Abstract: The present invention relates to a cooling fluid for metal cutting, drilling, grinding and other fabricating operations comprising a compound of the formula C.sub.6 H.sub.4 (OH)COOR, where R is selected from the group consisting of --H,--CH.sub.3, --C.sub.2 H.sub.5,--C.sub.3 H.sub.7, and --C.sub.4 H.sub.9, a ketone with a boiling point of at least about 150.degree. F., and an at least partially soluble acid.The present invention also relates to a process and fluid product made by a certain process for cooling tools and workpieces for metal cutting, drilling, grinding and other fabricating operations comprising the steps of mixing a compound of the formula C.sub.6 H.sub.4 (OH)COOR, where R is selected from the group consisting of --H,--CH.sub.3,--C.sub.2 H.sub.5,--C.sub.3 H.sub.7, and --C.sub.4 H.sub.9, a ketone with a boiling point of at least about 150.degree. F.

Abstract: Modifications are provided for both single unit and dual unit inflatable packers or bridge plugs permitting such inflatable tools to be inserted in a well through the primary tubing string which in turn is suitably sealably anchored in the well above the producing formations. The inflatable tool is inserted into the well on a conduit, such as coiled tubing, and fluid pressure transmitted through the conduit is utilized to effect the expansion and setting of the inflatable elements of the inflatable tool. The conduit is connected to the inflatable tool by a fluid pressure operated release mechanism and, following the inflation of the inflatable element or elements, the conduit may be utilized to supply treatment fluid or cementing fluid to a formation isolated by the inflatable tool.

Abstract: Methods and apparatus are provided for retrieving an inflatable packer or bridge plug of a type which may be passed through a small diameter tubing, seal against a relatively large diameter casing by passing fluid to the packer through a remedial tubing to inflate an elastomeric packing element and then be retrieved to the surface through the small diameter tubing by deflating the elastomeric packing element.Circulation may be maintained during run-in through an open port in a centralizer member provided on the bottom of the packer or bridge plug. If the device is used as a bridge plug, the open port is closed by dropping a ball and applying pressure through the tubing to permanently close the open port preliminary to inflating the elastomeric elements.

Abstract: A programmable doorbell system includes a solid state battery powered doorbell controller for connection to existing doorbell circuitry of a house, three segment display, doorbell control circuit, tone generator, control switches, and power source. The programmable controller includes a clock, memory, bell enable control circuit and display control circuit. The three segment LCD display includes a segment for continously displaying the name of the occupant, and two segments for displaying a selected doorbell answering type message. The doorbell control circuit connects the doorbell to the existing doorbell power circuit. The tone generator provides an audible sound as a message attention getter. The control switches include a manual on/off switch connected to the doorbell enable circuit for overriding the automatic mode of operation, and a mode and a change switch connected to the display control circuit for entering program parameters for the programmable controller. The clock provides the time of day.

Abstract: A gas fired convection cooking oven is provided with an improved air delivery and heat exchange structure for creating within the oven's cooking chamber a recirculating flow of heated air to cook food items supported therein. The structure includes a combustion box adapted to receive hot products of combustion from a gas burner, and extending into the cooking chamber through a lower portion of a vertical boundary wall thereof. Removably secured to the combustion box, and extending upwardly along the inner side of the boundary wall is a hollow baffle structure having a front mixing chamber communicating with the interior of the combustion box through spaced apart hollow legs with a discharge opening formed therebetween. Perforated skirt walls extending rearwardly from the mixing chamber define with the boundary wall a fan chamber which surrounds a motor-driven centrifugal fan impeller supported on the inner side of the boundary wall.

Abstract: A method is disclosed for making a resilient cast by using impression material to fill any mold, such as an impression of an enucleated eye socket, an impression of the oral cavity, an impression of the tissue bearing surface of a denture, or any other mold in which it would be advantageous to have a resilient model on which to acomplish work. More specifically, a unique method and apparatus for performing a wide variety of procedures relating to the fabrication, repair and equilibration of dentures is provided. A non-reversible hydrocolloid impression compound, such as alginate, is used to form resilient denture casts supported on a support platform to provide a stable work surface. A similar support platform is incorporated in the base of an articulator, used for the mounting dentures in centric relationship directly from the patient's mouth in a method for correcting of occlusal discrepancies.

