Abstract: An improved oil well pumping unit has an arc latch which is remotely actuable so that a workman is not required to climb onto, or be in the immediate vicinity of the arc, in order to move the arc to an inoperative position spaced from the centerline of the well.

Abstract: An improvement is provided in continuous caster molds for quick disconnect of a mold wall from its spacing adjustment mechanism. A plate attached to the adjustment mechanism is aligned generally parallel to the mold wall. A pair of connections are provided adjacent upper and lower ends of the mold walls for connecting the wall to the plate. The lower connection is adapted to make the wall and plate readily separable at the lower connection. The improvement is provided in an upper connection which includes a pair of flange portions of the wall and plate having at least one pair of mateably aligned holes therein. A pin is adapted to fit in the holes of the flange portions and is threadedly engaged in the hole in one of said flange portions. Upon removal of the pin, the wall and adjustment mechanism are made readily separable and one can be lifted free of the other.

Abstract: A load signal representing the load between a mold and an oscillating mechanism is separated into its static offset and dynamic components. The static offset signal is compared with a free-running static offset to obtain a substantially DC signal representing the DC component of mold friction. A DC voltage is generated corresponding to the RMS value of the dynamic load signal component, and a reference voltage corresponding to the RMS value of the dynamic signal component of a free-running load signal is subtracted in order to obtain a substantially DC signal representing the dynamic component of mold friction.

Abstract: A construction for the refractory lining member of a coke oven door is provided. The coke oven door lining includes a generally "U"-shaped frame with a castable refractory element formed therein. The frame is provided with a base portion and first and second legs which extend from the base. A series of diagonal cross-members are provided to be affixed at one end to the ends of the legs and at the other end to the central region of the base portion. The refractory member is formed from a castable refractory material and is designed to extend beyond the ends of the legs of the frame. In an alternative embodiment of the invention, the refractory member consists of a two-layer system to provide greater insulation.

Abstract: In a continuous casting apparatus, the level of liquid in the mold is monitored and compared to a desired reference level. A microcomputer examines the resulting error signal and determines the amount of movement of the valve which would be appropriate to correct the detected error. A control pulse is then generated having a duration corresponding to the desired movement distance, and the valve is adjusted accordingly.

Abstract: Apparatus for positioning an edge protector to the edge of a package to be looped with strapping is provided. The apparatus includes a guide rail extending generally normal to the exposed package edge and an edge protector positioning apparatus mounted on the rail. The edge protector positioning apparatus has an edge protector application station adjacent the edge to be protected and is provided with an angularly oriented magazine which stores a stack of nested edge protectors each with its concave face foremost. Edge protectors are delivered to the application station from the magazine by means of a fluid motor operated pushing means which acts normal to the magazine to individually remove each edge protector therefrom. From the pushing means depend extended fingers having an edge protector support surface.

Abstract: Apparatus for effecting the knotting of wire strapping applied to a package is provided. The knotting function is motivated by means of a hydraulic cylinder which displaces a rack gear which, in turn, drives a pinion gear to which a splined shaft is affixed. The shaft runs through the knotter unit housing which includes a twister pinion for knotting the wire, wire gripping means, cutting means, wire ejecting means and a wire cover means. In the operation of the apparatus disclosed, the end portion of the wire is fed by a remote feeder through a guide area, engaged by a gripping means and the wire is tensioned by the feeder. The hydraulic cylinder causes the shaft to rotate in a first direction which turns a first drive hub that engages a twister gear having a uni-directional pawl, which twister gear turns a twister pinion gear thereby twisting the wire.

Abstract: Apparatus for controlling the jerk or shock loading of the wire rope used to apply tension to move a galvanizing or pickle line's horizontal looper car. The apparatus includes a vertical spindle affixed to the frame of the looper car. A drum having a radially extending arm is provided to be rotatable about the spindle. The arm is provided with an intermediate region to anchor the wire rope and a terminal region to cooperate with a resilient shock absorbing means which may comprise a polyurethane pad. Such shock absorbing means includes a bracket affixed to the looper car frame. A spring-biased bolt connects the arm to the bracket while a resilient pad is provided intermediate the arm and the bracket.

