Abstract: An adjustable door frame includes a latch jamb, a hinge jamb, two closure jambs, a base header and a closure header, each of which is unitarily formed of sheet metal. The jambs and headers are adjustably connected to accommodate variations in wall thicknesses. Each of the latch jamb, hinge jamb and base header has a flange section overlying the wall, an inside section extending into the doorway opening, a door abutment section extending perpendicularly into the doorway and a tongue section extending perpendicularly from the abutment section. Each of the closure jambs and closure header has a flange section for overlying the opposite wall surface, an inside section extending into the doorway and a folded back section defining a slot frictionally engaging the tongue sections.

Abstract: An installation frame to facilitate the mounting of a door frame in a rough opening in a domestic or commerical structure which includes parallel stanchions to be disposed, and secured, one on each side jamb, of the prepared frame. The stanchions with suitable horizontal spacers, are secured inside the jambs and the assembly is placed in the rough opening in a building and clamped in place. A first pair of crossed cables extending from the corners indicates, by included measuring devices, whether the frame is square. A second set of crossed cables extending from the corners indicates, by the closeness of cables at the crossing point, whether the frame is in a single plane and not askew. Adjustments are made to insure squareness and proper plane position and then the prepared jamb is centered in the opening and nailed in place.

Abstract: A metal subframe is anchored into an opening in a building wall as the wall is being built. A factory-glazed and factory-welded metal frame is snapped into the subframe conveniently from inside of the building. integral one-way clips or latches automatically align, center and permanently capture the frame as it is installed in the subframe, and no field welding is thus required. The latches are internal and inaccessible when locked, thereby making this metal window construction well suited for security installations.

Abstract: A prefabricated window stool/apron unit (10) comprises a ledge member (12) and a skirt member (14). The ledge member (12) has an essentially flat top horizontal surface (16) and an essentially flat back vertical surface (18). The skirt member (14) has an essentially flat vertical back surface (20). The skirt member (14) is positioned beneath the ledge member (12) whereby the back surfaces (18,20) of the ledge member (12) and skirt member (14) are essentially flush with one another to form a flat abutment surface (22). The skirt member (14) is oriented to receive fasteners (24) which extend orthogonally with respect to the abutment surface (22). A vertical front surface (30) of the ledge member (12) and a vertical front surface (32) of the skirt member (14) are contoured.

Abstract: A fluid transmission conduit welding habitat is provided, having an outer air supportable arcuate dome which is mounted over a point to entrap welding slag, sparks, and the like. A fire-resistant shield is disposed around the interior of the dome. Air supplied to the dome for selectively suspending the habitat. A conduit, filter, or the like is provided through the top of the dome to permit discharge of smoke including particulate matter resulting from the welding procedure. The air supply may be in alignment with the smoke discharge whereby the supply of air forms a carrier fluid for transmitting the smoke and particulate matter out of the dome.

Abstract: A hinge assembly is disclosed. A jamb cover of the assembly is adjustably mounted relative to a wall jamb. An adjuster sub-assembly is mounted within the jamb cover. The adjuster sub-assembly includes a bracket with a nut mounted thereon. An adjuster screw, the head of which is secured in a keyhole slot of the wall jamb, threadably engages the nut. A leaf spring is attached to the bracket, and a hinge member for the door extends through the jamb cover and contacts the leaf spring. The hinge is thus concealed from view.

Abstract: A deformable shim assembly for positioning a closure unit in building framework defining a rough opening. The system includes a plurality of flexible, generally identical shims each having a cylindrical surface curvature to provide a convex outer surface and a concave inner surface. The forward end of each shim is tapered and is defined by side edges with an angle of intersection bisected by the axis of symmetry. The side edges also define a plane that intersects the cylindrical outer and inner surfaces at an acute angle to define a wedge-shaped space. The space has a transverse cross section in the shape of a circular segment that diminishes progressively toward the forward end of the element.

Abstract: Improvements to a door frame are provided, comprising the provision of in a jamb member of the frame a slot that receive spaced apart legs of a hardware element, the said adapted to frictionally hold the position of the hardware element in the slot, and further comprising means for mounting the frame member to adjoining studs and headers by means of resilient elements adapted to provided angular adjustment of the members. There is further provided means to adjust the length of the frame elements by means of an extension element, which is used in combination with a decorative cover. A decorative trim element is further provided that resiliently mounts to the frame members and is adapted to press against the adjoining wall to provide a smooth junction therewith.

