Abstract: An air purifying system includes an air purifier mechanism, a controller, and a sensing device. The sensing device is configured to measure an air quality parameter of the air entering the housing via the air inlet to generate inlet air quality data, and to measure an air quality parameter of the purified air exiting the housing via the air outlet to generate outlet air quality data. The controller is configured to: receive the inlet air quality data and the outlet air quality data, compare the inlet air quality data and the outlet air quality data with their corresponding predetermined threshold ranges, and determine an action to be taken.

Abstract: A construction method for building a post frame building by first constructing the roof near ground level. The roof assembly can have a removeable safety net system and be coupled to a plurality of support members, such as columns having a hinge connection to the roof assembly. Upon the roof system being lifted, the hinged columns can fold under the roof system and then be coupled to one or more anchor points established in the ground. The roof system can be raised into position at a pre-determined height using a lifting apparatus, such as a hydraulic lift.

Abstract: A multi-core cable includes a plurality of coaxial cables being arranged in parallel with each other, and a synthetic resin covering member that collectively covers the plurality of coaxial cables. Each coaxial cable includes a center conductor, an insulator covering an outer periphery of the center conductor, and a metal outer conductor covering an outer periphery of the insulator. The covering member holds the plurality of coaxial cables in such a manner that the plurality of coaxial cables are aligned side by side along a direction perpendicular to a longitudinal direction of the plurality of coaxial cables. At least a part of the outer conductors of the plurality of the coaxial cables respectively contacts the covering member.

Abstract: A fabric fire rated door is described. The door utilizes a fire resistant fabric curtain with an end lock attachment. A tubular steel shaft is driven by an internal tube motor. The shaft is supported to minimize deflection. Single door shafts can also be joined together with a coupler shaft to create infinitely wide doors. The coupler shaft is spring loaded to act as a take up reel for a coupling curtain which will overlap each adjacent single door shaft. All curtains are attached to the same bottom bar. A hood covers the shaft, curtain, and the supports that run across the width of the door. The curtain travels over these horizontal supports as it drops down through the hood opening. The horizontal supports keep the curtain in position for proper seal during a fire/smoke event.

Abstract: The dumpster filtration system is an air filtration system that removes dust and other particles from a dumpster. The dumpster filtration system uses a fan placed externally to the dumpster that generates uses negative air pressure to draw dust and other particles through a gooseneck hose. The gooseneck hose routes air from the dumpster through a HEPA filter which removes dust and other particles from the air before it is ejected from the system. The dumpster filtration system comprises a gooseneck hose and a HEPA filtration system.

Abstract: An apparatus for providing an illusion of occupancy is provided. The apparatus includes a prime mover having a shaft configured to receive an actuator, an actuator configured to interface the prime mover to an illusion target, and a microcontroller having a memory operatively coupled to selectably operate the prime mover. The microcontroller is configured with a first value representing an average time between a plurality of first movements of the prime mover, a second value representing an average time between the first movement and a second movement of the prime mover, and a third value representing a quantity of random variability to be applied to the first value and the second value. The microcontroller is further configured to operate the prime mover in accordance with the first value, the second value, and the third value, thereby manipulating the illusion target and providing the illusion of occupancy.

Abstract: A fire curtain assembly is presented that is collapsible for easy transport and quickly and easily assembled for use. This system includes a panel having a plurality of support members positioned in approximate parallel spaced alignment to one another across the panel. The support members have a center section and opposing end sections that selectively connect to the center section thereby forming rigid supports across the panel. End sections have a handle member that connects to a pushrod having a locking pin connected to its end. The locking pin selectively engages and disengages the center section. The handle members have detents that fit within detent sockets thereby holding the handle members in a withdrawn position or an inserted position.

