Abstract: A mine anchor line cutter is slidable lengthwise of a cutter body provided with a bore behind the cutter for receiving an explosive charge that is detonated by the mine anchor line that is to be cut, whereby to drive the cutter forward. The cutter body is supported by a stabilizing fin, the front portion of which is overlapped by a retaining member shaped to hook over a sweep line. Extending through the retaining member and fin and into the cutter body is a shear screw that connects them together but that is weak enough to be sheared off by movement of the cutter body rearwardly, due to recoil when the tool is fired, whereby all of the tool will separate from the sweep line supporting it.

Abstract: A reline tower is supported by a wheeled car for movement along rails while the tower extends in a vertically-spaced relation below the bottom opening in Q-BOP type of metallurgical furnace which is supported for pivotal movement about a horizontal axis. When the tower is supported on the car for a tilting type of pivotal movement, a control system synchronizes tilting movement of the tower in relation to both displacement by the car along the rails and pivotal movement of the metallurgical furnace whereby the tower is moved into a generally upright position while the upper end of the towerextends within the metallurgical furnace. The entire tower is either pivotally attached to the wheeled car or the tower is divided into a lower straight section carried by the car to pivotally support an upper tower section.

Abstract: A liquid crystal welding lens assembly for use as the eyepiece of a welding helmet in which the light transmission of the lens assembly is no greater than 0.01% during the existence of a welding arc. This is achieved with the use of at least two liquid crystal light shutters and three polarizers alternately arranged in tandem.

Abstract: A protective welding lens assembly for use as the eyepiece of a welding helmet. The lens assembly utilizes a liquid crystal light shutter together with an electrical circuit adapted to change the light shutter from a uniform light-transmitting condition to a uniform, approximately opaque condition of very small light transmission solely in response to light energy emitted by an electric welding arc without the use of any connecting wires. Two light sensing devices are employed, one of which responds to visible light only and the other of which responds to infrared wave energy only. In order to change the light shutter from a light-transmitting to an opaque condition, both the visible and infrared wave energies from the arc must be sensed. This prevents a condition wherein the light shutter will remain opaque, even after the welding arc is extinguished, due to emission of infrared wave energy from a still-hot weld bead.

Abstract: Special-purpose transition and fittings for optical fibers or bundles of optical fibers are produced by selecting a hollow shell having an internal surface defining a desired barrier configuration. The shell is filled with a liquid barrier material under an applied vacuum and then partially drained to provide a liquid cladding of the barrier material which is then cured. A core of fiber optic material is cast against the cured cladding of the barrier material under an applied vacuum after which optical entrance and exit surfaces are formed on the cast core for joining with an optical fiber.

Abstract: A method and apparatus are provided for the inspection of nuclear fuel rods to detect defects or failures in such rods. Assemblies of fuel rods are immersed in water and means are provided for causing a change in the relative pressures in the water and within the fuel rod such that fluid is expelled from the rod through any defects that may exist. Means are also provided for thereafter vibrating the rods to cause additional internal fluid or other material that may be trapped in the rod to be expelled. Sensors are provided for detecting the emission of bubbles of fluid or other material from the rod and for locating the position of the defective rod in the assembly.

Abstract: A carrier frame supports a renewable filter cartridge for rotation within a filter housing that includes an annular side wall with an air inlet and a bottom wall having an air discharge opening communicating with a carburetor for an internal combustion engine. A pedestal supports the carrier frame via an anti-friction bearing within the filter housing. The pedestal has diammetrically-opposed annular wall segments that close the airflow space between two adjacent arcuately-shaped impellers that join together upper and bottom cover plates forming part of the carrier frame. The upper cover plate has an outer diameter that corresponds to the annular opening in the renewable filter cartridge while the bottom cover plate has an outer diameter that is approximately equal to the outside diameter of the renewable filter cartridge for support thereof. The bottom cover plate additionally supports vertically-extending fins located at the outer peripheral surface of the filter cartridge.

