Abstract: A snow plow is detachably mounted to the front of a vehicle by interlocking members extending from the snow plow and vehicle. Engageable members on the plow are fixedly positioned a predetermined distance apart. Corresponding engaging members on the vehicle are displaceable between latching and unlatching positions by an over-center linkage arrangement. A first portion of the over-center linkage is pivotally connected to the vehicle. A second portion of the over-center linkage is slidably connected to the vehicle. Actuation of a hydraulic cylinder forces the over-center linkage to move from the unlatching position, wherein the blade and vehicle are disconnected, to the latching position, wherein the blade and vehicle are detachably connected. With the over-center linkage in the latching position, a toggle pin at the center moves against an abutment to lock the position of the over-center linkage, and therefore the plow onto the vehicle.

Abstract: An ironing installation possessing an ironing machine having two hollow rolls and four heating elements which can be heated by water vapor. During operation water vapor and hot air are sucked into the rolls through holes at the roll shells or jackets. This water vapor-air mixture is expelled to the surroundings through a heat exchanger. Ambient air is sucked into an air infeed line or conduit and infed through the heat exchanger into the internal compartment of a casing which at least partially encloses the rolls and heating elements. Between the aforementioned heat exchanger and an outlet opening or mouth of the air infeed line there is arranged a passage of a second heat exchanger in the air infeed line. A further passage of this second heat exchanger is connected with outlets of the four heating elements.

Abstract: A self-adhering badge assembly comprises a pair of separable substantially flat badge panels adapted to be placed in face-to-face clamping assembly alignment with a selected area of an article of clothing clamped between the panels and thereby supporting the badge assembly in place on the article of clothing. Each of the panels has a similar substantially flat core comprising magnetic material, such as magnetic tape providing N and S poles at opposite sides of the panel, with the poles of one of the panels in complementary orientation relative to the poles of the other of the panels. The core of each of the panels may be enclosed in a respective laminated plastic film jacket. The outer face of the outer panel has indicia display means. The core of each panel may comprise a laminate of the magnetic material and a rigid ferromagnetic core plate.

Abstract: A medical record card wherein a supporting card contains a microfilm portion having indicia visible to the human eye coded for particular chronic conditions which effect emergency treatment and having indicia visible by use of a microfilm reader which detail the medical history and identification data of the patient. The supporting card contains the code for the indicia which alert medical personnel to chronic conditions and, in addition, contains some important identification data about the patient and about the type and use of the medical record card.

Abstract: A sign structure which may be supported from aircraft, and especially helicopters. The structure is comprised of three distinct sections which may be compactly transported and then easily assembled and connected around the landing gear on the underside of the aircraft. The structure provides an aerodynamically stable frame which may be supported in a direction transverse to the longitudinal axis of a helicopter. Novel electrically controlled light assemblies are attached in a rectangular matrix on the structure for displaying a desired illuminated message.

Abstract: A rotary type index in which a multiplicity of information containing cards are arranged around a cylindrical drum and the drum is rotated to display information-containing surfaces of the cards in a viewing window is provided with a mechanism for causing a plurality of the information cards to be brought into position with a single selection key. This is as distinguished from the conventional drum type machine in which the number of selection switches equals the number of information cards.

Abstract: A miniaturized housing or display device including at least one electric circuit adapted to be connected to an electric current supply. The electric circuit includes at least one switch. The housing further is adapted to receive a mechanical alarm clock that has a movement winder and an alarm winder. A counterweight is attached to hang from each of the winders such that each of the counterweights abuts against a corresponding switch in each of the circuits when the mechanical alarm clock is inserted in the compartment and the counterweights descend as a result of the movement of each of the winders.

Abstract: A display heading for notions is particularly designed for use with a perforated board support that is utilized to merchandise a plurality of notions in sets of common series or groups. The notions display heading is made of plastic with rear-surface fasteners having hook like elements that project through selected apertures in the perforated board support.

Abstract: A pistol is disclosed that may be used by either right or left handed individuals. A spring biased U-shaped latch is located in the pistol handle and may be reversed in position without any special skills or tools. In either position the latch temporarily blocks the removal of the magazine. A force exerted on the latch in opposition to the biasing force permits removal and reversal of the latch.

