Matches 301 - 350 out of 367 < 1 2 3 4 5 6 7 8 >
Match Document Document Title
4802734 Cold static balloons  
A cold air inflatable screen which can be inflated with a suitable air source and has sidewalls and a backwall and top and bottom and a front screen of white material. The screen is inflated and is...
4792209 Projection screen  
A slide projection screen is disclosed which is designed to facilitate video recording of projected images. To accommodate for varied light intensity levels, the screen resulting from the optic...
4705355 Motion picture screen assembly  
A motion picture screen assembly having a horizontal support beam and having a motion picture viewing screen which is detachably fastened at its upper edge to the support beam. Preferably two...
4652084 Projection screens for two- or three-dimensional front and back projections  
The present invention provides projection screens for two- or three-dimensional front and back projections in the form of panes or sheets of plastics, when required with delustering lamina and is...
4644522 Information transmission using dispersive optical channels  
A multiwaveguide cable in which the waveguides have different overall lengths can be made by twisting the waveguides during cabling. Waveguides situated at the "outside" of the cable will be longer...
4580361 Display tensioning frame  
A frame device for holding and displaying sign panels. The panels are held in tension along the edges by spring-biased slide means. The slide means along each side are all moved to prespecified...
4574506 Tensioning of flexible sheets across frames  
In a display or the like device, a flexible sheet is supported in tension within a frame by means of tensioning devices secured to the frame. Each tensioning device includes a movable peg which is...
4556283 Automatic viewing screen  
An automatic screen for projecting an image from a video projector onto it is disclosed. It has a cabinet 1 which accommodates a screen 2. The screen 2 can be moved relative to the cabinet by a...
4511211 Projection screen anchor  
A projection screen having spaced apart lateral edges and opposite upper and lower ends that is mounted at its upper end by appropriate support means to a wall and which has a means for releasably...
4478902 Screen for projection television  
A screen for projection television set comprising a foamed support and a reflective film adhered to the concave side of the support, said support having the outer layers with a high density such as...
4412799 Apparatus and method for stereo relief modeling  
An apparatus for automatically adjusting the level of at least one surface point on a flexible platen of a photogrammetry apparatus having photogrammetric images projected thereon in first and...
4408835 Viewing system with automatic correction of the reading distance as a function of the inclination of the viewing screen housing  
A viewing system with automatic correction of the reading distance as a function of the inclination of the screen housing. In accordance with the invention, the viewing system comprises a screen...
4406519 Projection screen assembly  
A projection screen assembly is disclosed. The assembly includes a screen which can be lifted into an extended position or lowered into a collapsed configuration for permitting a building in which...
4380368 Projection screen  
A projection screen comprises a metal plate member having substantially independent short raised ridges uniformly over the surface. In a process for treating the surface of a metal plate member, a...
4354737 Variable gain screen permitting off-axis viewing with image brightness remaining constant  
The invention is a variable gain non-Lambertian screen surface (12) for employment in a visual display system. The screen surface provides constant image brightness, independent of changes in...
4323301 Collapsible rear/front projection screen assembly  
A collapsible and portable screen assembly which is capable when erected of acting either as a rear or front projection screen in conjunction with a slide or movie projector. The assembly is...
4208115 Viewfinder system with focusing screen  
A focusing screen of a viewfinder system for a photographic camera is designed as a liquid crystal cell having two transparent bodies which lie opposite one another with plane surfaces at a short...
4184755 Image projection systems  
An improvement for use in image projection systems of the type which project an image from a substrate where a projector causes the image to be displayed on a receiving member such as a projection...
4167756 Split image camera system  
A camera system for providing a split image field of view. The split image camera system utilizes two planar mirrors which are arranged along mutually intersecting planes so as to transmit images...
4160942 Golf ball trajectory presentation system  
A trajectory calculator receiving data indicating initial values of golf ball flight angle, velocity and spin, calculates the apparent elevation and deflection angles at which the golf ball would...
4132462 Filamentary projection system  
A photographic projection screen formed of separate parallel filaments having a center-to-center spacing equal to their diameters allows a projectile to be driven through it with minimal...
4106852 Projection screen support structure  
A highly portable projection screen support structure including an extendable center support pole and two extendable side support poles. The structure is adapted to support a very wide horizontally...
4097013 Tripod stand for projection screen  
A tripod stand, providing a portable support for a projection screen, having a handle which is slidably movable on the standard of the stand and to which the case, which houses the viewing screen...
