Abstract: The invention provides a three-dimensional puzzle which consists of a box-like casing and a number of flat plate-like game pieces that are freely movable relative to each other within a closed system defined by the casing. The game pieces are, distinguishable from each other by markings such as symbols or color.The casing is a substantially closed, shape-rententive hollow body of the shape of a geometric solid bound by lateral faces. At least four such lateral faces are identical to each other in size and shape. The interior of the casing serves as a game space for the enclosed game pieces. The game pieces are of a shape that is substantially identical to that of the at least four lateral faces of the casing and are laid out in size so that they are permitted free movement within the game space.

Abstract: A clamping device for releasably clamping an article has a pair of arm members. Each arm member has a clamping jaw at an end thereof. The arm members are arranged with the clamping jaws in opposition and are interconnected kinematically to enable movement relative to each other in a predetermined direction to attain a self-locking relationship. A spring assembly is provided coupled to the arm members for urging the clamping jaws toward each other to grip the article. A loose fit linear guide is arranged parallel to and a predetermined distance from a line along which a clamping force of the clamping jaws is exerted on the article. The spring assembly is pre-stressed and located in close proximity to this slide guide.

Abstract: A logical toy containing movable and/or rotatable elements or element groups, the path of motion or axis of rotation thereof, including sensors staying in an actuating forced connection directly or through a mechanic transmission. One or two circuit switches are suitable for closing and opening the path of electric, magnetic or optical signals, which form, individually or in groups, one or more logical nets serving as signal transmitters. The outputs thereof are connected directly through mechanic connecting elements (4, 5, 9, 11) to an electric counter (2). The sensors, i.e. the signal transmitters (1) containing the sensors, can be connected to an electronic chronometer (6). One or more axes of the toy are hollow or tubular, and the sensors and/or their leads are arranged in the inside of the tubular axes (22) and/or in the hollow of the center-plate elements (18).

Abstract: The invention relates to an aircraft structure to make possible take-off and landing on a pilot's feet. The aircraft structure according to the invention can be regarded as a category between kite-shaped aircraft structures and light structures. The gist of the aircraft structure of the invention consists in providing freely supported or outerly reinforced wings (12) adapted to be moved by a pilot (15) actuated mechanism, in their own plane during flight.

Abstract: An array of plate-like elements is retained by endless filaments looped on the elements to form migrating hinges between individual elements and other elements adjoining same. Grooves are formed in the surfaces of each plate, the grooves being in two groups, with the members of each group being mutually parallel, and the grooves of each surface being in overlying registration. The filaments lie within the grooves in a selected pattern, with filaments forming anchor points at plate sides at which the filament wraps around the side of the plate to enter a groove from the other group of grooves on the opposite side of the plate, and hinge points at plate sides where the filament passes from one plate to an abutting plate, proceeding from one surface to the opposite surface in doing so. Manipulation of the resulting array allows two such plates to rotate mutually about an axis defined by hinge points lying on their abutting sides.

Abstract: A composite array consists of plate-like elements or solid bodies interconnected by endless filaments. The front and rear surfaces of each element are provided with grooves, the grooves being divided in two groups, with grooves of each group running parallel with one another. The filaments lie within the grooves and are not attached to the elements. The filaments are arranged upon the elements so that each filament, upon reaching a lateral side of an element, is led into a groove on the opposite surface of the array. If the lateral side lies at the outmost edge of the array, the grooves are of different direction, while at lateral sides forming a line of contact, the grooves run in the same direction. On one or both surfaces of the elements, markings, numbers, letters, text or pattern elements may be found, for differentiating and determining the elements' positions.

Abstract: Framework truss with changeable cantilever length, comprising an articulated grid structure which is hingedly secured at two fixed points against a wall or any other carrier element. Said framework truss is characterized in that at least two articulated grid panels are joined together having the shape of a parallelogram and projecting in the cantilever direction (L) from two fixed articulation points (A, B) situated at a certain interval (h) from each other. The articulated grid panels are comprised of parallel articulated bars (21, 22, 23, 24, 25 and 26), as well as coupling rods (31, 32, 33) connecting them by pairs from their ends between the articulation points (C1, D1; C2, D2; C3, D3) and of which the length remains always equal to the interval (h) separating the fixed articulation points (A, B).

Abstract: A logical toy for the arrangement in any desired pattern of numerals, figures or other symbols printed on independent game pieces. It contains one or more lower pushers and upper pushers movable perpendicularly thereto in grooves formed on a bearing plate. The number of lower and upper pushers and the number of the game pieces can be varied as desired. The game pieces can be arranged in directions perpendicular to one another by shifting the pushers. The bearing plate and the pushers are sealed in by a transparent plate, or one provided with apertures, which is attached to the bearing plate in a permanent manner.

Abstract: The invention concerns a shiftable element logical puzzle in the form of a cylindrical body comprised of an assembly of sector shaped cylinder forming elements, said elements forming two identical cylinder halves in the form of upper and lower tiers of six elements each, three of said elements in each tier being identical to each other, but different from the remaining elements, and means joining said elements together to form said cylindrical body and enabling various groupigs of six elements, three from each tier, to rotate relative to the remaining three identical elements about three axes passing through the cylinder body axis but perpendicular thereto.

Abstract: A toy for constructing different geometric shapes has a plurality of hollow prismatic identical toy elements having a triangular base and quadratic faces. The elements are connected at two faces to adjoining elements by spring biased headed pins passing through aligned throughbores in the centers of the two faces to permit relative rotation about axis normal to the two faces. The elements are maintained in any one of a plurality of angular orientations by projections on one of the two faces of each element and depressions in the other face of each toy element.

Abstract: A spatial logical toy in form of a regular geometrical solid, the toy-elements of which are assembled so that halves of the logical toy taken along any axis can be rotated in any direction of any of the spatial axes of the body in relation to the other half. The toy comprises a total of eight toy-elements, seven of which are identically shaped and are designed in such a way, that the corners are directed to the geometrical center of the body forming the spatial logical toy and are formed as profiles with a spherical surface. In the assembled state, between the profiles a hollow connecting element with a spherical surface on the upper part and having a T-shaped cross section is arranged. At the bottom of the hollow part of the connecting elements is a bore and a threaded pivot enclosed by a spring reaching to the bottom of the recess is passed through the bore and the threaded end of the pivot is screwed into a part of the eight toy-element which is directed to the geometrical center of the solid.

Abstract: A spatial logical toy is formed from a total of eighteen toy elements, out of which two sets of eight identical toy elements two connecting elements are provided. The elements of the two sets have cam members with hollows with spherical convex or concave surfaces in-between. The elements are connected by the aid of the cams and the two remaining centrally positioned substantially identical connecting elements each having a T-shape cross-section and when assembled the toy is in the form of a regular or an irregular solid. Fixation is performed by one single screw passing through bores in the connecting elements. In such a manner the toy elements forming the lateral faces of the spatial logical toy can be rotated along the spatial axes and by yielding several variation possibilities the toy is well suitable for stimulating logical thinking activity.