Abstract: Apparatus for measuring the rolling resistance of tires. An endless belt is supported on rotating drums. The upper run of the belt passes over a hydrostatic bearing which supports the belt against the force of the tire pressing against it. The hydrostatic bearing is formed by a plurality of nozzles directing water at high pressure against the underside of the belt. A pressure differential is created between the upper and lower surfaces of the belt to press the belt closely adjacent the nozzles so that when a tire is pressed against the belt, it does not create a depression in the belt.

Abstract: A radial mandrel is provided having a plurality of alternating and interfitting large and small segments mounted on a pair of cones, which cones are movable axially toward and away from one another to in turn move the segments radially inwardly and outwardly between a contracted and expanded position. The radial mandrel includes an improved mechanism for axially moving the cones comprising a quill adapter and scroll sleeve adapted for use with a drive shaft of standard configuration. The scroll sleeve is formed with spiral grooves which engage the cones and are operable to move the cones axially toward and away from one another as the scroll sleeve is rotated.

Abstract: Disclosed are maintenance-free cells and batteries of the lead/acid type which have improved deep cycle life. The plates are flat and are oriented horizontally as a stack in a cell which contains unabsorbed free electrolyte. The free electrolyte wets but does not cover the top surface of at least one negative plate. The vertical dimension of the plate stack must not exceed one-half its major horizontal dimension.

Abstract: A suspension for a scraper-tractor. The tractor has an axle housing which is supported on a frame by hydraulic cylinders connected to a hydraulic circuit that includes a gas-filled accumulator to provide cushioning of the frame with respect to the axle housing. A pair of longitudinal arms are connected at one end by ball joints to the frame. At their other ends, the arms are connected by vertical pivot pins to the axle housing. A transverse track bar is connected between the frame and the housing.

Abstract: An analog compensation circuit for compensating for mechanical instrumentation resonance. The transfer function of the instrumentation resonance phenomenon is determined, and the compensation circuit is constructed to produce the inverse transfer function of the instrumentation resonance transfer function. The input of the compensation circuit is connected to the electrical instrumentation output signal. With the instrumentation resonance modeled as the equivalent of a second order filter, the compensation circuit includes sections for producing at a combined output a first intermediate signal representative of a constant term, a second intermediate signal representative of a first derivative term, and a third intermediate signal representative of a second derivative term.

Abstract: In the production of silicon articles at an elevated temperature, a stream comprising a controlled mixture of an oxygen-containing first gas and a second gas is admitted to the processing chamber. The first gas is one which partially dissociates under the conditions in the chamber to form both oxygen and the second gas. The second gas is one which is not harmful to silicon at the conditions in the chamber. Substantially equilibrium conditions are established in the chamber so that the dissociation of the first gas to oxygen occurs reversibly. The partial pressure of oxygen (P.sub.O.sbsb.2) is sensed in the chamber during processing of the article. In response to the P.sub.O.sbsb.2 level, the ratio of the rates of flow of the oxygen-containing gas and the second gas is adjusted so as to maintain the P.sub.O.sbsb.2 at a level less than about 10.sup.-6 atmosphere, and usually no greater than about 10.sup.

Abstract: Door structure is provided for a wood-burning stove which is less susceptible to warping in use than a conventional flanged stove door opening. The door opening is formed by a process of cold drawing or extruding a rounded lip or flange which is integral with the stove front plate. Internal door structure provides angulation of the door with respect to the stove front plate.

Abstract: A bushing for the deck of drilling rig in which slowly rotating drilling pipe (drill string) move downwardly to form a bore in the earth. The bushing includes an outer shell, an inner shell mounted for rotation within the outer shell and an elastomeric bushing mounted within the inner shell for rotation therewith. The bushing is formed of a plurality of arcuate segments which are snugly fitted against the drilling pipe by a garter spring which allows for limited expansion of the segments with respect to each other to accommodate pipe of differing diameters. The end portions of the segments overlap one another so that as the bushing is expanded, a seal against dust and fluids is maintained.

Abstract: A temperature responsive blower control attachment for a wood-burning stove. The attachment is mountable to or seatable on a heated external surface of the stove and provides thermostatically regulated operation of an electrically operated blower or fan that circulates air heated by the stove. Temperature is sensed through an element which is in contact with the heated surface of the stove, but the other circuit elements of the attachment are isolated from and are not subjected to the potentially damaging temperature of the stove surface.

Abstract: An apparatus for the continuous porcelain enameling of sheet ware including the combination, in succession, of a drying zone for the incoming ware either integral or separate, a pre-heating zone for the ware following the drying zone, a heating zone for the ware after the pre-heating zone or zones, in which the porcelain enamel coating is fused onto the surface, and a cooling zone or zones. Burner means are provided for introducing hot combustion gases into a serpentine tube radiant heater which is in the heating zone to heat the ware by means of flameless radiation. After leaving the heating zone, the hot combustion gases are directed into the final pre-heating zone where they transfer some of their heat to the ware passing through that zone. Finally, the combustion gases leaving the pre-heating zone are directed into the drying zone where they transfer heat by convection to remove moisture and slightly pre-heat the ware, whereupon the relatively cool combustion gases are exhausted from the drying zone.

