Abstract: A door for a high-temperature oven is disclosed that includes an external door and an internal door which are thermally isolated from one another. The internal door is held at a distance in a frame of the external door by internal door carriers. The internal door carriers are in the form of lugs that are integrally formed on the internal door by punching out the metal sheet. The lugs engage with tabs in the form of punched-out recessed that are disposed on the frame of the external door.

Abstract: A natural draft furnace has a firebox inside a water box with fire tubes containing water running through the firebox, flues from the firebox running through the water box, a front/fire door of double wall construction to preheat entering air, a damper in the fire door and a toggle-lock latching system on the fire door that provides uniform sealing pressure around the door.

Abstract: An apparatus having at least one environmentally controllable chamber with an opening includes a chamber opening covering having at least one expandable portion that is expandable into the chamber when the covering is in a closed position. A chamber opening covering actuator enables movement of the covering between at least one open position and a closed position relative to the opening. The open position of the chamber opening covering allows at least partial access to the chamber through the opening.

Abstract: A waste incinerator including separate burning-, blower-, chimney- and ash-receiving chambers. A suction-discharge port is provided in a wall between the burning chamber and the chimney chamber for discharging gases from the burning chamber through a chimney to the atmosphere. The chimney extends from the chimney chamber for discharging gases to the atmosphere. The chimney receives an air feed pipe from the blower and an ignition sleeve extends into the chimney for burning unconsumed waste gas. A vibrator vibrates an ash receiver in the ash receiving chamber, and a drying chamber may be provided for drying high moisture garbage by combustion gases from the burning chamber.

Abstract: Apparatus for selectively permitting access to the interior of a boiler and selectively closing off access to the interior of the boiler which includes a frame, a support plate, and a hinge. The hinge couples the support plate and the frame and allows pivotal movement of the support plate with respect to the frame. The apparatus also includes a door plate; and apparatus for coupling the support plate to the door plate. In some forms of the invention the apparatus for coupling comprises a plurality of studs fixed to one of the plates in generally parallel spaced relationship. The other of the plates may include a plurality of holes disposed in generally registered relationship to the studs and dimensioned for loose fitting engagement with the studs. The apparatus may also include apparatus for latching the support plate to the frame to prevent pivotal movement thereof with respect to the frame. The apparatus may also include apparatus for urging the door plate away from the support plate toward the frame.

Abstract: Refractory door jamb assemblies for high temperature furnaces. The door jamb assemblies include alternating courses of refractory brick shapes, selected ones of which are fitted with apertures that are aligned as by drilling, when the bricks are installed. One or more steel rods are inserted through the aligned apertures to fasten and retain the bricks in the desired position so as to cooperatively act with the bricks and prevent them from moving when subjected to thermal and mechanical forces encountered in use.

Abstract: A guillotine-style door closure system for a furnace comprises a furnace opening with a door frame on a vertical side of the furnace; a furnace door adapted to mate with the frame; a left closing chain mounted, at one end, to the vertical side of the furnace approximate the left jamb and the lintel of the frame, and mounted, at its other end, to a left pin extending from the furnace door approximate the left vertical side of the door, below the vertical centerline of the door and distal from the rear vertical side of the door; and a right closing chain mounted, at one end, to the vertical side of the furnace approximate the right jamb and lintel of the frame, and mounted, at its other end, to a right pin extending from the furnace door approximate the right vertical side, below the vertical centerline and distal from the rear vertical side of the door.

Abstract: A coke oven door comprises a door frame, a plate mounted so as to be freely movable relative to the door frame within limits and a seal operatively mounted to the plate and positioned around the periphery of the frame for effecting sealing against the jamb of a coke oven. In a preferred form, the door comprises a first plate mounted so as to be freely movable relative to the door frame within limits and a second plate mounted to the first plate, having a seal mounted around the periphery thereof and having refractory plugs mounted thereto. Force applying members are mounted around the periphery of the door frame and are selectively adjustable to contact and move the first plate. Force applying members are mounted around the periphery of the first plate and are selectively adjustable to contact and move the seal. Angle sections mounted to the door frame and retainer clips mounted to the first plate cooperate to limit movement of the first plate.

