Abstract: An ultrasonic scanner for producing a sector scan in an object to be examined in which one or more ultrasonic transducers traverse an arcuate path with respect to a reflector which is positioned to receive the ultrasonic waves scanning the surface of the reflector from each of the transducers and converge such waves at a point of a preselected distance in front of the reflector. In general, the ultrasonic waves are converged at a point outside the scanner and inside the object to produce a sector scan in the object having its center at the convergence point. In one embodiment of the scanner the reflector only partially reflects the ultrasonic waves and an additional stationary transducer is provided which is positioned to produce ultrasonic waves which radiate through the reflector and coincide with one of the lines of the sector scan, thus permitting simultaneous M-mode or pulse Doppler echo information to be obtained in perfect registration with the sector scan lines.

Abstract: A dual band pushbutton tuner is disclosed having a pair of tuning slide assemblies disposed on the opposite sides of a pushbutton slide and which can be selectively actuated in conjunction with an operation of the pushbutton slide, without using a shuttle. Each of the tuning slide assemblies is normally connected with the pushbutton slide through connection means, which is constructed such that when one of the tuning slide assemblies is constrained by constraining means, the other tuning slide assembly is permitted to move in response to an operation of the pushbutton slide. The pair of tuning slide assemblies alternately assume this manner of operation as the constraining means is switched.

Abstract: An improved vent operator for controlling the position of an edge opening vent in the roof of a recreational vehicle or the like is disclosed. The vent operator is coupled to an electric motor, manual jamb or crank or the like, and comprises a set of reduction gears and drives two sector arms which raise or lower the vent cover. The gear reduction is accomplished by spur gears which have good mechanical properties. The cost of the entire apparatus is minimized by making the gears from pressed metal, the sector arms from stampings and the housing from castings. The result is a reliable vent operator that can be produced economically in commercial quantities.

Abstract: The control system of the present disclosure is particularly designed for use in the bicycle which is so designed as to change gears upon shifting of a chain guiding mechanism. The control system includes a motor driven reel, a flexible wire connected between the reel and the chain guiding mechanism and a switch arrangement for controlling the rotation of the reel. Upon turning on of the switch arrangement, the motor is rotated by a predetermined amount to perform a suitable shifting operation of the chain to engage with a required gear.

Abstract: The invention concerns a stepless variable belt transmission with pulleys which comprise two axially movable conical halves. The displacement of the pulley halves is effected by hydraulic piston-cylinder units rotating along with the pulleys. At least one hydraulic piston-cylinder unit is provided with a compensation chamber wherein a pressure is built up as a function of the speed. According to the invention the compensation chamber communicates with a closable opening with the cylinder chamber by means of which the pulley halves are relatively moved.

Abstract: A textile apron and method of making same are provided wherein such apron is adapted to be operated in an endless path and comprises a polymeric matrix material having a plurality of discrete reinforcing fibers randomly disposed substantially uniformly therethrough and defining the sole reinforcing means of said apron.

Abstract: A manual transmission shift control arrangement wherein a shift shaft is movable by a shift control lever into and out of a transmission to one of three REVERSE, FIRST/SECOND, and THIRD/FOURTH selector positions, and then rotatable in one direction into REVERSE, FIRST or THIRD, or in the opposite direction into SECOND or FOURTH ratio positions, depending upon the selector position, by two cables and associated levers operatively connected therebetween.

Abstract: A hydrokinetic unit for use with an automatic power transmission mechanism in an automotive vehicle driveline comprising a lock-up clutch for connecting directly the turbine and the impeller of the hydrokinetic unit to effect a fully mechanical, direct drive therethrough, the lock-up clutch being situated internally of the hydrokinetic unit and including a vibration cushion and damper that cushions clutch engagement and eliminates or reduces undesirable torque variations or pulses in the driveline when the clutch is engaged and during clutch engagement thereby improving the driveability of the vehicle.

