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: 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: 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 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: 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 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: 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 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 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 fishing lure for improved securement of the bait to the hook comprising a hook of an essentially rigid material which has a central linear portion and a curved portion at the outboard free portion terminating in a barb at the free end and an upturned inboard portion terminating in a first eyelet. A head is formed of a material which has a specific gravity greater than water to allow, when coupled with the hook, the sinking thereof. The head is in an oval shaped configuration and covers that portion of the inboard and central portions of the hook where the inboard portion bends from the central portion. The first eyelet is located at the inboard end of the hook exterior of the head. A generally cylindrical extension extends outboardly from the head along a minor extent of the central portion of the hook. The outboard end of the cylindrical extension terminates in a radial projection to assist in maintaining the bait on the hook in contact with the cylindrical extension of the head.

Abstract: A utility knife comprising, in combination, a handle having a first handle portion and a second handle portion and coupling means to releasably join together the handle portions so as to be readily grasped by an operator during use, a central plane extending longitudinally through the handle and defining on opposite sides thereof a first blade-receiving chamber in the first handle portion for receiving a first blade holder and a second blade-receiving chamber in the second handle portion for receiving a second blade holder; and a first blade holder located in the first handle portion for supporting a first blade and a second blade holder located in the second handle portion for supporting a second blade, the blade holders being independently reciprocable in planes parallel with the central plane but on opposite sides thereof, each blade holder having an individual actuator extending to exterior of the handle whereby an operator may move either blade holder or both between a retracted inoperative orientation w

Abstract: A precision bending press for relatively short pieces of sheet metal includes a pair of tool-holder beams one of which is movable towards the other in order to follow a working path in the general common plane of the beams. The movable beam is subdivided, at least virtually, into a number n of segments and is controlled by a plurality of actuators of a number at least equal to n+1. The actuators are connected to a reaction structure stressed by the overall forming force created by the actuators. The actuators are controlled by means of a processing unit which receives signals indicative of the relative punch--die position generated by position transducers supported by an auxiliary structure which is not affected substantially by the deformations of the reaction structure caused by the bending force. The reaction structure comprises a single pair of lateral uprights connected to one another by a connecting beam and by the fixed tool-holder beam.

Abstract: A primary gas supply circuit and a secondary gas supply circuit are provided with the primary circuit having a part in common with the secondary circuit. The primary circuit is provided with a source of hardening gas. A sand foundry part containing a binding agent is provided in the part in common with the primary and secondary gas supply circuits. Through the primary gas supply circuit a hardening gas/carrier gas is circulated through the sand foundry part containing the binding agent. The primary gas supply circuit is closed when the quantity of hardening gas present in the part of the primary gas supply circuit common to the secondary gas supply circuit is an amount corresponding to, or slightly exceeding, the theoretical quantity for a complete hardening reaction. The secondary supply circuit is opened and the hardening gas/carrier gas is circulated through the secondary supply circuit until the hardening reaction has been completed.

Abstract: A disposable marking device particularly suited for marking wires used in orthodontic treatment is disclosed, comprising a shaft made of metal, plastic, paper, wood, or any other material of suitable stiffness, preferably about the size of a toothpick, coated on at least one end with a pigmented binder, preferably a wax or polymer based material, capable of marking metal wires. A method for marking an orthodontic wire is also disclosed.