Abstract: Method for the gas sealing manufacture of a door frame of a coke oven battery which battery comprises a refractory structure with an armor plate connected to it onto which the door frame is fitted characterized by the following steps:measuring the profile of the surface of the armor plate at the position where it faces the door frame in its mounted state;fitting a profile to one side of the door frame which in its mounted state faces the armor plate, corresponding to the profile of the surface of that armor plate measured in the previous step, in such a way that in its mounted state the door frame rests essentially against the armor plate;placing the door frame thus adapted against the armor plate.

Abstract: A coke oven door assembly has first abutting vertically aligned refractory cold face layers, second abutting vertically aligned refractory hot face layers spaced therefrom, and an integral one piece uppermost refractory section having a bottom, a horizontally extending top portion, and first and second downwardly depending leg portions with an interconnecting web. The interconnecting web is spaced from the side walls of the uppermost refractory section between the leg portions and extends from the horizontally extending portion at least partially downwardly towards the bottom of the uppermost refractory section.

Abstract: A coke-oven door assembly has a rigid door, a mounting block adjacent the door, a door-plug backing plate fixed to the mounting block, and a membrane having a center portion between the backing and mounting blocks and a periphery juxtaposed with a coke-oven door jamb. A blade-type seal is carried on the periphery and engageable with the door jamb and spring units on the door press the seal against the door jamb. A plurality of bolts threaded into the mounting block extend generally perpendicularly outward from the membrane and are each formed with an abutment shoulder directed outward away from the membrane. A plurality of sleeves threaded into the door slidably receive the bolts and are each formed with an abutment shoulder directed inward toward and engageable with the respective bolt abutment so that the mounting block can move perpendicular to the membrane relative to the door with separation of each bolt abutment from the respective sleeve abutment.

Abstract: An apparatus for covering the hopper of a material melting and dispensing apparatus is disclosed. The apparatus includes a cover lid engageable with a cover base. A hinge arrangement allows pivoting between the cover lid and cover base, and also allows for non-destructive removal of the cover lid from the cover base upon over-extension of the cover lid in the open direction.

Abstract: A coke-oven door seal and sealing system wherein the coke-oven door seal comprises a sealing arm in angular relation with a door jamb surface, said sealing arm being engagable with said door jamb surface at a knife edge, and said sealing arm protruding beyond said knife edge and away from said door jamb surface creating a reinforcing and ventilating rib for cooling said knife edge which is capable of supporting a secondary sealing means. The sealing system of the present invention comprises a coke-oven door seal, including a sealing arm in angular relation with a door jamb surface, said sealing arm protruding beyond the knife edge at which said sealing arm engages said door jamb surface and a pivotable plunger system which comprises a standard plunger connected to a plunger extension which consists of a pad and a ball joint or other swivel or rocking means.

Abstract: A semiconductor processor including an enclosure with an access opening. A door assembly is supported for translational movement between aligned and displaced positions relative to the access opening. The door assembly has a main part, and an extension part which telescopically moves toward and away from the access opening. A bellows is provided between the main and extension parts. The closed door is sealed by a first face seal and a second expandable seal. A liquids trap is provided to prevent outward escape of liquids from the access opening. A drain removes liquid collected in the trap.

Abstract: A coke oven door, which includes a metal frame, means for latching the door in a closed position, a sealing member extending around the perimeter of the frame having forward edges adapted to contact a sealing surface on a coking chamber door jamb for effecting a continuous seal. The coke oven battery also having at least one attached protrusion proximate the coking chamber extending outwardly from the battery, such as a latch or a guide bar, said door comprising a door plug passing with clearance and fitting into the coke oven, said plug having an inner surface that forms an interior end wall of the coke oven wherein a first plane is formed by the perimeter of said inner surface.

Abstract: A semiconductor processor including an enclosure with an access opening. A door assembly is supported for translational movement between aligned and displaced positions relative to the access opening. The door assembly has a main part, and an extension part which telescopically moves toward and away from the access opening. A bellows is provided between the main and extension parts. The closed door is sealed by a first face seal and a second expandable seal. A liquids trap is provided to prevent outward escape of liquids from the access opening. A drain removes liquid collected in the trap.