Abstract: Speed change gears of the planetary gear type suited for applications within fluid couplings used upon automotive vehicles includes an input shaft, a first clutch for releasing or coupling a second ring gear and a third sun gear simultaneously from or to the input shaft, a second clutch for releasing or coupling a first sun gear and a second sun gear simultaneously from or to the input shaft, a first planetary gear engaged with the first sun gear, a first ring gear engaging the first planetary gear, a first carrier rotatably supporting the first planetary gear, a second planetary gear engaged with the second sun gear and the second ring gear, a second carrier rotatably supporting the second planetary gear, a third planetary gear enmeshed with the third sun gear, a third ring gear interengaged with the third planetary gear and coupled to the first ring gear, a third carrier rotatably supporting the third planetary gear and coupled to the second carrier and to an output shaft, a first brake capable of locking t

Abstract: A hydraulic control system for use in an automatic transmission including a fluid coupling type torque converter, and a gear system provided with two or more frictional engaging devices adapted to establish two or more speed conditions.

Abstract: Selected circumferential and axial profiles are formed simultaneously on a rotating workpiece by apparatus that comprises a carrier that is mounted for movement toward and away from the workpiece and carries a cutting element which is pushed by a spring into engagement with the workpiece. The carrier simultaneously follows a circumferential cam that rotates conjointly with the workpiece and an axial cam that is mounted on a follower bar. The follower bar is mounted on the carrier for movement relative to the carrier solely along an axis parallel to and spaced from the axis of rotation of the workpiece.

Abstract: In the reconditioning or repair of worn out conveyor belts, such conveyor belt to be repaired is drawn at a high tension past a stationary knife edge to cut away a predetermined thickness and width of the top surface portion of the belt from the bottom reinforced portion of the belt. The height of the knife edge relative to the worn edge is adjustable thereby allowing a range of selected thicknesses to be cut for optimum results in repairing the belt in the worn areas.

Abstract: The present invention is a strip feed control which is particularly useful in photographic systems such as film and paper cutters, film notchers, and printers. The photographic strip material is fed by a predetermined feed length during each operating cycle. The operator of the system visually monitors the position of the strip with respect to a reference position or indicator along the feed path and provides adjustment signal through an operator control knob. The strip position is moved in accordance with the desired adjustments, and the predetermined feed length for the next operating cycle is derived from the predetermined feed length of the just completed operating cycle, together with any adjustment in the strip position which was made by the operator.

Abstract: A saw, especially a circular metal saw, is equipped with a device for keeping open the gap cut by the saw blade. For this purpose two chucking members are arranged symmetrically to the right and left of the saw blade on one side of the workpiece and an abutment member is arranged on the opposite side of the workpiece and opposite the saw blade. Power drive means press the chucking members against the workpiece. The workpiece engaging elements of the chucking members may be pointed ridges or conical tips.

Abstract: Web cutting apparatus employs a rotary knife cylinder with elongated, radially outwardly projecting knife blade assemblies spaced around its periphery. A rotary anvil cylinder spaced parallel to the knife cylinder carries a corresponding peripheral array of elongated anvils. When the two cylinders rotate, the knife blades bear against the anvils at the nip between the two cylinders. The knife blade assemblies are flexible and resilient so that each blade edge is biased against its anvil at the instant of interference, with a local force sufficient to cut web. Further, the natural frequency of the knife assemblies is selected to be considerably higher than those of the other machine parts so that the spacing between the knife blades and the anvils at the nip is substantially unaffected by vibrations of those parts. Also the apparatus efficiently removes trim strips produced by the web cuts.

Abstract: A die holder for punch presses for placement in a die set is described. It consists of a die element retained by a frame member supported on pads secured to a die block. A sliding support between the die element and the die block is provided, reinforcing the die upon impact of the punch. The frame member is undercut, permitting saving of material and distribution of mass at points of maximum stress.

