper to a lower moving layer portion through a multiplicity of moving layer portions formed by partitioning said contacting receptacle with a plurality of funnel-shaped supporting plates, said movement being effected via porous plates provided in the individual moving layer portions to thereby prevent blocking of the particles,(2) meanwhile causing the heated gas to rise sequentially from the lowermost moving layer portion to upper moving layers to contact it with the particles in each of the moving layer portions, the heated gas being supplied through a gas pipe leading from the gas layer of each moving layer portion to a gas dispersing plate provided in the adjoining upper moving layer portion to disperse the heated gas introduced in each adjoining upper moving

Abstract: An improved method for cooling particulate solids in an expanded bed by successively charging the particulate solids to a plurality of expanded beds with the exhaust gas from each of the plurality of expanded beds being discarded.

Abstract: A spring clip (30) for holding chip carriers in place on a pallet (20) serves to urge a case (12) seated in each of a plurality of pallet cavities (22) against an underlying lid (14) therein during fabrication of the chip carrier (10). The spring clip (30) comprises a central shaft (32) which extends vertically through the center of a metal plate (31). The plate (31) has a plurality of radially outstretched resilient arms (36), each sloping downwardly from a separate side thereof and having an upturned end (37). The lower end (38) of the shaft (32) is sized for lockable engagement with a corresponding one of a plurality of receiving passages (24) in the pallet (20). Each passage (24) is surrounded by a group of pallet cavities (22). When the first end of each shaft (32) of the spring clip (30) is lockably engaged with the pallet (20), the chip carriers (10) are held on the pallet (20) by the ends (37) of the arms (36).