Abstract: An article of protective apparel can include a first outer shell having a vacuum-formed first material. The first outer shell can include a first cavity, a second cavity, and a channel disposed between the first cavity and the second cavity. The protective apparel can include a first padding piece disposed in the first cavity, a second padding piece disposed in the second cavity, and a first inner layer attached to the first outer shell. the first padding piece and the second padding piece can be disposed between the first outer shell and the first inner layer.

Abstract: A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has an L shape and may feature a double L shape. A portion inserts into the hollow of a first member and is attached thereto. Another portion extends into the other hollow member for attachment thereto to form a sturdy joint without welding. Pairs of clips may be used at each corner.

Abstract: A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has a double L shape. A portion of the clip inserts into the hollow of a first member and is attached thereto. Another U-shaped portion defining the bottom of the double L extends into the other hollow member for attachment thereto to form a sturdy joint without welding. The first member may have a slot that receives the clip and the clip may be shaped to conform to the internal surfaces of one or both members. Clips may be used at each corner.

Abstract: A method of transmitting data may include converting a stream of serial data bits into a set of parallel quadrature amplitude modulation (QAM) symbols. The method may additionally include applying a partial discrete Fourier transform-spread technique to transform a block of low-frequency subcarriers into a single-carrier QAM signal. The single-carrier QAM signal may bear information of a first subset of QAM symbols from the set of parallel QAM symbols. The method may additionally include transforming one or more remaining QAM symbols to form one or more subcarriers. Each of the one or more subcarriers may bear information of a corresponding QAM symbol from the one or more remaining QAM symbols. The method may additionally include generating a hybrid signal that includes the single-carrier QAM signal and the one or more subcarriers. The method may additionally include transmitting the hybrid signal.

Abstract: A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has an L shape and may feature a double L shape. A portion inserts into the hollow of a first member and is attached thereto. Another portion extends into the other hollow member for attachment thereto to form a sturdy joint without welding. Pairs of clips may be used at each corner.

Abstract: A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has a double L shape. A portion of the clip inserts into the hollow of a first member and is attached thereto. Another U-shaped portion defining the bottom of the double L extends into the other hollow member for attachment thereto to form a sturdy joint without welding. The first member may have a slot that receives the clip and the clip may be shaped to conform to the internal surfaces of one or both members. Clips may be used at each corner.

Abstract: A method of transmitting data may include converting a stream of serial data bits into a set of parallel quadrature amplitude modulation (QAM) symbols. The method may additionally include applying a partial discrete Fourier transform-spread technique to transform a block of low-frequency subcarriers into a single-carrier QAM signal. The single-carrier QAM signal may bear information of a first subset of QAM symbols from the set of parallel QAM symbols. The method may additionally include transforming one or more remaining QAM symbols to form one or more subcarriers. Each of the one or more subcarriers may bear information of a corresponding QAM symbol from the one or more remaining QAM symbols. The method may additionally include generating a hybrid signal that includes the single-carrier QAM signal and the one or more subcarriers. The method may additionally include transmitting the hybrid signal.

Abstract: A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has an L shape and may feature a double L shape. A portion inserts into the hollow of a first member and is attached thereto. Another portion extends into the other hollow member for attachment thereto to form a sturdy joint without welding. Pairs of clips may be used at each corner.

Abstract: A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has an L shape and may feature a double L shape. A portion inserts into the hollow of a first member and is attached thereto. Another portion extends into the other hollow member for attachment thereto to form a sturdy joint without welding. Pairs of clips may be used at each corner.

Abstract: A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has an L shape and may feature a double L shape. A portion inserts into the hollow of a first member and is attached thereto. Another portion extends into the other hollow member for attachment thereto to form a sturdy joint without welding. Pairs of clips may be used at each corner.

Abstract: A clip for assembling corners of hollow members such as the rails and stiles of an extruded aluminum door. The clip has an L shape and may feature a double L shape. A portion inserts into the hollow of a first member and is attached thereto. Another portion extends into the other hollow member for attachment thereto to form a sturdy joint without welding. Pairs of clips may be used at each corner.

Abstract: A sun shade or light guide generates electricity via a wind-driven movable element, such as a turbine, which drives an electrical generator/alternator. The turbine and/or a fan may be interposed between shade elements for driving one or more generators. The generator may be driven directly or may be mechanically coupled to the movable element. Electricity produced by the generator may be stored in a battery and or used immediately.

Abstract: A sun shade or light guide generates electricity via a wind-driven movable element, such as a turbine, which drives an electrical generator/alternator. The turbine and/or a fan may be interposed between shade elements for driving one or more generators. The generator may be driven directly or may be mechanically coupled to the movable element. Electricity produced by the generator may be stored in a battery and or used immediately.

Abstract: A color television or video system for processing signals from a television camera, in which a number of different signals corresponding to images of different colors give rise to different color partial images superimposed on the television screen to form a single full color image. The signals are processed so that the partial images superimposed on the screen correspond to images seen by the camera at time separated by predetermined intervals, so that the partial images of an object moving relative to the camera are displaced relative to one another on the television screen to give a stereoscopic effect when the different images are presented to different eyes of the viewer. To give an optimum effect, the displacement of the partial images should be in a direction appropriate to the direction of horizontal movement in the screen.

Abstract: A method of recording an image of a scene onto cinematographic color film comprises forming a number of successive partial images through a single lens system onto each single frame of the film, the successive partial images being recorded in light of different characteristics, for example different colors. The film is projected using a conventional projector, and when viewed through appropriate filters, gives a stereo scopic effect. To get an optimum effect, the sequence in which the images are recorded should be appropriate to the predominant direction of horizontal movement in the scene. Accordingly in one form of the invention, each image is divided into a number of areas, each area in successive images being recorded in light of different characteristics, and each image having different areas recorded in light of different characteristics.

Abstract: A method of recording an image of an object onto cinematographic color film comprises forming a number of successive images of the object through a single lens system onto each frame of the film, the successive images being recorded in light of different characteristics, for example different colors. In a preferred embodiment, each frame of the film is exposed successively to light of two or three different colors. The film is projected using a conventional projector, and when viewed through spectacles consisting of two appropriate filters gives a stereoscopic effect. The method can be used to produce a film which can also be viewed without spectacles, and is found to give enhanced sharpness and color saturation. The invention also includes a moving film camera having a mechanism for interposing a number of filters in the optical path successively during exposure of each frame so that successive images are overlaid on each frame.