Abstract: A method and apparatus for drying organic products utilizing a microwave heater in a cavity. In order to prevent the microwaves from leaking out of the cavity while the products are being transported through it by a conveyor, labyrinth seals are located at both the entrance and exit to the cavity.

Abstract: An improved process for drying water-wet, cellulose ester membranes is described. It has been found that by contacting one side of the membrane with a liquid mixture of a water-miscible, volatile C.sub.1 to C.sub.6 hydrocarbon and a water-immiscible organic compound, while an inert gas stream or vacuum is maintained on the other surface of the membrane, water can be displaced from the membrane economically, rapidly and without adversely affecting the structure of the membrane. A 1 to 1 volume mixture of isopropanol and isooctane is particularly preferred in this step. The essentially water-free membrane is then dried by applying reduced pressure or an inert gas stream to produce a membrane having exceptional separation characteristics.

Abstract: A hair dryer is provided with a hot air vent for preventing excessive rises in the air temperature of its hair-winding attachment. This vent is in addition to the air blowing holes of the hair-winding attachment for drying the hair. The dryer includes a temperature-sensitive valve for opening the hot air vent at a predetermined abnormal air temperature in the hair-winding attachment to prevent an excessive rise in temperature of the air in the hair-winding attachment which may damage the hair or the dryer body.

Abstract: A clothes dryer with a non-circular front access opening is provided with a split ring bearing attached to the dryer drum in a manner to allow for expansion and contraction of the bearing relative to the drum and which rides on a support ring which is attached to and conforms to the access opening, thereby providing a front support for the drum.

Abstract: The invention relates to an outsole for sports shoes, particularly for shoes used for long-distance running on hard tracks. The outsole consists of a soft elastically flexible material, preferably plastics material, and is thickened rearwardly in wedge formation. In the region of the heel tread surface of the outsole, there is provided a recess which is open towards both side edges of the sole and in which a resilient elongate supporting member is fittingly insertable. Preferably a plurality of supporting members are inserted in corresponding recesses adjacent one another. The supporting members are replaceable and permit the effective sole flexibility in the region of the heel tread surface to be adapted to the individual requirements of the runner and the track.

Abstract: A footwear such as shoes, boots, slippers etc., comprises a three-layered structure including an outer cover, an intermediate layer made of foamed urethane and an inner cover.The inner cover has a double-layered structure including first and second layer of fabric and the first and second layer are so combined as not only to show good absorption of the sweat emitted from the wearer's foot but also to keep the surface thereof held in contact to the foot dry.

Abstract: A dredging apparatus comprising a floating device and a frame suspended adjustably therein. The frame supports reversing wheels 1,2 for an endless conveying member 3 provided with blades 4 for loosening and feeding upwards the soil material. The apparatus is further provided with a chute 29 for receiving the material discharged from the members. The endless conveying member 3 comprises a closed endless belt 3 flexible in at least one direction perpendicular to its surface and provided with digging blades or partitions 4 fixed thereon. The frame is provided with a tube 9 open at top and bottom. The upwards running section of the endless belt 3 runs through the tube 9 which encloses the belt 3 with blades 4 with a small clearance. Furthermore, the frame has a part 14 projecting downwards beyond the tube and supporting a reversing wheel 2 for the belt 3. The angle of that part with respect to the vertical is adjustable such that the belt section 22 can engage the bottom at the inlet of tube 9.

Abstract: This plough adapted to be mounted on a railroad tracklaying machine comprises in its plough area members capable of disaggregating and/or thrusting aside the old compact ballast. These members consist of ejectors acting like pistons and extending through apertures formed in the ploughshares; the ejectors movable across the normal direction of travel of the plough under the control are driven by an actuating mechanism imparting a reciprocating motion thereto, and may be replaced by blades disposed beneath, and substantially parallel to, the ploughshares, the actuating mechanism being adapted to impart to these blades a movement substantially of translation along a closed path.

Abstract: A fabric tensioning roller has a longitudinally extending channel within which is disposed a fabric holder. A threaded member on the roller is connected to the fabric holder for selectively moving the fabric holder relative to the roller in a direction perpendicular to the longitudinal axis of the roller for fabric repositioning at selected locations along the roller.

Abstract: The edge portions of a screen fabric are attached to a screen printing frame. The frame has discrete springs in contact with the fabric adjacent the location of securement of the fabric to the frame. The springs provide for a limited amount of movement of the fabric toward a substrate by deformation of the springs instead of relying only on stretching the fabric.

