A three-dimensional word game comprising a 3.times.3.times.3 cube for receiving letter pieces, there being 26 letter-receiving spaces disposed on the surface of the cube. One letter of the alphabet may be associated with each of 26 letter pieces. In playing the game, players take turns placing one or more letter pieces onto the cube. Words are spelled out by tracing a path between consecutively adjacent letter pieces.

A depth perception television system is described. Light radiation from a three-dimensional scene is collected by a convergent lens and transmitted through a lenticulated grid onto the face of a light radiation sensing tube of a television camera. The lenticulated grid is made up of a multiplicity of vertically oriented lens elements, each of which has a generally cylindrical arc incident surface and a generally planar exit surface. Such lenticulated grid acts to separate light radiation receive...

Apparatus and a method for making an X-ray photograph of an object wherein the photograph, when viewed through a lenticular screen or other similar device, will provide a three-dimensional picture of the object and the interior parts thereof. The method is carried out by successively directing the X-ray beams from an elongated continuum of point sources of X-rays through the object, then through an improved parallax grating, and finally onto the film. The grating is formed of a plurality of spac...

A three-dimensional puzzle in which movable blocks are arranged within a substantially closed housing, each of the blocks having the same exterior shape as the housing and the total number of movable blocks being one less than the number required to completely fill the housing so that a void is defined equal in volume to the volume of one of the movable blocks. Each of the blocks has surfaces colored in a predetermined pattern, and each block is movable, by finger pressure exerted through a seri...

A three-dimensional projection system is provided by projecting a two-dimensional image upon a screen from a first image generating source and by additionally projecting from a second image generating source, an image suspended in space to a viewer with the latter image being created either by transmission through the screen or by reflection from the screen.

A process generates and displays representations of various entities--solid objects, scenes, graphs, lines, and points--in true three dimensional space (3D) space. A series of segments of thin transparent film are marked with respect to reference elements of the film segments to correspond to a series of sections of an entity. The segments are assembled spaced apart in corresponding sequence in an apparatus for display, aligned therein by their reference elements, and illuminated by a diffuse su...

A display system for indicating in three dimensions and to a selected scale the position of a remotely observed body or bodies in three dimensional space, the system employing a three dimensional display region and at least two spaced, trainable laser beam assemblies, each of which directs a laser beam along a line which simulates to scale a line of actual direction to the body being observed, and the position of a body being indicated by spot illumination occurring at the intersection of the tw...

A three dimensional structure comprises a plurality of bars, the end parts of which have, in cross-section, the shape of an equal sided parallelogram two angles of which equal 70.degree.32'. The end parts terminate with a shape defined by two plane surfaces intersecting along a shorter diagonal of said parallelogram, each plane surface making an angle of substantially 54.degree.44' with a plane through said shorter diagonal and cutting the end part in two, said shape consisting of a pair of equi...

In a three-dimensional sheet puzzle, puzzle pieces fit together to form a shell held by magnetic attraction to a ferromagnetic base. The puzzle pieces are formed from sheet material which lies flat without strain. The shapes of the pieces are slightly distorted when applied to the spherical base. The puzzle is produced by first forming a flexible cover on the base, cutting the cover into pieces, flattening the resulting pieces, cutting pieces from flexible flat sheet material conforming in shape...

This invention relates to a picture frame assembly adapted to afford a depth dimension to a picture mounted therein. The picture frame assembly includes a frame member having bottom and side walls, a mat member having a top containing a window opening and having downwardly depending inner and outer side walls telescopically arranged within the frame member, and picture mounting means having vertical support flaps arranged between the top and bottom walls, whereby a picture mounted on the picture...