Abstract: Described are electromechanical transducers, particularly electroacoustic transducers for use in microphones and the like, which utilize a change in the direction of alignment of liquid crystal molecules to vary the capacitance of a capacitor formed by a layer of liquid crystal material disposed between conductive films or plates.

Abstract: The displacement of a cutting tool carried by a pivot arm for universal movement on a tunneling machine is controlled to produce a tunnel having a desired profile by producing position signals representing a measured set of perpendicularly-related pivot angles corresponding to the relative position of the cutting tool with respect to the central axis of the tunneling machine when located at a set-point position at the heading face of the tunnel. Second position signals are generated after anchoring the tunneling machine and/or after a plunge cut by the cutting tool into the heading face. A computer coupled to a store or a scanner for a template shaped to correspond to the desired tunnel profile provides signals to represent set-point values of a desired tunnel profile. The first and second signals are generated when a laser detector is moved by the pivot arm into an impinging position by a laser beam which is projected along in a direction parallel with the desired tunnel heading toward the heading face.

Abstract: 1. A thermal cell electrode composed of a thin metal sheet in the form of two laterally spaced members integrally connected at adjacent edges by a strip, a first of said members being in the shape of a pair of isosceles triangles joined through their bases and in which the apex of the equal sides of one of said triangles is truncated, and the other of said members defining a truncated triangle smaller than the truncated portion of said first member.

Abstract: A method for bringing a quenching medium into contact with both the inner and outer wall surfaces of metallic tubing, characterized in that a quenching liquid is fed into the interior of the tubing and pressurized, followed by quenching of the outer wall surface, preferably by immersion in a tank containing a quenching liquid. Pressurization of the quenching liquid fed into the interior of the tubing insures uniform wall contact of the liquid around the inner wall surface and along the entire length of the tubing. This brings about uniform hardness characteristics throughout the thickness of the tube walls and along its entire length and eliminates or reduces quench-crack problems inherent in prior art quenching systems wherein the quenching medium within the tubing is not pressurized.

Abstract: An anti-theft and adjustable mounting assembly to attach a CB radio transceiver onto the instrument cowl of a vehicle. Attached to the opposite sides of the casing of the CB radio device by threaded fasteners are U-shaped members which extend between the legs of complementally-shaped upstanding side members forming part of a U-shaped frame. Threaded shafts in stationary blocks are used to adjustably control the position of U-shaped spacer members and, hence, the CB radio transceiver relative to the upstanding side members. An open-ended housing receives the U-shaped frame while supporting the casing of a CB radio transceiver. An L-shaped cover spacer extends downwardly within the housing from the top wall to close any gap between the CB radio transceiver and the housing. A lock box on the housing receives a lug on the frame for interlocking engagement by a key-operated lock.

Abstract: A carbon monoxide removing catalytic material is disposed in one end of a first hollow column having open ends while porous inactive material is disposed in one end of a similar second column to offer substantially the same resistance to air flow as the catalytic material. There is a bed of regenerable air-drying substance in each column between the other material therein and the opposite end of the column. The volume and resistance to air flow of the two beds is substantially the same. Valve means connect an air stream with said opposite end of the first column and simultaneously connect said end of the second column with the atmosphere. Conduit means connect the other ends of the columns with each other, with an outlet port between the columns connected with the inlet of a pressure regulator.

Abstract: An electric arc furnace control system is provided for positioning the furnace electrodes in accordance with the resistance of the arc. This is accomplished by balancing the arc current signal against a voltage signal multiplied by a signal representing the arc circuit power factor to provide an error signal. An analog command signal is then derived from the error signal to control the direction and speed of the electrode hoist drive motor.