Abstract: A subterranean well fluid transmission welding habitat is provided, having an outer air supportable arcuate dome which is mounted over the well entry point to entrap welding slag, sparks, and the like. A fire-resistant shield is disposed around the interior of the dome. Air supplied to the dome for selectively suspending the habitat. A conduit, filter, or the like is provided through the top of the dome to permit discharge of smoke including particulate matter resulting from the welding procedure. The air supply may be in alignment with the smoke discharge whereby the supply of air forms a carrier fluid for transmitting the smoke and particulate matter out of the dome.

Abstract: An insulated, weatherproof window frame of synthetic resin material. The frame is comprised of inner and outer one-piece molded peripheral frame members both secured together with fasteners isolated from an outer surface of the outer frame member. The outer frame member also has an upper sash frame molded integral therewith and is formed with a sill provided with a water-evacuation slope and an integrally formed backsplash support wall disposed rearwardly on the sill. A lower moving sash is guidingly retained between the opposed parallel inner side walls rearwardly of the upper sash and sash has a lower sash frame member provided with a horizontal lower seal member for sealing support engagement with the backsplash support wall. The lower sash frame member has a depending protective flange spaced forwardly and overlying the seal member and cooperating with the backsplash support wall to isolate the seal member from water directed at the backsplash.

Abstract: Door jamb lock side apparatus and door jamb header apparatus. The lock side apparatus comprises a metal jamb member connected to a wooden lock side member substantially flush therewith. The jamb member has a protruding portion which extends into a channel in the lock side member. A passage through the jamb member and a passage through the lock side member are aligned and adapted to receive the throw of a door lock. The header apparatus comprises a metal jamb piece connected to a wooden header member substantially flush therewith. The jamb member has a protruding portion which extends into a channel in the header member. The header apparatus may be used with double doors. A method of securing a door jamb is also disclosed.

Abstract: An adjustable door frame assembly includes a frame member adapted to fit in a portion of the interior periphery of a door opening and including a raised hat portion having at least one spring clip retained therein. The assembly further includes a trim portion adapted to be slidably retained by the clip so as to allow for expansion of the frame assembly to accommodate a variety of wall thicknesses and irregularities.The frame assembly may be utilized in conjunction with pre-hung doors and is equally well adapted for use with windows, screens and other such items.

Abstract: An adjustable door jamb assembly which can be simply and accurately aligned and installed in a door opening. The jamb assemblies are each made up of a fixed section and an adjustable section. Each fixed section has a plurality of snap-in guide clips supported thereon. The clips each have a plate-like body with a leg at each end and an integral cantilever tongue extending generally parallel to, but converging toward, the plate-like body of the clip so that the tongue is deflected away from the plate-like body. A flange on the adjustable section is received between the cantilever tongue and one of the legs. The tongue of each clip frictionally engages the adjustable section holding it in adjusted position on the door jamb.

Abstract: A window trim assembly (10) is disclosed as having a window surround assembly (12), a casing (14), a seal (16) and mounting clips (18) cooperatively connected to securely and conveniently attach a preassembled window trim assembly to a window frame assembly or a similar apparatus.

Abstract: A device for firmly holding a frame adjacent to a construction member comprising a piece of sheet having marks for bending in the form of material remaining when an aperture is stamped out. The side of the stamped out aperture extending aligned with marks for bending is provided with serrations. Edges at the ends are also provided with serrations which will engage firmly in adjacent material when the device takes a zigzag shape in a space between members after compression in the longitudinal direction by the aid of a tool cooperating with hooks on the device. Said tool comprises two members which are movable relative to each other by a force exerting means. A device which is caught with hooks on the movable member and on a projecting on the other tool member is, thus, compressed in the longitudinal direction when said force exerting means is actuated.

Abstract: A locking apparatus intended to be anchored in the bore of an element and to receive rotatably by snap-in closure a mating element provided with an undercut head. The locking apparatus according to the invention includes a substantially cylindrical body having first and second ends. Outwardly directed gripping means are arranged in the peripheral surface of the body at its first end. The body has a coaxially arranged cavity which narrows toward an opening in the first end. The cavity extends to the second end of the body and the body is provided there with an inwardly directed flange. The body is expansible or flexible at the first end.