Abstract: Apparatus for adjusting the stress in cartridge magazine springs which are arranged for such adjustment. The magazines are stored with the springs in a non-stressed condition. When use of the magazine is imminent, the springs are adjusted to a stressed condition. Disclosed hereinafter is power-driven and hand-operated apparatus to accomplish the adjustment. The apparatus may be mounted on a firearm, a magazine carrying rack, a vehicle, a boat, an aircraft, or any other suitable base.

Abstract: A signaling fishing stand holds a conventional fishing pole or rod and provides either an audible or visual signal when a fish strikes. The stand has a pointed support which can be made to engage in the ground or with folding legs to hold up the stand and may also provide a tackle box for holding the fisherman's gear.

Abstract: An indicator assembly for attachment to a fishing rod, which assembly gives a positive, visual indication of a fish bite. The assembly, which may be semi-permanently or permanently mounted on a standard fishing rod, does not in its first, stored position, interfere with the normal use of the rod, being mounted thereon by means which permit conventional use of the rod. The assembly may be placed into use by merely unhooking a weight, which is carried by the mounting means and through which the fishing line is trained, permitting the weight to move, by gravity, from its first position, to a second, use position, spaced from the rod and whereby a portion of the fishing line is drawn away from the rod, the weight, in said second position, being shiftable in response to the bite of a fish on the line, to thereby visually signal said bite.

Abstract: An animal trap comprising a first frame member made of strong metal rod, generally rectangular in shape and defining a striker bar and an anvil bar connected by side bars, said frame member also having extending bars fixedly connected to the frame at the junction points of the anvil bars and the side bars, extending at a slight angle to the side bars, and ending in end connections, a second frame member similar to the first having similar extending bars ending in end connections, said first and second frame members connected together at the end connections such that their side bars pass each other in close proximity defining X-shaped structures at each end of the trap and such that relative motion may occur from an upper "set" position where the two striker bars lie close to each other to a lower "sprung" position where each striker bar approaches closely to the anvil bar of the other frame member, a metal rod spring device formed of one or more spring coils connected by arms to two rings, said rings encircli

Abstract: An artificial bait for use with a novel combined fish lure and bait holder is disclosed. The bait holder is formed of a strip of resilient spring-like material folded intermediate its length to provide two laterally spaced side legs adapted to clamp and hold the a bait inserted therebetween. A flat plate having two slots therein at one end receives the respective laterally spaced side legs of the bait holder therethrough. As the plate is moved along the length of the side legs from the fold thereof the side legs are moved toward each other to clamp and hold the bait. The combined lure, bait holder and bait rotates as it is pulled through the water. A length of fish line extends through an opening along the mid-line of the plate. The fish line has a fastening end for attaching to a fishline and a hook end provided with hook means.

Abstract: A toy power tool is disclosed which includes the provision of an external housing in the shape of a power tool including a handle portion for grasping by the user. A sounding device is mounted within the housing and produces an audible signal simulating the sound of a power tool. The sounding device includes a flywheel, pullstring, and a wafer-type leaf spring movable into engagement with a sounding gear to produce the audible sounds. A blade guard is biased by a spring outwardly with respect to the housing so that as the housing is placed in engagement with a work piece and moved relative thereto, the blade guard moves into the housing. A cam on the blade guard engages a wafer and moves it into contact with the sounding gear to cause an audible signal to be produced.

Abstract: A toy having a pivotable component in the form of a construction wheel loader having a shovel, the toy including a manually actuable handle cocking a spring coupled to a slidable member having a rack portion for operating the shovel. Movement of the slidable member during cocking of the handle simultaneously moves a coupler connected to a piston slidable axially within a stationary closed ended cylinder. The piston has a minute aperture in the face thereof with a larger aperture in the skirt thereof with the apertures being on opposite sides of the piston seal. A locking lever coacts with the coupler for retaining the parts in the powered position against the force of the spring. Manual release of the locking lever permits the spring to urge against the slidable member with the two apertures in the piston providing speed regulation during movement of the piston into the cylinder for moving the slidable member gradually.

Abstract: The present invention is directed to a mobile toy assembly capable of ejecting toy subcomponents by air pressure. Preferably the mobile toy assembly has a simulated configuration of a rocket ship with an upper portion being simulated as a fuselage while also being the external surface of a plunger that forms part of a bellows assembly for generating air pressure. The nose section of the rocket ship can be bigurcated to permit the propulsion of a small vehicle member while rocket pods on each of the side wings can support toy rocket projectiles. A control knob on the surface of the fuselage can selectively direct the air pressure to a particular toy subcomponent to be propelled.