Abstract: Coke oven doors and more particularly coke oven doors having a unique and novel spring arrangement for maintaining the knife edge of the sealing element in sealed relation to the face of the coke oven door jamb, an improved sealing arrangement at the leveler door, scalloped cutouts in the main frame components to increase efficiency of heat dissipation, a manual adjustment structure incorporated into the main door frame to provide more positive and controlled flexibility of the main door frame and the provision of cuts in the door frame and the manner in which the diaphragm plate is connected to the refractory to provide space for the door frame to flex when adjustments are made.

Abstract: A door assembly for semiconductor processing equipment used to treat semiconductor substrates, wafers, photomasks, data disks, and other units. The door assembly is mounted to the front wall of a semiconductor processor enclosure having an access opening by means of a pair of guide rods and corresponding sliding bushings connected to the door which encircle the rods to allow movement of the door along the guide rods. A magnetic rodless piston mounted in an actuator bushing block which is magnetically coupled to an actuator bushing block moves the door assembly along the guide rods. The door assembly telescopically moves toward and away from the access opening to allow units to be installed into and removed from the enclosure, and to close the access opening. A window including an expandable seal is secured to an extension piece of the telescoping door assembly to seal between the door assembly and the access opening.

Abstract: A door assembly for an air lock of a waste processing system comprising a vertical sliding door member having a perimeter entirely supported when the sliding door member is in a closed position and is sealed by a selectively inflatable gasket assembly located along the perimeter. The sliding door member is supported by inner and outer panels separated by a rectangular spacer gasket, wherein the inner and outer panels each contain a rectangular opening having a perimeter for receiving the inflatable gasket assembly. The inflatable gasket assembly includes a retainer frame and a rectangular inflatable seal element. The door assembly is opened and closed by including a pair of vertical tracks located between the inner and outer panels for receiving vertically extending ribs from the sliding door member.

Abstract: The present invention has been devised to obtain a metallurgical effect by introducing refining gas into a molten metal in a metallurgical vessel and stirring the molten metal sufficiently by convection, and to improve durability of one nozzle or a few nozzles for introducing the refining gas. At a predetermined position of a furnace bottom onto which a ramming mass is provided, a few cylindrical refractory sleeves are disposed close to the upper face of the furnace bottom from the lower portion thereof. In each cylindrical refractory sleeve a gas introducing nozzle, which introduces the refining gas, is disposed in such a manner that it can be drawn out downwardly for replacement.

Abstract: A remotely operable vessel cover assembly used with a vessel. The cover assembly has a mounting rim secured to the vessel surrounding a circular opening and a circular cover to fit against the mounting rim. A force ring having a plurality of openings is attached to the cover. Connector pins are attached to and extend from the mounting rim and through a plurality of holes in the cover and the force ring. A lock ring is rotatably attached to the force ring and locks the extending heads of the connector pins to the force ring to restrain the cover in an initial position. A force actuator, disposed between the force ring and the cover, expands under fluid pressure to react against the cover forcing the cover against the mounting rim. Upper and lower ramps are connected to the periphery of the cover and a ramp ring respectively. The ramp ring, rotatably supported between the force ring and the cover, has lower ramps positioned to match upper ramps on the cover.

Abstract: An improved apparatus is described for the closure of the open end of a conventional tube furnace used in the treatment of semiconductor devices manufactured in the integrated circuit industry. The apparatus consists primarily of an adjustable fixed weight on one end of a lever arm and a roller bearing means on the other end, said lever arm being supported by a fulcrum structure which is adjustably attached to the movable track which transports the semiconductor devices into and out of the furnace. The roller bearing end of the lever arm rests with constant pressure against the rear face of the furnace door when the door is closed and held against the opening in the tube furnace. The design eliminates the need for springs and is insensitive to the environment.

Abstract: A heat treatment apparatus for vacuum and high pressure operation includes a container within a vessel separated by thermal insulation. The vessel has a door for access to the container. Both the container and thermal insulation have separate doors mounted on a common frame pivotally mounted inwardly of the vessel door. The container door can be opened and closed from otuside the vessel when the thermal insulation and vessel doors are closed. Normally the container door is kept open in case of failure of the closing mechanism or in the event of a power failure.

Abstract: A slide gate closure is provided for bottom discharge bins which are used for storing and transporting large quantities of dry chemicals. The slide gate includes screw means attached to the gate whereby the contents of the container may be fully or partially removed through a discharge opening by rotation of the screw means. Wedges are provided on and about the gate to form a six point contact between the slide gate and a sealing gasket.

