Abstract: System for forming concrete tilt up wall panels, wherein a plurality of form pans are assembled on guide bars resting on a flat surface by receiving lugs on the guide bars into openings in flanges of the form pans, the flanges of adjacent form pans being overlapped and being engaged with common guide bar lugs. The form pan assembly is surrounded by metal members forming a boundary for the overall form. Inserts may be placed in the forms for providing connections for lifting, and for propping up the finished wall panel. Several connection appliances are provided by the invention.

Abstract: Earth station antenna and method for assembly wherein the antenna has a frame made up of accurately stamped radial ribs and circularly disposed cross members, the frame being filled in by either sheet metal segments or by screen mesh segments to form a parabolic surface. The ribs are supported by a central ring or barrel, which is rotatable during assembly, and by back braces which are adjustable to bring the ribs to true parabolic positions and to tune the completed antenna. Assembly may be done from the ground by rotation of the central barrel. Novel connection means and a positioning gage are used during assembly of the antenna.

Abstract: Louver structures having horizontally disposed overlapped members, whereby in one disposition, the louver structure sheds precipitation at one of its sides, and in reversed inverted disposition, the louver structure sheds precipitation at the other of its sides, in said one disposition the louver elements projecting from a wall in which the louver structure is installed, and in said reversed inverted disposition the louver elements being recessed into the wall in which the louver structure is installed.

Abstract: Method and apparatus for use in balancing the blades of ceiling fans, wherein the pitch angles of the blades and the dihedral angles of the blades are measured and corrected, if necessary, by use of a beam of light reflected from a mirror temporarily flushly affixed to each blade, and wherein indexes are provided for measuring and correcting, if necessary, the circular angularities between the blades. Blades may be tested both individually or in sets connected to a hub.

Abstract: Attic fans and apparatus for supporting the drive motors of attic fans, the attic fans being of the type having a housing connected around the sides of a rectilinear aperture through a wall, usually the ceiling of a home or building, the housing having a circular opening within which radially disposed fan blades mounted on a central shaft are rotated. In the attic fan shown herein, the blades are supported between spaced plates rotatively carried on the shaft. The shaft is supported at its lower end by a plurality of radially disposed supports, and is supported at its upper end by a single radial disposed support. The drive motor is supported at one side of the circular opening through the housing by a rod extending from the upper radial support to the housing. A support plate element pivotally connected to the rod has upper and lower inturned portions which engage the motor.

Abstract: Method and apparatus for improving building heating and cooling, wherein relatively cooler air is circulated upwardly from adjacent the floor of a room or other space. The upwardly projected relatively cooler air displaces relatively warmer air from the upper part of the room or space, and the warmer air is displaced to a lower level, thereby tending to equalize the air temperatures at different levels of the room or space. The apparatus used for air circulation is adapted for use also in periods when cooling is required, as in summer, in a disposition to propel air horizontally. The apparatus structure includes adjustable legs permitting use of the fan or blower in dual positions.

Abstract: Solar heating system, wherein solar heating assemblies are adapted to form the roof of a structure. The solar heating assemblies may not occupy the entire surface area of a roof, but the upper sheathing elements of the solar heating assemblies may extend over the entire roof area so that no other provision for roofing of the structure is necessary.

Abstract: Methods and apparatus for installing insulation, wherein insulation is delivered into vertical wall spaces formed between a permanent wall at one side and a plastic membrane at the other side, the permanent wall and the membrane being supported by vertical members such as studs. The membrane forms a vapor barrier over the wall area, and is covered by wallboard such as sheetrock or paneling, or the like. To prevent sag of the membrane during installation of the insulation, a shield plate is held against the outer side of the membrane during the time that the insulation is being delivered into the space between the permanent wall and the membrane.

Abstract: Combined chuck wrench and electric plug, wherein the handle or shaft of a chuck wrench structure is molded into the body of the electric plug, the operating wrench end extending from the electric plug body in a position for use in adjusting, tightening and releasing a chuck. The electric plug must be removed from a socket before the chuck wrench may be used, thereby insuring the user against the possibility of incurring an electric shock and against the possibility of injury from operation of a tool while the chuck is being adjusted.

Abstract: Apparatus and methods for controlling fan operation, wherein a temperature difference sensor senses inside and outside temperatures, and actuates switch devices so that fan operation is commenced when the interior temperature exceeds the exterior temperature by a predetermined amount. Fan operation may also be controlled in response to humidity, a humidistat actuating the fan when the humidity exceeds a predetermined level.

Abstract: Attic fans of improved and economical design, wherein the blade hub, which in conventional attic fans is a cast hub is eliminated, and wherein the pulley on the blade shaft is eliminated.

Abstract: Rotary turbine ventilators, wherein the vanes are connected to the base ring of the rotary element by a crimping or swaging operation instead of by welding or riveting. The method of manufacturing the ventilators is particularly adapted to the manufacture of aluminum ventilators because of the saving of labor and cost which results when aluminum ventilators are made thereby, although the method may be used to manufacture ventilators of other materials.

Abstract: Ventilators for mobile homes, and the like, particularly of the type which have an attic space beneath the roof and above the ceiling of the mobile home interior. The ventilator has an intermediate air intake for ventilation of the attic space, so that the ventilator may be used to ventilate both the interior of the mobile home and the attic space.

Abstract: Automatic damper having pivotal semi-circular vanes which are moved to open position by pivotal movement of a longitudinal element disposed along the central gap between the vanes. The movement of the longitudinal element is controlled by a temperature responsive element. Retraction of the longitudinal element causes closing of the vanes. A J-slot arrangement locks the vanes in open position.

Abstract: Box for mounting diffusers, wherein the main body of the box is made of expanded plastic or other similar material, and wherein one or more connection elements are molded within the walls of the box to provide for connection of the box to a building structure and to a duct, and to reinforce the box.

Abstract: Louver fan assembly including a housing for mounting a fan at an angle in line with the slats of the louver. The invention also provides an improved design of louver for use with the housing and fan.

Abstract: Fans for use with turbine ventilators and apparatus and methods for supporting the same, wherein the fan is supported spaced from the entrance to the turbine ventilator whereby aspiration increases the air flow through the ventilator.