4025160 Dual purpose projection screen  
This application embodies a dual purpose projection screen comprising a layer of milky white, translucent, flexible plastic film, coated on one side with a layer of reflecting metal, and a layer of...
4022522 Projection screen  
A tailored membrane supported solely by a peripheral frame forms the front panel of a chamber. A source of vacuum or an air blower maintains a pressure in the chamber which differs from that of the...
4017152 Portable projection screen  
A portable projection screen including a sheet of flexible material and a collapsible support for the sheet. The support includes a central hub member having a plurality of sockets therein....
4006965 Projection screen  
A screen comprises a fabric formed by weaving transparent fiber bundle thereinto and a metallic layer formed on the whole surface of one side of said fabric and having an optically high...
4005932 Photogrammetric apparatus, methods of use, and products produced thereby  
Photogrammetric method and apparatus comprising a flexible platen used with standard stereo plotting instrumentation such as double-projection direct-viewing plotting instruments. The purpose of...
3992841 Panel construction and projection screen constructed from such panels  
Large projection screens, of which planetarium domes are typical, may conveniently be made up of a plural of prefinished panels, at least one edge of at least some of which panels overlaps another...
3964822 Projection screen and process for production thereof  
A projection screen includes a substrate having a metallic aluminum surface and a transparent film overlay. The metallic aluminum surface is provided with a pattern of directional irregularities...
3951518 Projector and projection screen assembly  
A box-shaped projection screen unit is attachable to an optical projector to constitute a cover therefor. The screen unit comprises a translucent screen mounted in an opening formed through the...
3942869 Projection screen unit  
A screen for a projection system supported by a pair of cross members extending to the four corners of the screen where they receive a tensioning member disposed around the perimeter of the screen...
3881800 Multicolor image memory  
A multicolor display system including a viewing screen having a multiplicity of closely spaced photoluminescent segments thereon in a regular array of alternating red, blue and green segments. A...
3844644 PROJECTION SCREEN  
This is a material developed for use as a front surface projection screen. It consists of three elements: the first being a milky white translucent plastic film, the second being very fine...
3802769 METHOD AND APPARATUS FOR UNAIDED STEREO VIEWING  
An unaided stereo viewing system using a hologram as a rear projection screen. The hologram, by having two sets of interference patterns recorded thereon, has the property that, if a stereo pair of...
3786417 SCHEME FOR MAPPING MECHANICAL TRANSLATION TO A RELATIVELY ARBITRARY INDEX TABLE  
Apparatus for registering or indexing in sequential manner the position of microimages onto a table of human readable information, wherein optical fibers carry light from a masked source to an...
3754756 THEATRICAL SCREEN FOR COMBINING LIVE ACTION AND PROJECTED PICTURES  
A theatrical screen for reflecting projected images and through which objects may pass comprises a plurality of substantially vertically extending elongated elastic strips the upper and lower ends...
3655203 PENETRABLE TARGET SCREEN  
The invention is an improvement in the construction of a penetrable target screen comprised of an adjacent series of narrow parallel strips of tape so mounted as to permit target images to be...
3653740 PROJECTION SCREEN  
There is provided a projection screen comprising a support, a layer of double rolled aluminum foil having one smooth surface and one coarse surface, the smooth surface thereof being in contact with...
3650608 METHOD AND APPARATUS FOR DISPLAYING COHERENT LIGHT IMAGES  
A method and apparatus for destroying the scintillation or speckling effect observed when a bema of coherent light is impinged or directed upon a stationary screen includes a relatively thin layer...
3604791 SYSTEM (PROCESS) AND DEVICE FOR FILMING AND PROJECTION OF CINEMA FILM FOR VARIABLE SCREEN  
A method and apparatus for producing motion pictures which are elongated either horizontally or vertically to suit the artistic requirements of particular scenes. In addition to the normally...
3547518 REINFORCED PLASTIC SCREENS  
3528730 MULTI-IMAGE SYSTEM  
3511555 PORTABLE PROJECTION SCREEN  
3507548 SCREEN FOR RECEIVING PHOTOGRAPHIC IMAGES  
3501230 THREE-DIMENSIONAL DISPLAY SYSTEM  
3492060 PROJECTION SCREEN  
3479111 THREE-DIMENSIONAL PICTURE PROJECTION  
3471216 ARRANGEMENT ON ICE-SKATING ICE  
3442508 THEATRICAL STAGE SETTING FOR COMBINING MOTION PICTURES AND LIVE ACTION  
Matches 301 - 350 out of 367 < 1 2 3 4 5 6 7 8 >