Abstract: To inflate the balloon element on the distal end of a pulmonary artery catheter an improved gas syringe is provided which is both volume and pressure-limited so that the syringe is capable of discharging into the catheter no more than the maximum design gas inlet volume thereof while at the same reducing the maximum attainable pressure within the catheter to a predeterminable level substantially below that reached when a conventional volume-limited syringe of the same gas discharge capacity is used. The syringe volume delivery limitation is achieved by forming rearwardly disposed plunger stop members, or a suitable vent opening, in a sidewall portion of the syringe body. The pressure limitation is obtained by forming a pressure absorption zone which defines a substantially inextensible enlargement of the gas-receiving interior of the catheter.

Abstract: Disclosed is a back support device. The back support device includes a bonnet adapted to be connected to a seat back. A pair of spaced apart flexible guide straps is connected to the bonnet and at least one inflatable support cushion is slidingly mounted on the guide straps so as to be positionable at any desired location along the guide straps to provide support for a portion of the body of a user.

Abstract: The elevated, open-topped housing of a solid fuel-burning barbecue grille is provided with a hinged top lid and upper and lower swing-out doors which respectively carry horizontally disposed food and solid fuel-supporting grate structures that are moved out of and into the housing interior, through framed housing side wall openings, as the doors are opened and closed, thereby permitting food items to be placed on the upper grate, and charcoal to be placed on the lower grate, externally of the housing and without lifting the housing lid. To prevent cooking heat escape from the housing interior when the upper door is opened, a hinged flap automatically pivots downwardly to cover the upper door opening when the upper door is opened. When the upper door is closed, an interior tab member theaid vent pipe in a selected one of said open and closed positions thereof.

Abstract: This invention relates to a method for achieving a seal by an expandable packing element having a generally tubular configuration and being fabricated from elastomeric material adapted to be utilized in conjunction with a packer apparatus within a well bore conduit during the completion or workover of a subterranean oil or gas well. Preferably the packing element is formed from a resilient elastomeric material such as ethylene propylene diene monomer adapted to withstand elevated temperatures and high pressures in subterranean wells. The tubular body member has an imperforate protective coating at least over its exterior surfaces, the coating being resistant to exposure to steam and hydrocarbons at elevated temperatures for extended periods for protection of the body member prior to its controlled expansion into well sealing relation, said coating becoming imperforate by said expansion.

Abstract: The hyperthermia treatment apparatus includes an invasive microwave array of applicators with destructive and coherent phase. The desired power phase shift is obtained either by (1) insertion of pre-calibrated phase shift modules or cables, (2) adjustment to the phase of an in-line electronic phase shifter, (3) adjustment of mechanically movable phase shifters such as ferrite or sliding length coaxial line stretchers. A computer provides the proper selection of radiated power for each applicator using a look up table of pre-treatment planning software calculations, and the adjustment of power levels to that determined by the pre-treatment plan. At least one applicator is centrally located with respect to applicators located peripherally.

Abstract: A method and apparatus are provided for use on a subterranean well gravel packing conduit. The apparatus incorporates a cylindrically shaped inner tubular member having an interior wall and an exterior wall. A fluid flow passageway is defined within the interior wall of the tubular member and fluid flow passage means extends from the interior of the tubular member through the exterior wall and communicates with the fluid flow passageway. In a preferred embodiment, an outer fluid-porous means, or particulate restricting means is carried around the exterior wall of the tubular member having its interior facing the tubular member.

Abstract: An exercise machine adapted to simultaneously strengthen the user's body and develop his sense of balance includes an elongated, horizontally disposed frame structure having front and rear ends and a spring-mounted, padded body rest section extending longitudinally along an upper side portion thereof. The frame structure is supported in an elevated position by front and rear support leg pairs pivotally connected at their upper ends to the front and rear frame structure ends on opposite sides thereof. Each of the support legs is pivoted adjacent its midpoint and is spring-biased to a straightened position. The front legs are provided with handgrips which, when twisted, operate push-pull cable structures to rearwardly bend the legs. The rear legs may be rearwardly bent using similar push-pull cable structures operated by stirrup-like foot pivot mechanisms.