Abstract: A marker system for pipes or valves comprises a tape having a surface layer and a pressure sensitive adhesive layer, the tape defining spaced-apart transparent window areas. A release paper backing is deployed on the adhesive layer of the tape, and the release paper backing includes pre-cut window backing portions generally registered with the transparent window areas of the tape. The pre-cut window backing portions may be joined with the release paper backing along a hinge/tear line whereby the window backing portions may be folded away from the tape. The marker system further comprises information cards sized to be adhered in the transparent window areas of the tape. The marker system is installed by first removing or folding back the pre-cut window backing portions of the release paper backing and adhering the information cards in the window area.

Abstract: The apparatus includes a card rack having a plurality of slots each aligned with an inclined channel adapted to receive a card. The rack has at least one longitudinally extending trough which communicates with each channel so that a portion of each card will be exposed in the trough. A card stripper is provided for stripping cards from the channels and through their associated slots. The card stripper has a portion receivable in the trough for contacting the ends of the cards as the stripper is moved along the trough.

Abstract: A device for storing and delivering rotational energy for rotation of a mobile is used in combination with a source of rotational energy and a control device adapted for intermittent actuation of the energy source for a predetermined period at predetermined intervals. The energy storage device has at least one multi-filament non-braided cords connected between first and second cap members. The first cap member is detachably connected to the energy source and the second cap member is detachably connected to the mobile. The cords are wound by and in response to actuation of the energy source, and urge the mobile to rotate following deactivation of the source. A method of constructing a plurality of the energy storage devices is also disclosed.

Abstract: A lighted display sign having a main frame or cabinet for supporting a light source and one or more sign faces characterized by a decorated sheet of flexible translucent material such as that manufactured under the trademark PANAFLEX. The sign face is mounted on a removable face frame comprising a perimeter member and a plurality of spaced apart brace members connected at their opposite ends to opposed longitudinal portions of the perimeter member. The brace members stand off from the plane of the sign face to eliminate perceived shadows on the sign face from the light source. The sign facing is attached to the perimeter frame by a plurality of spaced apart threaded fasteners which secure the facing material to a surface of the perimeter member which is opposed to and spaced from the front surface of the face frame coplanar with the decorated face.

Abstract: Apparatus for collecting cartridge cases ejected from an associated firearm, having an action and an elongated barrel having a geometric axis. A container has at least first and second elongated flanges disposed in mutually perpendicular relationship with the first flange disposed in substantially perpendicular relationship to the geometric axis of the barrel. A deflection surface is provided for deflecting ejected cartridge cases. The deflection surface has at least a part which is generally planar and which is disposed in oblique relationship to the first elongated flange. The apparatus includes a structure for removably securing the container to the associated firearm adjacent to the action.

Abstract: An improved ammunition clip for a gun comprising a manually retracted and locked pressure plate to serve as a device to facilitate the rapid loading of cartridges into the ammunition clip, and according to another embodiment of this invention, incorporating in addition, a hinged section to serve as a device to allow for the rapid loading of cartridges without (necessitating the) removal of the ammunition clip from the gun.

Abstract: The firearm has a rigid frame comprising a pair of vertically spaced substantially parallel hollow rods which are interconnected at their respective front and rear ends by vertical crosspieces. A barrel is mounted between the hollow rods and at the end of the barrel in the vicinity of the rearward end of the frame is a breech assembly which is interconnected to both the upper and lower rods. A shoulder support is mounted on the rear ends of the rods and positioned symmetrically with respect to the barrel. The shoulder support and other components of the firearm such as the pistol grip, front stock, rear stock and sight means are each individually and independently adjustable on the frame so as to conform to the physical characteristics of an individual shooter.

Abstract: A fishing line retention device is disclosed for use with a trolling apparatus which detachably retains the line to the weight carried by the trolling apparatus, but permits quick detachment therefrom upon a fish strike. The device includes a body portion attached to an arm extending from a weight with a pivotably mounted body portion attached to the first body portion having a spool detachably retaining the line.

