Abstract: A low cost, extended surface, finned-tube of rectangular cross-section is disclosed for use in single-row bundles of the type used in power plant air-cooled steam condensers. The steel U-shaped fins are metallurgically bonded to the steel tubes by hot-dip galvanizing; aluminum fins would be brazed on. The bottom section of the tubes that flow the condensate have a built-in freeze protection feature.

Abstract: A wheel chock for aircraft comprising a first inverted U-shaped channel member which includes a horizontal upper surface and side surfaces extending downwardly therefrom to form vertical side edges. A first side panel is secured to one side edge of the first channel member and extends horizontally in a first direction with at least one locking hole extending therethrough. An aperture extends through each side surface of the first channel member in axial alignment about a horizontal axis. Both apertures are of a common predetermined diameter. A second U-shaped channel member includes a horizontal upper surface and side surfaces extending downwardly therefrom to form vertical side edges. A second side panel is secured to one side edge of the second channel member and extends horizontally in a second direction opposite from the first direction with at least one locking hole extending therethrough adapted to be positioned in alignment with at least one of the holes of the first side panel.

Abstract: The cyclic Isolongifolanone ketals of the general formula A wherein the wavy lines mean .alpha.- and .beta.-configuration and R,R' mean radicals of hydrogen, methyl or ethyl, are new. With preference they are used either as odorants or as components of perfume compositions. They are manufactured from Isolongifolene which is itself produced from Longifolene as is well known. Isolongifolene is oxydized to Isolongifolene-3-on and this is reacted with aliphatic 1,2-diols in apolar solvents with the separation of water.

Abstract: An apparatus and method for inverting direct current electrical power into alternating current electrical power by producing a moving magnetic field having substantially constant flux density when the direct current power is applied to a primary winding, magnetically coupling a secondary winding to the moving magnetic field and creating a substantially triangular-shaped current in each phase of the primary winding so as to produce substantially sinusoidal alternating current in each phase of the secondary winding.

Abstract: An exercise device for chin-ups which comprises a first support of a rigid material which has a first end and a second end and a mid point therebetween positionable in a horizontal orientation with its ends adjacent to the upper extent of a door opening on the first side thereof. The first support has vertical exterior apertures adjacent to the ends and vertical interior apertures between the exterior apertures and the midpoint. Further included is a second support of a rigid material with a lower horizontal extent positioned upon the upper sill of a door opening on the second side thereof opposite from the first side and with a vertical extent positionable against a vertical wall surface above the upper sill. The board has a first end and a second end a midpoint therebetween with horizontal apertures extending therethrough adjacent to its ends. The length of the second support is less than the length of the first support with the midpoints in a common vertical plane.

Abstract: A device adapted for holding an object comprising, in combination, an exterior component shaped in an inverted generally U-shaped cross-sectional configuration, the exterior component having a resilient upper portion and a lower portion formed of legs and terminating in parallel lines, the legs being movable, upon the application of pressure, to a holding orientation with the parallel lines spaced a distance to preclude the passage of a minnow therethrough, upon the release of the pressure, the legs move to a release orientation with the parallel lines spaced a distance to allow the passage of an object therethrough. A resilient interior component with an upper end adjacent to the upper portion and a lower end adjacent to a location above the parallel lines for thereby assisting in the return of the parallel lines to the release orientation after grasping an object in the space between the short legs and the lower end of the interior component.

Abstract: An electric current sensor employing a Hall effect generator to be used in measuring electrical currents flowing in an electrical conductor. The sensor comprises an amplifier, a constant current source, a gapped toroid core mounted on the component side of a printed circuit board (PCB), a Hall effect generator extending via its output leads from the PCB into the gap of the toroid core, and an inductive loop positioned at the edge of the gap of the toroid core. The inductive loop itself comprises a simple trace formed on the component side of the PCB together with its plated-through-holes extending from the component of the PCB to the printed circuit (clad) side of the PCB. The PCB inductive loop placed at the edge of the gap of the toroid core and connected in series opposition to the output leads of the Hall effect generator, compensates for the unwanted induced voltages in the output leads of the Hall generator.

Abstract: In a frame with a horizontal bed (10) and a vertical upright (12) there is for bracing and stiffening a vertical rigid wall (14) rigidly with the bed (10) and the upright (12) connected. The bed (10), the upright (12) and the wall (14) are cast as a single piece of a polymerizable resin-concrete. The wall (14) provides the frame with a high bend and torsional stiffness at a low weight. The wall (14) additionally serves to receive guides and bearing arrangements for functional elements of the machine tool, which by this means can be disposed spatially one above the other.

Abstract: An electric autoinflator for inflating inflatable devices such as personal flotation devices, life rafts, buoys and emergency signalling equipment. The electric autoinflator comprises an actuator assembly including a fusible link. A water-sensing electrical circuit and battery supplies electrical current to the fusible link actuator assembly upon immersion in water for a predetermined period of time. Upon fusing of the link, the actuator assembly forcibly causes a firing pin of the inflator to pierce the frangible seal of a compressed gas cartridge. The escaping gas then inflates the inflatable device.