Abstract: A mounting is disclosed for securing in place a sheet (56) which constitutes a liner, cover or curtain. The sheet has an elongate attachment zone (60) which is thicker than the material of the sheet. The mounting including a clip (10.2) which is formed with an elongate hollow portion (12) having a longitudinal slit (14) along the length thereof. The attachment zone of the sheet is in the hollow portion of the clip with the sheet emerging from the clip through the slit. A cord (62) is connected to a lashing point (64). The clip (10.2) has a passageway (40) through which the cord (62) passes thereby to attach the clip and the attachment zone to the lashing point.

Abstract: An industrial traffic curtain can be formed of a plurality of overlapping strips suspended contiguously to each other from a hanger fixed adjacent to a top margin of the opening. Each strip is of a flexible transparent material of substantially uniform longitudinal character having a lateral cross-section defined by an alternating series of thicker portions separated from each other by thinner portions, the thicker and thinner portions having approximately the same width, the thinner and thicker portions being united by narrower tapered regions of changing thickness. The traffic curtain thus formed exhibits a surprisingly lower electrostatic attraction between the strips so that the resistance to separation from each other as goods and transporting vehicles attempt to pass through the curtain is much lower than prior art curtains.

Abstract: An actuator mechanism for window coverings, such as, Venetian blinds that eliminates the use of pull cords and tilting wands is provided. The actuator mechanism includes a stop member engageable with at least one of the slats to stop tilting movement thereof and a clutch arrangement between a drive axle and a tilt control mechanism, responsive to the stop member engaging at least one of the slats, to disengage the tilting force applied to a ladder cord supporting the slats.

Abstract: An architectural mesh sunscreen panel having at least a first portion including a first architectural mesh assembled from a plurality of first interwoven helically-wound spiral units and first connector rods; and a second portion including a second architectural mesh assembled from a plurality of second interwoven helically-wound spiral units and second connector rods. The first architectural mesh defines a first shading characteristic that is different from a second shading characteristic defined by the second architectural mesh.

Abstract: The string curtain has a hanging rack, multiple strings, multiple beads. The hanging rack has multiple hanging holes. The strings are hung on the hanging rack, and each string has a hanging head and a mounting head. The hanging head is mounted around the top end of the string, and mounted through one of the hanging holes, and protrudes a fastening tab toward the bottom end of the string, and fastened on the hanging hole of the hanging rack. The mounting head is mounted around the bottom end of the string. The beads are mounted slidably on the strings from the mounting head. Each bead has an inner diameter smaller than the outer diameter of the string for securely mounted around the string, and may be relocated a new pattern easily.

Abstract: A window blind assembly includes a top rail, a drawable curtain, and a releasable curtain-drawing mechanism. The drawable curtain has an upper section hung from the top rail, and a lower section extending downwardly from the upper section. The releasable curtain-drawing mechanism includes a pull cord for drawing up and lowering the drawable curtain, and at least one connecting unit for connecting releasably the pull cord to the lower section of the drawable curtain. The connecting unit includes a first engaging component connected to the pull cord, a second engaging component connected to the lower section of the drawable curtain, and an engaging mechanism disposed on the first and second engaging components for providing an engagement force therebetween to interconnect releasably the first and second engaging components.

Abstract: A safety device for Roman shades includes multiple loop members connected to the shade and multiple restriction members are connected to multiple loop members. Each restriction member includes two extensions which spirally wrap to each other so as to define an opening therebetween. Multiple engaging members are connected to the lowest loop members and each engaging member has two claws between which a through hole is defined. Each claw includes a slit defined axially in a distal end thereof. Multiple control ropes each have a top end connected to the top box and the lower end of each control rope extends through the openings of the restriction members and is connected to an insertion member which is inserted into the silts and engaged with the through hole of the engaging member corresponding thereto. When the control ropes are pulled laterally, the insertion members are disengaged from the engaging members.

Abstract: A Roman curtain device has an inner layer, an outer layer and multiple bridging pieces attached between the inner layer and the outer layer. Each of the multiple bridging pieces has multiple through holes to allow two drawing strings from a clutching device on an upper rail penetrating the aligning through holes on different multiple bridging pieces to pull up the curtain. Thereby, the Roman curtain device has the drawing strings covered inside to avoid danger caused by exposure of the drawing strings.