Abstract: A kit for children's playing, fortune-telling, learning or the like use, including at least one pair of block pieces each carrying a figure thereon and at least one of which is of transparent material. The block pieces, of planar or cubic form, are laid one on the other to form a composite picture of the figures carried by the respective pieces, which is visible viewed from the transparent block side and changeable by changing the relative angular position of the block pieces. The cubic block pieces can each have three different figures respectively applied to its three faces forming a vertex so that the number of composite pictures obtainable therewith is multiplied. The wide variety of composite pictures obtainable with the play kit of the invention makes it highly attractive to children and also to grown-up people, despite of its extremely simple construction.

Abstract: An educational toy based on the use of three-dimensional numerical figures which can be more easily memorized upon their manipulation by a child and which are constructed and arranged to be interconnected to form a three-dimensional representation of a human head having different facial expressions representative of different moods, such as sadness, sorrow, joy, fright, surprise, etc. This toy includes a plurality of three-dimensional numerical figures including the ten different numerical figures forming the arabic numbers and having each a connecting aperture, projection or both to removably interconnect sets of those figures to form different facial expressions.

Abstract: A connecting device for a toy building set includes two identical connectors, each comprising a primary tubular sleeve having a toothed rim on one end face and a secondary tubular sleeve integral with the surface of the primary sleeve. The secondary sleeve is disposed at right angles to the primary sleeve with one end face adjacent the toothed end face of the primary sleeve. The sleeves have a circular cross-section permitting rotation about a shaft, but rotation is prevented by a pair of stop rings which are frictionally and slidably mounted on the shaft and serve to clamp the sleeves together. When assembled, the two connectors are interlocked by meshing of the toothed rims.

Abstract: A toy push type vehicle with front and rear doors, each door being individually operated either by a handle thereon or by a push down projection on the bus roof whereby objects, such as figures of humans with an annular groove in the base region thereof, are forced into the vehicle upon movement thereof by means of the open front door and vehicle forward movement. The object moves along a slot disposed between the rear and front doors and within the vehicle which is of slightly greater width than the width of the groove in the object base region. The object has sufficient length beneath the groove to be in contact with the floor upon which the vehicle is being pushed. In this manner, the object slides along the slot within the vehicle toward the rear door due to friction between the object and the floor. Because the slot extends from the front door to the rear door, the object will move toward the rear door and be stopped at either the rear door or by another figure between the object and the rear door.

Abstract: A system for controlling environmental conditions in greenhouses having a plurality of crop beds. The system comprises sensors stationed over crop beds comprising an aspirated enclosure and means therein for generating analog electrical signals indicative of wet bulb and dry bulb temperatures. The system comprises a microcomputer located within the greenhouse having a central processing unit with associated scratch memory and program memory sections; an analog to digital input section for receiving the analog electrical signals from the sensors; an output section for converting the computer logic signals to electrical signals at power levels to operate electromechanical apparatus; and serial digital pathway means for connecting the central processing unit, input section and output section.

Abstract: Apparatus for controlling moisture content in soil having a first fabric to be immersed in a water reservoir and to move into and out of contact with a second fabric to transfer moisture to the second fabric and then to an absorbent fabric underlying the soil. Movement of the first fabric into and out of contact with the second fabric to control moisture content in the soil is controlled by a lever which hangs downwardly from a pivot and holds the first fabric at its lower end. The lever is urged in one direction to break contact between the first and second fabrics, by a biassing means. It is urged in the other direction to renew the contact by the pulling action of a moisture-responsive stretchable and shrinkable material which shrinks during drying of the upper regions of soil and so creates the pulling force.

Abstract: A frame which is for mounting windows or pre-hung doors in openings of an existing structure and which includes an extruded metal or plastic outer frame, a wooden frame for the support of the extruded outer frame, fasteners which are used for attaching the outer frame at a window or door opening, and a molded cover which is secured to the outer frame and conceals the fasteners attaching the frame to the structure.

Abstract: A nonbracing self-framing window buck frame or surround for forming a framed window opening in a cast concrete wall or the like. The buck frame or surround comprises a support frame made of channel members arranged end-to-end to form a substantially rectangular framework. A window frame is fit within the framework formed by the channel members, such that a peripheral mounting flange on the window frame abuts one side of the framework. A frame structure adapted to receive nails or other fasteners abuts the peripheral mounting flange of the window frame, and means are provided for securing the support frame and frame structure together, with the peripheral mounting flange on the window frame being held securely between the frame structure and the support frame. The buck frame or surround, including the self-contained window frame, is positioned between wall forms, and concrete is poured around the buck frame or surround. After the concrete has cured, the forms are removed.