Abstract: A mechanism for withdrawing and cutting sheet from a storage roll thereof to predetermined lengths includes a feed roll driven by a clutch transferrable between engage and disengage conditions and a shaft rotatable single cycle cutting blade located forward of the feed roll. The shaft is spring biased in a blade sheet cutting forward direction and means are provided for loading the spring following its unloading. The shaft is releasably locked in a blade retracted position and is releasable by a first solenoid to effect a cutting cycle and a timing member rotatable with the shaft acts through a motion transmission to disengage the clutch and releasably lock it in disengage position at least during the cutting of the sheet. Following the cutting cycle, the clutch may be actuated to its engage position by the energization of a second solenoid. Alternatively, the clutch may be fully controlled by the second solenoid by a circuit network responsive to the positions of the timing member.

Abstract: A workpiece positioning assembly for a machine tool has first and second traverses mounted perpendicular to one another. The second traverse is unsupported at its ends and mounted intermediate its ends upon the first traverse for horizontal movement in a direction perpendicular to the axis of the second traverse. The second traverse has a carriage movable therealong for supporting a workpiece and effecting movement in a direction parallel to the axis of the second traverse. The workpiece positioning assembly is preferably applied to a punch press.

Abstract: In a cutting device of the shearing type comprising two circular blades one of which is in the form of an elastic disc displaceable on a bracket by pressure from a pressure element engaged by a lever, the cutting edge of said blade in the form of an elastic disc being disposed against the cutting edge of the other blade, the improvement wherein said bracket is disposed within a bearing sleeve which in turn is disposed within a bearing of said disc, said bearing sleeve being connected to said lever in an axially inflexible manner, said pressure element disposed adjacent to the cutting area of said blade in the form of an elastic disc and passing a moment into said bearing sleeve and said bearing which is opposed to the moment of any reaction force imposed on said disc in its cutting area.

Abstract: A cutting block or pad having a laminated construction, wherein the adjacent component layers or member elements are mechanically bonded to each other by layers of an electrically conductive adhesive, is disclosed. The block is particularly useful in connection with a clicking die and acts to complete an electrically conductive path as the die first contacts one broad opposing surface of the laminated structure. In a particularly preferred embodiment of the invention, at least one and preferably two electrically conductive rods extend through the interior of the block, normal to the adhesive bonding layers, and each rod is bonded or secured in position by an electrically conductive adhesive material. Each rod thereby makes electrical contact to each adhesive layer, and the electrically conductive rods may also provide mechanical strength to the laminated structure.

Abstract: A fineblanking press having two groups of elements, the first group including an interchangeable die set having an upper die member, a lower die member and guide posts with the second group including a support plate, guide pins and an ejector element, the separate groups providing improved interchangeability, maintenance and stability.

Abstract: An electronic sound generating system is disclosed for use with a stringed musical instrument such as a guitar. An RF oscillator is connected with an electrically conductive string of the instrument and a pickup coil is positioned adjacent to the string so that RF signals of varying amplitude are induced in the coil due to vibration of the string resulting from playing of the instrument. The variable amplitude RF signals are detected and an audio signal produced therefrom that is coupled to a speaker, for example. A stereo output can be provided by placing dual pickup coils adjacent to the string with the pickup coils being positioned normal to one another. Each string of the musical instrument can be separately provided with an RF current of a common frequency or different frequencies.

Abstract: A fretted neck of a guitar having a plurality of strings spaced above the fretboard and a capo selectively movable along the length of the neck for retaining all of the strings in abutting relationship to the fretboard. The capo includes a clamp frame having a generally horizontally extending portion that mounts a retainer bar and a generally vertically extending portion, a finger operated clamp member, and a torsion spring mounting the clamp member on the clamp frame and resiliently urging it to a clamping position, and the torsion spring being mounted on the clamp frame. In one embodiment the retainer bar mounts a roller for each string while in a second embodiment the retainer bar mounts rollers with one of the rollers being of a length to extend across two strings. In a third embodiment the retainer bar mounts two plastic inserts that have downwardly extending rectangular teeth for holding the guitar strings against the fretboard.

