Abstract: A rail road rail grinding truck adapted to grind the top surface of the rail comprises at least one grinding unit of which the position is adjustable by means of a cylinder and also of rail-engaging bearing shoes following the undulations of the rail surface. Each unit comprises an adjustable stop member responsive to a servo-action regulation device as a function of the grinding wheel wear and also of the rail undulations, so that the point of contact between the wheel and the rail cannot fall below the grinding base determined by the bearing shoes.

Abstract: A method and apparatus for burnishing the coated recording surface of magnetic disks. The method consists in contacting the coated surface of a rotary disk with a longitudinally stationary length of an abrasive burnishing tape while oscillating that tape laterally back and forth across the surface. The length of the tape has a first segment which is urged into contact with the coated surface and a much longer second segment which is urged into contact only by its own weight. Prior to burnishing each surface, the tape is advanced longitudinally so that a section of the tape serves as the first segment for only a single coated surface and so that a section of the tape to serve as the first segment has already served as the second segment in burnishing prior coated surfaces. The apparatus employed to burnish the coated surface of disks has a rotating platen onto which a disk is placed and an arm around one terminal end of which the tape passes.

Abstract: A skeletal framework structure employs a special junction for securing together the ends of the framework members, the ends of one pair of which members have longitudinal axes lying in a common plane while the axes of others of the members extend at angles to that plane. The framework members having axes lying in the same plane may be parts of straight tubular arch members in the framework, while the framework members extending at an angle to that plane may constitute spacer members, or purlins, extending perpendicular to the plane of the arch members, or may constitute diagonal bracing members extending at other angles to the plane of the arch members. In the junction, a first flat plate member extends parallel to the plane of the axes of the arch members and bears against and bridges the adjacent ends of said arch members, while a second similar plate member parallel to the first plate member bears against the opposite sides of the same arch members.

Abstract: A single piece of sheet material is shaped to substantially uniform cross-section to comprise a soffit section to be fixed under the projecting rafters of a building frame, an attachment flange depending from the rear of the soffit section, for attachment to the wall of the frame, a fascia section extending up from the front of the soffit section to cover the front ends of the rafters, and a fascia top piece extending rearwardly from the top of the fascia to lie over the front end portions of the rafters.

Abstract: A portable drilling rig for mounting on a flatbed truck or other carrier vehicle, includes a turntable rotatably mounted on the truck bed; a slide pivotally mounted on the top of the turntable for rotation around a horizontal axis; a hydraulic cylinder interconnecting the turntable and slide for raising and lowering one end of the slide so that the slide can be tilted from a transport position to an operating position beside the truck; a carriage slidably mounted on the slide, the position of the carrier on the slide being controlled by a winch, pulley and cable system; a derrick pivotally mounted on the carriage for rotation between the transport and operating positions, and a hydraulic cylinder interconnecting the carriage and the derrick for causing the derrick to move between the transport and operating positions.

Abstract: A windscreen mounting arrangement comprises a first part made of plastics materials in which is embedded a reinforcing metal carrier and defining a first channel, and a second part made of rubber and also defining a channel. The part has, running alongside its channel, a longitudinal slot whose mouth faces in the same direction as the channel of that part and whose walls and base are reinforced with an embedded metal carrier. The two parts are fitted together so that one side wall of the first part fits tightly into and is secured within the slot of the second part. This produces first and second channels running side-by-side and facing in opposite directions. One of these channels fits over and grips a flange surrounding the window opening so that the other channel runs alongside the window opening for receiving the window glass.

Abstract: In order to facilitate the handling or manipulation of products, especially printed products, typically newspapers and magazines or the like, the same are grouped together into a band worm-like, foldable composite formation. As a result, the printed products have imparted thereto, also in their dimensions, a defined identity which can be gainfully employed after a possible intermediate storage during each further processing thereof. At the same time there is facilitated the storage (stacking, palletizing and so forth) and the removal from a storage area as well as the transport thereof, especially since the access to the composite formation renders seizable, in a defined manner, each product which is engaged therefrom.

Abstract: A beverage-bottling method for non-carbonated beverages. An inert gas, other than carbon dioxide, such as nitrogen, is injected into a non-carbonated beverage prior to filling a container. Inert gas is permitted to escape from the beverage in the filled container before sealing the container. The amount of gas released is sufficient to strip dissolved oxygen from the beverage and then purge air from the headspace of the container. Sufficient gas is retained in the beverage to exert a superatmospheric pressure after the container is sealed. The reduction in oxygen content of the headspace is superior to that achieved with using a stream of nitrogen purging gas into the headspace, while dissolved oxygen is substantially reduced and internal container pressure is increased, the latter being a distinct advantage in containers made of flexible material such as sheet metal and plastic.