Abstract: An adjustable door frame assembly includes a frame member adapted to fit in a portion of the interior periphery of a door opening and including a raised hat portion having at least one spring clip retained therein. The assembly further includes a trim portion adapted to be slidably retained by the clip so as to allow for expansion of the frame assembly to accommodate a variety of wall thicknesses and irregularities.The present invention may be utilized on conjunction with pre-hung doors and is equally well adapted for use with windows, screens and other such items.

Abstract: A mine door system adapted for installation and a passageway in a mine, comprising a door frame adapted to be installed in the passageway and defining a doorway spaced below a ceiling of the passageway and mine doors hingedly mounted on the door frame for movement between open and closed positions. The system further comprises a top panel structure for substantially closing the space between the door frame and the ceiling of the passageway, the top panel structure being readily contractible heightwise of the passageway without loss of its structural integrity to accommodate a convergence of the ceiling and floor of the passageway without any substantial heightwise deformation of the door frame.

Abstract: A shower-partition contains a pivoted door which is hinged to a compensating section by means of hinges. The compensating section is secured, in such a manner as to be horizontally adjustable, to a second profiled rail by means of connecting elements. It is proposed to make it possible to align the pivoted door both horizontally and vertically in a simple manner, with little increase in production costs. The compensating section shall comprise an open longitudinal groove which faces the pivoted door and comprises an undercut for attachment of the hinge-holders. The compensating section is adapted to be aligned vertically, jointly with the pivoted door, in relation to the second profiled rail, the compensating section and/or the holder of the lower hinge being mounted upon the floor or the upper edge of a shower-tub.

Abstract: A door frame assembly for being positioned between the edge of a door and the edge of a door opening in a wall. The assembly includes a door frame member for being attached to the door opening; and shim structure for being positioned between the door frame member and the edge of the door opening to reduce the space between the door frame member and the edge of the door.

Abstract: An adjustable, reusable door frame includes in cross-section, a first L-shaped member (C) and a second L-shaped member (G) which overlap sheet rock surfaces (B, BB) of an untrimmed wall opening. The first member has a first projection (D.sub.p) which includes a doorstop extension (C.sub.e) which projection overlaps a second projection (G.sub.p) of the second member. A mounting leg extending projection (D) extends from an inside surface of the first memeber and attaches to a mounting bracket (H). Bracket (H) is attached to a stud (A) which defines an inside face of the untrimmed opening. An attaching bracket (E) extends between the first and second members and is fastened thereto by fasteners. A hinge side assembly includes slotted holes (FF) through which fasteners securing attaching bracket (E) extend. When door hinges are mounted to the hinge side assembly, the fasteners securing the door frame together are covered.

Abstract: A drywall frame compression anchor assembly for use with a sectional metal frame to be mounted in an opening of a wall comprises a restraining bracket having a pair of space support legs and a jamb anchor. The jamb anchor includes a hat section havng a generally U-shaped center portion and a pair of opositely extending wings projecting therefrom. The jamb anchor is moveably mounted between the supports of the spaced support legs to engage the surface of the opening.

Abstract: An alignment clip for windows and associated method is disclosed. The alignment clip consists of a base, an alignment clip element haivng at least one tab, a spring operatively associated with the base and the alignment clip element and screws which engage screw holes in the alignment clip element. The alignment clip is disposed within a window frame which is designed to hold window sashes. The tabs or the screws or both tabs and screws provide a method of adjusting a window assembly in a window receiving opening.

Abstract: A method and apparatus for aligning a door jamb relative to a door frame and securing the jamb to the frame. A pair of frame members are secured to the hinge and knob sides of a door frame and a pair of jamb members are secured to the hinge and knob sides of a door jamb. Each frame member has a plate portion and a flange portion having a plurality of slots therethrough. Each jamb member has a plate portion and a flange portion having a plurality of threaded passages therethrough. The door jamb is positioned relative to the door frame so that the respective flange portions are adjacent to each other and the slots and threaded passages are aligned. A plurality of threaded bolts are thereafter inserted into the slots and threaded passages in substantially parallel alignment with the adjacent jamb member and the frame member plate portions, the door jamb is selectively positioned relative to the door frame, and the bolts are tightened. Cap members may thereafter be secured to adjacent frame and jamb members.

Abstract: A mullion assembly for a door unit is adjustably attachable to support structure via a connector part. The assembly includes:(a) an elongated upright million member having T-shape in horizontal cross section, and(b) a foot bracket at an end of the mullion member and being adjustable for connecting the bracket to support structure so that the bracket can be shifted horizontally relative to the connector part fixed to the support structure, and then attached to that part,(c) the foot bracket having T-shape in horizontal cross section to interfit the T-shape of the mullion for blocking sideward motion of the mullion relative to the bracket.