Abstract: An anchor base for integral plastic structures includes an articulated series of lever arms joined together in at least one joint by means of a living hinge in order to establish a preferred point of articulation. The leverage is such that, as a first pair of the lever arms are squeezed together to insert them into a mounting hole in a chassis, a second pair of lever arms, for giving lateral support, are initially pulled down. As the anchor base penetrates the mounting hole, the entire lever system pivots while lateral support levers are pushed up to spread the first pair of arms. Shoulders on the first pair of arms are forced under the lower side of the chassis, in order to capture the anchor base and to resist its removal. If the first pair of arms are thereafter squeezed together below the underside of the chassis, it is easy to remove the anchor base.

Abstract: There is disclosed a capped machine nut comprising a polygonal-sided metal nut body having a conical bearing surface projecting from a first axial end, the opposite axial end and the polygonal sides of the body being encased in a sheet metal cup-shaped cap tightly conforming to the polygonal nut body but spaced from said opposite axial end to form a dome. The nut body is formed with a peripheral groove axially intermediate the polygonal sides and conical bearing surface, wherein the shoulder of the groove adjacent the polygonal sides is substantially right-angled so that the lip of the cap skirt can effectively grip the shoulder when crimped into the groove, and thereby retain the cap on the nut body. In a preferred form, the lip of the cap skirt is doubly crimped by folding the skirt edge into the groove at the apices of the polygonal sides, and also intermediate the polygonal apices.

Abstract: One piece metal insert adapted to be embedded in a cavity in a work piece embodies a sleeve portion and a nut portion joined together by a frangible connection. The sleeve portion has an internal diameter which is less than a zone of maximum diameter on the nut portion and is adapted to be moved into a telescoping position about the nut portion so as to be expanded by the nut portion and forced into firm engagement with the side walls of the cavity in the work piece. The sleeve portion has splines on the exterior thereof which are inclined with respect to the longitudinal axis of the insert so that when they are embedded in the side walls of the cavity they will establish a positive connection with the work piece and resist axial movement of the sleeve portion with respect to the work piece.

Abstract: A lock spindle blind rivet assembly is provided which is intended to be received in a hole in a workpiece, and which is made up of a sleeve adapted to be received in the hole, a stem having a forward section with an outer diameter slightly less than the inner diameter of the sleeve and a rear section with an outer diameter slightly greater than the inner diameter of the sleeve, the forward and rear sections of the stem being separated by an annular locking groove which forms an annular shoulder around the stem. A collar having an outer diameter greater than the inner diameter of the sleeve, and having an inner diameter slightly greater than the outer diameter of the forward section of the stem but less than the diameter of the annular shoulder, is slidably mounted on the forward section of the stem to be moved back along the forward section to engage and be stopped by the annular shoulder.

Abstract: An anchoring retainer is provided for mounting at one side of a supporting structure such as a wall, ceiling or the like having an opening therein. The retainer is used with a threaded element or fastener which extends from the other side of the supporting structure through the opening into the retainer and together forms a fastener assembly. The retainer comprises a flexible unitary one-piece plastic body having an axis which is adapted to extend through the opening in the supporting structure. The body has a generally triangular configuration and is provided with a sleeve at the apex of the triangle. An opening is provided in the sleeve surrounding the axis. The sleeve at the edges thereof located on opposite sides of the axis is provided with a pair of integrally formed outwardly diverging flexible legs. A flexible control strut is spaced axially from the sleeve and has the ends thereof integrally connected to the outer end portions of the flexible legs.

Abstract: A small and simply operated recording apparatus employing an elastic pressure element is utilized to make a three dimensional recording in thin metallic foil from each of the two sides of a primary key from which a secondary key is to be manufactured, the recordings placed in an interpreting apparatus, which may be located remotely from the recording apparatus, which permits extraction of precise three dimensional data stored in the recordings whereafter the extracted data is utilized in key cutting apparatus to produce a secondary key, in all comprising a key making system.

Abstract: Plural servo actuators are coupled to provide a redundant system for operating a common output device. Each servo actuator has plural servo valves each having one active output that causes controlled opposite operation of the output device and one passive output. A fault detector coupled to each servo actuator compares the sum of the passive output pressures with the pressures of two other fluid signals, in one case the supply and return fluid signals and in another case the two active output signals of the servo valves, to detect the condition thereof. A convenient checkout system and a fluid by-pass mechanism also are provided in the fault detector.

