A stereo optics apparatus, comprising a zoom lens attachable to a camera body and having an operating element operable when moved in first and second directions to increase or decrease the focal length of said zoom lens, first and second spaced apart movable reflectors facing said zoom lens on either side of and transverse to the optical axis of said zoom lens, said first and second reflectors being movable to change the acute angle included therebetween, third and fourth reflectors facing said ...

A two dimensional logical toy comprises a frame structure having a slide passage in which a slide plate is slidably mounted and on an apertured surface of which a plurality of parallel grooves are formed together with a single transverse groove, a lift including an elongated pedestal slidably and rotatably mounted within the aperture in said slide plate and provided with a platform on one end in which two sets of parrallel grooves are formed, one set of grooves being normally disposed in alignme...

A three dimensional toy includes juxtaposed first and second surfaces. The surfaces contain a discontinuity therethrough. Affixed to the second surface are a plurality of figure-forming elements. The toy is transformable from the first configuration to the second configuration and vice-versa. The transformation is performed by causing the bulk of the toy to pass through the discontinuities in the surfaces. When the toy is in the first configuration, the first surface is on the outside of the toy...

A three-dimensional perfumed seal which comprises a vinyl base sheet, an adhesive layer applied to one surface of said base sheet, a release paper applied to the surface of said adhesive layer opposite from said base sheet, a foam synthetic resin padding material disposed on the surface of said base sheet opposite from said adhesive layer, a covering vinyl sheet sandwiching said padding material in cooperation with said base sheet and having a design printed on one of the opposite surfaces there...

In a thermal head, a resistive member forming a two-dimensional pattern to be printed on a thermosensitive recording paper is fixed on plural pairs of first and second electrodes. The first electrodes extend on a surface and are commonly connected at one end to be impressed with a first voltage. The second electrodes extend on the same surface that the first electrodes lie and are commonly connected at one end to be impressed with a second voltage lower than the first voltage. The first and seco...

Display equipment gives a representation of a three-dimensional body. A series of spaced apart panels (28) are mounted to a support structure (30). Each panel (28) carries representations (40) of parts of the three-dimensional body which occur in the plane occupied by the panel. The panels are transparent or open to allow the representations carried by the different panels to be simultaneously viewed by light passing through the panels, thereby giving the effect of seeing the three-dimensional b...

A three-dimensional device for teaching mathematical problems, comprising a stand having a number of open-ended shelves extending therefrom, the surfaces of said shelves being adapted to removably and interchangeably receive slides carrying different digits to set-up various mathematical problems, as conventionally done by paper and pen.

The present invention concerns a tridimensional puzzle comprising elements movable by gravity within a volume limited by the walls of a box. It comprises, more specifically, on the one hand, n identical parallelepipedic elements and, on the other hand, a transparent parallelepipedic box the sides of which are multiples of the sides of one element and the volume of which is roughly equal to that of n+I elements, the volume of one element left vacant in the box allowing the displacement of at leas...

Annular three-dimensional structure formed by regularly criss-crossed filiform elements, divided in a plurality of families of elements occupying the same place within the structure arranged identically within the said structure. In order to have an undelaminatable structure with a selectable space distribution of its mechanical or physical properties, said structure includes two families of helical elements arranged in cylindrical sheets according to helices of identical pitch but of opposite d...

Reflected illuminating radiation is transmitted through a restricted window in an opaque surface undergoing scanning movement to project an image pattern on a closely spaced imaging surface from which the image pattern is reproduced on a viewing screen. The viewing screen is locally variable in transparency to provide images of objects viewed by observers with parallax.