Abstract: A method for separating and recovering substantially pure aluminum, iron and silica from fly ash, a by-product of coal combustion, includes reacting the fly ash with aqueous fluosilicic acid and aqueous hydrogen fluoride at temperatures sufficiently high to form aqueous silicon fluoride vapor and fluorides and fluosilicate of aluminum and iron, separating the aluminum and iron fluorides and fluorosilicates from the aqueous silicon fluoride vapor, hydrolizing the silicon fluoride vapor to form silicon dioxide in substantially pure form and hydrogen fluoride, recovering and recycling the hydrogen fluoride for reuse in the process, and separating the aluminum and iron fluorides and fluosilicates from one another, and recovering substantially pure aluminum fluoride, substantially pure iron and other substantially pure metals, by electroplating or otherwise.

Abstract: An apparatus adapted for vehicle frame and chassis repair having a vehicle bed with horizontal portions for fixedly anchoring a damaged vehicle preparatory to repair and particularly straightening of the vehicle. The bed tilts toward the ground for mounting and removal of the vehicle. A plurality of pull tower assemblies are movably mounted with respect to the bed. Each pull tower assembly includes an upright tower column and a pivot arm connected to the bed. A power head assembly rotatably mounted on the top of the column includes a frame and a hydraulic actuator with a first portion fixed to the frame and a second portion horizontally movable with respect to the frame. A flexible tension member has a first end connected to the frame and a second end connectable to the vehicle at a remote location for exertion of a pulling force.

Abstract: A method for treating water or waste water to remove pollutants therefrom includes treating fly ash comprising aluminum, iron and silica with an aqueous base, recovering a base-treated, solid fly ash, washing the base-treated solid fly ash with water, recovering a rinsed, base-treated fly ash solid, reacting the rinsed, base-treated fly ash solid with mineral acid, and recovering an aqueous, solubilized acidic fly ash leachate, then mixing the aqueous, acidic solubilized fly ash leachate with water or waste water to remove pollutants therefrom, or with sludge to reduce its resistant to dewatering.

Abstract: A method of producing a source of rich (in the general range of 900 BTU per cubic foot) gaseous fuel, and a method of producing a rich gaseous fuel, both include reducing metallic manganese or a mixture of metals in which manganese predominates and carbonaceous material to a powder finer than 200 mesh, mixing the powders in a proportion by weight between 1 to 1 and 4 to 1 manganese to carbonaceous material (available carbon), and heating the mixture, in a reducing atmosphere, to a temperature of between 600.degree. and 950.degree. C. to substantial equilibrium by completion of reaction, generally for a period of about forty minutes. The production of gaseous fuel includes the step of treating the source material with a reactant taken from the group consisting of steam and a mildly acidic solution. The source material residue is then recycled.

Abstract: Electrically conductive paths are selectively engaged by a pair of electrical contacts that are carried in a pair of holders. Each holder is pivoted by an actuator. Each holder also carries a spring biased detent plunger that cooperates with V-shaped cavities in a switch housing to provide an over-center feel.

Abstract: An inert solvent containing a coating material to be reacted is mixed with a liquid activator which is fed through an orifice into contact with the coating material and then into a mixing chamber. The mixing chamber is provided with special agitating means for obtaining effective mixing of the coating material with the activator. This activating means may comprise a chain held in place within the mixing chamber with washers at either end of the chamber. The mixed coating material and activator is then fed through a conduit into an applicating gun which applies the coating on a container or transportation vehicle.

Abstract: A battery changing apparatus for replacing a spent battery with a charged one on an electrically powered vehicle including a support with at least two battery support sections for supporting batteries adapted for use on an electrically powered vehicle. A spent battery is removed from the vehicle and transferred to one of the support sections. The relative positions of the apparatus for removing and transferring the battery and the support can be changed so that a charged battery can be removed from another support section. The apparatus for removing and transferring the battery can remove the charged battery from the other support and transfer it to the vehicle.

Abstract: Apparatus for damping operator induced oscillations of a controlled system responding to an operator controlled signal (DEP) utilizing a lag-lead filter (14) for frequency and amplitude estimation of the control input, and a rectification and smoothing filter (16) for producing a signal proportional to the absolute value of the frequency and amplitude estimate for use in suppression of the control system output signal (DEC). In one embodiment, this is accomplished by computing a correction signal in a correction generating section (18). In a second embodiment, a second rectification and smoothing filter (21) produces a signal proportional to the absolute value of the controlled input signal. A ratio of the outputs of the first and second rectification and smoothing filters is then used in a generator (24) to generate a gain factor k.sub.

Abstract: In a continuous drum mix asphalt plant, dust is exhausted from an intermediate zone of the drum mixer between its drying and mixing zones. The dust is exhausted radially through openings into a collection housing, which communicates with a dust collector and exhaust blower. An end housing at the discharge end of the drum communicates with the same dust collector and blower. Dampers are provided to control the relative proportion of air exhausted from the drum through the respective housings. Aggregate deflectors on the interior wall of the drum at the intermediate zone allow air and dust to flow while inhibiting the flow of aggregate. The collection housing surrounding the intermediate zone is of a size such as to produce a reduction in the velocity of the air as it passes out of the drum. Consequently, it serves as a knock-out box for the collection of larger particles which are carried out of the drum, but which settle out of the air stream as a result of the velocity decrease.

Abstract: Strong, low basis weight, spontaneously dispersible sheets of modified cellulosic fibers. The sheets are prepared from modified cellulosic fibers such as cross-linked carboxymethyl cellulose or essentially acidic sodium carboxymethyl cellulose. Mixtures of modified fibers with unmodified fibers are also disclosed. The process of preparing the sheets comprises the steps of airlaying the fibers to form an airfelt, increasing the moisture content of the airfelt, and compacting the moisturized airfelt.

Abstract: A moisture vapor impermeable sheet for the fabrication of hygroscopic particulate material container cartons having small cross-machine direction curl propensity, said sheet being projecting lamination of a thin film of thermoplastic polymer material between opposite laminae of high and low density cellulosic fiber sheets, the low density sheet being permeated with water subsequent to lamination and reeled in a straight line cross-direction configuration for at least 20 minutes.