Abstract: A method is provided for measuring and controlling the level of an elevated temperature liquid in a container. The method includes converting electrical voltage signals from temperature sensing means spaced along a wall of the container to digital form. The converted signals are periodically scanned in elevation sequence. From the scanned signals the location is determined of the uppermost sensing means having a signal value of sufficient magnitude to lie below the liquid level. A fraction, F, of the spacing between that sensing means and the next above sensing means is calculated at which the measured liquid level lies. The fraction determined is a function of the converted signal value, Sn-1, a converted signal value, Se, at an estimated location of the liquid level and, So, a converted signal value sufficient to cause the fraction, F, to be at or near zero in value immediately prior to imminent changes in the location of the uppermost sensing means determined to lie below the liquid level.

Abstract: A method is provided for measuring and controlling the level of an elevated temperature liquid in a container. The electrical voltage signal outputs of a plurality of temperature sensing devices at spaced elevations on the container are converted to digital form. The converted signals are periodically scanned in elevation sequence. A determination is made from the scanned signals of the location of the uppermost sensing means having a converted signal value of sufficient magnitude to indicate a temperature in the wall below the level of liquid in the container. Then a fraction, F, of the spacing between the sensing means, n, and the next above sensing means, n-1, is calculated as a function of the converted signal value, Sn-1. The measured level in the container is calculated as a function of, n, and, F, with respect to their location on the container. Finally, the rate of addition and withdrawal of liquid to and from the container is controlled based on the measured liquid level in the container.

Abstract: An insert is provided for a continuous caster mold which permits casting of plural strands in the mold. The insert has opposed wall faces, the spacing of which is independently adjustable at their upper and lower ends. The spacing of the upper and lower ends is made adjustable by separately actuable wedge assemblies, each of which includes a wedge and ramps having mateable angularly aligned surfaces. At least one surface in each pair of adjoining wedge and ramp surfaces has a convex curvature to permit adjustment of the angular alignment of the wall faces as required at the various spacing distances thereof. The wedges provide greater rigidity than screw-type adjustment, preventing undesirable variations in taper during casting. The invention includes a method of installing the insert in the mold and adjusting the spacing and angular alignment of the opposed wall faces of the insert.

Abstract: An apparatus is provided for performing multiple operations on a conventional open-die forge press, and includes a rotatable top punch assembly and stationary bottom die assembly. The top punch assembly includes a mounting fixture secured to the press crosshead, a holder plate rotatably mounted on the fixture, a plurality of punches extending downwardly from the holder plate, and motor means for indexing the punches sequentially into forging position over the bottom die assembly. A method is also provided for making valve pots, including upsetting a heated metal block in a split die and punching a hole through the block, the improvement in which during the upsetting step a vertically reciprocable member is extended so as to close a bottom opening in the split die, in order that the split die will function as a closed die, and during the punching step the reciprocable member is retracted so as to allow a punch-core to fall through said opening.

Abstract: The invention is of a valve member having a replaceable deformable insert installed in a groove of the member and a deformable backup member secured to the valve member, preferably by bonding, and abutting so as to abut at least a major portion of a transverse surface of the insert opposite a tapered seating surface thereof. The insert may be of harder more wear resistant material than the backup member extending service life and permitting easier repair or replacement of the insert.

