Abstract: An artificial window comprises a box having a rear wall, and walls bounding an interior space which faces longitudinally forwardly; sheet structure extending laterally crosswise of the space, and a viewable pattern associated with the sheet structure to be illuminated by light passing forwardly from the box interior; first and second light sources in the box; a reflector structure in the box to reflect light from the first source in a direction toward the sheet structure for effecting illumination of the viewable pattern; and there being control structure for controlling the illumination of the viewable pattern to independently, differentially, and progressively change the illumination of the viewable pattern.

Abstract: An artificial window comprising, in combination a frame having room window configuration to be supported within a room; video structure including a display encompassed by the frame; and control structure for the video structure to effect video presentation at the display, and to a viewer within the room, of a selected scene outside the room, and characterized as having an associated window size boundary as viewed by the viewer.

Abstract: A high pressure gas regulator, the combination comprising an axially movable poppet and an orifice controlled by the poppet in response to poppet axial movement, the orifice having upstream and downstream sides; a main diaphragm responsive to gas pressure at the downstream side of the orifice and operatively connected with the poppet to control poppet movement toward or away from the orifice in response to an increase or decrease in pressure a the downstream side of the orifice, respectively, auxiliary pressure responsive structure at the upstream side of the orifice, moving the poppet and orifice together or apart in response to a decrease or increase in pressure at the upstream side of the orifice, respectively, and housing structure enclosing the poppet, orifice, main diaphragm, and auxiliary pressure responsive structure.

Abstract: Opposed ends of two tubular members are relatively displaced toward opposite sides of an annular seal to deform the seal and reduce the seal bore into approximate or actual alignment with the tubular members bore.

Abstract: A high pressure gas regulator, the combination comprising an axially movable poppet and an orifice controlled by the poppet in response to poppet axial movement, the orifice having upstream and downstream sides; a main diaphragm responsive to gas pressure at the downstream side of the orifice and operatively connected with the poppet to control poppet movement toward or away from the orifice in response to an increase or decrease in pressure at the downstream side of the orifice, respectively; auxiliary pressure responsive structure at the upstream side of the orifice to control the poppet position with respect to the orifice, moving the poppet and orifice together or apart in response to a decrease or increase in pressure at the upstream side of the orifice, respectively; and housing structure enclosing the poppet, orifice, main diaphragm, and auxiliary pressure responsive structure.

Abstract: Opposed ends of two tubular members are relatively displaced toward opposite sides of an annular seal to deform the seal and reduce the seal bore into approximate or actual alignment with the tubular members bore.