Abstract: A method of operating a plurality of clean room in a compound within a common enclosure and supplying each room with filtered air by a blower-filter unit by arranging the clean rooms and the blowers connected thereto in two parallel spaced rows with a corridor therebetween, and permitting filtered air to escape the clean rooms from beneath the walls of the clean rooms. Continuous operation of the blowers produces a bubble-like volume of air surrounding the blowers which consists primarily of clean, recirculated air escaping from the clean rooms. By arranging the clean rooms and blowers so that the clean air bubble produced by each blower overlaps the bubbles produced by at least two other blowers, the entire compound can be contained in a highly purified atmosphere consisting primarily of recirculated filtered air. A portion of the air from one or more clean rooms may be discharged in an upward direction through an opening in its top wall.

Abstract: A system which easily changes a positive pressure space to a negative pressure space or vice versa. The system includes at least one space divider which forms first and second closed spaces. A blower, and blower duct combination in the first space is connected with one end of an airflow duct in the second space to force air into the second space to create a positive pressure in the second space. For creating a negative pressure in the second space, the blower, blower duct is placed in the second space and an outlet end of the blower duct is connected to another end of the flow duct in the second space to force air from the second space to produce a negative pressure in the second space. The flow duct is provided with apertures in a bottom surface through which air is forced into the second space when a positive pressure space is created.

Abstract: A clean air facility including a structure made of horizontal and vertical pipes secured together at their ends. The pipe structure includes horizontal pipes upon which blowers are secured. A clean pan is secured above the blowers and includes holes in a bottom of the pan through which air is drawn to the inlet of the blower. A cover on the pan includes slots along one edge through which air is drawn by the blowers. The outlet of the blowers are connected by ducts to an air feed covering secured to a HEPA filter through which air is blown by the blowers. The clean air facility is enclosed by vinyl panels on the sides, back, top and front. Each of the blowers, the pan, the side panels and the front panel are secured in place by VELCRO.RTM. fastener connections.

Abstract: A clean air facility is proposed in which a clean air room is formed by welding the sides, ceiling, ducts and flooring together to avoid any friction movement between the wall and ceiling of the clean air room. A filter-blower is supported on a frame support outside of the room so that it is easier to service the filter-blower and it is easier to move the facility since the filter-blower can be detached and separately moved. The air from the filter-blower is directed directly into elongate cells in the ceiling from which the air is distributed via apertures in the ceiling evenly throughout the clean air room.

Abstract: An apparatus and method for aerosol testing of experimental animals is provided. In one form, a modular testing chamber includes a fluidized bed generator of aerosol particles as a more reliable method and apparatus for evaluating the effects of environmental aerosols. A particular hexagonal geometry is employed in a tubular testing chamber to provide the most advantageous volume to surface ratios in transporting the aerosols through the chamber. The hexagonal chamber is readily stackable thereby enabling flexibility at the site of the researcher to meet his particular needs.

Abstract: A quick connect, disconnect connection between elements of a blower-filter system which makes use of adjacent compatible VELCRO strips on each element to be connected and a VELCRO tape which joins the two parts together by use of the VELCRO strips.

Abstract: An environmental clean air facility formed of a clear vinyl material secured to a frame formed by PVC pipes and fittings so that the clear vinyl material may be formed and draped over or attached to the frame to form a clean air enclosure. A power unit section including a blower motor having a prefilter unit on opposite ends through which air is drawn from the surrounding medium and directs the air through a HEPA filter, through an air delivery duct and into or out of the enclosure. The frame may be used for delivering air to the room or exhausting air from the room.

Abstract: An apparatus and method for aerosol testing of experimental animals is provided. In one form, a modular testing chamber includes a means for generating a fluidized bed of aerosol particles as a more reliable method and apparatus for evaluating the effects of environmental aerosols. A particular hexagonal geometry is employed in a tubular testing chamber to provide the most advantageous volume to surface ratios in transporting the aerosols through the chamber. The hexagonal chamber is readily stackable thereby enabling flexibility at the site of the researcher to meet his particular needs.

Abstract: A portable environmental clean air frame facility including a power unit section and a clean air section. The frame is formed by P.V.C. pipes and fittings so that clear plastic sheeting material may be formed and draped over the clean air section to form a clean air enclosure. The power unit section includes a blower motor having a prefilter unit on each end. One end draws air from the surrounding medium and one is connected to the clean air enclosure. The prefiltered air is directed through a HEPA filter, through an air delivery duct and into the enclosure. A bypass damper is provided for controlling the air flow velocity and for producing either a positive or negative pressue in the enclosure.

Abstract: A communication display device for simulating a humanoid or other animal structure. Fiber optic light elements are included with the device to simulate movement of various parts such as the joints, eyes or mouth for purposes of communication. Sound synchronization is also provided with the fiber optic light simulated body movements. The display device is effective in reaching the conscious and subconscious states of individuals with both vocal and non-vocal communications.

Abstract: An improved environmental chamber assembly, such as for caging animals, has a plurality of chambers or cages which are entirely supported by a free-standing plenum, which plenum supplies and/or exhausts air or a controlled atmosphere to and/or from the chambers or cages. The assembly is of a modular structure, with each chamber being separately attachable to the plenum. One embodiment utilizes a free-standing double plenum for carrying air both to and from the chambers, thereby permitting the use of chambers sealable from the ambient atmosphere. The chambers sit on individual shelves supported from connecting tubes which connect air inlets and air outlets of the sealable chambers with the double plenum. A further modification of the assembly provides for the use of a second double plenum arranged with the first double plenum in back-to-back relation, with the two double plenums being separable and capable of individual mounting, as on a wall.