Abstract: This invention comprises a door for gas-tight sealing engagement in an access opening in environments involving high temperature. In one embodiment, the door is a boiler access door provided through a waterwall in a boiler, and includes a tapered insulation plug for sealing engagement in a tapered opening in the waterwall. In a preferred embodiment, the tapered sides are stepped and the insulation comprises multiple layers, which may be of different grades of insulation material. The stepped insulation defines a plurality of linearly aligned contact surfaces for engagement with a plurality of cooling tubes defining the sides of the access opening. This contact with the cooling tubes not only impede flow of hot gas between the door and frame, protecting the seal and the outer portions of the door from the heat, but also result in cooling of the insulation plug.

Abstract: A rotary isolation door for use in a conduit extending between an auger feeder and an incinerator which opens to allow the auger feeder to convey material to the incinerator and closes to prevent burn-back of material in the conduit from the incinerator. The door includes a first housing plate having a first opening offset from its center, An annular spacer-plate attached to the first housing plate, and a second housing plate having a second opening offset from its center and attached to the side of the spacer plate opposite the first housing plate. The first, second and spacer plates are attached to form an interior chamber within which is rotatably mounted a door plate having an offset opening such that a flow path is formed when the openings of the first and second housing plates and door plate are aligned.

Abstract: A safety door for a furnace or like apparatus is operable to open under the force of a hydraulic cylinder when the pressure under the furnace exceeds a predetermined upper limit corresponding to an abnormally high pressure caused by an explosion within the furnace or like apparatus. The safety door thereby prevents the furnace from being permanently damaged by an explosion.

Abstract: An oven with double door is disclosed formed of a rigid projecting frame which supports, through guide rods, an inner plate which is urged by springs. Closure is provided by the inner plate which slides with respect to the frame and supports a peripheral seal.

Abstract: A modular door jamb and lintel system for an industrial furnace having an access door opening. A module is provided with a pair of spaced, generally vertical door jambs of precast refractory material. A refractory lintel spans the door jambs and combines therewith to define a frame for the access opening. Hangers are provided on the lintel to facilitate transporting and installing the lintel in position at the access opening. Fasteners are provided on at least the door jambs to facilitate securing the door jambs to appropriate structural members about the access opening.

Abstract: A free hanging reheat furnace door has a main door section with modular refractory units secured to a frame in lateral rows and a detachable bottom door section formed from channels and struts which is also covered by modular refractory units. The door sections are detachably secured together with modular refractory units of each section mating together, and preferably a refractory shoe is provided that fits a recess in the lower modular units and encloses the lower channel of the bottom door section. Pairs of doors may be hung side-by-side with L-shaped refractory members secured to confronting sides of the doors to seal the gap between adjacent spaced doors.

Abstract: An ingot pusher furnace includes means for reducing heat loss from the charging and discharging ends of the furnace so as to produce a more efficient and uniform heating of the ingots. The pusher furnace includes support rails which extend between a first opening in the front wall and a second opening in the rear wall and terminates inside of the charging and discharging doors. The charging and discharging doors extend below the support rails in their closed position so as to provide a positive seal. A first rail drawbridge is arranged adjacent the charging door to facilitate movement of the ingots into the furnace enclosure. The second rail drawbridge is arranged adjacent the discharging door to facilitate movement of the ingots out of the furnace enclosure.

Abstract: An oven door assembly of a shield-type construction for vented oven doors is achieved by ceramic barrier plates which can be produced in an extrusion process and which are mounted to supports, preferably in the form of cantilever beams fixed with one end to the oven door body and bearing clamps at the other end for clamping the ceramic barrier plates. Each ceramic barrier plate is replaceable and has grooves on the upper and lower side faces to receive the clamps. The clamps are constructed for clamping the ceramic barrier plates by pressure forces acting normal to the upper and lower side faces of the ceramic plates.

Abstract: A door assembly for a high temperature oven is disclosed, including a door frame having a cavity which is at least in part wedge-shaped and having apertures through the frame with a resilient seal surrounding the aperture. A door is located within the cavity, and moves in a generally vertical direction from an open position wherein the door is out of contact with the resilient seal and is displaced from the area between the apertures to provide unimpeded passage therethrough, to a closed position wherein the wedge shape causes the door to firmly seal against the resilient seal so that the substantial escape of gases through the closed door does not occur.

