Abstract: A safety lock bracket is provided for affixing the end of a door frame header having internal roller tracks to the end of a door jamb over which it is mounted.

Abstract: A smoke stop for doors is disclosed. The smoke stop consists of a metal frame with a slot therein extending along substantially the entire length of the frame on the door side thereof; a continuous tube within the slot, the continuous tube having retarded decomposability at the kindling temperature of the door and the continuous tube having one or more fins running the entire length thereof and projecting outward on the door side of the frame; and an intumescent material completely enclosed within the continuous tube. When the door is closed and the frame and door are subjected to flames, the intumescent material expands causing the sealing of the space between the frame and the door and thereby providing a smoke stop between the door and the frame.BACKGROUND OF THE INVENTION1. Field of the InventionThis invention relates to a smoke stop for doors.2.

Abstract: A paper product comprising mineral fibers and a nonfibrous, highly refined gel binder, the product having a thickness no greater than about 0.080 inches and an apparent specific gravity of between about 0.25 and about 0.85. The product may be a sheet no thicker than about 0.012 inches, or a paperboard.

Abstract: Porous gypsum granules are produced by adding powdered plaster to a stable aqueous foam and agitating the foam until granules of desired size are formed. Agitation is terminated before the foam collapses, but when the foam has subsequently collapsed the damp granules are recovered and dried. The product granules have a generally spheroidal shape mainly in the size range 0.25 to 2 mm, with a fine compact outer surface layer and a coarser interior with voids which confer high absorbency. These can be used as carriers for active materials such as herbicides or insecticides for agricultural or horticultural purposes or as fillers for plastics. Apparatus for continuously mixing fluid materials and suitable for use with foam and gypsum consists of a trough-shaped conveyor with a series of rotary agitators spaced along it.

Abstract: The invention relates to an improved accelerator for gypsum board manufacture, the accelerator containing a ground mixture of gypsum and a long chain fatty carboxylic acid, e.g. stearic acid, or a salt thereof, to the manufacture of the accelerator, and to its use in gypsum board production. The accelerator is less liable to deterioration on storage than conventional gypsum accelerators, and its use yields gypsum board of improved properties.

Abstract: A clip and assembly of two structural channels front-to-back by use of the clip, the clip having a one-channel connecting portion and means for gripping portions of the side flanges of the other channel.

Abstract: A hanger for mounting hollow metal joists perpendicular to headers and the like is disclosed. The hanger has a U-shaped top flange for hanging the hanger and a backplate suspended from the hanger with the backplate terminating at its bottom edge in a saddle for the joist to rest upon and with the backplate being bent outward and together at its upper portion to provide a support for the interior of the hollow metal joist.

Abstract: A specially prepared fiber reinforcement and improved gypsum wallboard are disclosed. The fiber reinforcement includes a multiplicity of relatively long fibers which are disposed at the interface of the core and cover sheets of the wallboard and are adhesively bonded to the cover sheets and incorporated predominantly into the portion of the core immediately adjacent to the cover sheets.

Abstract: A unitary integral metal stud formed of sheet metal for constructing a fire-retardant wall and the wall structure formed of a plurality of studs and a pair of spaced-apart layers of gypsum wallboard panels in abutting relationship, the stud comprising a web having a pair of flanges defining a wallboard panel-engaging channel on one side, and a kerf-engaging flange substantially centrally locatead on the other side, and means extending from the web and having a supporting surface adapted to have a second layer of gypsum wallboard panels affixed thereto. A first row of panels is engaged by the channel and kerf-engaging flange, whereas a second layer of gypsum wallboard panels is affixed to the supporting surface extending from the roof. Additionally apertures may be provided in the web to inhibit heat conduction through the metal stud, and additionally to provide space into which the edges of the wallboard panels may dissipate heat if they should become hot, as for example during a fire.

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 two 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, a web substantially perpendicular to the flange means, and a panel at the other edge of the web for supporting wallboard panels.

Abstract: Hardboard and other wood articles are made fire resistant by immersing the wood in a molten ammonium phosphate salt batn, preferably monoammonium phosphate.

Abstract: The load cell disclosed is for detecting changes in tensile loading of a multiwire structural post-tensioning tendon for a concrete structure. The load cell has a pair of spaced end plates, an elastically deformable cylindrical steel member which extends between and is connected to the peripheral portions of the end plates, and a telemetric strain sensing device mounted between the end plates centrally within the cylinder. The cylindrical steel member carries the full load of the post-tensioning tendon, and because of the central location of the strain sensing device within the cylinder member, measurements will not be affected by eccentricity.