Abstract: A floor sealing gasket is described for use under wall panels in cooler constructions. The gasket comprises an elongate strip having a base with a generally flat bottom surface. A flexible downwardly projecting tip extends along at least one edge of the bottom surface of the base and generally parallel arms extend upwardly from each side of the base. The upper portion of each arm includes a flexible wing which is biased inwardly.

Abstract: A wall protecting assembly is provided for protecting outwardly exposed intersecting wall surfaces adjacent the intersection thereof comprising a rigid base plate securely attached to the wall surfaces and overlying an associated corner and a semi-resilient cover member mounted in spaced relation to the base plate. A cushion member projects outwardly from the base plate adjacent the corner so as to cushion impacts administered to the cover member and retains the cover member in spaced apart relationship relative to the base plate. Stop members are utilized to maintain spacing between the base plate and the cover member at locations spaced from the intersection.

Abstract: A building construction assembly has a plurality of vertical posts and horizontal members each formed of a plurality of parallel shell elements and each having on at least one face a pair of flat laterally projecting flanges. The flanges lie generally in a plane and define an opening. Wall panels are secured to these flanges, which are integral with the respective shell elements, by means of C-shaped clips each having one arm engaging the flange in one direction and another arm engaging the panel and pressing it in the opposite direction against the flange. The flanges may be bent back double and received in resilient channels.

Abstract: An elevator cab is constructed of a thin, somewhat semirigid skeleton. Expanded core plastic panels are attached to the skeleton, thereby forming a very light and rigid cab. These panels are attached by means of releasable hook-like fasteners, thus permitting selective removal of the panels from the skeleton. Due to strategic location of the fasteners on the skeleton, the panels, when attached to the skeleton, create a rigid cab.

Abstract: A frame assembly for mounting a light in a door comprises inner and outer half-frames which sandwich a translucent panel therebetween. Each half-frame is substantially identically formed as a unitary member from sheet metal and has a plurality of substantially identical side members which define a closed polygon. Fasteners couple the half-frames to each other and secure the half-frames in the opening in the door. The fasteners can include a plurality of externally threaded fasteners which extend through holes in the half-frames and a plurality of plastic tubular retainers. Each tubular retainer has an axially extending bore coaxially aligned with one of the holes in each of the half-frames and threadedly receiving two of the fasteners in its opposite ends. The unitary nature of the frame and the fastener arrangement facilitate manufacture and assembly, while the fastener arrangement additionally provides a thermal break between the metal half-frames.

Abstract: A fastening arrangement for multiple sections of structural flooring and the like having contiguous corners (10a, 10b, 10c, 10d). The corner end of each section is grooved to present a sector (13) of a cylinder which when combined present a cylindrical bore at the junction of the section corners (10). At least the upper surface of each corner (10) has formed therein a dovetailed recess (15) which widens away from the corner junction point. A flat locking key washer member (17, 22) having dovetailed tabs (20) is fitted into the recesses (15, 15') maintains the contiguous corners (10) in place and a bolt (21) passing through a central aperture (18) of member (17) and to the cylindrical bore presented at the corners (10) may be employed to secure the assembly to a supporting structure (11).

Abstract: Mid-wall panel joints for joining first and second upstanding wall panel members tightly together with their front surfaces in a common plane. A first embodiment utilizes a combination of spacer members and alignment plates fixed to the rear surfaces of the wall panel members, and an elongated joining member which has first and second columns of elongated slots. The spacer members on the first and second wall panel members extend through spacer head receiving portions of the elongated slots and the joining member is then downwardly advanced to a frictional locking position. A second embodiment utilizes spacer members and a split or divided elongated joining member, adjustably clamped together, which permits alignment of the front surfaces of the wall panel members in a common plane, notwithstanding the joining of wall panel members having different thickness dimensions.

Abstract: A walk-through scaffolding having two first vertical frame components adapted to engage a hurdle top scaffolding frame, the first frame components each having a vertical tubular member to engage a corresponding spigot on the hurdle frame.

Abstract: A foam made from the reaction of a multifunctional isocyanate and a catalytic amount of an isocyanate polymerizing catalyst and method for making such foam are disclosed in which the foam is modified by forming the foam in the presence of water and a softening agent selected from the group consisting of a chlorinated alkane, brominated alkane, alkyl ester of an alkanoic acid, alkylene oxide, aromatic hydrocarbon, acylnitrile, aliphatic ketone, aliphatic aldehyde, aliphatic ether, alicyclic ether, amide of an alkanoic acid, and mixtures thereof, wherein the foam is modified by the water and the softening agent in an amount effective to provide a gel time which exceeds the rise time of the foam. A method of filling wall cavities with the foam and composition for preparing the foam are also disclosed.