Abstract: An electrohydraulic actuator has a power piston which is controlled from movement between the ends of its travel for performing work by servo control valve. When the actuator is not performing work, the power piston is abutted on one side by a pressure positioned centering piston which prevents the movement in one direction. High pressure fluid operates on the other side of the power piston to prevent movement in the other direction so that the power piston is centered in the cylinder and cannot be moved by external forces.

Abstract: An impact tool is described which is capable of developing percussive forces for rock drilling, pile driving, seismic exploration and other repetitive high force applications. The tool contains a hammer and a valve which may be hydraulically actuated so as to oscillate; repetitively executing forward and return strokes during each cycle of oscillation. The valve is actuated in the forward stroke direction by being engaged by the hammer, and in the return stroke direction by fluid pressure means so as to switch the pressure in a cavity in which both the valve and the hammer are disposed for developing forces on the hammer so as to sustain its oscillation. A fluid filled pocket is provided into which the valve enters as it moves in the forward stroke direction, after having switched the pressure in the cavity. A passage is provided on the hammer which is dimensioned so that fluid in the cavity is either connected to a channel, the cavity, or entrapped in the pocket, depending on the position of the hammer.

Abstract: A mud pump piston comprising an annular elastomeric ring having an annular circumferential surface defining an acute angle circumferential tip of relatively small area which engages the pump cylinder wall and an annular anti-extrusion ring connected to and displaceable with the elastomeric ring, the elastomeric ring being configurated to correspond with and rest against a dish shaped surface of the anti-extrusion ring presenting a bevelled or diagonal slope extending from the outside diameter (acute to the axis of the mud pump piston) spanning substantially more than half of the radial distance occupied by the annular elastomeric ring and the annular anti-extrusion ring, which diagonal surface merges with a flat surface normal to the axis of the mud pump piston whereby hydro-planing is reduced because of the increased unit pressure load on the small tip area, along a line contact, the tip is automatically wear compensating, friction is substantially reduced by reason of the smaller high pressure wipe area, lo

Abstract: Apparatus for inelastically deforming an initially flat blank of a corrugated fiberboard, comprising two die blocks movable relative to each other and having complementarily convex and concave pressing surfaces and blank retaining means adapted to clamp opposite marginal portions of a blank of a corrugated fiberboard being warped between the die blocks with the marginal portions urged sidewise inboardly of the die blocks, the blank retaining means being operative to restrain the blank from being moved in a direction parallel with the marginal portions but to allow the marginal portion of the blank to move the marginal portions of the blank sidewise inboardly of the die blocks in a direction perpendicular to the marginal portions so that not only production of creases in curved portions of the blank but production of fissures as would be caused if the blank is excessively stretched between the opposite marginal portions of the blank are precluded.

Abstract: A container for goods transport comprising a device for producing a ventilation stream across the loading space so that at any point in the loading space the same desired temperature and degree of humidity will prevail; the improvement is related to, a plurality of closed channels of variable length, one open end of which opens out in a conduit communicating with the ventilation device are arranged on part of the floor of the loading space and a plurality of upright partitions leading towards the other open end of the channels and having the same height as the channels are arranged on the remaining part of the floor.

Abstract: This coffee brewing apparatus includes a reservoir for fresh water, a heating chamber which is filled from the reservoir, a metering chamber which is filled from and entirely surrounded by the heating chamber, and a brewing chamber which receives the coffee to be infused. Valves between the reservoir and the heating chamber are controlled by a timing mechanism. A heater in the heating chamber is controlled by a thermostat to hold the water therein at brewing temperature. An air compressor, which delivers air to the metering chamber to force the heated water therefrom into the brewing chamber, is also controlled by the timing mechanism.

