Abstract: A method for the beneficiation of coal by selective agglomeration and the beneficiated coal product thereof is disclosed wherein coal, comprising impurities, is comminuted to a particle size sufficient to allow impurities contained therein to disperse in water, an aqueous slurry is formed with the comminuted coal particles, treated with a compound, such as a polysaccharide and/or disaccharide, to increase the relative hydrophilicity of hydrophilic components, and thereafter the slurry is treated with sufficient liquid agglomerant to form a coagulum comprising reduced impurity coal.

Abstract: A backlash-free drive for the infeed mechanism of a microtome, comprising a threaded spindle (1) mounted so as to be rotatable but axially non-shiftable, as well as two nut elements (2a, 2b) connected such that they are non-rotatable but can be shifted in an axial direction relative one another, said nut elements being spring-loaded against one another in an axial direction. Acceptable tolerances for the conicity of the threaded spindle are obtained by making use of at least one plain bearing (11,13;12,14) between the threaded spindle and nut element (2a), said nut element being connected to a specimen holder (16) via a gear. Fences (30,32;31,33) acting in the direction of spindle rotation protect the thread from deformation, as do two frictional clutches (24;25), which prevent excessive driving torques from having an effect and allow the user the option of operating the micrometer with manual feed (22) or an automatic feed device (26).

Abstract: A stereomicroscope for comparing photographs is disclosed. The microscope includes a pair of complementary occluders with one occluder positioned in an intermediate image plane of each side of the stereo optical system, which also includes a conventional image rotator and zoom system to permit independent adjustment of the orientation and size of each image. The complementary occluders accentuate small differences between nearly identical photographs by providing a border at which an object present in only one photograph will appear or disappear as the two photographs are simultaneously scanned.

Abstract: A film accumulator having a fixed set of rollers and a moveable set of rollers to provide a serpentine path for accumulating film during photo interpretation is disclosed. The accumulator permits a substantially planer path for loading when the moveable rollers are located below the fixed rollers and a serpentine path for accumulating film when the moveable rollers are above the fixed rollers.

Abstract: The instant invention features a novel binder having opposing panels, with a first panel having a binding strap gripping means at an edge of a first end of the panel and a binding strap extending from a second end of the panel such that the binding strap can be extended from the second end of the panel, around and/or through the second panel back to the first end of the gripping means of the first panel. Such arrangement allows securing of the second panel in adjustable, opposing juxtaposition to the first panel, thereby securing loose papers between the panels.

Abstract: A glove construction for use by a hockey goalie includes a padded back structure, a removable close-fitting glove component, and flexible fittings to attach the inner glove to the padded back construction in a firm and secure manner yet retaining the necessary flexibility to perform the athletic operations required of a goalie.

Abstract: A microtome knife holder comprises a support element provided on the base connected to a microtome and at least one jaw for clamping the knife that is adjustable along a rail of the support element in the same direction as the cutting edge of the knife and releasably securable on said supporting element at a desired location. The guide means if formed of a prism rail of substantially dovetailed profile, a slotted foot portion of the holder is formed with a matching complementary profile and compressible by means of at least one screw engaging around said prism rail. Different holders, usually for different types of knives, can easily be slid on or off the rail. A quick release clamp and edge guard are also disclosed.

Abstract: A portable ultrafiltration device is disclosed comprising a prefilter, pump, membrane filter cartridges, temperature sensors, pressure sensors, process interdiction and control means placed to detect temperature and pressure variations of a feed mixture being processed by the device, and means cooperating with said temperature and pressure means to interdict the operation of the device to prevent damage to the components. Provision is also made for an improved feed mixture pick-up tube comprising a sliding gate means for interdicting liquid pick-up from an oil/water feed mixture.

Abstract: The invention relates to a centrifugal pump particularly adapted for pumping fibrous suspensions from within a reservoir, wherein the pump includes a rotor arranged wholly within the reservoir for cooperation with the bottom wall thereof to effect fluidization of suspension and discharge of the fluidized suspension from the reservoir for passage through the pump, wherein an entrained gas, such as air, is withdrawn from the pump by means of a unique pump-out mechanism disposed rearwardly of a shroud of an impeller of the pump and including pump-out vanes and a repeller shroud cooperating with the impeller shroud and pump-out vanes to define radially opening flow paths, wherein flow openings extend across the impeller shroud for flow communication with the radially opening flow paths. The mechanism may also include repeller vanes carried by the repeller shroud to extend rearwardly of pump-out vanes.

Abstract: A gasket and method for detecting the status of an installed gasket is disclosed, wherein the gasket comprises a series of protruding projections which vary from a visually detectable, defined direction when installed improperly. This invention has particular utility in manufacturing operations where improper gasket installation is difficult to detect during assembly, particularly in the automotive heat exchanger industry.

Abstract: An improved fluid pick-up assembly for the control of the flow of fluids upwardly through a pick-up tube from a fluid reservoir is disclosed comprising, a slidable tubular gate, disposed over a hollow tube having fluid inlet voids therein for fluid flow from said reservoir to said hollow tube, said gate sliding upwardly or downwardly over said inlet voids in response to a fluid level within said reservoir. Provision is also made for said fluid pick-up assembly in combination with an ultrafiltration device.

Abstract: A portable ultrafiltration device is disclosed comprising a prefilter, pump, membrane filter cartridges, temperature sensors, pressure sensors, process interdiction and control means placed to detect temperature and pressure variations of a feed mixture being processed by the device, and means cooperating with said temperature and pressure means to interdict the operation of the device to prevent damage to the components.

Abstract: An attachment for a prosthetic forearm useful to assist amputees in playing a stringed instrument is disclosed. The attached includes a chord finger that is adapted to extend across all of the strings of the instrument, and a note finger adapted to contact one or two strings of the instrument. The spacing between the fingers may be adjusted using the conventional prosthetic operating cable attached to a lever extending from the side of the chord finger.

Abstract: A cooling chamber on a microtome has an internal space which is observable and accessible from above and which accommodates an object holder and a tool for processing the object. The cooling chamber structure also includes a supply tank for accommodating a liquid cryogenic agent, the tank communicating with the cooling chamber space by way of a downwardly leading feed conduit for evaporated gaseous cryogenic agent. The feed conduit is directly in the form of a heater which can produce a controllable heating action so that the gaseous cryogenic agent can be heated along its flow path from the tank into the cooling chamber space, to provide for uniform temperature distribution in the cooling chamber space.

Abstract: An air canopy ventilation system is disclosed which comprises a surface having two substantially parallel spaced apart side walls surmounted at their respective upper edges by a canopy. A vent means having a plurality of outlets extends between the side walls and substantially the whole length of the front edge of the surface. A fan means connected to the vent means is adapted to drive a flow of air through the vent means upwardly to form a curtain of air over the front of the system, thereby entraining within the area fumes and odors. The upwardly flowing air, fumes and odors are removed by an exhaust means. The exhaust means can include a filter means and a return air means. The system has applications in commercial cooking systems, laboratories, and areas requiring removal of fumes and gases from an enclosed working surface.