Abstract: Lift arms are mounted upon a cotton module builder. Cotton harvested from the field is placed into a basket which sets upon a convex guide upon a trailer. The trailer is pulled by a tractor to the module builder alongside the arms. The guide, together with the basket, is moved laterally toward the module builder. The arms are actuated to lift the basket from the guide to above the module builder. As the basket moves above the module builder a trip upon the module builder unlatches a door formed by one of the sides of the basket allowing the cotton to fall from the basket into the module builder. After the cotton has emptied into the module builder the basket is returned to the guide upon the trailer. The basket on the trailer is then moved to a harvester and refilled with harvested cotton.

Abstract: A device and method for limiting the amount of twist in a support filament as elongate transmission elements are being laid into sinusoidal grooves in the filament. The device has a groove follower in which a probe extends into a groove whereby the follower rotates around the filament, dependent upon the sinuous movement of the groove. A limiting means prevents rotational movement of the follower and probe beyond specified points of rotation and this is sufficient to restrain the filament from further twisting beyond these points.

Abstract: The present invention relates to a rotary-reactive internal combustion engine in which the reactive powers of the exhaust gas add to the driving torque of the present engine. The classification of this engine: The kind of the fuel is a liquid fuel. One cycle consists of the three working periods. The ignition of the fuel realizes inside the two combustion chambers by the high-tension ignition. One cycle is corresponding to a 360.degree. turning angle of the shaft of the rotor. The method of the formation of the mixture is the external mixing or is the pump fuel-air mixture with a very high pressure feed. The constructional distinctness is the rotary engine. The method of the formation of the power is the reactive power. The process of the scavenging is through forced scavenging. The present engine will be able to create the power and will work with a high speed rotation. This engine system allows it to use both synthetic fuel and common gasoline.

Abstract: A fluid control system for cleaning exhaust gases of an internal combustion engine by injecting additional air into the exhaust manifold of the downstream of the combustion chamber of the engine according to the engine operating conditions. This system includes a vacuum control valve which supplies vacuum on-off signals to a flow control valve device which meters injecting of additional air.

Abstract: This invention resides in a closed system, with permanently fixed end plates, which permits the pump-motor of the present invention to operate either as a combined pump-motor, or as a pump only, or solely as a motor. Rotators of this invention have parallel axes normal to the end plates which they intersect at fixed coordinates. That makes possible direct drive to or from a rotator shaft extension or the enclosing cylindrical rotator.In the device of this invention, the end-plates are non-rotary, but the cylindrical shell or housing always rotates. The plurality of rotators within the cylinder define a plurality of fluid pressure zones. Some of the rotators have a relatively smooth surface; the others have relatively gear-like surfaces. When the unit operates as a pump, a shaft extension of one of the rotators protrudes through one of the end plates and is coupled with an input power source such as the crank or pedals of a bicycle.

Abstract: A method of converting steam pressure from a boiler into a constant pressure hydraulic fluid working media and system for efficiently utilizing the hydraulically stored energy in a land vehicle or the like. A reciprocating steam piston actuates one or more hydraulic pistons in cylinders without going through a crankshaft or other rotating parts. A means of recuperating kinetic energy from a decelerating vehicle and storing it as pressurized working fluid is provided.

Abstract: A vapor cycle power system in which the low level heat source is furnished by water or air via the medium of a compression cycle heat pump, and subsequent higher temperature level heat energies are provided by direct combustion, solar energy, geothermal energy or waste heat, singularly or in combinations thereof, in either or both gaseous or liquid forms. In certain embodiments of the invention, the system has the capability to provide heating and cooling in addition to the function of producing useful shaft work.

Abstract: The invention provides a novel cold source for a Rankine cycle system which employs the use of cold seasonal temperatures to form an ice bed and which allows insulation of said ice bed from warm seasonal temperatures, the cold source comprising a container having an insulated side wall and an insulated bottom; a ventilated top wall mounted above said side wall, said top wall permitting a flow of external air to said container; means associated with said top wall for controlling the flow of external air to said reservoir; an insulated cover mounted on said top wall, a grate extending across said reservoir above said bottom defining a space for containment of a body of water; and means associated with said reservoir for spraying water into said reservoir. The invention also provides a novel turbine, condenser and evaporator assembly, and a magnetically-actuated fluid pump which may also be used for Rankine Cycle Systems.