Abstract: A mechanical toy which has a seemingly random movement of both its extendable parts and its motion is described. The toy has a base to which is attached several extendable members which can be pushed into the toy by the child to a retractable position. The extendable members are held in the retractable position by a series of independently acting holding members. The toy includes a button which is positioned so that a child may easily push it. On depression of the button one, several or all of the extendable members may be released from the retracted position allowing them to extend out of the toy into an extended position. Concurrently the propulsion mechanism of the toy may or may not also be activated causing the toy to move along the surface on which it is set. The propulsion mechanism is energized by the child mechanically depressing one of the extensions into its retracted position.

Abstract: A flexible doll having a normal form defined by a molded elastic skin and viscous liquid filler and a separate molded head, and which will repeatedly return to its normal form after stretching and deforming of its body parts, is provided with a closure means and head mounting which is a cylindrical member having a large diameter filling passage, and external circumferential flanges spaced along its length. Two of the flanges provide a recess for clamping the doll skin thereto in sealed relationship. End flanges on the cylindrical member coact with a cylindrical bore and flange on the doll head to support it in a manner to be erect and rotatable with respect to the doll body. A plug is provided for sealingly closing the filler passage. The plug is apertured so that the doll body may be squeezed to remove all air therefrom prior to closing the aperture.

Abstract: A toy space gun comprising a hollow chamber and an elongate hollow cylindrical barrel extending therefrom, both of opaque molded plastic construction. A strobe unit including a strobe lamp is responsive to an operator trigger for generating a high intensity light flash of short duration. The lamp is mounted at the inner barrel end by a concave reflector which cooperates with a reflective internal surface in the barrel for projecting a major portion of the light flash through the barrel in a condensed pattern.

Abstract: Process and apparatus for the production of algae biopolymer employing a first stage for the growth of algae and a second stage for biopolymer production. In the first stage, growth of algae biomass in a culture medium is accomplished by operating the first stage in a continuous mode in which fresh nitrogen-containing nutrient medium is supplied to the culture. Concomitantly with the supply of fresh nutrient medium to the culture in the first stage, a portion of the culture medium is transferred from the first stage to the second stage in which the supply of nitrogen is limited. A nitrogen deficiency is created in the second stage to shift the culture to a senescent phase to enhance biopolymer production. The growth phase is carried out in a first stage reaction chamber which is connected to a plurality of second stage reaction chambers in parallel with one another.

Abstract: A seedling tray assembly and greenhouse which includes a base, a sheet of embossed material in said base and spaced from the bottom thereof, a seedling grid resting on said embossed material and a deeply dished cover overlying said base and seedling grid.

Abstract: A receptacle having an imperforate bottom has a perforated, horizontal wall spaced upwardly from the bottom and dividing the receptacle into upper and lower compartments. Tubes project through the perforated wall and extend upwardly above the upper edge of the receptacle and downwardly to the bottom of said receptacle. Lower end portions of the tubes below the horizontal wall are also perforated. The upper compartment is adapted to receive soil and the lower compartment receives excess water which evaporates through the tubes and keeps the soil moist.

Abstract: A self-watering, appliance for a potted plant, the device including an earth-filled, plant pot placed above a vessel of water, a downwardly tubular neck on the bottom of the pot extending into the water, a quantity of spagnum moss stuffed into the tubular neck providing capillary action for water to be drawn up to plant roots in the earth, and valve means on the extension for controlling amount of water drawn up into the pot.

Abstract: A first tapered container is arranged to hold a supply of water and supports a second tapered container which contains soil and one or more plants. A wick extends up through an aperture in a lower portion of the second container and is arranged to feed water from the water supply in the first container to a plant in soil in the second container. The assembly may also include a third container which seats in inverted relation on the second conveyor. The containers used are preferably transparent and in one arrangement the first and third containers are of like size but the second container is of a wider taper to provide the selected wedging engagement of the three containers. In another arrangement the second container has an enlarged upper portion forming a downwardly facing shoulder for seated engagement on the first container. Also, the second container may have a top flange for seated engagement on the first container and furthermore may include a recess to receive the bottom edge of the third container.