Abstract: A variable-angle tile partition comprises tiles of any shape, material, color, or degree of translucence. In one implementation, the tile partition is constructed with a first row of decorative tiles joined to a second row of tiles using a left or right-angled tile connector. In at least one implementation, the tile partition can further include a third row of tiles joined to the second row of tiles, typically using the other of the left or right-angled tile connector. A manufacturer can continually join each next row of decorative tiles with alternating left or right-handed tile connectors. The unique tying/joining together of tile rows using left or right-angled tile connectors at least partly allows the variable partition to partition constrained spaces in a uniform and variable manner, which can be used to diffuse light or sound, or otherwise provide various aesthetic and structural needs.

Abstract: A cord guide system for extending the life of cords in a covering for an architectural opening provides long wear surfaces made of metal or ceramic which can be retrofitted into existing cord lock systems or molded into the system. The invention provides such long wear surfaces that can be used with different cord drive systems each of which permit an operator of a covering to manipulate the covering between extended and retracted positions while locking the covering in any position between fully extended and fully retracted. Cord guide surfaces are preferably made of metal or ceramic which are harder than conventional base materials used in cord lock systems and further have higher melting temperatures than either the base material for the cord lock system or the polyester cords conventionally used in coverings for architectural openings. In this manner, wear of the cord lock itself is minimized which in turn minimizes the wear of the lift cords and extends the life thereof.

Abstract: A temporarily mountable strip door system includes a strip mounting frame. The frame has mounting features to enable releasable coupling to an exterior of an opening in a building. A plurality of flexible door strips are affixed to the mounting frame. The system includes means for releasably affixing the mounting frame to the exterior of the opening. A method for controlling climate in a temporarily enclosed space include moving conditioned air from inside a device having a permanent heating, ventilation and air conditioning unit associated therewith through a duct into the temporarily enclosed space. Air is returned air from the temporarily enclosed space to the inside of the device.

Abstract: Disclosed is a curtain system for a side of a shelter for domestic animals, wherein the side is open except for an animal restraining grid and the curtain system. The system includes an elongated tube horizontally mounted outside the grid. The tube carries a shaft about which an elongated curtain is wound. A horizontally extending end of the curtain protrudes through a slot of the tube. A drive raises and lowers the tube relative to the grid and winds and unwinds the curtain to raise and lower the curtain relative to the grid. The raising and lowering of the tube are independent of the winding and unwinding of the curtain. A fixed cable keeps the tube and curtain proximate the grid.

Abstract: When displaying decorative ornaments in vertical chains, that is, as ornament curtains, for example, in light fixtures, gaps or voids between the ornaments can detract from the overall visual appeal. Methods and apparatus of the present invention minimize the gaps and voids in an ornament display to provide a denser display of ornaments than the existing art. According to aspects of the invention, the denser ornament display is achieved by mounting ornament chains in gallery rings that suspend the ornament chains in staggered relationship either in multiple planes or within the same plane whereby the ornaments fill the gaps and voids in the visual field of the viewer. The invention also includes improved gallery rings and ornament chains that are adapted to be mounted to the improved gallery rings. Aspects of the invention may be used in many types of ornamental light fixtures, such as, chandeliers.

Abstract: An environmental strip curtain holding apparatus for suspending a plurality of flexible transparent strips forming a curtain includes a bar suitable for mounting to fixed structure adjacent to a location requiring the presence of a strip curtain. A plurality of pegs are coupled to the bar, each peg including a stalk extending outwardly from the bar. A cap is fixed to a distal end of the stalk spaced by a pre-selected distance from the bar. Each cap is generally symmetric with respect to the stalk to which the cap is fixed and has an outermost edge that is ovate to circular. The outermost edge of the cap is sized greater than the stalk to which the cap is fixed and greater than supporting holes in the strips forming the strip curtain.