Abstract: The pressure to the cracks in the concrete building and the like exerted by a binding material supplied thereinto is buffered by the expansion of a pressure buffering portion located somewhere between the supply pump and the supply pipe and after the supply pump is disconnected, the binding material supplying operation is succeeded by the pressure buffering portion which, having therein reserved the binding material by expansion, forces the binding material out into the cracks by contraction.

Abstract: Packs 12 of coffee or the like centrally disposed on a carton blank 11 are pushed down into the mouth of a holder compartment 53 by a ram sensing plate 33 under predetermined pressure, which folds up the side walls 16, 17 of the blank in a U-shape. Pivot arms 41, 42 disposed on opposite upper sides of the compartment and having vertically spaced embossing edges 38, 39 at their ends are then moved inwardly to crease the side walls at the height of the compressed packs in cooperation with sharp edges 34, 35 of the sensing plate. The latter is then withdrawn, whereafter horizontally movable folding tools 51, 52 move in laterally to bend down and overlap the upwardly extending coverwall tabs 19, 20.

Abstract: A mailing and display package and method for manufacturing the same is prepared from a cardboard or paper board blank which is divided into two panels by a fold line. A window is cut in the blank and is symmetrical in each of the two panels on each side of the fold line and is further bordered on all sides by the blank. A piece of transparent film covers the window and the blank is folded along the fold line until the two panels of the blank are in face to face contact at which time they are secured to each other. The transparent film material forms an enclosed transparent pouch to retain a product for mailing or displaying.

Abstract: A method of and apparatus for wrapping units to be wrapped, such as two rolls of paper, in which transverse lines of weakness are formed in a web of flexible sheet wrapping material at measured intervals along the length of the web corresponding to wrapper length as the web is continuously fed forward, the web is formed into a tube around the units with the lines of weakness extending girthwise of the tube and spaced lengthwise of the tube at the wrapper length intervals, the units are fed into the tube one after another spaced lengthwise in the tube at wrapper length intervals and located between the lines of weakness, the tube with the units therein is continuously fed forward at a predetermined speed, and the leading wrapper of the tube with a unit therein is pulled forward at higher speed to sever it from the tube at the line of weakness between it and the preceding wrapper.

Abstract: A packing machine having a film former for converting a flat, unfolded web of thermoplastic film material into a relatively flat rectangular tube with one major surface of the flat tube having an inwardly turned edge and the other major surface of the flat tube overlapping the turned-in edge. In one embodiment, the former itself comprises a single piece of rigid sheet material which has a generally rectangular portion with an isosceles right triangle integrally formed thereon, the two legs of that triangle being aligned, respectively, with an end edge and an adjacent side edge of the rectangular piece. The sheet material is then folded over or otherwise formed such that the end edge and its extension, i.e., one leg of the isosceles triangle, are parallel to the adjacent side edge with the plane of the folded portion being generally parallel to the plane of the rectangular portion.

Abstract: The present invention provides an electrohydraulic control, which includes both an electrohydraulic valve (36) and an electronic control (382). The electronic control includes an offsetting circuit (622) and is effective to produce an effective driving voltage, for an electrical force-motor (52) of the electrohydraulic valve, that is pulse-width-modulated and that is greater than a fixed proportionality to an input signal (410) by a manually adjustable offset voltage. The offset voltage may be adjusted to produce a null force that exactly balances a spring (129) which presses the valve spool (54) to an overlapped position; so that fluid flow is proportional to an input signal irrespective of the initial load of the spring.

Abstract: A combine (11) is provided with a feed reverser mechanism (81) to drive a pair of feeder conveyors (23, 24) and a header conveyor auger (46) in reverse when the operator detects a jammed condition in the feeder conveyors or auger. The reversing mechanism (81) includes a hydraulic drive motor (92), a wrap spring clutch (93) and a hydraulic actuator (142), which automatically increases the tension on a drive belt (68) when the conveyors (23, 24) and auger (46) are driven in a reverse direction by the hydraulic motor (92). A pump relief valve (191) prevents delivery of excessive torque to the conveyors (23, 24) and auger (46) during a feed reversing operation.