Abstract: An improved prefabricated door frame construction is disclosed. A frame member is provided which includes a central web spanning the width of the wall and a pair of side flanges which fit over the edges of the wall circumscribing the opening. The web includes a pair of grooves opening in a common transverse direction, one of which is near the center of the web and the other near one edge. Hinge members are provided each having a hinge plate which includes a pair of elongate tongues which engage and mate with the respective grooves of the frame member. Cover plate sections are provided, each of which also has a pair of elongate tongues which engage with the respective grooves. The cover plate sections are cut to fit the gaps between the hinge plates and the ends of the frame member to provide a finished structure.

Abstract: Apparatus for mounting a thin flexible grinding wheel to allow accurate cutting of kerfs therewith. A method of precision assembly of the apparatus is also disclosed.

Abstract: An apparatus for cutting material or grooving concrete has a housing including a curved top for partially accommodating one or more circular saw blades. The housing has a bottom having an opening permitting partial protrusion of the saw blade into cutting engagement with the material or concrete to be cut or grooved. For manual propulsion of the housing along such material or concrete, a curved handle is located on the housing top and has identically dimensioned first and second handle portions extending in parallel to the partially accommodated and protruding saw blade or blades in opposite directions from a central location on the housing top situated opposite the mentioned bottom. The partially accommodated and protruding saw blade is rotated and the housing including the mentioned bottom is maintained in spaced relationship to the material to be cut or concrete to be grooved during operation of the saw blade or blades.

Abstract: An etched metal abrasive formed from a laminated sheet of steel having a top layer of high carbon steel and a base layer of low carbon steel.

Abstract: An adjustable manhole cover support structure including a peripheral frame adapted for placement in the opening of a manhole housing, a peripheral manhole adjusting ring portion disposed on the frame, and a lateral support ring portion disposed on the adjusting ring. The adjusting ring portion has a peripheral inner seat for receiving the manhole cover. The lateral support ring portion is formed as a unit with the adjusting ring portion and projects generally rigidly upwardly therefrom to restrain the adjusted and elevated manhole cover against lateral movement relative to the frame.

Abstract: A merchandising kiosk has a base shell enclosing a working area for a salesperson. The base shell has display cabinets, the top of which form a continuous counter about the working area. There is an entrance door in the base shell. A canopy that can be raised and lowered mates with the counter in the canopy's lowered position to seal the interior of the kiosk against theft and vandalism. The counter top above the door has a stop that engages the door and prevents it from being opened when the canopy is in the lowered secured position.The canopy for reasons of strength and stability are supported by at least two spaced apart posts within the central portion of the working area which posts are extensible from the closed to the open position. The canopy is raised and lowered preferably by a hydraulic piston driven by an electric pump. The hydraulic machinery and the posts are encased in a central vertical display unit.

Abstract: The window panes delimit a leak-tight air chamber and a narrow leak-tight space which can be filled with immiscible liquids having different optical indices supplied from a bottom reservoir and a top reservoir housed within the window frame. The top reservoir has decompression vents and the bottom reservoir is connected to a pump for injecting one of the fluids through a distribution chamber into the leak-tight space. The window serves to ensure heat insulation, to store and redistribute heat and to provide shielding against radioactive radiation.

Abstract: Building components are disclosed which are constructed at a factory and assembled on site. The components include walls employing concrete reinforced steel columns attached to lightweight insulation. The insulation is secured to the columns by use of a wire mesh disposed between columns. Concrete reinforced steel headers are also provided. A roof includes sheet metal decking provided with lightweight insulation and reinforced for rigidity.

Abstract: A wall system comprised of panels made of material dimensionally reactive to moisture content changes such as may be used for the sports of racquetball or squash in which panels are joined to vertical support members and to horizontal steel stress straps so as to control shrinkage and expansion forces within the panels due to changes in moisture content of the panels.

Abstract: This invention concerns a set of assembly elements consisting of assembly rails fitted to engage each other along a nodal line, and which may be intended for the assembly of sheet elements; the individual rail may be attached along the edge of each sheet element by its underside by generally known means, such as screws, glue or tongued and grooved joints; the cross-section of the individual assembly rail consisting of a basic part and a hook-shaped part; at least the basic parts, duly assembled, will bear against each other, preferably along radial surfaces.

Abstract: A reinforced building component for buildings and like structures having a reinforcement consisting of a number of juxtaposed wires bent in zigzag and an insulation preferably consisting of insulating material that is foamed at the reinforcement. The central parts of the bent wires are located within the building component while the crests of the wires extend outside the two sides of the slab so that clamps are formed as integral parts of the reinforcement wires at both sides of the slab.