Abstract: A fastening device for door, windowframes or cases comprising an adjusting screw attachable in a wall opening and a locking plate cooperating with said screw and fixable in said frame. The locking plate is attachable against the end border of the frame faced towards the edge of the wall opening. From the fastening plate of said locking plate a locking means protrudes allowing connection selectable in a longitudinal direction of said frame to a snap in connection provided at the upper part of the adjusting screw and provided to engage the locking plate.

Abstract: An automatic expander replacement window has a frame including left and right side member assemblies, a head member assembly and a sill member, each assembly including a frame element, an expansion element associated therewith and movable between a retracted position and an expanded position, a biasing element between and engaging the expansion element and its associated frame element and is of maximum bias where the expansion element is in its retracted position. A releasable strap holes the expansion element in the retracted position until the strap is cut, whereupon the biasing element drives the expansion element to its expanded position.

Abstract: A window insert assembly is disclosed having a spring-biased frame construction used to secure the insert within existing window frames of varying size. The insert assembly is particularly useful for mounting interiorly of an existing window pane to form a "double pane" insulative window structure, i.e., by creating a thermal cavity between the interior side of the existing window pane and the window pane of the insert. The insert assembly comprises a solid pane, such as a glass pane, mounted in a first frame. The first frame is received within a second frame which has movable sides for changing the size of the second frame. Springs are provided between the second frame and the first frame, preferably on all four sides of the rectangular window insert assembly, which bias the second frame outwardly relative to the first frame. The size of the second frame is adjustable by pressing one or more sides against this bias to fit the insert within an existing window frame in which it is to be installed.

Abstract: Apparatus and method for squaring and decambering at the assembly plant, and shimming at the job site, a thin metal door frame wherein the frame becomes an integral part of its own setting jig until installation, after which the semi-permanent setting jig is removed. Temporary jigs are used in the method to set the minimum door width tolerance and to square the frame elements.

Abstract: A frame for mounting devices such as garden windows into the ordinary window frame of a builidng. It includes so-called outer channel members that preferably can surround the garden window and to which the garden window can be secured and inner channel members that are disposed within the outer channel members and are held therein fixedly by screws that adjust their spacing inwardly and outwardly with respect to the outer channel members so that they can accommodate variations in the size, warp, out of square, and the like of the window frames, and also so that they can hold foam material or the like that can seal around the frame to prevent air from passing around the frame into the building.

Abstract: A door jamb for a movable wall system provides a downwardly open top channel, a pair of telescoping members attached to the door channel defining the sides of the door opening, and the telescoping members define a shape open away from the door opening to receive the edge of a wall panel. Preferably the top channel has a pair of L shaped members therein defining with the top wall of the channel on inner channel which receives coiled springs to bias a panel downwardly.

Abstract: An adjustable door jamb assembly which can be simply and accurately aligned and installed in a door opening. Sleeves mounted on door jamb pieces are connected by shafts forming guide units so the door jamb pieces can slide together or apart. The sleeves of the guide units surround the corresponding shafts so as to substantially eliminate play between the door jamb pieces in both the vertical and the horizontal direction parallel to the plane of the door opening. In a preferred embodiment, the sleeves and shafts are cylindrical for greater ease in installation of the door jamb assembly.

Abstract: A window trimming construction includes a trim portion dimensioned and arranged to cover a portion of a surface of a wall in a position circumscribing a window opening extending through the wall that is defined by a window framing. The window trimming construction also includes a molding portion dimensioned and arranged to cover a portion of the window framing disposed intermediate the surface of the wall and a metal frame mounted on the window framing. The molding portion is arranged to enable adjustment of its width according to an amount by which the metal frame is recessed. One embodiment includes a molding portion having a plurality of sections that each cover a corresponding plurality of sections of the window framing, each one of the molding sections having first and second strips joined together with an adjustable joint that enables adjustment of the width.

Abstract: A screw, particularly a wood screw, has a screw shank that consists of a first section which is provided with a thread and extends to the one end of the screw and of a second section without thread which terminates in a screw head. At least one annular projection, arranged concentric to the axis of the screw shank, is provided on said second section of the shank.