Abstract: A walk-behind, power lawn mower having a double action manual control reqing two distinct actions in order to start the cutting blade of the mower. The control includes a bracket mounted to one side of the mower handle bar, the bracket having a slot with an enlarged opening therein. A control handle connected to a brake-clutch mechanism is mounted with one end in the bracket slot and the other end pivotally received in the other side of the handle bar. A spring acting through the brake-clutch mechanism biases the control handle in a raised position with one end registered with the enlarged opening in the bracket. To start the mower cutting blade, the control handle must be rotated against the handle bar thus releasing the brake and engaging a clutch which controls the cutting blade. However, in order to rotate the control handle, it must first be moved in one direction away from the enlarged opening in the bracket. Then the control handle may be moved in another direction to release the cutting blade.

Abstract: A tea harvester in the form of a wheeled vehicle adapted to straddle at least one row of plants carries therebeneath a horizontal transverse cutter bar in position to clip the tops of the plants in a row. Blower and manifold means are carried by the vehicle for emitting a horizontally-elongated vertically narrow stream of air rearwardly and downwardly across the cutter bar for blowing clippings rearwardly off the bar into the mouth of a conveyor means. The undersurface of the manifold means and its airstream-defining outlet are spaced above and forwardly of the bar to enable the tops of the plants to stand upright in the path of the airstream while being clipped. The conveyor means extends upwardly and rearwardly to convey the clippings to a collecting receptacle. The cutter bar, the blower and manifold means, and the conveyor means are all mounted to vehicle for vertical adjustment to adjust the above-ground cutting height of the cutter bar.

Abstract: A row of spindles carried on a common rail have whorls in tangential contact with a driving belt urged toward the spindle axes by pressure rollers offset therefrom, the whorls being of a diameter on the order of half the roller diameter. Each whorl is journaled on an upper end of an upright, stationary shaft supported by the rail through two vertically separated elastic retainers.

Abstract: A twisted sewing thread comprising at least two strands made of ceramic fibers at least one of which strands is served with organic or inorganic fibers, the strands being individually twisted or two or more strands twisted together in one direction and then an assembly of the resulting twisted strands plied with other like or different twisted strands in the opposite direction to produce the ceramic fiber sewing thread.

Abstract: A process for making filament yarn products is disclosed in which polypropylene, having a molecular weight distribution of less than about 7 and a melt index between about 20 and about 60 is melt spun to produce an as-spun product or additionally interlaced before take-up, twist-drawn, heat set, draw-textured by false-twisting, simultaneously draw-textured, sequentially draw-textured, draw-twisted, draw-Taslan textured, stuffer box crimped and cut into staple fibers, or a plurality of yarns are simultaneously draw-textured by false-twisting while reversing the direction of twist of alternate yarns and thereafter interlacing. Products of improved tenacity, improved birefringence and low elongation are produced.

Abstract: In accordance with the invention there is provided a synthetic sewing thread of multifilament construction characterized by its ability to lessen the buildup of heat at the needle of a high speed sewing machine during the operation thereof, even during the sewing of relatively heavy weight fabrics, so as to allow the thread to be utilized as a substitute for the sewing threads conventionally required in high temperature sewing applications, such as cotton spun yarns or cotton sheathed core yarns. The thread comprises a plurality of texturized continuous synthetic filaments, the filaments having a nonlinear crimped configuration providing bulk to the thread and being entangled with one another along the length of the thread and being further bound together by twist. The thread has a heat protective lubricant coating applied thereto and penetrating the filament bundle.

Abstract: In an apparatus and process for energy recovery from solid fossil, inerts containing fuels the fuel is burned in a pressurized fluidized bed reactor for operating a gas turbine and a steam turbine. The flue gases of the fluidized bed are cleaned of injurious materials before introduction into the gas turbine. The gases are sharply cooled before material removal and warmed to gas turbine temperatures after removal.

Abstract: A process and a device for detecting a rotating stall in a turbojet engine having two rotating spools including a high pressure spool and a low pressure spool, wherein the rotation speed (N.sub.HP, N.sub.BP) of each of said spools is measured, and the derivative relative to time dN.sub.HP /dt of the rotation speed (N.sub.HP) of the high pressure spool is derived. A command signal is generated as soon as the following conditions are met: ##EQU1## where A, B and C are constant values.