Abstract: A doorframe assembly for partition wall construction is disclosed and comprises metal backer jamb members adapted for attachment to opposite sides of a door opening, vinyl jamb members snap-engaged with the metal backer jamb members, hinge plate means for supporting a door attached along a longitudinal recess portion of a vinyl jamb member at one side of the door opening, strike plate means adapted for receiving door locking means attached along a longitudinal recess of a vinyl jamb member at the opposite side of the door opening, and, mortising vinyl trim adhered along remaining open portions of the vinyl jamb members at both sides of the door opening and having a thickness substantially the same as the hinge plate means and strike plate means providing a mortised generally planar finished surface along the vinyl jamb members.

Abstract: A remountable unitary extruded plastic base for wall construction providing a decorative finished appearance, said extrusion having a preinstalled generally L-shape comprising a first leg connected to a second longer leg by means of a flexible hinge connection wherein the first leg is rotated to snap engage with the second leg to thereby conceal an attachment surface having fasteners therethrough, wherein the attachment surface and fasteners are concealed within a pocket portion between the first leg and second leg.

Abstract: An attachment system, and attachment clip therefor, is disclosed for attaching panel engaging ceiling runners, positioned either parallel or perpendicular, to air distribution bar structures and inverted-T runner ceiling supporting structures.

Abstract: A ceiling runner and panel assembly is disclosed for a suspended concealed ceiling system. The assembly provides sliding lockability and comprises vertically adjustable hanger brackets supporting inverted-T runners concealed within ceiling tile kerfed marginal edges. The ceiling tile edges have upper portions removed at periodic intervals corresponding to tab portions on the arms of the runners. The assembly provides simplified installation and accessibility of facilitating tile engagement with the inverted-T runners by lifting and shifting to slidably lock the tap portions within the kerfed edges. The ceiling is leveled by means of vertically adjustable hanger brackets rigidly supporting the runners from fixed upper support structures.

Abstract: Disclosed is a gypsum board having a kerfed edge along substantially the full length of at least one edge wherein the kerf has sidewalls inclined opposingly inwardly toward one another but do not intersect and are joined by a bottom surface of uneven profile characterized by alternately and irregularly spaced projections and depressions. The uneven bottom surface and each sidewall meet at a jagged intersection. Said kerfed edge provides enhanced strength in a direction perpendicular to the sidewalls providing improved board retention by flanged supports over that of conventional mechanically sawn kerfed edge boards. A process for providing kerfed edge gypsum board is also disclosed which comprises projecting into the board edge a first and second fine stream of aqueous liquid which incline toward one another at angles of incidence to a line perpendicular to the board edge which provides a combined angle therebetween of from about 3.degree. to about 20.degree..

Abstract: A resilient sheet metal runner for attaching wallboard to a supporting structure comprising a base attaching flange having a resilient web coextensive therewith and integral with a longitudinal edge thereof with a support portion integral with an opposite edge of the resilient web and a stop flange integral with the opposite edge of the support portion. The base flange is disposed in a first plane, the flexible web is disposed in a second plane at an obtuse angle to that of the base flange and with respect to a third plane represented by the support portion. The stop flange extends at an obtuse angle toward the first plane in a fourth plane which it occupies but is of less width than the resilient web so that it does not extend into the first plane.

Abstract: A composition for accelerating the setting of an aqueous calcined gypsum slurry, the composition comprising finely ground calcium sulfate dihydrate and a lignosulfonate. The composition, when added to an aqueous calcined gypsum slurry, accelerates the setting process and shortens the set time period as determined by the temperature rise set test procedure. The composition is useful for making gypsum wallboard.

Abstract: A meat dehydrator is disclosed and process utilizing same for the preparation of dehydrated meat comestibles. The meat dehydrator comprises a circular pan member and a circular grill member contacting said pan and supported above a bottom surface of the pan. A cylinder member which opens upward and downward and has upper and lower rims is mounted on bracket means of the grill to thereby define a cylindrical dehydrating chamber above the grill and spaced apart from the grill to provide an opening between the lower rim and the pan member to allow air passage therebetween. A circular lid cover is also disclosed movably mounted at the upper rim of the cylinder member to define a top of the cylindrical chamber disposed below. The lid cover includes means for mounting a heating element to extend from the lid into the cylindrical chamber to provide the heat source for the dehydration of meat.

Abstract: A calcining apparatus comprising a kettle, a heating jacket surrounding the kettle defining a heating chamber, vertical baffles dividing said heating chamber into a plurality of chambers, and a plurality of horizontally disposed heating flues communicating with said chambers defining a path whereby the heating gas provided for heating said apparatus makes at least two horizontal passes through said kettle before being exhausted, the calcining apparatus being adaptable for calcining material such as gypsum in either a continuous or batch process.

Abstract: An atachment system, and attachment clip therefor, is disclosed for attaching panel engaging ceiling runners, positioned either parallel or perpendicular, to air distribution bar structures and inverted-T runner ceiling supporting structures.