Abstract: A rigid building component such as a door, table top or the like, is formed of coarse wooden particles mixed with adhesive, and a solid wooden edge frame, positioned between a pair of damp, substantially parallel, cellulosic fiber webs. A heated press is employed to compact the combination, particularly between the edge frame and the cellulosic fiber webs where the coarse wooden particles are greatly compressed to provide a durable edge. Under the heat and pressure applied in the press the particles are consolidated into a solid structure, while the damp cellulosic fiber webs are converted to tough exterior skins bonded to the coarse wooden particles. The sides of the rigid building component are suitably deeply embossed to provide a decorative paneled appearance.

Abstract: A prefabricated wall panel is disclosed having an insulating core (10) and an outer facing sheet (11) on each side thereof. Along one lateral side edge the facing sheets are spaced from the core material (10) which core material extends as a lateral projection (13) along the one edge. Along the opposite lateral edge of the wall panel a connecting member (15) is provided having a pair of outer laterally extending tongues (14, 14) about each of which is wrapped the adjacent edge of the adjacent facing sheet (11). A pair of inner tongues (19, 19) also extend laterally from the panel and spaced from the outer tongues (14, 14) to which they are connected by narrow webs (18, 18). A broader web (16) extends between the inner tongues. When assembled the free edges (12, 12) of the facing sheets (11, 11) extend into the spaces (21, 21) between the outer (14, 14) and inner (19, 19) outwardly extending tongues and the projection (13) of the core (10) extends into the space between the inner tongues (19, 19).

Abstract: Apparatus for facilitating bricklaying is disclosed in which bricks positioned on a mortar bed on a previously laid course are aligned relatively to the previously laid course by means of parallel members provided with means contacting the side faces of the bricks, which members are progressively moved longitudinally of the course as it is laid. Mortar may be dispensed automatically onto the course being laid as the apparatus is moved along the course.

Abstract: Apparatus and method for closing and sealing lined taper top cartons wherein the cartons are advanced in a path of travel with their liner mouths open, the end walls of said carton and the opposite ends of the liner being simultaneously deflected inwardly and the front and rear carton walls and the opposite sides of the liner mouth concurrently displaced toward each other to juxtapose the upper edges of the front and rear walls with the liner mouth flattened therebetween, the flattened liner mouth then folded upon itself to form a double thickness mouth, the folded liner mouth and an end closure flap hinged to the carton rear wall then being simultaneously folded over the upper edge of the carton front wall and the folded closure flap secured to the front wall of the carton.

Abstract: The invention provides a low profile, compact row crop attachment which eliminates the use of crop conveyors in the form of chains with crop-engaging extensions attached thereto, such conveyors being subject to fast wear and being relatively expensive to replace. The chain type conveyors are replaced by a plurality of rotary means which are staggered transversely of the attachment relative to each other and positioned along side and outside an associated stalkway defined by a pair of spaced apart members. Conveyor means extend from the rotary means from outside into the associated stalkway so as, in operation, to convey crop along that stalkway.

Abstract: A cutter bar has spaced apart guards projecting forwardly therefrom with shearing edges cooperating with the sickle knife elements secured to two aligned sickle bars. An extension bar is secured to the inboard end of one of the sickle bars which extends in overlying relation to the inboard end of the other sickle bar. The extension carries several inverted knife elements which cooperate with upper shear edges on special guards at the inboard ends of the sickle bars.

Abstract: A pivotal striker rod picking device carried by a row harvesting machine, the picking device having opposed striker rod holders each pivoting about a vertical axis, one on each side of the centerline of the machine, the striker rod holders each having horizontal striker rods mounted thereon. A cyclically operable drive means is connected to each striker rod holder to oscillate each of the striker rods horizontally through a constant amount of arcuate stroke, inwardly towards and outwardly away from the machine centerline. The force of each striker rod against an object in its path of inward movement is sensed and used to shift the striker rod stroke horizontally relative to the machine centerline. A first control shifts the strokes in the same direction to maintain an equal amount of striker rod force on both sides of an object which is off-center relative to the machine.