Abstract: An in-store advertising system for displaying advertisements involves preparing graphical art from the actual products or from flat art, for each advertised product. Each frame is stored in computer memory as a digital graphics file. As desired, pricing and advertising copies are added as overlays to the digital art of each frame. Control data is defined for each frame indicating its destination location(s) and the run time for each destination location. The digital graphic files containing a digital frame and the respective control data for each frame are then loaded into an uplink control computer. The control data is analyzed by the uplink computer to compute an adlist which lists the digital frames and their respective destination locations. The uplink control computer is interfaced to a satellite addressable network control system (ANCS) to unmute the desired satellite receiver(s) at the remote location(s), based upon a predefined transmission script.

Abstract: A tarp assembly for container trucks comprising a roll-up assembly that is mounted to the top of a fixed-height gantry framework, the gantry framework being welded to the frame of the truck in front of the tilt frame of the truck. A manual crank assembly is mounted to a bracket extending from a lower portion of the gantry framework and is operatively connected to the shaft of the roll-up assembly by a continuous chain and sprockets.

Abstract: A cylindrical spindle for mounting a bearing or other member that requires lubrication, the spindle having an internal longitudinal passageway for conducting the lubricant to the bearing from an end of the spindle, and having a lateral passageway to receive a cotter pin for locking a nut on the spindle for retaining the bearing in place, the two passageways being nonintersecting with the lateral passageway extending substantially along a diameter of the cylindrical spindle and the longitudinal passageway being offset from the longitudinal axis of the cylindrical spindle.

Abstract: A door, and particularly a door for a vehicle, which door can be made to pivot about two separate axis. The door is provided with first and second sets of hinge assemblies comprising releasable hinge pins and seating receptacles for lodging the hinge pins. Each set of hinge pins define one axis. Release of one set of hinge pins causes the door to be pivotable about the axis of the other set of hinge pins.

Abstract: A continuously operable combustion-type retort apparatus includes an insulated retort. A preheater is preferably associated with the retort for preheating incoming material, and means are preferably provided for injecting acetic acid and steam into the incoming material. Heat is supplied from a combustion zone arranged near the bottom of the retort, wherein means are provided for combusting spent shale to provide the heat necessary for retorting. Means for injecting acetic acid and water are arranged above the combustion zone for preventing the combustion from spreading into the material being retorted. The invention also comprises a method of retorting to produce a very high quality oil from shale and having a 7:1 ratio of carbon to hydrogen, along with the production of valuable nitrogen related chemicals, activated lignin and cement.

Abstract: A method for determining a dominant heart rate from a series of beat triggers representative of a mixed series of normal heart beats and non-arrhythmic activities, with the beat triggers being determined at a specific sampling rate defining sample intervals, comprising the steps of: framing a window to include a portion of the series of beat triggers and to be beat-aligned with a first beat trigger and a last beat trigger, the window thereby defining a plurality of trigger intervals for respective adjacent beat triggers, with each trigger interval containing a plurality of the sample intervals existing between the respective adjacent beat triggers; summing the windowed sample intervals; for each of the trigger intervals, computing a weight factor based upon the ratio of the summed windowed sample intervals to the number of sample intervals within that trigger interval; grouping the trigger intervals according to the weight factors; computing the percentage of the window that each group of weight factors const

Abstract: An apparatus and method is disclosed for an improved air conditioning system for admitting air from an exterior space, adjusting the temperature and humidity of the exterior air, delivering the adjusted air to an interior space of a structure, removal of exhaust air therefrom and return of the exhaust air to the exterior space and wherein a regenerative desiccant is provided for removing water vapor from the air to be delivered to the interior space and delivering the water vapor to the exhaust air stream and a heat exchanger is provided for removing sensible heat from the air to be delivered to the interior space and transferring the sensible heat to the exhaust air stream. The apparatus combines for the first time electric air conditioning reheat and solar energy with desiccant technology, thereby furnishing conditioned air at an 80% reduction of energy cost. The apparatus for the first time allows the use of waste oil heat to furnish conditioned air at an 80% reduction in energy cost.

Abstract: A system and a process for separating impurities such as grease, fuels and solid particulate matter, from water contaminated therewith, comprising passing the water to be treated through a first cleanable strainer bag assembly for filtering solids, a holding/settling tank for separation of an oily and water phase and for precipitation of solids, a second cleanable strainer bag assembly having at least one strainer bag of a porosity finer than the porosity of the strainer bag of said first cleanable strainer bag assembly, a heavy oil gravity separator, a light oil coalescer, a further oil and petrochemical and very fine solid separator with a replaceable polypropylene element for adsorbing or absorbing oil and filtering solids, and preferably also a carbon filter assembly. The invention makes possible the economical removal of impurities and the reclaiming of water with a residual impurities level of less than 5 parts per million.

Abstract: In a digital computer with multiprocessor arrangement, each processor is a highly integrated computer chip on a semiconductor basis connected to the other processors in the arrangement, which are of same design, via highly meshed management system composed of meshes and nodes for transmitting digital signals. Peripheral devices such as keyboards, memories, monitors, image sensors, speech analysis units, speech synthesis units as well as transmitters are connected to the computer. According to the invention, the management system is a beam waveguide network. Each node is associated with a processor to which it is coupled via an optical emitter and an optical receiver. The new types of chip interconnection which result and hence the high packing density of the chips and large number of cross-connections obtained are particularly advantageous. The computer network has a high functional density and the computer and peripherals are unaffected by electromagnetic influences.