Abstract: A single-piece molded plastic hanger for flexible plastic strips of a strip door system having a backing-plate portion and a cover portion connected with a continuous hinge portion. The backing-plate portion is mountable to a header of an opening and supporting studs and locking studs of the backing-plate portion engage apertures of the flexible strips to support them in a vertically hanging manner. The cover portion retains the hanging strips on the supporting studs and locking studs and the cover portion is held in a closed condition by engagement of the locking studs with the cover portion. Replacement of flexible strips is easily carried out manually without the use of hand tools, or the like.

Abstract: A hanger for plastic strips having uniformity spaced apertures along an end portion thereof, to form a strip door across an opening. Uniformily spaced studs are provided on a mountable backing plate to support the plastic strips. A retaining plate retains the strips on the studs which have locking means along the length thereof, so as to provide an adjustable effective length for each of the studs.

Abstract: An environmental strip curtain holding apparatus for suspending a plurality of flexible transparent strips forming a curtain includes a bar suitable for mounting to fixed structure adjacent to a location requiring the presence of a strip curtain. A plurality of pegs are coupled to the bar, each peg including a stalk extending outwardly from the bar. A cap is fixed to a distal end of the stalk spaced by a pre-selected distance from the bar. Each cap is generally symmetric with respect to the stalk to which the cap is fixed and has an outermost edge that is ovate to circular. The outermost edge of the cap is sized greater than the stalk to which the cap is fixed and greater than supporting holes in the strips forming the strip curtain.

Abstract: A curtain track adjustment assembly adopted for use on different sizes of doors and windows enables users to drape curtains as desired. It includes a winch to retract or extend a steel cable. A brake paw is coupled with a spring which provides a restoring force to anchor the brake paw on a ratchet gear of the winch so that the length of the steel cable may be controlled and adjusted to suit different sizes of windows.

Abstract: A gate arrangement for closure of a passageway between rooms with markedly different temperatures, such as the passageway of a freezer-room. Two door curtains are arranged parallel to one another, with each being capable of closing the passageway independently of the other. The door curtains have an abutting insulating air buffer between them, wherein at least one of the door curtains can be motor-driven at such a speed that it is suitable as a temporary high-speed closure between successive passages or transits therethrough. The two door curtains together with the insulating air buffer develop the insulation effect required to maintain the desired cooling temperature. Thus, frequent stocking of the room is possible while compromise of the climate in such rooms during stocking operations is kept to the minimum possible.

Abstract: Throughway barrier apparatus comprises a pair of housings (51, 52; 151, 152) to be sited one to each side of a throughway (58). Each housing is provided with an upstanding surface (53, 54) of magnetic material, the two surfaces (53, 54) facing one another. A movable device (65) is magnetically coupled to each upstanding surface, and drive means (60) are arranged to move the magnetically coupled device upwardly and downwardly of the surface (53, 54). A barrier element such as a chain, cable, boom or the like extends across the throughway (58), the barrier element (55; 155a, 155b) being in use connected to the two said movable devices (65) for movement therewith.

Abstract: A substantially transparent thermal barrier for use in an opening between a refrigerated area and an adjacent area having a significantly higher temperature is suspended by its upper margin from a header. The barrier is formed of a plurality of strips positioned adjacent to each other, each strip including at least two sheets of substantially transparent material fixed to each other so as to define a plurality of channels extending from the upper end to the lower end of each strip, with at least the upper ends of the channels being open. The header directs a flow of warmed and/or dried air into the upper end of the plurality of channels, the air preferably being taken from the colder of the two adjacent areas separated by the curtain. The air is warmed to a temperature about midway between the temperatures of the two areas separated by the curtain.