Abstract: A furnace closing mechanism for industrial furnaces is composed of a furnace door that can be latched to the furnace shell and a heat-insulating door fastened to the furnace door. This heat-insulating door renders the thermal insulation of the furnace interior gastight. Loss of material caused by friction is prevented by bayonet joints. The heat-insulating door provided by leaf springs and a threaded hub is screwed onto a threaded spindle, which is mounted on the furnace door and can be operated from the outside.

Abstract: An ingot pusher furnace includes means for reducing heat loss from the charging and discharging ends of the furnace so as to produce a more efficient and uniform heating of the ingots. The pusher furnace includes support rails which extend between a first opening in the front wall and a second opening in the rear wall and terminates inside of the charging and discharging doors. The charging and discharging doors extend below the support rails in their closed position so as to provide a positive seal.

Abstract: An oven system for the continuous firing of bindered ceramic materials includes a conveyer, a burnout section, and an oven section. The burnout section burns binder out of the ceramic materials without substantial firing of the ceramic materials. The oven section fires the ceramic materials at a temperature of 800.degree. C. to 1600.degree. C. in an oxygen atmosphere. The oxygen in the oven is at a pressure of at least one-half atmosphere, so that the ceramic products are at least substantially in the oxide form and have a density of at least 98% of the theoretical density. The oven has a wedge shaped door which interacts with a wedge shaped cavity to seal the door.

Abstract: An incineration system utilizes a circular cross-section pyrolysis chamber in which waste materials are gasified. A flat cast iron hearth serves as the floor of the pyrolysis chamber and has a number of small holes which are raised above the general hearth level by a number of nipples. The bolted front head of the chamber has a vertically movable front door. When raised, the hinged door assembly may be opened by unscrewing a pair of locking mechanisms which seal the door to a vertically movable frame. Ash removal may be accomplished by partially raising the entire structure, rather than opening the door. The ash ram is rectangular, covers a substantial area of the chamber floor when extended, and utilizes a unique cable and cylinder ram moving system. An air plenum above the chamber also acts as a platform, allowing inspection and maintenance to take place on top of the chamber.

Abstract: A closure assembly for a furnace wall in which a plug member is secured to a door shell which, in turn, is pivotally mounted to the furnace wall. A plurality of anchor members are secured to the shell and extend through openings in and are secured relative to the plug member.

Abstract: A thermostatic oven having an oven body with a front opening having a door which comprises windable sheets which cover the front opening with a space therebetween to close the same and which are wound up when the front opening is to be opened.

Abstract: In a pasta dryer (1) with an insulation cladding encasing the dryer, the side parts of which cladding consist of individual convex wall elements (10) which can be braced in their edge regions against frame parts (13) of the dryer, the wall elements (10) are of convex design in the shape of a cylinder section and the associated frame parts (13) are adapted correspondingly.

Abstract: A soft landing cantilever boat loader for loading semiconductor wafer carrying boats into a furnace process tube includes a loading station having one or more loading assemblies, an automatically controlled door associated with each loading assembly for selectively closing an end of the process tube and a microcomputer based control system for controlling and coordinating process operations. The loading assemblies are of a low profile configuration and each include a boat supporting, cantilevered paddle that is mounted by a quick release mechanism on a carriage which is driven along ways by a motor. A motor speed control circuit provides closed loop motor speed using a pulse width modulated motor drive. A door operating mechanism provides movement of the door along two transverse axes to assure tight sealing of the door against the tube.

Abstract: A heating appliance having which a viewport through which combustion can be viewed incorporating a portion which is reflectorized to reflect some of the radiant heat of the burning fuel in the fire chamber back into the fire chamber to maintain high temperatures in the fire chamber for efficient combustion while reducing the temperature of the outer surface of the viewport and accordingly the likelihood of injury to persons accidentally touching the viewport and the possible damaging effects of thermal exposure and shock. The viewport is reflectorized in the preferred embodiment by a treatment which enhances the reflectivity of the transparent or translucent portion over that of transparent glass.