Abstract: A coffee maker assembly constituted by a decanter for boiling water and a separate container for producing with some of this water a highly-concentrated coffee brew, the container having a cap permeable to liquid and gas. The container is seatable in an inverted position over the decanter whereby steam generated by boiling water penetrates the cap and functions to express the highly-concentrated brew from the container into the water to intermingle therewith to produce a brew of the desired concentration.

Abstract: The present invention relates to food industry equipment. It is particularly adapted for use in the production of granulated food products, preferably imitation soft caviar. The device is provided with a heated chamber for keeping said solutions or suspensions under pressure, which has through holes drilled along a concentrical circumference in the chamber bottom. Tightly pressed to the bottom from inside is a revolving disk with through holes that are to match the holes in the chamber bottom during rotation of the disk. A vessel is installed under said chamber to contain a forming liquid and to form granules from the solutions or the suspensions fed into the vessel via the holes in the bottom of said chamber. This vessel is cooled and accommodates a pipe for feeding the forming liquid to the vessel and a pipe for taking it out of the vessel together with formed granules.

Abstract: The invention comprises a food dehydration and bakery product and bread dough raising appliance for household use. The appliance has a heating element within the dehydration and dough raising chamber and a temperature control unit capable of regulating temperature within both the dough raising and food dehydrating temperature ranges. The appliance, when dehydrating foodstuffs, utilizes a fixed volume, constant speed ventilation system wherein air enters the chamber through presized intake ports, is blown horizontally between the drying racks and exits through exhaust vents defined between a frontal access door and the appliance cabinet. The appliance, when used as a dough raiser, utilizes a dough raising shelf with an attached water trough which is positionable directly above the heating element for raising the relative humidity within the chamber.

Abstract: A peeling machine particularly for peeling tuburous vegetables such as potatoes and onions includes a vessel with side walls containing peeling mechanism and a rotatable bottom for tumbling the vegetables within the vessel against the peeling mechanism. Near the bottom, adjacent the center of the vessel and directed generally outward are one or more nozzles into which air under pressure is introduced. Near the top of the vessel located adjacent the side walls, are one or more spray nozzles through which water may be introduced. The introduction of air and/or water is selective, and can be adjusted according to the type of vegetable, and the amount thereof, being peeled in the machine.

Abstract: There is disclosed an apparatus for manufacturing angle-section members and binding these members in bundles, in which the angle-section members, formed at a manufacturing station drop, apex upwards, onto supports carried by a conveyor to form a nested stack of the angle-section members on each support. The stacks thus formed are conveyed, on their supports, under binding devices at a bending station where each binding device bends a fastening element about the stack to form a bound bundle. Each bending device comprises a vertically slidable slide element having a bifurcated lower end defined by two downwardly extending arms the lower ends of which have pulleys around which a chain passes to extend between the arms, and upwardly from the pulleys, on the outsides of the arms, the chain being kept resiliently under tension.

Abstract: A can crusher having a plural stage and incremental crushing action which includes a frame with a buttress at one end and plural fulcrum stanchions at the other end. A handle carrying a pivot pin selectively locatable in fulcrum portions of the stanchion is provided and the handle is pivotally linked to a piston for reciprocal extension and retraction in the frame toward and away from the buttress. The primary crushing impact of the piston with a can resting on the buttress in the frame is askew so that the first deformation of the can is not an axial deforming force and the final increment of crushing movement approaches axial thrust.

Abstract: A dampening system for a lithographic press, comprised of a brush roller contacting a fountain roller immersed in a fluid. The brush roller is contacted by an elongate flicker bar transferring the fluid to a vibrator roller for application to a plate cylinder by a form roller. Drive means operate the fountain roller which is geared to the brush roller. The ratio of the gearing is such that the brush roller is driven at an overspeed condition relative to the fountain roller.

Abstract: A plurality of circumferentially extending mounting recesses are formed in a cylinder assembly and arcuate saddle members having marking means, such as print type, on their outside surface are mounted in the recesses. Each saddle member has a locking recess formed in its inside surface with a pair of spaced apart, flexible locking wires extending therethrough. Mounting studs having a mounting head with a relatively narrow neck portion are affixed to the cylinder within the mounting recesses. The saddle members may be mounted within the mounting recesses by snap-on engagement of the mounting head with the locking wires, and readily removed by snap-off disengagement of the head with the wires. The saddle members may thus be readily replaced and interchanged by means of the snap-on, snap-off mounting and demounting.