Abstract: A door and window frame formed from two connected L-shaped members. One L-shaped member has a first arm and inner and outer second arms; both second arms are approximately perpendicular to and intersect the first arm. The second L-shaped member has single intersecting and perpendicular first and second arms. One of the second arms of the first L-shaped member, and the second arm of the second L-shaped member, are provided with teeth for holding the members in position to form the frame. One or both of the L-shaped members is provided with an internal groove which can support a deformable strip thicker than the depth of the groove.

Abstract: A removable type of closure frame assembly, such as a window or door frame, is provided. It includes an outer circumferential part adapted to receive a panel member such as a window pane and is adapted to abut on the outer surface of a wall surrounding an aperture. A jaw component is associated with the outer circumferential part and has an elongated recess. A first locking formation is provided inside the elongated recess. An inner circumferential part is adapted to abut on the inner surface of a wall surrounding an aperture. A tongue component is associated with the inner circumferential part. A second locking formation is provided at an extremity of the tongue component. The first and second locking formations are adatped to lock together. A removable locking member is adapted to be inserted into the recess for pressing the first and second locking formations firmly into locking contact.

Abstract: A window unit has a plurality of adjustable anchors fixed to a bottom rail thereof. When the window unit is mounted in a building opening, a top rail thereof is received in a channel-shaped frame secured to an upper edge of the building opening and the adjustable anchors are each placed on an attachment base plate secured to a lower edge of the building opening. Then the adjustable anchors are adjusted to adjust the window unit in position between the upper and lower edges, and thereafter are welded or otherwise fastened to the attachment base plates.

Abstract: A slide mechanism for providing non-binding adjustment of the spacing between the components of an elongated structural member such as the vertical and horizontal frame members of a door or window frame for accommodating different buck widths during installation. The slide mechanism comprises a channel member and a tongue member adapted to slideably engage one another in loosely fitting relation to preclude binding during width adjustment. Each frame member is preferably provided with at least two such sliding mechanisms of which preferably one provides a dimpled channel member for assuring precise transverse registry of the frame components. By dimpling only one such channel member, a degree of non-binding angular or rotational motion between frame components is provided to facilitate easy installation.

Abstract: Coupling assembly joining two profiled rails, more particularly for use with a shower partition, the first profiled rail having an opening extending over its entire length and an inner space. A clamping element is mounted in this inner space and has a threaded hole in which a screw threads, the second profiled rail being secured to the first profiled rail by tightening of the said screw. In order to facilitate assembly and make it possible to carry out subsequent mutual alignment of the profiled rails with little effort, there is provided that the clamping element be insertable from the side and at right angles to the longitudinal direction of the first profiled rail through the above-mentioned opening and into the inner space, one leg of the second profiled rail passing through the opening into the inner space. This leg is clamped in a gap which is formed between a bearing surface of the clamping element and a web of the first profiled rail and/or a support element.

Abstract: A window insert assembly is disclosed having a spring-biased frame construction used to secure the insert within existing window frames of varying size. The insert assembly is particularly useful for mounting interiorly of an existing window pane to form a "double pane" insulative window structure, i.e., by creating a thermal cavity between the interior side of the existing window pane and the window pane of the insert. The insert assembly comprises a solid pane, such as a glass pane, mounted in a first frame. The first frame is received within a second frame which has movable sides for changing the size of the second frame. Springs are provided between the second frame and the first frame, preferably on all four sides of the rectangular window insert assembly, which bias the second frame outwardly relative to the first frame. The size of the second frame is adjustable by pressing one or more sides against this bias to fit the insert within an existing window frame in which it is to be installed.

Abstract: A flush finishing metal door/window frame is provided for a reveal of an opening in a wall that has a pair of oppositely positioned wall board sheets. Wall finishing materials are used for finishing outside surface of the wall board sheets and stepped side flanges of a frame member in a continuous flush manner.

Abstract: A protective cover for window sills comprises an elongate keeper strip (6), pinned securely to an upper surface of the sill adjacent a window frame (4); an elongate anchor strip (8) pinned to an under surface of the sill adjacent the subjacent brickwork (3); and an elongate, U-shaped cover member (7) having upper, front and lower walls shaped to embrace the exposed portion of the sill. Free edge portions of the cover member (7) are formed with detents (7d) and are insertable with a push fit into corresponding recesses in the keeper strip and anchor strip.