Abstract: A composition is provided for use as an anti-scaling coating or to produce legible markings on metal products. The composition includes solids of from about 30 to 50 parts by weight of an opacifying pigment, from about 43 to 58 parts by weight of a water soluble alkali metal silicate binder, at least 50 percent of the alkali metal silicate being sodium silicate, the alkali metal silicate having a ratio of silicate to alkali metal oxide of from about 2.60 to 3.25, sufficient cross-linking binder to provide from about 1.5 to 5.0 parts B.sub.2 O.sub.3, the ratio of total pigment to total binder being within the range of 0.50 to 1.0, and sufficient water to give the composition a viscosity of about 800 to 5000 centipoise. The composition adheres when applied to metal products which are at temperatures of at least 250.degree. F. or which are subsequently heated to such temperatures so as to bake the coating.

Abstract: The present invention involves improvements in reciprocable pumps. In one aspect, applicable to single action pumps, a quick release mounting means is provided for attaching a fluid end piece to a power frame. The frame has a tapered opening for receiving a barrel portion of the fluid end therein. A wedge device of mateable taper with the opening connects the barrel securely to the frame. The wedge extends around the transverse outer periphery of the barrel portion. Another aspect of the invention involves providing axially rotatable intake or exhaust manifolds. In a multiplex pump, the manifold may be rotatable as a unit, or the section for each conduit may be separately rotatable. This feature permits easier handling when making repairs, especially on larger pumps. Finally, in pumps having non-vertical suction or discharge passages, the valve counterbores are tilted toward a vertical direction, but not more than an angle at which straight-line machining of the suction or discharge passage is still possible.

Abstract: A method is provided for making single crank throws for built-up crankshafts. The method includes heating an elongated workpiece having a saddle-shaped central area on one surface thereof and forming the workpiece into V-shape by pushing it with a punch into a first-forming die having legs angled between 35 and 65 degrees. The punch is V-shape with opposed surfaces inclined at substantially the same angle as the first-forming die. The workpiece is then reheated and pushed with a punch into a second-forming die having inwardly converging surfaces at an outer portion of the cavity and parallel sidewalls joining the inner end of the outer die surfaces. The apparatus includes a bottom die having a long generally rectangular cavity and top die punch rotatably mounted about a vertical axis on the underside of the press crosshead and a motor drive for rotating the top die punch to alternate positions for forging opposite halves of the workpiece in the lengthwise direction.

Abstract: A mine roof-truss-bolt system and a novel clip for use in such systems are provided. The system includes opposed anchor members installed in the roof, a reinforcing member located in a passage below the roof and extending longitudinally to locations past the lower ends of the anchor members, and clips abutting the roof for connection with the anchor and reinforcing members. The system also includes apparatus for placing the anchor and reinforcing members in tension for additional support of the roof. The members are connected to the clips at locations of substantially the same elevation on the clip below the mine roof.

Abstract: An apparatus is provided for performing multiple operations on a conventional open-die forge press, and includes a rotatable top punch assembly and stationary bottom die assembly. The top punch assembly includes a mounting fixture secured to the press crosshead, a holder plate rotatably mounted on the fixture, a plurality of punches extending downwardly from the holder plate, and motor means for indexing the punches sequentially into forging position over the bottom die assembly. A method is also provided for making valve pots, including upsetting a heated metal block in a split die and punching a hole through the block, the improvement in which during the upsetting step a vertically reciprocable member is extended so as to close a bottom opening in the split die, in order that the split die will function as a closed die, and during the punching step the reciprocable member is retracted so as to allow a punch-core to fall through said opening.

Abstract: A continuous casting mold is adapted for measurement of the clamping force exerted on the mold sidewalls. A method of adjusting the mold size includes measuring the clamping force and adjusting it to a predetermined value, preferably a value related to the size to which the mold is adjusted. The method may also include monitoring the clamping force during casting and adjusting it so as to maintain it constant at said predetermined value.

Abstract: A sealing means for a coke oven chuck door. The sealing means includes a metal sealing member which has springiness and flexibility and is supported cantilever fashion on the inside of the door frame. An insulation block is interposed between the sealing member and door frame. The sealing member has a knife edge flange which extends around its perimeter and is automatically aligned with a sealing surface on the main door on which the chuck door is mounted.