The ducting extending a substantial axial length of a gas turbine engine is faired to transition the annular flows of the core engine and fan to a rectangular separate flow in a pair of two-dimensional exhaust nozzles so as to control each flow individually. Each flow is judiciously located to achieve noise control and infrared suppression.

A three-dimensional puzzle comprised of matchable pieces each having a flat base to form a tabular surface when said pieces are matched. The pieces have varying and similar heights and contoured surfaces to generate a sculptured or three-dimensional subject. The puzzle may be in the form of a subject formed from a single aggregation of pieces or may be in the form of connected but independent aggregations of pieces as in the case of connected hemispheres forming a geographic globe structure in r...

A three-dimensional lift intended for use by a handicapped person, providing him with three dimensions of mobility within a room or rooms. The invention consists of uniform channels or rails secured in parallel configuration adjacent to or on a room ceiling with a traveling bridge arranged to traverse the length of the channels, and incorporates with the bridge a head mounted to travel thereacross spanning the room or rooms with a sling suspended therefrom to move vertically, supporting the hand...

Apparatus for detecting whether a measured dimension deviates from a nominal value by a predetermined increment. It comprises a feeler for following the surface of a component and a variable area window controlled by said feeler. Two pairs of photoelectric receivers are located behind the window and the photoelectric receivers of each pair receive differential illumination through the window. An electronic circuit includes a first trigger circuit which receives as input signal the differential o...

A two-dimensional scanning device constructed with first deflector to deflect a collimated beam, second deflector to deflect an incident beam in the direction orthogonally intersecting the deflecting direction of the first deflector, a scanning lens interposed between the first and second deflectors, a scanning plane to focus a scanning beam from the scanning lens through the second deflector, and an expedient to obtain a distortion-free two-dimensional scanning pattern on the scanning plane by ...

Decorative articles having a three-dimensional patterned surface are formed employing the different surface tension properties of a wet ink printed pattern and a liquid top coat composition; the difference in surface tension is such that the liquid top coat composition retracts from the wet ink pattern; subsequently the ink is dried and the top coat is dried and cured.

A two-dimensional scanning apparatus is disclosed which includes first deflector for deflecting a collimated beam, second deflector for deflecting the incident beam in the direction orthogonal to the direction of deflection by the first deflector, a scanning lens disposed between the first and second deflector, a surface to be scanned on which an image of the scanning beam is formed through the second deflector and a device for moving the scanned surface in the direction orthogonal to the surfac...

A cooperating flap moveable axially and radially and a collapsible plug in a two-dimensional nozzle for aircraft powered by a gas turbine engine serves to maximize nozzle performance for subsonic, supersonic and speeds therebetween.

This invention utilizes a series of two-dimensional photographs of successive cross-sections of an object. The photographs are arranged on a film strip in the order in which the successive sections appear in the object. The film strip is transparent and is intermittently illuminated as the successive frames of the film strip move across an optical path. A projection screen in the optical path is moved with respect to the optical path so that as each successive photograph is illuminated, that pho...

A luminous spot in a model area displays the position and movements of an object in space by means of apparatus which receives a location signal, such as a radar signal, indicative of the instantaneous coordinates of the object with respect to each of three axes of a system of coordinates in the space. The apparatus includes an oscilloscope and a thin, converging lens which is rotated about an axis parallel to the screen of the oscilloscope and perpendicular to the optical axis of the lens. A po...