Abstract: A method and device is being proposed for the simple setting and positioning of a door frame (12) for example in a wall opening (10). Thereby inflatable air bags (20,22) are set between the corner areas of the frame (12) and the wall opening (10) which cause a vertical and horizontal power on the frame jambs (14, 16, 18), which are positioned with this power. Expanding elements (28, 30) can also be placed between the frame longitudinal jambs (14, 10).

Abstract: A device is claimed for attaching a frame to an aperture in a wall of a building, comprising a U-shaped female member having a first part of said frame, said female member having a plurality of teeth on the inner side of one limb thereof; and a co-operating male member attachable to a second part of said frame, said male member having a plurality of co-acting teeth on a portion thereof; whereby said male member is insertable into said female member so as to be irreversibly locked in relation thereto when said female and male members are attached to said first and second parts of said frame respectively and said first and second parts fitted together in conventional manner.

Abstract: A frame having a U-shaped cross-section is clamped at a wall rim bounding an opening in a wall by means of a clamping jaws. The clamping jaws are formed by a steel sheet bent over in its longitudinal direction and are profiled substantially throughout their lengths, so that with a small thickness of material the clamping jaws mainly derive their rigidity from their profile.

Abstract: Coupling assembly joining two profiled rails, more particularly for use with a shower partition, the first profiled rail having an opening extending over its entire length and an inner space. A clamping element is mounted in this inner space and has a threaded hole in which a screw threads, the second profiled rail being secured to the first profiled rail by tightening of the said screw. In order to facilitate assembly and make it possible to carry out subsequent mutual alignment of the profiled rails with little effort, there is provided that the clamping element be insertable from the side and at right angles to the longitudinal direction of the first profiled rail through the above-mentioned opening and into the inner space, one leg of the second profiled rail passing through the opening into the inner space. This leg is clamped in a gap which is formed between a bearing surface of the clamping element and a web of the first profiled rail and/or a support element.

Abstract: A door jamb assembly for varied installations in a conventional rough cut door opening disposed in a wall, the assembly including first, second, and third elongated members for mounting on the sides and top of the rough cut door opening to form a pair of door jambs and a header. Two of the elongated members are configured so that they will mate on one end thereof to the first elongated member and on the other end thereof to a portion of the other elongated member between the ends thereof, these two elongated members being essentially mirror images of each other. As a result, a door jamb assembly is provided which can be installed in various width door openings to provide jambs for doors which can be hung with left or right hinges and which open in or out. Additionally, the width of the jambs and header is variable to accommodate walls of different thicknesses.

Abstract: This invention is an adjustable frame member or jamb for a wall opening and a method for making it. It consists of two side-by-side jamb members, a spring and a stop. The stop is attached to one jamb member in an overhanging or step-like relationship. The spring is inserted into the back of this member so that an elongated portion defines a slot with the overhanging portion of the stop. Narrow kerfs are appropriately let into the back of the jamb and the door stop for anchoring the arm portions of the spring. The second jamb member is slid into the slot defined by the stop and spring, where it is firmly gripped by the spring. By forming one mounting point for the spring in the back of the stop, a short lever arm is maintained to better resist any prying or dislodging forces applied against the spring caused by the other jamb member. The artical can conveniently be made by first attaching one edge of the stop to a jamb of the narrowest width expected in use.

Abstract: An adjustable device for anchoring door jambs of various sizes in a fast and efficient manner. The device includes one or more frame members which receive a pair of overlapping L-shaped planar members in sliding engagement with each other. Each frame member is generally of an L-shaped configuration having vertical and horizontal planar portions, and with a lip formed along the outer edge of the horizontal portion to provide a slot for use in retaining the overlapping members. The overlapping members each have vertical and horizontal planar portions, with the horizontal portions being of sufficient length to allow the length of the overall anchor to be varied by slidably positioning the overlapping members relative to each other. The position of each frame member relative to the overlapping members can also be adjusted to correspond with the shape and construction of a particular door jamb.

Abstract: A mine door system adapted for installation and a passageway in a mine, comprising a door frame adapted to be installed in the passageway and defining a doorway spaced below a ceiling of the passageway and mine doors hingedly mounted on the door frame for movement between open and closed positions. The system further comprises a top panel structure for substantially closing the space between the door frame and the ceiling of the passageway, the top panel structure being readily contractible heightwise of the passageway without loss of its structural integrity to accommodate a convergence of the ceiling and floor of the passageway without any substantial heightwise deformation of the door frame.