Abstract: A metal stud for constructing a fire-rated wall and the wall structure formed of a plurality of studs mounted in runners and having at least a pair of spaced-apart layers of wallboard panels with adjacent panels in abutting relationship, the stud being formed of an integral piece of sheet metal and comprising a single layer web having a first plurality of oppositely directed flange means at one edge thereof and a second pair of oppositely directed flange means connected to the web means at the other end thereof and spaced-apart from the first pair of flange means a sufficient distance to provide a pair of oppositely directed channels receiving the edges of adjacent panels of a single layer, and means extending away from the second pair of oppositely directed flange means and being connected to and supporting a panel spaced apart from the first and second pairs of flange means and adapted to have the wallboard panels of a second layer affixed thereto in parallel spaced-apart relationship with regard to the fir

Abstract: A hollow wall partition assembly is disclosed which comprises a flanged ceiling rail, two opposing spaced apart rows of wall panels, snap-on trim pieces engaging grooves on the ceiling rail whereby the snap-on trim pieces conceal exposed unfinished portions of the ceiling rail. The partition assembly includes a snap-on glazing cover for window framing which is engageable with the assembled ceiling rail and snap-on trim pieces. A mullion and jamb attachment clip is provided for attaching door frame jambs and vertical mullions to the assembled ceiling rail and snap-on trim pieces.

Abstract: This invention pertains to an integral one piece corner trim member for an outside corner of a building structure or interior partition wherein the trim piece comprises an extruded section formed from a suitable vinyl material and having an integral barb at the inner side thereof to hold the corner piece in position on the building structure until it is fixedly secured to the building walls.

Abstract: A clip is disclosed for securing sound absorbing panels or the like to supporting structures. The clip has a wall plate, a projection extending outwardly from the wall plate and at least two securing members at the end of the projection opposite the wall plate, with the securing members each extending further in one direction from the projection than their extension from the projection in the opposing direction.A sound absorbing system is disclosed and includes a supporting structure, clips, as defined above, attached to the supporting structure, and sound absorbing panels attached to the clips. The sound absorbing panels comprise a sound absorbing panel with a frame extending around the exterior perimeter of the panel, and the frame has a plurality of openings for accepting the securing members. The securing members are placed into the openings to attach the sound absorbing panels to the supporting structure.

Abstract: A relocatable wall mounting system is disclosed making use of a half-clip which, when mounted adjacent to a like half-clip at the abutting edges of wallboard panels, forms a spring clip attachment for engaging a slot in a support member to attach the panels to the support member. The half-clip has: a first shoulder section adaptable to be driven into the end of the wallboard panel; a base section extending from the shoulder section; a second shoulder section connected to the base section and extending in the direction of the end to be driven into the panel; and a curved spring arm extending outwardly and curving arcuately in the direction of the end to be driven into the panel.

Abstract: Disclosed is a gypsum wallboard panel having kerfing in opposing edges thereof which extends substantially the length of the edges but terminates prior to the corners of the panel a distance sufficient to prevent weakening of the corners of the panels.

Abstract: A pipe anchor bracket member is disclosed. The pipe anchor bracket, when engaged with a like member, forms a means for attaching pipes to other structures. The bracket member has a body section with a portion thereof curved to accommodate the outside surface of the pipe to be supported. The body portion terminates at one end in a flange having an outside locking surface and terminates at the other end in a curved flange having an inside locking surface adapted to engage in a locking manner the outside locking surface of a like member with the curved flange having a tab thereon adapted to secure the member to a like member with a pipe therebetween. The body section has extending therefrom means for securing the member to a supporting structure.

Abstract: A fire resistant and weathering resistant shingle or surface covering material ecologically desirable in its utilization of disposable glass is disclosed. The shingle has an asphalt coating with specified characteristics, and the asphalt coating contains from 10 to 55% by weight granular glass and preferably a combination of granular glass and non-glass granular mineral filler a major portion of which is granular glass, with each having a specified particle size distribution.A process is disclosed for producing a fire-resistant shingle or surface covering. The process includes saturating a felt base with a bitumen, admixing asphalt with granular glass and preferably with a specified combination of granular glass and non-glass granular mineral filler of specified characteristics, and then coating at least one side of the saturated felt with the filled asphalt.

Abstract: A support runner for use in suspended ceiling grid systems is disclosed with the support runner being useful in ceiling systems having an exposed flange for decorative purposes. The support runner comprises: a lower decorative trim member; an upper inverted T-runner; and, an intermediate spline member. The decorative trim member has a decorative lower surface and an engageable upper surface. A spline member is engaged about the engageable upper surface of the decorative trim and extends substantially along the full length of the decorative trim. The upper surface of the spline is an engageable slot. An inverted T-runner is supportingly engaged to the engageable upper surface slot of the spline and extends along the spline a distance sufficiently less than the length of spline and trim members to accommodate heat expansion distortion of the inverted T-runner.

Abstract: A filler for a mica-free joint compound, comprising by-product gypsum having a mean particle size between about 11 and about 12 microns, a percentage by weight of particles smaller than 1 micron of between about 5 and about 6.5, and a packed dry bulk volume no greater than about 93 cc. per 100 grams.