Abstract: The requirements and treatment costs of water used in a fossil fuel fired power station are reduced by a process which employs multiple reverse osmosis stages. This process also employs station waste heat to concentrate solid waste material to facilitate disposal thereof.

Abstract: Closed fluid flow system and method for producing power from an extraneous heat source, in which a receiver is maintained with a volatile heat transfer fluid medium partly in the form of liquid and partly in the form of gas,to permit the pumping of liquid therefrom by a pump to an evaporator for evaporation to gas by means of the extraneous heat source, separating of any remaining liquid residue content from such gas, compressing of the separated gas to high compression gas, expanding of the high compression gas in a prime mover to produce power, and cooling and reliquifying of the separated liquid residue content for recycling to the pump,and furthermore to permit the removing of a refrigerating control portion of the liquid from the receiver for expanding and evaporating such control portion for cooling the contents of the receiver, removing of a compensating control portion of the gas from the receiver, and compressing of the expanded and evaporated liquid control portion and of the gas control portion to

Abstract: An electric power generating plant is provided with a Compressed Air Energy Storage (CAES) system which is directly coupled to the steam cycle of the generating plant. The CAES system is charged by the steam boiler during off peak hours, and drives a separate generator during peak load hours. The steam boiler load is thereby levelized throughout an operating day.

Abstract: The present invention provides a gasified ice product characterized by a high gas content, prolonged storage stability suitable for commercial distribution in its frozen state, and a vigorous, uniform release of gas when placed in aqueous liquid. The disclosed process maintains a high contact pressure between the gas and aqueous liquid and cools after hydrate formation under conditions of temperature and pressure which are controlled to prevent decomposition of hydrate or liquefaction of gas.

Abstract: Apparatus and method for preconditioning makeup air supplied to an air conditioning unit. An add-on preconditioning unit having a separate vapor compression refrigeration circuit is disclosed for heating or cooling makeup air supplied to an air conditioning system.

Abstract: A demand defrost system in which a high resistive epoxy resin hermetically seals a capacitive sensor plate and a noise immune phase detector detects a phase shift caused by the build up of frost.

Abstract: A refrigerated display case having a display section within a cabinet and a movable door covering a front access opening to such display section. A refrigeration air conduit extends along the top, bottom and rear walls of the cabinet. The air conduit has an outlet opening and an inlet opening at opposing ends thereof with the openings being in alignment so that air leaving the outlet opening will be directed towards and received by the inlet opening thereby forming an air curtain across the front opening of the cabinet along the path inside the door. During a refrigeration cycle of operation of the display case, refrigerated air is circulated through the air conduit and a refrigeration mechanism arranged within the conduit so as to establish a refrigerated air band and a refrigerated air curtain across the front opening in the cabinet. During a defrost cycle of operation, the refrigeration mechanism is turned off and the door covering the front access opening is slightly opened.

Abstract: A heat-actuated space conditioning system comprising a sub-atmospheric natural-gas-fired Brayton cycle engine driving a Rankine cycle heat pump. A centrifugal Freon compressor is driven directly from the Brayton engine rotating group through a permanent magnet coupling. The system utilizes an in-line combustor which is operated to burn natural gas at atmospheric pressure by virtue of the associated sub-atmospheric Brayton cycle engine. Ambient stoichiometric air is drawn through an associated recuperator where it is preheated before being introduced into the combustor. Compressor discharge gas is also cycled through the recuperator and used as diluent to provide added flow and the desired turbine inlet temperature. Waste heat is used to power a boiler for the Freon in the Rankine cycle side, and this converted energy is used to drive a second turbine providing added power to the Freon compressor. A boiler feed pump is included which also serves as a starting mechanism for the rotating assembly.

Abstract: An air conditioning system furnishing temperature conditioned air to a plurality of zones each of which has its own zone damper controlled by its own space thermostat. The system has an air discharge temperature sensor downstream of the temperature conditioning heat exchanger which is connected to a microprocessor controller for controlling a plurality of stages of temperature conditioning apparatus such as heating or cooling apparatus and a damper motor control for controlling the entry of outdoor air into the system.

