Abstract: An engine driven reciprocating air compressor. The engine is operated in a through scavenge two-stroke mode. The engine has opposed pistons reciprocating in opposition in a cylinder, the pistons being rigidly connected to respective compressor pistons working in compressor cylinders. A crankshaft rotates about an axis perpendicular to and intersecting the engine cylinder axis. The piston pairs are directly coupled to the crankshaft by connecting rods. The crankshaft synchronizes the piston pairs, defines their strokes, and provides rotary motion for auxiliary devices. The connecting rods and crankshaft are lightweight and do not transmit full engine power. The piston pairs are provided with inward return energy from a flywheel on the crankshaft and air trapped in compressor cylinder clearance volumes. The inward faces of the compressor pistons may be used to compress fuel/air mixture to the scavenge pressure.

Abstract: A process for the concentration of hydrated aluminum oxide minerals from raw materials by flotation alone or in combination with magnetic separation using a series of conditioning steps prior to flotation involving dispersion, precipitation and flocculation.

Abstract: Vasoactive polypeptide fractions having biological activity isolated in purified form from animal lungs induce peripheral vasodilation and systemic hypotension. One of the peptides exhibits the property of relaxing isolated non-vascular smooth muscle organs while the other peptide contracted these tissues. The peptide fractions are obtained from the lungs of animals by procedures involving boiling and mincing the lung, extracting the peptides into acetic acid, adsorbing by alginic acid, eluting with HCl and salting out, extracting into alcohol, again adsorbed with alginic acid, fractionating by gel chromatography, e.g. on Sephadex G-25, and by ion exchange chromatography, e.g. on carboxymethyl cellulose, followed by further ion exchange chromatography and, optionally, countercurrent distribution.

Abstract: A drive shield for use in tunnelling operations includes a generally cylindrical cutting edge supported by a frame. A knife shield is telescoped together with the cutting edge, the knife shield having a plurality of elongate members (or planks). Each of the planks is extensible relative to the cutting edge in the direction of tunnel advance. In use, all the planks are advanced relative to the cutting edge which is then advanced in a follow-up sequence.

Abstract: Disclosed are a method of and system for packaging commercially sterile foods by placing the sterile food in a plastic container tending towards opacity to visible light radiation and tending towards transparency to ultraviolet radiation. The container is open and the food product is cooled to a temperature slightly above the freezing point of water preparatory to and while in a chamber having an atmosphere of cooled, dry inert, sterile gas. In the chamber, the inert gas and food product are irradiated by ultraviolet energy that propagates through the container. The container is sealed in the chamber, whereby the inert atmosphere is maintained on the surface of the food product while stored in the container, at temperatures slightly above the freezing point of water for prolonged time periods.

Abstract: An integrated circuit programmable read only memory is arranged in a matrix aving a plurality of memory cells arranged in rows and columns. A particular cell in a matrix is addressed by selecting the appropriate row and column. A destructible memory element connects a column to a row at each intersection. The currents for programming adjacent memory cells corresponding to a row of the memory are diverted by a single path.

Abstract: A piezoelectric transducer is secured to the surface of a glass sheet to translate mechanical vibrations generated in the glass sheet into an electrical signal when a crack is produced. A detection circuit is connected to the transducer to determine whether the frequency of the signal is above or below a predetermined value. If the frequency is higher than the predetermined value, a warning signal is derived to indicate a crack and therefore probably a burglary. Alternatively, the piezoelectric transducer in the transmit mode is excited electrically by an impulse to introduce an elastic wave into the glass sheet. A gate circuit is connected to the transducer to pass signals resulting from reflection of the elastic wave from discontinuities in the glass sheet which result from a crack. The reflected crack indicating signals are passed through the gate to the transducer when it is in the receive mode.

Abstract: A high Q load circuit is automatically matched to a drive circuit with an L network having a series reactance and a shunt reactance, one of which is on a load circuit side of the network and the other of which is on a drive circuit side of the network. The reactance on the load circuit side is of a type opposite to the reactance of the load, while the drive circuit reactance provides an approximate match between the drive and load circuits. Both reactances are varied until the voltage or current magnitude applied by the drive circuit to the network is at least equal to the voltage or current magnitude of the reactance on the input side. Then the reactances are varied until the voltage or current magnitude of the reactance on the input side is slightly less, by a predetermined amount, than the voltage or current of the reactance on the output side. For each unit change of the reactive value of the reactance on the load side, there is a small change in the reactive value of the reactance on the drive side.

Abstract: A mobile tank mounted on a set of wheels is hitchable to the back of a vehicle for transport between a camping area and a remote sewage area. A plurality of cleaning nozzles, interconnected by a conduit, are disposed along the top of the tank. The nozzles extend through apertures in the tank wall to the inside of the tank with sets of nozzle orifices oriented adjacent the inner wall surface. Sewage is removed on-site from each of a plurality of campers or other sewage sources at the camping area and transferred into the tank. The tank is then transported to the remote sewage disposal area for emptying. The inside of the tank is cleaned by supplying water under pressure to the conduit. Water from the nozzle orifices is sprayed against the inner wall surface of the tank. The spray tends to cut into solid sewage caked on the inner wall, and a downwardly flowing film of water established on the inner wall surface washes the sewage out a tank outlet.

