Abstract: A sectionalized surfboard, which can be dismantled into sections and rejoined for use. The sections are joined using one or more metal hooks and metal plates with slots in each section on the bottom of the board. On the top of the board there are one or more pairs of top metal plates in each section joined by a vertically installed bolt(s). Inserting the hook(s) into the slot(s) in the bottom metal plate(s) connects the bottom of the board. The top of the board is connected by a bolt passing vertically through a hole in one section's top metal plate and screwed into a threaded hole in the other section's top metal plate. The metal plates extend into the board and are securely bonded to the skin and foam of the boards. The metal plates can also be bonded to any board stringers. In a second version the top is joined using two bolts. Both sections have threaded holes in their top metal plates. A separate third metal plate with two holes is used with the two bolts to join the top of the board.

Abstract: A sectionalized surfboard, which can be dismantled into sections and rejoined for use. The sections are joined using two vertically installed bolts, which pass through two joining assemblies. Each bolt is inserted through a hole in a top metal plate and tightened in a threaded hole in a bottom metal plate molded in a plastic molding, which is glued to the board internal foam and to the top and bottom skins on one section. The bolt also passes through a tube molded in a second plastic molding, which is glued to the board internal foam and to the top and bottom skins of the other section. The two joining assemblies are installed near the sides of the board.

Abstract: A sectionalized surfboard, which can be dismantled into sections and rejoined for use. The sections are joined using a vertically installed bolt or pin. The bolt or pin is inserted through holes in metal plates mounted securely to the stringer on one section and a tube mounted securely to the stringer of the other section.

Abstract: An audio signal is time-compressed and injected as a buried audio signal into one or more selected line-scanning periods of a video signal, preferably during the vertical blanking portion of each field period. An encoding circuit for performing this function includes a memory device and a clock generator for providing to the memory device a high-speed clock signal during the selected line-scanning periods of each field period, and a low-speed clock signal during the remainder of the video signal. In the encoding circuit, a continuous audio signal is written into the memory device at low speed during substantially all of each field period and is read out therefrom at high speed during the selected line-scanning periods as a buried audio signal.

Abstract: A video projecting apparatus for projecting a compound image onto a projection screen includes a single cathode ray tube having a face plate with red, green and blue color phosphor screens sequentially arranged thereon, for example, in the horizontal line scanning direction, and an electron gun for generating an electron beam to sequentially scan the color phosphor screens as the beam is modulated by respective red, green and blue color components of a video signal; a source of a video signal; a memory device for simultaneously storing at least the red, green and blue color components of the video signal at a first rate during each horizontal line scan period; and a transmitting device for sequentially transmitting from the memory device, at a second, faster rate during the next horizontal line scan period, the red, green and blue color components earlier stored in the memory device for modulating the electron beam in the cathode ray tube as the beam sequentially scans the respective color phosphor screens, a