Abstract: A portable and self-contained ice bucket combination having a compartmentalized portion for chilling condiments and the like. The ice bucket includes an insulated vessel or base portion for defining a chamber within which cooling a media, such as ice may be stored. The vessel is open ended at the top and includes a complementary support structure for placement and support of a compartmentalized condiment tray thereon in communication with the cooling media while serving as a cover or closure for the vessel. The compartmentalized tray defines a plurality of compartments within which condiments and the like may be placed for chilling and serving. In addition, the tray includes a second compartment serving the dual purposes of containing similar articles and functioning as a handle for removing the tray from the top of the vessel. An annular cover plate is included for placement over the condiment tray for storage or transporting from one location to another.

Abstract: An air conditioning system of the air cycle heat pump type for selectively heating and cooling a residence or similar space environment. In one embodiment, a combustor and associated Brayton cycle turbine provide the primary drive to a compressor constituting the heat pump. In a second embodiment, the Brayton turbine is replaced by an electric motor coupled to drive the compressor shaft. An auxiliary turbine is also coupled to the drive shaft to provide auxiliary drive derived from the operation of a portion of the system at sub-atmospheric pressure. In this portion, during the cooling mode, water is evaporated into the system to further assist in cooling by removing the latent heat of vaporization.

Abstract: An improved gear type coupling wherein the sleeve thereof is a torsional shear element to provide torsional overload protection to the coupling and its connected equipment. The shear section of the shear element is an integral part thereof and all sections of the shear element conduct an equal share of the transmitted torque.

Abstract: A flexible shaft coupling is of the kind comprising two annular assemblies which transmit torque between two rigid coupling parts which are arranged concentrically one within the other. The annular assemblies are concentric and have a space between them, and groups of radially directed filament loops or turns, which are embedded in an elastomeric mass, extend around members of the assemblies to interconnect the assemblies. Parts of the loops or turns between the members are supported on elastic cushions, which are formed by parts of the elastomeric masses, and are displaceable inwards into gaps between the members and within the elastomeric masses. The members of one assembly are attached to one coupling part and the members of the other assembly are attached to the other coupling parts.

Abstract: A torsional vibration damper assembly to provide extended travel for the dampening effect which is achieved by the use of two concentric series of damper springs interconnected through a common housing or intermediate member. A driving plate has two or more drive tangs secured thereon, which tangs extend inwardly into the path of the outer circle of damping springs. One or more floating divider rings are journalled in the assembly and have ears projecting into the path of the springs as do outer drive straps of the intermediate member. Floating wedges or skates are located between the springs of the inner circle along with inner drive straps of the intermediate member and hub arms in the path of the inner springs; the hub being driven through the circles of springs to drive a transmission input shaft.

Abstract: An improved cutting system for knitted fabrics, wherein a cutting element is mounted on a knitting machine for movement in unison with the needle and positioned to cut the knitted fabric to a predetermined dimension at least one cycle after the knitting cycle.

Abstract: A double cylinder circular knitting machine for forming articles of terry fabric, comprises, in one of the cylinders (3), a ring of arcuate terry sinkers (24) each controlled by a butt (24A) so that it carries out a reciprocating angular sliding movement in an arcuate seat (22) in the end of the cylinder (3), and a loop withdrawal ring (26) for retaining the loop during the withdrawal of the end of the sinker (24) from the loop. The working end of the sinker (24) is rotated before its forward movement, so as to move it away from the loop withdrawal ring (26), and enables it to pass over the loop just formed on the previous course, the sinker (24) then being rotated in the reverse direction for forming the next loop. This arrangement permits loops to be formed in each course of the fabric.

Abstract: A chain lock is disclosed which has an outer sleeve fitting over an inner cylindrical case having a recess for the insertion of a link of a chain. When the case is rotated within the sleeve, a locking member moves within the recess to prevent release of the chain link from the recess. A locking device fits within a bore of the case and extends through a hole in the sleeve to prevent rotation of the case within the sleeve. When the locking device is removed from the bore in the case, the case is free to rotate to allow the locking member to clear the recess and to permit the chain link to be removed. The ends of the chain and the locking mechanism are completely contained within the case of the lock preventing tampering with the locking mechanism or access to the chain. There are no internal latches or levers to jam and the chain lock generally conforms to the shape of the chain.