Abstract: Shoe support apparatus, particularly for supporting a shoe thereon during the performance of a shoe shining operation, is disclosed. A base panel is adapted to be secured to a vertical support surface, such as, for example, a wall or a door. A shoe support member is pivotably mounted adjacent the lower portion of the panel. A shoe retaining assembly is pivotally mounted adjacent the upper portion of the panel and comprises three relatively movable sections including a shoe tree structure. The sections are connected by unique pivot joints formed of integral parts of said sections, and are so arranged as to define an over-center type locking mechanism. In this manner, the apparatus is able to be collapsed for storage and quickly erected and locked for rigidly supporting the shoe during a shoe polishing operation.

Abstract: A ceramic electrode comprises an electrode body having at least one longitudinal hole, an elongated hollow connector member of a noble metal having a cross-sectional shape corresponding to that of the hole and being a close fit in the hole, and a plug member having a cross-sectional shape corresponding to that of the connector member, and being a close fit within the connector member, the plug being formed from the same material as the electrode or from a material having the same expansion characteristics as the electrode material.

Abstract: An appliance for supporting a fecal bag to the body of a colostomy or ileostomy patient to receive bodily discharge from the stoma comprises an ellipsoidal plate having a curved surface on a body engaging side and a recessed bag supporting ring on the opposite side. The outer rim of the plate along its major axis is arced to conform to body profile. A central aperture formed in the plate extends through the ring for positioning the stoma in the fecal bag. The plate is attached to the body using an appliance belt, and the curved body engaging surface pushes the skin inwardly at the abdominal opening to cause the stoma to be maintained in an extended position for drainage into the bag. The curved body engaging surface also increases the surface contact area between the plate and body and improves the plate-to-body seal. This prevents leakage of bowel acids under the plate, and minimizes slippage.

Abstract: A training device for practice running is disclosed having an elongated framework supporting a latticework made of resilient crosslines and a resilient intersecting center line positioned above the ground to define spaces in which the runner is to place his feet during use. The latticework is resilient to prevent tripping and injury to the runner and to retain the framework in a stable, assembled, condition without using fasteners. Support members of the framework are generally U-shaped and are connected transversely and longitudinally to support horizontal, opposed side members. The training device provides a portable runway formed by a framework of multiple detachable sections. The transverse, u-shaped support members are located only at the connection of the sections to thereby establish a running course which is free of obstacles below the lattice work and between each of the u-shaped cross members.

Abstract: A reformer for obtaining a reformed gas containing H.sub.2 and/or CO from an ordinary fuel exemplified by a petroleum fuel, having a reaction chamber in the form of a combustion chamber of a compression-ignition internal combustion engine, preferably with a swirl-producing auxiliary chamber, and a piston adapted to compress the fuel usually together with air at a compression ratio ranging from about 14 to about 20 in order to initiate and sustain a reforming reaction by the heat of adiabatic compression.

Abstract: Insulating spaces or material formed on or disposed in an inlet valve seat partially insulates same to reduce the rate of heat dissipation into the cylinder head. The hotter than normal valve and valve seat insert heat and partially evaporate the HC layer adhering thereto thereby reducing the thickness thereof to a minimum.

Abstract: An a.c. input signal is supplied to at least one input terminal to which at least one rectifier is connected for converting the a.c. input signal to a d.c. signal corresponding thereto. A plurality of transistors are connected between the at least one rectifier and a general purpose integrated circuit with a threshold value. Each of plural transistors is controlled in its on/off operation by the d.c. signal from the rectifier in order to control the output potential of the integrated circuit. A plurality of indicators are connected between a d.c. power source and outputs of the integrated circuit to be discretely and sequentially energized to indicate a peak level of the a.c. input signal.

Abstract: A cassette holder pivotally supported at its rear end and adapted to allow the insertion of cassettes at a set position within a cassette tape recorder. The cassette holder has a pivoted section capable of movement against the force of a spring so that the cassette holder can be rotated through a larger angle of inclination by removing it from a stopper which limits the angle of inclination, whereby a cassette can be directly placed within the tape recorder by inserting it below the cassette holder which has been rotated through the larger angle of inclination.

Abstract: A device for recirculating warm, moist air from a clothes dryer exhaust into a room is attached to the standard vent pipe of the dryer. The device comprises a length of corrugated, sheet aluminum tubing having a substantially right-angled bend. One end of the tubing is placed on the dryer vent pipe. The opposite end of the tubing beyond the bend extends parallel to the side of the dryer and slips into a double ply, nylon mesh, filter bag. The bag is releasably secured to the end of the tubing with a resilient band which seats within an annular recess formed at the end of the tubing. The tubing has an approximately elliptical profile beyond the right-angled bend so that the dryer can be located close to an upstanding wall for best floor space utilization. The nylon mesh prevents sticking by lint and other materials exhausted by the dryer for easy emptying.

Abstract: A feedback resistor is interposed between a reversing input terminal of an audio amplifier and at least one impedance circuit. The impedance circuit is connected to an output terminal of the amplifier to receive an amplified audio signal from the amplifier. The signal controlled in its frequency characteristic in the impedance circuit. A fraction of the signal is negatively fed back to the amplifier through a feedback resistor.

Abstract: The invention employs high volume air to form a cloud of coating material or material to be uniformly dispersed and conveys it to a plenum or common area of the receiving material which is coated. A mixer creates turbulence in the receiving material to turn up new receiving material to be coated. The invention has application to cement mixing, pigment and starch mixing, or even the mixing of atomized or vaporized fluid with on or more receiving materials to establish optimum surface connection for producing stronger cement or utilizing less materials for the same strength or optimizing the dispersion of the cloud introduced material with the receiving material.