A stretchable carrier that has been provided with four straight stretcher bars that are divided in the corners by surfaces that stretch along the bisecting line of the corner between the center line of the stretcher bars that meet in the corner and at least one key fixed in a corner that is connected with both stretcher bars meeting in the said corner by means of friction effected by being jammed between the stretcher bars, whereby the top angle of the key is aimed at the corner and whereby the angle of the key is larger than the angle enclosed by the center lines of the stretcher bars meeting in the said corner. As this key is connected to the stretcher bars by this jamming and friction, the stretcher bars can be adjusted to any required dimensions without problems when connecting the stretcher bars.

A privacy screen attachment apparatus can include a connection mechanism configured for attachment or releasable attachment to a bottom of a work surface and/or a perimeter edge of the work surface for retaining a privacy screen body at the perimeter edge of the work surface so the body extends above the work surface. In some embodiments, the screen body can include the connection mechanism such that a portion of the screen body is foldable for attachment to the bottom of the work surface while a lower portion above the foldable portion is attachable to the perimeter edge of the work surface. In other embodiments, the connection mechanism can be a separate element that is positioned to retain or otherwise position a lower edge portion of the privacy screen body adjacent the perimeter edge of the work surface and/or in contact with the perimeter edge of the work surface.

A privacy screen attachment apparatus can include a connection mechanism configured for attachment or releasable attachment to a bottom of a work surface and/or a perimeter edge of the work surface for retaining a privacy screen body at the perimeter edge of the work surface so the body extends above the work surface. In some embodiments, the screen body can include the connection mechanism such that a portion of the screen body is foldable for attachment to the bottom of the work surface while a lower portion above the foldable portion is attachable to the perimeter edge of the work surface. In other embodiments, the connection mechanism can be a separate element that is positioned to retain or otherwise position a lower edge portion of the privacy screen body adjacent the perimeter edge of the work surface and/or in contact with the perimeter edge of the work surface.

Some embodiments provide a rooftop HVAC assembly including HVAC equipment and a screening system. In the present embodiments, the HVAC equipment is mounted operably on a roof of a building and the screening system is assembled operatively so as to surround the HVAC equipment. The screening system includes a screen panel that is adjustable between a lower, closed position and an upper, open position, e.g., by moving at least part of the screen panel selectively upwardly or downwardly. Further, some embodiments provide a screening system for a rooftop HVAC assembly comprising HVAC equipment and the screening system. In the present embodiments, the screening system is configured to be operatively assembled so as to surround the HVAC equipment when mounted operably on a roof of a building.

A screen assembly includes a first screen, a second screen, and a connector. Each screen includes a panel with a recess and a receiver positioned within the recess. The receiver has a locking member and an actuator. The actuator is operable to move the locking member relative to the receiver. The connector includes a body, a first contact extending from the body in a first direction, and a second contact extending from the body in a second direction. The first contact is received in the receiver of the first screen and has a first opening through which the first locking member extends. The second contact is received in the receiver of the second screen and has a second opening through which the second locking member extends.

A system for enhancing sound includes a support structure and one or more panels forming a panel structure. The panel structure defines a first and second portion of an oblong enclosure, both forming an approximated double ellipse profile, comprising a material having a sound reflective surface, and held by the support structure. The first portion extends between a first area proximate a first speaker driver and a second area proximate the listener. The second portion extends between a third area proximate a second speaker driver and a fourth area proximate the listener. The two portions are shaped such that sound waves emitted laterally from the first and second speaker drivers are reflected and focused toward the listener as spatially localized three-dimensional surround sound without electronically manipulating the sound signals and while reflectively reducing the effect of crosstalk.

Some embodiments provide a rooftop HVAC assembly including HVAC equipment and a screening system. In the present embodiments, the HVAC equipment is mounted operably on a roof of a building and the screening system is assembled operatively so as to surround the HVAC equipment. The screening system includes a screen panel that is adjustable between a lower, closed position and an upper, open position, e.g., by moving at least part of the screen panel selectively upwardly or downwardly. Further, some embodiments provide a screening system for a rooftop HVAC assembly comprising HVAC equipment and the screening system. In the present embodiments, the screening system is configured to be operatively assembled so as to surround the HVAC equipment when mounted operably on a roof of a building.

A patterned fabric with an image pattern includes: a fabric sheet having opposite first and second surfaces and a plurality of pores extending through the first and second surfaces, each of the pores being defined by a pore-defining wall; and a plastic film bonded to the first surface of the fabric sheet and having opposite first and second faces and an image pattern formed on the first face. The plastic film is perforated to form a plurality of through-holes extending through the first and second faces. Each of the through-holes is defined by a hole-defining wall. The hole-defining wall of each of the through-holes extends into a respective one of the pores and wraps around and is bonded to at least a portion of the pore-defining wall of the respective one of the pores.

A patterned fabric with an image pattern includes: a fabric sheet having opposite first and second surfaces and a plurality of pores extending through the first and second surfaces, each of the pores being defined by a pore-defining wall; and a plastic film bonded to the first surface of the fabric sheet and having opposite first and second faces and an image pattern formed on the first face. The plastic film is perforated to form a plurality of through-holes extending through the first and second faces. Each of the through-holes is defined by a hole-defining wall. The hole-defining wall of each of the through-holes extends into a respective one of the pores and wraps around and is bonded to at least a portion of the pore-defining wall of the respective one of the pores.

A safety gate has a frame with top and bottom assemblies spaced apart in a vertical direction and with opposed side assemblies spaced apart in a horizontal direction in a deployed configuration. A length of the top and bottom assemblies is extendable and retractable to adjust a width of the frame between the opposed side assemblies. A flexible barrier is connected to and supported by the frame. A one-way jack mechanism is carried on each of the top and bottom assemblies. The length of the top and bottom assemblies can be extended without actuating the jack mechanisms to adjust the frame to a desired width to loosely fit a space between two surfaces. The one-way jack mechanisms, when actuated, incrementally further extend the length of the top and bottom assemblies such that the frame interferingly fits between the two surfaces under compression.