Abstract: A portable table includes a frame that is worn by various size users while standing or sitting and can be used where free-standing tables are impractical for writing, eating and other purposes. Two hooks that telescope longitudinally from the main frame fit over the user's shoulders. A table is affixed rotatingly at a bottom side to the main frame and rotatingly and removably at a top side to a slider which is slidably affixed to the main frame. Moving the slider upward thereby rotates the table surface toward the main frame for storage while moving the slider downward rotates the table surface essentially perpendicular to the main frame for use. The slider can further be locked into place using convention means. In addition, a support bar is affixed rotatingly to the bottom of the main frame and can be rotated toward and affixed to the table in a conventional manner while the table is in use.

Abstract: A parking brake valve includes a magnetically attractable sled containing fluid stoppers and fluid passers that moves along a track, a fluid exchange unit, solenoids at either end of the track and a remote actuator. The parking brake valve is added to an existing hydraulic vehicle braking system. When the existing braking system is actuated, braking fluid is forced through the parking brake valve. Activating a locking solenoid attracts the sled into a fluid interrupting or locking position, thereby locking the brake system in a braking state. Activating an unlocking solenoid moves the sled such that brake fluid can again flow through the parking brake valve, thereby allowing the braking system to function normally. Integral fluid pressure valves allow the monitoring of fluid pressure within the parking brake valve allowing operation to be monitored.

Abstract: A water slide includes a water distributor depressed within the slide surface near the upper end of the slide and one or more sets of water outlets to spread a small volume of water evenly accross the slide surface between two integral side walls. Water is drawn from a pool into which the lower end of the water slide projects and is pumped onto the slide surface through the water outlets using a conventional, inexpensive water pump, hoses and fittings. The dark color of the slide surface absorbs heat from the sun which is then transferred to the small volume of water flowing down the pitched slide surface. A support means and an access means are mounted to the water slide. The lower end of the slide has a steeper pitch, allowing the slide to be supported in various positions. The speed of descent can therefore be adjusted to accommodate various user needs.

Abstract: A document scanner that is able to reliably discriminate and scan the information side of each simplex document of a stack of documents, i.e. The side containing information, even when some of the documents are upside-down.

Abstract: A non-volatile memory is mounted on a cartridge for a thermal printer and includes color correction and carrier defect data which are used by the printer to make prints.

Abstract: The present invention discloses a novel method for effecting illumination of an arbitrary aperture. The method comprises a first step of providing a developed hologram comprising a plurality of spatially known discrete holographic optical elements that have been generated from a common arbitrary aperture. A second step comprises directing a plurality of dedicated reconstructing beams to assigned ones of the holographic optical elements, so that a composite hologram beam illuminates the arbitrary aperture.

Abstract: A light-emitting diode having a structural arrangement that permits efficient external emission of light emitted from the peripheral wraparound portion of the diffusion region.

Abstract: A holographic recording of the interference between an object laser beam and a reference laser beam is used to combine the amplitudes of multiple input laser beams which are conjugates of the reference beam, into a single output laser beam which is a conjugate of the object beam. An optical device in the form of a trapezoidal prism has an entrance top face with a diffusion surface, and an exit base face with a holographic recording made on a light sensitive recording medium of an interference pattern of an object beam incident on the diffusion surface and scattered over the recording medium, in interference with a reference beam simultaneously incident to a side of the prism onto the same medium.