Abstract: A substantially transparent thermal barrier for use in an opening between a refrigerated area and an adjacent area having a significantly higher temperature is suspended by its upper margin from a header. The barrier is formed of a plurality of strips positioned adjacent to each other, each strip including at least two sheets of substantially transparent material fixed to each other so as to define a plurality of channels extending from the upper end to the lower end of each strip, with at least the upper ends of the channels being open. The header directs a flow of warmed and/or dried air into the upper end of the plurality of channels, the air preferably being taken from the colder of the two adjacent areas separated by the curtain. The air is warmed to a temperature about midway between the temperatures of the two areas separated by the curtain.

Abstract: A material for use in an industrial traffic curtain formed of a flexible transparent material, such as polyvinyl chloride, having a substantially uniform longitudinal cross-section, which can be achieved by way of a conventional extrusion process. The strip of material has a transverse cross-section defined by first and second parallel surfaces, the surfaces having an array of regularly spaced, generally rectangular longitudinal ribs of predetermined height and width. The ribs on the first surface are arranged to be coincident with the ribs on the second surface. Each adjacent pair of ribs on each of the surfaces is interspersed by a linear bead having a height dimension approximating the height dimension of the adjacent pair of ribs. The linear beads have a width dimension less than about 10% of the distance between the adjacent pair of ribs so that the space between each pair of ribs remains substantially transparent and vision through the strip is unimpeded.

Abstract: A strip curtain system has an elongated track (10) that has a back side (11) with a bottom flange rail (14) and a front side (12) with a bottom flange rail (14) providing a channel 15. The track back side has a ridge (17) extending above at least a portion of the back side bottom flange. The track front side has a channel access port 22 located in front of the back side ridge. A number of curtain strips (30) have a bifurcated hanger (31) mounted about opposite sides their top ends. The bifurcated hangers have a bottom (37) shaped to be slidably supported upon the track rails and a hang support surface (38) for support upon the track back side ridge.

Abstract: In a theatrical rigging system, a number of motors can be placed on platforms which can move upon rails to be connected to different theatrical rigging elements. The motors can be randomly attached to operate different overhead hanging devices.

Abstract: Birds, especially, pigeons dislike the presence of a magnetic field because each bird has a biological instinctive ability of sensing the presence of the magnetic field. In order to utilize this biological instinctive sensing ability for the purpose of preventing birds from crowding at the upper part of a building, a plurality of magnetic members are disposed on an arm(s) turnably held at the uppermost end of a support column. When a bird perches on the arm, the latter is turned by the action of his own dead weight, resulting in the bird amazingly flying away from the arm. It is effective that a rotary wind blade having two magnetic members immovably secured to the opposite sides thereof is disposed at the uppermost end of each support column so as to largely affect the magnetic field induced by the magnetic members disposed on the arm and the magnetic members disposed on the rotary wind blade.

Abstract: Portable safety system for isolating an on-deck batter during a baseball or softball game comprises one or more poles, a length of cord long enough to surround an on-deck area, structure to support the cord and a fastening system for fastening the ends of the cord to the poles or to each other. The safety system may be free-standing and entirely supported by poles, or partly supported by a backstop commonly found on baseball fields in addition to one or more poles. The poles may have holes, brackets, a spring loaded roller, or part of a hook and loop system to support the cord. The fastening system comprises hooks, hook and loop material, or similar structures. The poles also contain structural elements to help in securely wrapping the cord around the poles for storage and transport. The safety system is lightweight, portable, inexpensive, and easy to assemble and disassemble.

Abstract: The roller blind (100) detachably fastened to a winding axis (50) can be rolled up on to and unrolled from the winding axis with the aid of pull cords, in which case the pull cords (20, 120, 220) are constructed in the form of U-like routed pull cord pairs (21, 121, 221) passed through guide rings (30, 31, 130, 131, 230, 231) with concentric pull cord connecting sections (24, 124, 224) proceeding parallel to the longitudinal axis of the winding shaft (50) and located on top of each other, which are seized for the rolling up and the unrolling operation of the window shade by a pull cord entrainment means (60) secured concentrically to the circumference of the winding axis (50).