Abstract: A lock having a key-operated rotary plug supported within a shell. The rotary plug has an eccentric tenon which projects axially from the inner end thereof, which tenon is engaged within a transverse slot formed in the opposed face of the dead bolt to cause reciprocal slidable displacement thereof in a direction perpendicular to the rotational axis of the lock. The rotary plug also has a second eccentric tenon projecting axially from the inner end thereof, which second tenon is angularly spaced a substantial distance from the first-mentioned tenon. The bolt has a second slot which is closely adjacent but spaced from the first-mentioned slot. During rotation of the plug through a selected angle, such as 180.degree., one of the tenons engages one of the slots during only a portion of the selected angle to effect linear displacement of the dead bolt through a portion of its stroke.

Abstract: A metal sheet is deformed to produce a blank which has one side which is smooth and another side which is ornamented with a pattern of raised and/or depressed areas. The blank is deformed to produce a cooking vessel which has the ornamented side located on its exterior surface.

Abstract: A method of tensioning metallic strips on a slitting line is combined with the steps of uncoiling a metallic web having a non-uniform cross sectional thickness from an uncoiler, slitting the web into a plurality of strips having varying thicknesses, and recoiling the strips into individual strip coils on a recoiler, the tensioning method being the additional step of deforming the thinner portions of the web intermediate the uncoiling and recoiling steps so that a raised pattern is imparted to the thinner portions thereby increasing the effective cross sectional thicknesses of the thinner strips to that of the thicker strips so that the strip coils formed from the strips are of similar diameter and the strips can be recoiled at the same rate, thus preventing the formation of slack strips.

Abstract: A metal bar undergoing hot rolling is sheared by a pair of shear knives which form a rounded wedge shape at a downstream end of the bar to minimize split ends and cobbles during the rolling operation. The two knives have respective, mating male and female sections which have peripheral cutting edges defining the rounded wedge shape. The shape and angular parameters of the peripheral cutting edges on the two knives provide a progressive, scissors-like, shearing action along the cutting edges from their upstream ends to their downstream tips.

Abstract: The stand-to-stand transmission ratios between the working sizing passes at the entry end of a rolling block for rolling bars, rods or wire are fixed but are different from one another. This enables an entire range of finished workpiece cross sections to be obtained from a given first pass workpiece entry cross-sectional area, merely by omitting one or more of the working stands and shifting other working stands from one location to another and by changing only the stands of the finishing sizing passes at the delivery end of the block.

Abstract: The invention relates to a method and a device for bending sheet-metal sections. It is previously known to bend sectional sheets, but the known art involves certain problems to bring about a non-angular bend with a small radius and without damaging the sheet. According to the invention it is proposed for eliminating said problems, that in connection with the impressing of the sheet portions located closest to the bending axis the lateral portions (1c; 32c; 50c) of the sheet are subjected to an outwardly directed force (17; 39; 56) or prestressing in a plane through the impressions (34; 59), in order to form an outward bulging (40; 58) in the lateral portions (1c; 32c; 50c) and on the same side of the sheet as the impressions (34, 59).

Abstract: Retrofit apparatus for a press brake to make it capable of programmed operation, has an inclined support mounted on the lower bed of the press brake upon which is slided a plurality of wedges beneath a transversely-restrained, vertically-mobile die holder. The wedges are coupled at their aft sides to a horizontal beam driven transversely and reciprocatingly by a linear actuator at its center to provide vertical motion to the die holder; the deflection of the center-driven beam provides a crown to the die holder corresponding to the inherent upward bow of the upper ram.The method of use comprises the steps of positioning the workpiece horizontally, and vertically lowering an upper ram from above the workpiece until a die mounted on its lower end contacts the upper side of the workpiece, clamping it in place. Then, a lower die holder cammed upwardly relative to the press bed, to make the desired bend in the workpiece.

Abstract: A tool for setting fasteners in which the fasteners comprise a pin member each having a plurality of grooves adapted to be gripped by a plurality of jaws in a nose assembly of the tool with the jaws being connected to a resilient member in a manner maintaining the jaws in a desired axial and radial alignment with each other and with the tool and selected fasteners defining a fastening system.

Abstract: A hand riveter consisting essentially of a frame main body, a lever, a jaw case support member, a jaw case accommodating a jaw assembly, and a jaw case housing. The jaw assembly attached to the head portion of the riveter is easily shiftable to a forward position or a downward position as desired through an angle of displacement of about 90 degrees.

Abstract: A heading reference system mounted in a vehicle, e.g. an aircraft or a ta includes a magnetic compass and a gyroscope. The magnetic compass is subject to deviation in the magnetic field, hence the system must be calibrated. If the vehicle is oriented in a starting direction, and the output of the magnetic compass compared to the output of the gyroscope, an error signal is developed. This error signal is filtered to reduce noise, then stored. The vehicle is then re-oriented and the procedure repeated until sufficient information is available to calibrate the system. A microprocessor may be used for the computations and filtering of noise.