Abstract: The specification discloses a door for a slab-heating furnace. A series of closure members are positioned in side-by-side relationship from one side of the opening to the other. Each closure member has one or more sections pivotally connected to an adjacent section.

Abstract: A hoisting mechanism for handling the cover of an electric arc furnace comprises a pivotable gantry base and gantry arms connected thereto which extend over the furnace cover. Traverse bars overlay the gantry arms and are connected to the furnace cover by hoisting rods which pass through the gantry arms. Lifting mechanisms preferably in the form of hydraulic piston-cylinder arrangements are secured, on one end, to the gantry arms and, on the other end, to the lower side of the traverse bars. The mechanism is electrically insulated to eliminate deterioration of the equipment and the existence of electrical circuits and, in addition, the hoisting rods and the piston cylinder mechanisms are water-cooled.

Abstract: A lightweight self-sealing flexible door for closing the end of a horizontal coke oven, which door comprises an outer assembly that includes a thin flexible plate and an inner plate assembly that extends into the oven and is supported by the outer assembly. Self adjusting pressure-distributing means associated with the exterior of the flexible plate continuously exert pressure at a plurality of spaced locations adjacent the outer periphery of the flexible plate to cause it to freely flex and urge sealing means adjacent the inner periphery of the flexible plate to substantially sealingly engage the surface of the frame of the oven as the frame is caused to warp and distort by the thermal cycling that occurs during operation of the coke oven. Latching devices hold the door in position against the oven frame and apply pressure upon the pressure-distributing means.

Abstract: A structure such as a wall of a high temperature furnace door is lined with fibrous refractory insulation material which has structural fastening devices embedded therein or interleaved between planks thereof. In one embodiment, plank-like pieces of fibrous refractory material are arranged in a stack extending edgewise with respect to the wall, and sheets of expanded metal are positioned between the refractory planks and are anchored to the wall. The interleaved stack of refractory planks and expanded metal sheets are compressed such that the metal sheets become essentially embedded within the refractory material to securely grip large surface areas of the planks to hold the refractory planks in place. In preferred practice, rods extend through slots formed in the wall and connect with the expanded metal sheets to hold the sheets of expanded metal in place after the interleaved stack has been compressed.

Abstract: A seal for an access door (44) mounted on a combustion chamber of a fluid heater includes a gasket pad (56) that is sealed to the interior surface of the door (52) by adhesive material. The gasket pad is secured to the door by first applying adhesive material to the interior surface of the door and the gasket pad. Thereafter, the gasket pad is attached to the coated area on the door covered by adhesive material.

Abstract: A construction for the refractory lining member of a coke oven door is provided. The coke oven door lining includes a generally "U"-shaped frame with a castable refractory element formed therein. The frame is provided with a base portion and first and second legs which extend from the base. A series of diagonal cross-members are provided to be affixed at one end to the ends of the legs and at the other end to the central region of the base portion. The refractory member is formed from a castable refractory material and is designed to extend beyond the ends of the legs of the frame. In an alternative embodiment of the invention, the refractory member consists of a two-layer system to provide greater insulation.

Abstract: A door construction for the door frame of a coking oven having a seal comprising a sheet metal diaphragm with a perimeter flange which engages and forms a seal with respect to a sealing surface of the oven door frame. Threaded studs each have an end secured to the diaphragm and extend through holes in a rigid door plate. Nuts have threaded engagement with each stud and serve to adjustably fix each stud to the door plate whereby each stud may be adjusted to apply forces to the diaphragm in directions toward or away from the door plate.

Abstract: A portable gas forge. The forge is comprised of a housing having an insulated interior and an opening for insertion of the article to be heated such as a horseshoe or the like. The forge is resistant to blow-out by wind when used in the field and has a specially designed burner connected to the top of the housing. The burner is connected to a source of gas such as an LP gas cylinder. A gas orifice is connected to an enlarged burner pipe having a bell-shaped primary air inlet adjacent the gas orifice. A source of secondary air is located at the exterior pipe connection to the housing to provide an annular air passage through the housing to the burner outlet to obtain maximum flame concentration in the housing and inhibit burn back or back flaming. An internal restrictor adjacent the burner pipe outlet is employed to increase the burner gas velocity and aid in secondary air aspiration and combustion efficiency.