Abstract: A boiler has an outer wall of weldable material and an inner chamber including a high temperature heat exchanger which is connected by pipes passing through openings in the outer boiler wall for the supply and discharge of a heat exchange medium. Each pipe for the heat exchange medium is spaced from and passes through a sleeve-like jacket that is welded to the outer boiler wall and projects outwardly therefrom. A cooling gas is fed into the sleeve-like jacket to pass along an annular space between the jacket and the pipe. The cooling gas flows into an annular chamber between the outer boiler wall and the inner chamber. According to a second embodiment, concentric sleeves are provided in the annular space between the jacket and pipe to pass the cooling gas to and fro within this space.

Abstract: Variable stroke pumping apparatus suitable for pumping chemicals in a pulseless manner irrespective of the stroke. The apparatus comprises a plurality of pumps connected in flow paths extending between a fluid inlet and outlet and a central housing containing a cam and cam follower devices mounted on a carrier which is pivotable to alter the stroke of the pumps while maintaining substantially constant aggregate pumping of the pumps. Pump reciprocating members for each pump, e.g. rams extend outwardly of the housing and are reciprocated by the cam follower devices.

Abstract: Liquids and semiliquids, such as thixotropic gels, oil and greases, are delivered to a discharge means according to a method and through the use of an apparatus powered by hydraulic fluid under pressure which is controlled by a valve for passage to a hydraulic motor that is, in turn, coupled to a pump used to withdraw and pressurize the material for delivery by a conduit line to the discharge means having a discharge orifice that is either nonclosable or synchronously opened. The material is discharged by controlled pressurization which is initiated and terminated by controlling the flow of hydraulic fluid to the hydraulic motor in response to actuation of a trigger or switch on the discharge means. A discharge gun and a lubricator collar are two preferred forms of the discharge means.

Abstract: In an ore cleaning process the underflow from an ore classifying cyclone is delivered to a heavy medium cyclone where the ore is cleaned. The underflow leaving the classifying cyclone is continually measured for specific gravity and flow rate while the specific gravity of heavy medium that can be applied to the underflow is continually measured. The amount of this heavy medium and the amount of water required to be added to the underflow are continually controlled as functions of the specific gravity and flow rate thus measured, whereby a substantially constant specific gravity and flow rate of the underflow is maintained as it enters the heavy medium cyclone. Magnetic separating means receive the overflow from the heavy medium cyclone and separate the heavy medium from the ore, while other magnetic separating means receive the underflow from the same cyclone and separate the heavy medium from the rejects. The heavy medium is used again.

Abstract: 1. The method of making a thermal battery, comprising continuously moving a nickel strip lengthwise, coating substantially half of one surface of the travelling strip with a mixture of V.sub.2 O.sub.5 and glaze-forming material and a liquid carrier to form a band along the strip, heating said band to melt it to form a glaze, cooling the glazed strip, coating the remainder of said surface of the nickel strip with a metal from the group consisting of Mg and Ca to form a band thereof along the strip beside the glaze, cutting battery plates from the glazed half of the strip and from the bimetal half of the strip, and placing between a glazed plate and a bimetal plate a wafer having a V.sub.2 O.sub.5 layer and an electrolyte layer, with the V.sub.2 O.sub.5 layer engaging said glaze and with the coated side of the bimetal plate engaging the electrolyte layer.4. A thermal battery comprising a wafer having a V.sub.2 O.sub.5 layer and an electrolyte layer, a nickel cathode terminal plate, a glaze containing V.sub.2 O.

Abstract: The winning tool carried for universal movement by the frame of a tunneling machine is controlled by a system and method to limit tool movement in a manner to form a tunnel with a desired cross section. Positioning of the winning tool is determined in relation to a laser beam projecting along the length of the tunnel while the range of universal movement by the winning tool is limited by a set of tool coordinate values determined by scanning a pattern, template or the like defining an outline that is geometrically similar to the desired cross section of the tunnel. The tunneling machine carries a receiver for the laser beam that irradiates front and rear detectors each including an array of photodetectors. Servomotors respond to an output signal from the front detector to align the receiver by a translating motion so that the laser beam passes through a single passageway in the front detector to irradiate the rear detector.