Abstract: A chain which is convertible to a table comprising: a base frame; a seat which is associatable with the base frame such that the seat is supported by the base frame and the seat can be raised and lowered with respect to the base frame; an electric motor assembly for raising and lowering the seat with respect to the base frame; a chair back which is pivotably associated with the seat; and a chair back support assembly, associated with the base frame, for supporting the chair back, wherein when the seat is raised with respect to the base frame, the chair back is positionable over the chair back support assembly in a substantially horizontal position and wherein the support assembly is operable for supporting the chair back in this substantially horizontal position.

Abstract: A tool box combined with an electrical extension cord and other amenities consisting of a tool box having bottom compartment and lid with one corner of the compartment housing an extensible electrical cord and plug which is electrically connected to a plural receptacle source connection housed in the tool box compartment. Additional combinative features, e.g., cup holders, are also included.

Abstract: Apparatus and method for measuring height variations along a directional axis in a roadway surface from a vehicle includes a first sensor for sensing a first distance from the first sensor to a first point on the surface and generating a first signal indicative of the first distance; a second sensor for sensing a second distance from the second sensor to a second point axially separated from the first point on the surface and generating a second signal indicative of the second distance; and a computer for receiving the first and second signals and generating and recording a difference signal indicative of the difference in height of the first and second points, The first and second sensors are operated simultaneously to compensate for vertical motion of the sensors with respect to the surface.

Abstract: A motor control system includes a single, multicompartment enclosure mounted on a skid. The enclosure contains a transformer circuit and a motor controller circuit interconnected so that only external connections to a power source and a load are needed. When the circuits are energized, access to high voltage motor control components and to field replaceable fuses and output selection switches is prevented by a double interlocking mechanism which operates in conjunction with energizing and de-energizing the transformer. The transformer of the transformer circuit includes a tertiary winding disposed radially between a primary winding and a secondary winding. The winding filters electrostatically coupled transients. A conventional electrostatic shield is also used so that the transformer is doubly shielded to electrostatic transients. The tertiary winding is connected to one or more capacitors to filter magnetically coupled transients.

Abstract: An endoscopic instrument includes a rigid outer sheath having an inner sheath received therein. The outer sheath has a lateral window defined therein near a closed distal end of the outer sheath. The inner sheath carries a telescope and a laterally transmitting laser fiber tip. The laser fiber tip may be extended to a position laterally adjacent the open window while the telescope remains located proximal relative to the tip and the window, so that the tip and the tissue to be treated may be observed with the telescope while both the telescope and the tip remain within the outer sheath.

Abstract: A wheel assembly for use on a race car. The wheel includes a center piece having an outer portion adapted for attachment to a rim portion of the wheel, a hub portion adapted for engagement with an axle of a race car for mutual rotation therewith, and a transitional portion integrally interconnecting said outer portion and said hub portion. The hub portion is axially offset from the outer portion in a direction toward the axle. In one embodiment, the transitional portion includes a radiused transition area between the outer portion and the hub portion. In a second embodiment, the transitional portion includes an arcuate member extending from the outer portion to a substantially axially centered area on the hub portion. Radially extending webs may be provided for reinforcement between the hub portion and the outer portion. One of the disc and transitional portions defines a plurality of lightning holes therethrough.

Abstract: An improved process and apparatus for reducing NO.sub.x content of flue gas effluent from a furnace, the improvement comprising a burner assembly having a burner and flue gas recirculating system for collecting and passing internally recirculating flue gas into a combustion zone for reaction with a combustion flame. The burner preferably has a plurality of fuel dispensing nozzles peripherally disposed about the combustion zone to aspirate collected internally recirculating flue gas into the combustion zone, and has a plurality of fluid driven eductors to drive further amounts of collected internally recirculating flue gas into the combustion zone.

Abstract: A method for cleaning a prosthesis in a microwave oven. The inventive method preferably uses a container having an opening at the top thereof, a cover which is removably positionable over the opening, and a holding assembly removably positionable in the container, for holding the prosthesis. Since most prostheses contain at least somes metallic parts, the container and cover are each composed of a microwave insulating material. The inventive method provides for the quick and efficient cleaning of prostheses and facilitates the removal of dangerous fungal and bacterial deposits therefrom.

Abstract: A switching system for an electric guitar using bridge and fingerboard humbucker pickups and an intermediate pickup provides for ready selection of distinct groups of Gibson tonalities and Fender tonalities. A four pole, five position switch for tone selection provides one-of-ten tonality selection in conjunction with a dual pole, double throw switch.

Abstract: An attachable rear viewing vehicle mirror for viewing inaccessible areas about a motor vehicle. The device consists of a uniplanar support frame attachable by suction cups and extending support arms at an obtuse angle thereto for adjustably supporting a wide angle mirror.

Abstract: An additive for addition to conventional well treatment fluids to enhance the ability of the fluids to be recovered from subterranean formations, to generate a foam in association with the fluids and/or to enhance the ability of the fluids to remove water and other connate fluids interlocked with gas in the formations. The additive includes about 25% to about 50% by volume of a microemulsion generating component which forms an acid and/or water external microemulsion when added to the treatment fluid, and about 50% to about 75% by volume of a foaming agent component. The foaming agent component includes at least one nonionic surface active agent having an HLB of from 12 to 22. The additive is particularly suitable for addition to foam fracturing fluids useful for stimulating tight or otherwise unconventional gas formations. Also provided are a gas well treatment composition employing the inventive additive and a method of treating a subterranean formation in which the inventive composition is employed.

Abstract: Apparatus for preventing fragmentation of a rupture disk during pressure relieving rupture and fluid flow through the ruptured disk includes a rupture control assembly for rupturing the disk into a petal having a body and a base for retaining the petal to the rupture disk; protrusions extending from opposite sides of a housing adjacent the rupture disk for retarding motion of generally opposed edges of the petal as the petal is forced away from the ruptured disk and thereby bending the body of the petal into a channel shape; and a protuberance in general alignment with and spaced away from the base of the petal for impacting the channel-shaped body of the petal as the petal is forced away from the rupture disk and converting the kinetic energy of the petal into deformation of the channel-shaped body in order to prevent severance of the base of the petal from the rupture disk.

Abstract: A composite, prestressed structural member, such as a bridge unit and methods of forming such a member. The apparatus includes a plurality of longitudinally extending girders which are transversely spaced and a plurality of adjacent composite units disposed on the girders. Each composite unit has a plurality of beams with a molded deck portion formed thereabove. The beams are positioned transversely with respect to the girders and attached thereto. Additional, longitudinal beams are disposed between the transversely extending beams over the girders. The longitudinal beams are attached to the girders and by connectors to the molded deck. The structure is formed by positioning the girders on a construction support adjacent to a center portion of the girders such that the free ends of the girders cantilever and deflect downwardly. The beams of the composite units are attached to the girders in this construction position. Any gaps between adjacent composite units are filled with a non-shrink, high strength grout.

Abstract: An inspection head for continuous acoustic energy inspection of coiled tubing consisting of a generally cylindrical test head for receiving the tubing longitudinally therethrough while being sealed on each end to maintain fluid couplant circulation. A cylindrical test array is disposed within the head to receive the tubing while directing a plurality of radially aligned compressional wave acoustic sensors and single in-line, angularly oriented shear wave acoustic sensors. Analysis of the various signal returns enables derivation of ovality, inside wall pitting, outside wall pitting, wall thickness, and transverse and/or longitudinal flaws.