Abstract: A non-magnetic anti-personnel war mine, comprising a plastic body, a cap of elastic material, a retaining ring, a pan containing an explosive charge and a detonator, a firing pin plunger, a bag-shaped membrane and a firing pin plunger safety and release device. The firing pin plunger is guided in a guide socket and the bag-shaped membrane is held in the plastic body by two discs, the first disc having a maze communicating, by a centrally drilled hole, with the bag-shaped membrane. The firing pin plunger safety and release device is formed by a lever with two arms, where one arm rests against the bag-shaped membrane and the other is subjected to the force of a spring.

Abstract: Improved power and free trolley apparatus includes independent pusher and hold back dogs positively moved to an accumulate position by a counterweighted actuating lever moving to an accumulate position. The dogs, however, are self-biased, the pusher dog self-locking in its drive position, and the dogs are not interlocked with the lever. They move independently of the lever into operative position when the lever is moved into a non-actuating position and out of blocking relationship with the dogs. The actuating lever counterweight defines a trolley brake for preventing excessive trolley bounce back during accumulation. Another aspect of the invention includes a movable cam selectively raising a drive dog in a trailing trolley for switching, and permitting accumulation of trolleys through a switch zone when held in an inoperative position as when the switch zone is choked.

Abstract: A chain attachment structure interconnects the end of a chain to the takeup drum of a winch or hoist so that the chain load is applied directly to an integral part of the drum even if the chain is fully unwound. A recess extends inward from the periphery of the drum and includes a pair of spaced walls. A lug integral with one wall extends toward the opposite wall. The space between the lug and the opposite wall defines a path for inserting a chain link into the recess and over the lug. A keeper inserted into the path prevents removal of the link from the lug.

Abstract: A foldable table has a pair of top sections hinged together along mating edges and with each top section including a top panel together with a peripheral skirt. A pair of legs are pivotally mounted respectively near the outer corners of each top section and are swingable between a downwardly-projecting support position and a folded position. Adjustable ties are angled respectively between different ones of the legs and the top sections for rigidifying the legs when in the support position. Each leg is pivotally mounted to swing widthwise of the table. A plurality of struts are each angled lengthwise of the table between a portion of the leg and a corresponding portion of the related top section, each strut being respectively coupled at each end to swing with its associated leg between the support and folded positions. In addition, means are provided for locking the legs in the support position.

Abstract: An adjustable-height article of furniture, such as a table, includes a generally horizontal top member, and a pair of transversely spaced, elongated leg members each having opposite ends. The top member includes transversely spaced longitudinal elements having longitudinally extending, elongated slots formed therein. One end of each leg member has a pin secured thereto which is slidably received in a respective slot, the other end being adapted to engage a supporting surface. A pair of transversely spaced, elongated support members is provided each having opposite ends, one end of each support member being pivotally connected to the top member at a point longitudinally spaced from the slots, and a point on each support member spaced from the one end being pivotally connected to a respective leg member intermediate its ends.

Abstract: A moisture-containing viscous secondary fuel is combusted in the chamber of an industrial furnace by comminuting the secondary fuel to a particle size of 5-50 mm and propelling the particles at an initial speed of 1-10 m/sec. onto a layer of intensely burning primary fuel, such as solid refuse, coal or wood. The particles are propelled from a level at 0.5-2 m above the burning layer and in such a way that the length of their flight spans is 0.2-2 m. This insures that the particles retain moisture during travel in the combustion chamber and do not agglomerate prior and/or subsequent to contacting the burning layer of primary fuel. The rate of admission of comminuted secondary fuel is regulated in dependency on changes of temperature in the chamber, in dependency on changes of the CO.sub.2 or O.sub.2 content of combustion products and/or in dependency on variations of a parameter (e.g., length) of the burning layer of primary fuel.