Abstract: An agricultural harvesting machine comprises a frame, a crop pick-up mechanism mounted on the frame for flotational movement with respect thereto, and counterbalancing means operable to counterbalance at least a portion of the weight of the pick-up mechanism. The counterbalancing means comprise a combined sheave structure rotatably mounted on the frame and having a first sheave coaxial with the axis of rotation, and a second sheave connected for rotational movement with the first sheave and having a nonuniform radius relative to the axis of rotation, resilient means coupled between the frame and the sheave structure and first and second interconnecting means interconnecting the combined sheave structure with the pick-up means and the resilient means respectively.

Abstract: A single-twist wire stranding or bunching machine having a reciprocating flyer traversing the length of a take-up reel and rotating coaxially with respect thereto, such take-up reel being mounted within pivoting means to facilitate easy removal of the reel after it is fully wound with wire. The invented machine comprises electro-mechanical means for automatically controlling the uniformity of the lay length of the twisted wire by correcting for changes in the velocity of the wire being fed into the machine due to wire build-up on the reel or to reversals of the traversing flyer. Additional control means are also disclosed for automatically controlling the points at which the flyer, in its reciprocating motion, reverses direction, thereby minimizing wire accumulations or recesses at the end flanges of the reel.

Abstract: A yarn take-up and supply mechanism for selected intermittent use with textile machines, such as a two-for-one twister, utilizing yarn, such as during a threading-up operation of the machine, characterized by a construction for receiving a free end of yarn from the textile machine, taking-up a loop of a predetermined length of the yarn and completely releasing the free end and taken-up length of yarn to the textile machine in a substantially tension-free condition.

Abstract: An electronic watch having a time counter circuit for developing a count representative of present time, a second time counter circuit for developing a count representative of time, and a chronograph counter circuit for developing a count representative of elapsed time. A predetermined time is stored in a memory circuit and the contents of the second time counter and the memory circuit are compared by a coincidence detecting circuit. When coincidence occurs a sound generating circuit is enabled for developing sound pulses to represent coincidence. A display visually displays time, and a display switching circuit switches between the present time counter, the memory circuit and the chronograph counter for applying the contents of a selected one thereof in order to visually display present time, the predetermined time and a time interval determined by the chronograph counter. A control circuit is effective for controlling the display switching circuit and operating the watch in different modes.

Abstract: An arrangement for regulating supercharger air pressure in a combustion engine operated with exhaust gas supercharge which equipped with an exhaust gas turbosupercharger, consisting of a supercharger and an exhaust gas turbine. The regulating device is a valve controlling an exhaust gas bypass to the exhaust gas turbine. The valve has a pressure unit divided by a diaphragm into two chambers. One side of the diaphragm is charged with supercharger air pressure, and the other side is loaded by a spring. The two chambers are connected by a calibrated opening in the diaphragm. Another valve connects the chamber holding the spring to the atmosphere and has the form of a nonreturn ball valve. The preloading of the spring of the nonreturn ball valve may be adjustable.

Abstract: A gravity motor utilizes a heat expansion mechanism comprising a frame, a rotational shaft supported by the frame, a drive gear connected to the rotational shaft, the drive gear having a plurality of teeth around the outer periphery thereof, a plurality of drive bars, the drive bars at one end thereof being pivotally secured to the drive gear around the circumference of the drive gear to permit pivoting of the drive bars within a predetermined range limited by two teeth of the drive gear and the other end of each of the drive bars extending radially outwardly therefrom, and a plurality of expansion means, at least one expansion means being respectively situated between the drive bars to change the distance between the drive bars, whereby when one or more expansion means is actuated continuously on one side of the motor by heating or cooling the expansion means, the motor becomes successively unbalanced between the two sides to thereby move continuously.

Abstract: A high-temperature combustor for burning low-BTU coal gas in a gas turbine is disclosed. The combustor includes several separately removable combustion chambers each having an annular sectoral cross section and a double-walled construction permitting separation of stresses due to pressure forces and stresses due to thermal effects. Arrangements are described for air-cooling each combustion chamber using countercurrent convective cooling flow between an outer shell wall and an inner liner wall and using film cooling flow through liner panel grooves and along the inner liner wall surface, and for admitting all coolant flow to the gas path within the inner liner wall. Also described are systems for supplying coal gas, combustion air, and dilution air to the combustion zone, and a liquid fuel nozzle for use during low-load operation. The disclosed combustor is fully air-cooled, requires no transition section to interface with a turbine nozzle, and is operable at firing temperatures of up to 3000.degree. F.