Two sets of conventional chess men (eight pawns and eight pieces per side) confront each other on three vertically spaced boards of four by six squares each, with the middle board offset from the substantially aligned top and bottom boards to provide three freely accessible playing surfaces on which the men may move longitudinally, laterally or vertically (from one board to another) according to predetermined rules.

A varifocal mirror is typically comprised of a thin aluminized Mylar film that is stretched over a loudspeaker driven sinusoidally at low frequencies. When an object is placed a short distance from the film and the film is oscillated, the position of the image of the object in the mirror will be constantly swept back and forth in the image space with an amplitude typically several times the mirror displacement. In the system herein described a first varifocal mirror is used to sweep an image of ...

A three-dimensional hologram producing camera utilizing a single lens system for providing a volumetric image on bulk sensitive film having a zone plate positioned in front of the lens to provide greater resolution to the recorded image point formed as a volumetric biconically shaped light distribution in the film bulk.

A background of relief configuration suspended from the top edge of an aquarium behind its rear glass panel. The background is formed of relatively stiff material with high portions held in engagement with the outer surface of said panel, and depressed portions forming cavities, peripheral portions of the background being spaced from said panel and communicating with said cavities to provide ventilation, some depressed portions supporting electric light sockets with bulbs disposed within said ca...

Three-dimensional stitchery creations are formed according to predetermined stitchery methods on apparatus compromising a base member having dimensions of height, width and length according to the three-dimensions of the stitchery creations formed thereon. The base member has a plurality of surfaces over which are distributed a multiplicity of projections about which stitchery materials may be looped and woven on a given surface and from one surface to another according to the predetermined stit...

A composite pictorial representation having a three dimensional effect, which comprises a relatively deep frame structure adapted to receive and enclose a relatively thick composite picture that is made from a number of copies of a photograph or the like having background, middle ground and foreground subject matter therein, and wherein certain copies of the photograph are cut or trimmed so that only the middle ground and foreground subject matter remain, and the middle ground and foreground por...

A puzzle is described in the form of a three dimensional body, the exterior of which is preferably a cube and composed of eight elements, having their exterior surfaces forming the body, such as a cube, the constituent parts of which do not form the exterior appear to be readily separable, the elements being in pairs diagonally and slidably separable, the pairs when in extended positions permitting complete disassembly, assembly being achieved by a reversal of the disassembly.

A three-dimensional seismograph recorder having three linear velocity transducers disposed with their axes at relative right angles and their outputs connected to a circuit for computing the square root of the sum of the squared transducer output signals, the so-computed resultant velocity signal being used to drive a single arm recorder. A record time base is established by a timing circuit that pulses a second stylus at regularly predetermined intervals. If desired, displacement information is...

The present invention relates to a model, and the making of such model, of subsurface features of the earth, utilizing a plurality of processed seismic sections spaced apart in a manner representing the disposition of the seismic profiles along seismic survey lines from which they came. The technique facilitates the making of interpretive geological judgements, and is of particular utility when direct indications of hydrocarbons exist.

There is described a three dimensional clamp for holding a plurality of rod-like elements in various relative positions and angles. The clamp body has two opposed clamping sections aligned along a longitudinal axis and joined by an obliquely extending intermediate section or strip. The two opposed clamping sections have respective tongues extending along opposite sides of the intermediate strip but normally slightly spaced from the strip so that a clamping screw passing through both tongues and ...