Abstract: A cooking appliance includes a heating source to provide heat to a cooking medium for cooking food, temperature sensing circuitry for detecting the cooking medium temperature and control circuitry connected to the temperature sensing circuitry for cooking the food according to data stored in the control circuitry by controlling the heating source and removing the food from the cooking medium in accordance with the data. A temperature sensing apparatus is also disclosed that includes a temperature probe for measuring temperature and a reference circuit indicating a referenced temperature. Circuitry is alternately connected to the temperature probe and the reference circuit for alternately providing a first and second output signal indicative of the measured temperature and the referenced temperature respectively. Data processing circuitry is also provided that receives the output signals and computes the measured temperature from the first and second output signals.

Abstract: A method and apparatus for effecting the completion of non-vertical, including horizontally disposed, portions of a deviated well bore traversing a production formation. To facilitate the insertion of a gravel packing tool string through the curved portion of the well bore, stabilizer elements are maintained in a radially retracted position and then operated to engage the well bore after the tool string is run-in. An anti-rotation tool may be incorporated for connecting the work string to the left hand threads conventionally provided on a conventional packer in order to permit rotation of the entire tool string to facilitate passage through the curved portion of the well bore. Two gravel packing modifications are disclosed, the one employing a single packer and a cross-over tool located at the top end of a plurality of serially connected screens.

Abstract: Portable cargo loading apparatus capable of being placed into the hold of a ship for loading and unloading cargo respectively to and from the wing areas of the hold. Comprising the apparatus is a loading section formed of three large area relatively slidable trays arranged in a nesting relation capable of being power extended and retracted in a controlled operating sequence. During tray extension, cargo which has for example been delivered by a dockside crane directly into the uppermost tray is relocated by the apparatus from the delivery location for placement into a paired loading site within the wing. After loading of a localized wing site is completed, a transport section is operable to enable incremental lateral displacement of the loading section to a new paired location relatively juxtaposed to the wing site in which loading was just completed.

Abstract: Method and additive are provided for clarifying an aqueous system which may contain an oil-in-water emulsion, a dispersion of a non-aqueous discontinuous phase, without production of a resultant uncontrollable floc in the system, by contacting the system with an effective water clarifying amount of a composition having present a dithiocarbamate of bishexamethylenetriamine, said dithiocarbamate having the formula: ##STR1## wherein: R is hydrogen, an alkali metal, an alkaline earth metal, ammonium, ion or an amine, the ratio of carbon disulfide to primary amine for said dithiocarbamate of bishexamethylenetriamine is approximately stoichiometric. The composition is maintained in the system for sufficient time to effectively clarify the system without production of an uncontrollable floc.

Abstract: A series of bags are fabricated using a continuous, high-speed bag-forming process is which an elongated section of flattened film tubing is longitudinally conveyed toward a receiving station in which the formed bags are suitably packaged. As the flattened tube is moved toward the receiving station, elongated plastic film tie elements are sequentially formed and welded along relatively large area end portions thereof to at least two layers of a side edge portion of the flattened tube at longitudinally spaced locations thereon adjacent the upper end locations of the individual bags, the resulting free end portions of the tie elements overlying the flattened tube.

Abstract: A temperature compensation circuit is provided which can be used for span temperature compensation in an electropneumatic transducer system and which includes a constant current generator circuit coupled to a bridge of piezo resistances in a pressure transducer to supply a constant current through one piezo resistance of the bridge to common. The Electropneumatic Transducer System includes a zeroing circuit, a voltage chopping circuit, a linearity correction circuit, a low-current shut-off circuit, and a high-current shut-off circuit to provide hard turn-ons and hard turn offs of the system at the lower and upper ends of the pressure output range or span. The Electropneumatic Transducer System also includes a voltage railsplitting circuit arrangement to minimize the operating currents and voltages. With these features, the Electropneumatic Transducer System is particularly adapted for use in hazzardous combustible atmospheres where Intrinsic Saftey and accuracy are required.

Abstract: A hand held portable blower/vacuum assembly includes a gasoline engine mounted on a blower housing that is interchangeably operable as a blower or vacuum unit and is symmetrically arranged for right or left hand use. A U-shaped carrying handle is secured to an upper housing enclosing the engine by means of a mounting structure that includes anti vibration elements. For eliminating the effect of both gyroscopic and centrifugal forces, the engine is arranged with the piston and crankshaft in horizontal and vertical orientations respectively, while both exhaust and cooling air are discharged from the front of the unit away from an operator so as to provide a balanced unit operable with either the right or left hand. A multi-position throttle located on the backside of the unit removed from the handle is incrementally settable for operating the unit at preselected fixed speeds.