Abstract: Apparatus for calibrating a flow meter under test is disclosed as including a chamber having an opening to be coupled by a conduit to the fluid meter under test, a piston to be driven by a motor in a first direction and in a second direction. A first valve is disposed within the conduit and inserted between the chamber opening and the fluid meter under test, while a second valve is associated by the conduit to the opening to permit exhaust of the fluid from the chamber. A control circuit including a microprocessor operates in a first mode to energize the motor to drive the piston in the first direction to draw fluid from the meter into the chamber while actuating the first valve to be opened and maintaining the second valve in its closed position.

Abstract: A pair of electrodes are spaced apart on an electrically-insulating support surface. Disposed on the surface in a position bridging the electrodes is a sensor that exhibits a change in conductivity in response to exposure of the material to a wide variety of certain flammable and toxic gases. Overlying the sensor is a molecular sieve passivation layer composed of a porous solid material that has a pore size no larger than the molecular size of the gas to be sensed. The molecular sieve passivation layer can be incorporated onto various solid state and catalytic-type gas sensors, including metal oxide based solid-state sensors such as, for example, those of a zinc oxide base. With or without the sieve, the most salient form of zinc oxide based sensor is zinc oxide doped with gallium oxide. It is expedient to use such improved sensors as a discrete device or in a hybrid array for environmental ambient qualification as incorporated into a portable instrument.

Abstract: A blowout preventor test system utilizes a pipe nipple being threaded, for example, at both ends, and having a central bore through which fluid can be conveyed. At the central portion of the bore is a reduced orifice which constricts flow through the bore. Trapped through the walls of the nipple, on either side of the orifice, are instrumentation taps for attaching a differential pressure recording device having dual pins and a recorder chart. To ensure during testing of the BOP stack that each and every ram on a BOP or blowout preventor stack is properly tested, the orifice within the test nipple provides a restriction in flow which will be apparent from an inspection of the recorder chart. Different readings of pressure drop are produced by the test pin if in fact on each ram, the BOP stack is pressurized and exhausted. Thus, there is provided a means for the inspector to know whether or not each and every ram is inspected.

Abstract: In a rotary viscometer comprising a variable speed drive motor including a speed indicator, such as a tachogenerator or a similar device, and a measuring shaft driven by an output shaft of a rotor of said motor and carrying a measuring member immersible in a medium of which the viscosity is to be measured, the motor stator is rotatably displaceable against the action of a spring, the displacement being a measure of the viscosity. The driving connection between said motor and measuring shaft comprises at least one pair of exchangeable gears or toothed belts and said spring is exchangeable for one having a different spring characteristic.

Abstract: A process for monitoring solvent content in a ceramic green sheet wherein the green sheet is partially supported so that a portion of the sheet is free to sag under the influence of gravity, with or without any additional force to enhance or minimize the sag, measuring the rate of sag of the portion of the sheet free to sag, and comparing the rate of sag to a correlation standard of rate of sag versus solvent content of the green sheet under test to determine acceptability.

Abstract: A method of continuously logging a borehole in the course of drilling with the use of a drilling mud. According to the invention, the drilling mud fed into the borehole is subjected to unipolar electric treatment, with simultaneous measurement of the oxidation-reduction potential of the drilling mud. This value is maintained substantially constant at a given magnitude. The value of the oxidation-reduction potential of the drilling mud returning from the borehole is continuously measured and compared with the given value of the oxidation-reduction potential of the drilling mud fed into the borehole. Using the difference between the two values, the mineralogic composition of the rock adjacent to the bottom of the hole is determined for a given moment, by comparing this difference with the known in advance normal oxidation-reduction potentials of minerals.

Abstract: A high temperature outdoor weathering chamber approximating the passenger compartment of an automobile body for testing the effect of natural sunlight on material fibers and colors. The chamber comprises a box having insulated side and end walls and a hinged closure of standard automobile glass. The hinged glass closure provides access through the top of the box to a sample rack that is positioned below the glass closure to support samples for exposure to solar radiation.An aluminum heat shield is positioned below the sample rack. The chamber is constructed and arranged so that air enters an air intake at the bottom of the box, flows through thermostatically controlled heater strips, then beneath the heat shield and out an exhaust outlet at the opposite end of the box above the level of the heat shield. Airflow is solely by convection.