Abstract: A strip curtain system having an elongated track adapted to be mounted over a doorway and having two spaced apart rails, a plurality of curtain strips and a plurality of hangers. Each curtain strip has a top end portion and a main body portion. The top end portion has at least one hole therethrough and a width less than the width of the main body portions. Each hanger has a male plate with at least one peg and a female plate with at least one hole sized to receive the male plate peg. A strip curtain may be assembled in the doorway by mounting the track thereabove, mounting the hangers to the top end portions of the strips, and sliding the hangers upon the track into abutment with one another with only the main bodies of adjacent strips suspended therefrom overlaying one another beneath the track.

Abstract: A garage screen enclosure for attachment to a garage door frame having a passageway which can be opened and closed using a pair of double sided zippers. The screen or portions of the screen can be wrapped around dowel rods and suspended from the garage door frame. Devices secure the zipper so that the passageway can be locked.

Abstract: A door suspension system has a frame mounting element and a cover element. These elements have projecting clamping elements which cooperate to clamp door strips between them to suspend the strips in a door opening. In addition, one of the cover or frame mounting elements includes a mechanism for supporting pins or other supports from which apertured door strips may be hung. Also, the cover and frame mounting elements may define channels from which door suspension strips may be hung. The combined clamping action and pin support or hanging support of the door strips results in securely supported strips. The cover element and frame mounting element cooperatively engage one another for mounting purposes. In a specifically illustrated embodiment, a set of flanges is provided on the mounting element for mating with a corresponding set of flanges on the cover element for purposes of aligning these elements as they are coupled together.

Abstract: The present invention relates to an improved environmental strip curtain system which allows for easy installation, removal, replacement and adjustment of the plastic strips. The environmental strip curtain system includes a curtain-holding apparatus and a plurality of flexible, transparent strips. The curtain-holding apparatus includes a bar which can be mounted above an opening and a plurality of pegs spaced equidistance from each other. Each peg includes a leg extending substantially perpendicularly from said bar, and a foot spaced from the bar and mounted to the leg so that each foot is substantially perpendicular to the leg. The strips have multiple holes near the top of each strip which are spaced the same distance from each other as the distance between the pegs. Thus, the strips may be removably suspended from the curtain-holding apparatus to create a barrier over the opening.

Abstract: A method and apparatus for opening and closing a strip curtain which comprises a plurality of parallel, long hanging strips arranged and vertically. A connecting member for connecting to one end of the hanging strips 7, a plurality of equally spaced operating members arranged at the connected end of the strip curtain and interposed among the hanging strips 7, each operating member is swingably attached to the connecting member for swinging or tiltable in a direction of alignment of the hanging strips 7, and operating connection means for opening and closing the strip curtain.

Abstract: An inverted "U" shaped bracket to be joined to similar brackets. The bracket including two arms. Each arm has a varying width which is greater at a center portion and is narrower at the ends of the respective arm. A slot is formed in each arm and a "V" shaped opening is formed in each arm, the apex of the "V" shaped opening communicating with the slot. The brackets are joined by inserting the arm of the bracket through the V slot in the similar bracket and turning the bracket to engage the arms of the bracket in the slot in the similar bracket.

Abstract: A flexible screen closing an interior wall opening in a building, has a series of hanging columns made of adjacent tubes of flexible material, each tube having discrete pieces of solid filler material arranged in series along the length of the tube, and each tube having rings around the exterior thereof at spaced locations along the length of the tube, to constrict the tube at those locations so that the tube is sufficiently flexible to permit movement of people through the screen for passage from one room to another.

Abstract: A temporary detachable doorway screen apparatus for a doorway in a dwelling comprises a flexible sheet of screening material shaped to cover the enclosed area within the open doorway. The flexible sheet is made from a flexible polymeric material which allows the entire screen to be rolled up or unrolled for use. The sheet of screen material is provided as a pair of side-by-side screen sections normally separated from one another and overlapping vertically along a central portion of the screen to form an opening along the overlapped portions of the screen sections. An elongated tension rod secured to the top portion of the screen is adjustable in length and applies spring pressure at its ends to the side of the door frame members for frictionally and releasably holding the tension rod above the doorway. This holds the flexible screen in position to cover the doorway.