Abstract: A drill head having a housing enclosed at its lower end by a lower cover and enclosed at its upper end by a drive cap which carries a drill tool chuck. Radial-thrust bearings are located in the upper portion of the housing. A driven bevel gear is located below the radial-thrust bearings. A hollow passageway through the drill tool, chuck, bearings and driven gear is sealed by a face seal located below the driven gear and mounted in part on the lower cover so as to be easily replaced by removal of the lower cover. A driving bevel gear, on a horizontal axis, is mounted on an adapter on the rear end of the housing, the adapter receiving a hydraulic motor connected to the driving gear.

Abstract: Apparatus for cutting sheet molding compound in which the compound is sandwiched between two liner sheets and fed from a letoff roll onto a conveyor. The compound is conveyed past longitudinal slitters and a transverse cutting knife which cut the compound into rectangular segments of preselected size. Before a sheet reaches the area of the cutting operation, the upper liner is removed. At the area of the transverse cutting, the lower liner is diverted from the sheet compound to pass under an anvil against which the transverse cutting mechanism operates. The lower liner is then passed upwardly to return to a position underneath the sheet compound in order to support the sheet compound on the liner as it passes along the conveyor where it is picked off by the operator.

Abstract: Method and apparatus for applying insulation and a metal jacket to a pipe wherein insulation is first wrapped around the pipe and held by a clamp. A metallic jacket is then wrapped around the insulation and held by a clamp while the adjoining edges of the jacket are permanently secured together. The insulation and jacket respectively are temporarily held on the pipe by a clamping device which consists of a strap, a keeper at one end of the strap, a handle pivoted to the other end of the strap, the handle having a pivotal latch member which is engageable with the keeper.

Abstract: A zinc or zinc oxide anode having at the center thereof a body of an inert absorptive material which establishes an anolyte reservoir within the anode itself. This reservoir is sandwiched between two laminates, each of which is preferably a three-layer integral laminate comprising a current collector, a zinc or zinc oxide active layer and a separator which presents the outside surface of the laminate. The anode displays low shape change in comparison to conventional anodes.

Abstract: A catalyst for curing unsaturated polyester resins comprising a mixture consisting essentially of about 20 to 40% by weight of 2,5-dimethylhexane-2,5-diperoxybenzoate, about 10 to 25% by weight of tert-butyl peroxy (2-ethyl hexanoate), and about 40 to 65% by weight of tert-butylperoxy isopropyl carbonate.

Abstract: Novel ionic compounds of the class[Fe{CO(NH.sub.2).sub.2 }.sub.n (H.sub.2 O).sub.6-n ].sup.++ SO.sub.4.sup.--wherein n is 2, 3, 4 or 5, are produced by solid state reaction between a ferrous sulfate hydrate and urea under extended intensive physical impingement conditions, as for example by ball milling for a period in excess of 2 hours, until particles of an unusual characteristic shape are formed. Uses of the compounds include correcting iron deficiencies in plants.

Abstract: A collapsible material handling container comprising a deck bed having a plurality of support legs thereon, and a deck mat fixed to the upper surface of the deck bed. A first side wall is hinged along the lower edge thereof to the deck mat, and a pair of opposed end walls are hinged along the front edges thereof to the opposite side edges of the first side wall. A second side wall is hinged along the lower edge thereof to the deck mat. In the erected condition of the container, the second side wall is connectible to the end walls by releasable lock mechanisms. The upper portion of the first side wall may comprise a gate having a releasable lock mechanism which coacts with the end walls for connecting the gate to the walls, in the erected condition of the container. The hinges between the first side wall and the end walls extend vertically along only the lower portion of the first side wall.

Abstract: An electronic circuit with an output that may be used, for example, to control a servo system which positions grinders of a tire grinding machine to correct tires with large cleats is disclosed. The electronic circuit is responsive to an analog electrical signal to detect whether or not the rate of change in amplitude of the analog electrical signal equals or exceeds a preselected limit. If the rate of change in amplitude of the analog electrical signal does not equal or exceed the preselected limit, the output of the electronic circuit has a characteristic that is similar to the analog electrical signal. If the rate of change in amplitude of the analog electrical signal equals or exceeds the preselected limit, the output of the electronic circuit preferably remains constant at an amplitude which the analog electrical signal attained prior to the change in amplitude at a rate equal to or in excess of the preselected limit.

Abstract: A method and composition for enameling ferrous objects which eliminates the necessity of pickling and nickel coating the ferrous object prior to enameling. The ferrous surface is merely cleaned and then a reactive fritted coating is applied to the clean surface. The chemical and physical properties of the reactive coating are such that the coating fuses at a relatively low temperature to provide a fused coating which chemically etches the underlying ferrous surface to provide a good bond between the two. The reactive coating should contain at least 5% of one or more adhesion promoting oxides, and at least 1% of the 5% mentioned consists of cupric oxide. A cover coat of a conventional frit may be applied over the reactive coating. During firing, the reactive coat melts first and bonds itself to the underlying ferrous surface, whereupon the cover coat fuses and forms the finished procelain enamel coating.

Abstract: A self-aligning bearing construction including a ball which can be used in a pillow block mounting mode, or a flange mounting mode, or in special mounting for specific applications. A pair of generally parallel flats are formed on the ball on opposite sides of the shaft bore therein, and two cylindrical lands extend transversely around the ball, connecting the flats. As a result of a sizing step, the ball may be formed with a bead or rib running around the ball centered on the cylindrical lands and across the flats. The lands and flats provide clearance spacing so that the bead does not engage seats in a cap and a base between which it is clamped. The ball is cooperable with a series of different caps and bases for use in different mounting modes and can receive any of a series of bearing inserts to provide different bearing service.