Abstract: As the land becomes more populated due to the land being subdivided into smaller tracts the need for barriers to indicate the boundaries of the individual property holdings increases. In many instances it is no longer necessary to provide a fence tight closure as was previously considered necessary to confine small animals such as chickens, pigs etc. As the cost of erecting and maintaining fence tight types of gates has increased during recent years many people have realized that all that is required is a barrier to indicate the extent of individual property holdings. I have devised a versitile type of barrier that can be manufactured economically, and can be maintained in service at low costs.

Abstract: An overlapping strip-curtain construction for mounting on an elongated rod including a plurality of elongated flexible strip members each having an upper end and a lower end, a plurality of loops formed at each upper end of each strip member as integral extensions of the elongated body portion, spaces between the loops, with the body portions of adjacent strip members being in overlapping relationship with each other across their widths and with certain of the loops of each of the strip members being located in certain of the spaces of adjacent strip members.

Abstract: Screens for limiting heat losses from heated material, e.g. bars and slabs in rolling mills. Screens are provided in the form of strings of heat insulating bodies composed of metal shells containing insulating material. These screens may form curtains and/or covers for the hot material. Containing chambers for the hot material may be provided with such strings of elements and the chambers may also comprise structure for limiting heat conduction losses through the material supports therein. The screens may be collapsed over the hot material thereby completely surrounding and insulating the material from loss of heat. A displaceable chamber installation may also be provided for limiting heat loss when holding and transferring hot material between processing stages.

Abstract: A shutter arrangement adaptable to a solar energy system for either a residential or commerical building characterized by a skylight presented in a roof portion of the building, and a shutter supported on the roof portion and selectively slidable behind the skylight from and to a solar energy blocking relationship with respect to the interior of the building in response to temperature variations. The shutter surface facing the skylight presents reflective physical properties, while the surface facing the interior of the bulding presents an ornamental appearance. The invention affords two-fold primary purposes, to-wit, high efficiency for a solar energy passive building and a decorative effect for the building's occupant. Importance lies in the fact that the temperature responsive device or thermocouple serving shutter control is in direct engagement with the inner surface of the glass panel forming part of the skylight.

Abstract: A screen is made of hanging strands of beads of relatively large size and light weight. The beads are arranged to provide sound and thermal insulation to the extent desired between the spaces in a building on opposite sides of the screen. Two types of strand mountings are disclosed, with mechanism suitable to shift the strands laterally to increase or decrease the amount of occlusion provided between the spaces by the screen.

Abstract: A retractable safety shield is made of a plurality of telescoping support members, each having an identical cross-section and capable of formation by extrusion. Each of the telescoping support members has an elongated slot cut through it for a substantial portion of the length of the support members. Parallel guide grooves are formed in one surface on opposite sides of this slot and mating parallel ribs are formed on the other surface of each of the support members. The members are slidably interconnected with one another by means of rivets through the slots to cause the guide ribs on one support member to slidably nest within the guide grooves of the adjacent support member. Flexible shields are attached to the lower edges of each of the guide members to extend downwardly toward the work surface with which the device is used.

Abstract: A decontamination system in combination with a work space maintained at subambient pressure. An inner vestibule is connected to the work space via a first portal, which can be selectively opened and closed by a first door. A middle vestibule, in which at least one shower bath is installed, is connected to the inner vestibule only via a second portal, which can be selectively closed by a second door or opened. An outer vestibule is connected to the middle vestibule only via a third portal, which can be selectively opened and closed by a third door, and to an ambient space only via a fourth portal, which can be selectively opened or closed by a fourth door. Each door is a rigid door. Except for the third door, which seals the third portal when the third portal is closed by the third door, each door has fixed louvers allowing small quantities of air to infiltrate.