Abstract: One of a pair of laterally spaced ball projecting wheels is adjustable laterally with respect to the other for accommodating the projecting of balls of different diameters, and a ball feed chute associated with the wheels is formed in lateral segments one of which is movable laterally with the laterally adjustable wheel for varying the width of the feed chute to correspond with the spacing between the wheels.

Abstract: A tiltable support for a wheelchair includes a main base for supporting a wheelchair, an angular base section for supporting the wheelchair in a rearwardly tilted position, and a back rest for supporting the back of the wheelchair while in the tilting position. In one embodiment, the support may be moved manually between one position in which the main base rests upon an underlying horizontal support, for disposing a wheelchair patient in an upright sitting position, and a second position in which the angular base rests upon the horizontal underlying support for disposing the wheelchair patient in a rearwardly reclining position. In a second embodiment, power driven mechanism is integrated with the support for moving it between the upright and reclining positions of the wheelchair patient.

Abstract: An elongated brace member is attached adjacent its inner end pivotally to a base member clamped to the outer circumference of a wheel, a plurality of which support through their hubs an elongated assembly of interconnected irrigation pipes. The inner end of the brace member is connected to the base member through an extensible and retractable damper cylinder which functions to delay the pivotal movement of the brace member from a retracted, inoperative position in which it extends substantially parallel to the irrigation pipe line, to an extended, operative position in which it projects angularly outward and downward from the wheel into engagement of its outer end with the ground. In an alternate construction the base member is secured to the outer end of an elongated post which extends radially outward from the irrigation pipe.

Abstract: A modular framework, arranged to be installed in a main support frame for an elongated conveyor, supports at least three transverse drive beams for reciprocation in the longitudinal direction of the framework, each of the drive beams being connected to a source of power for independent reciprocation, the sources of power also being supported by the framework. A plurality of slat connectors are spaced apart transversely of the framework and are secured in groups one to each of the drive beams for longitudinal reciprocation therewith, each of the slat connectors serving to secure thereto an elongated conveyor slat arranged to extend the full length of the elongated conveyor. Slat guide members are mounted on the framework, as well as on the main support frame, in longitudinal alignment with the slat connectors, for guiding the slats in their longitudinal reciprocation.

Abstract: Endodontic files extend freely through openings in a gauge plate supported through a central threaded opening by an elongated, rotatable screw extending upwardly from a base. A post extends upwardly from the base and slidably engages the gauge plate to prevent rotation of the plate while allowing it to move vertically relative to the base upon rotation of the screw, whereby to afford adjustment of the vertical distance between the base and gauge plate to correspond with the depth of radicular pulp to be removed from the root canal of a tooth. Depth stoppers on the files are adjusted along the length of the files to bring them into abutment with the upper surface of the gauge plate, thereby establishing the depth to which the files are to penetrate the root canal. A cover fits removably over the gauge plate and base to retain the files on the gauge plate during transport and to accommodate autoclaving and sterile storage.

Abstract: A fluid inlet passageway communicates at one end with a source of fluid under pressure and at the opposite end with a fluid outlet passageway. A piston type control valve is movable axially in the fluid inlet passageway and is in fluid pressure sealing engagement with the opposite end portions of said passageway but not with an enlarged intermediate portion thereof, at which position of the valve fluid under pressure may pass around the valve and exit the outlet passageway. The valve is switched between said end and intermediate positions by a stepped stop block on the projecting end of the piston rod engageable releasably by an abutment on a cam follower lever which mounts a cam follower roller positioned for engagement with a pair of relatively adjustable cam elements mounted for rotation with a timer shaft driven by a wind-up spring clock timer.

Abstract: A label dispenser for dispensing adhesive labels from rolls of label tape, comprises a rectangular enclosure having a plurality of adjustable-width partitions for holding variable width label tape rolls in an upright position, and a hinged lid which can be opened to insert fresh tape rolls. The free ends of the label tapes are fed through a pair of sponge rubber strips, mounted, respectively, at the upper edge of the enclosure front wall and the forwardmost portion of the lid for mutual contact when the lid is closed. A hasp-type lid fastener serves to draw the lid downwardly, compressing the two rubber strips together, whereby to grip the label tapes frictionally between them when the lid is fastened shut.

Abstract: Infrared or visible light radiation is arranged to traverse substantially the entire cross sectional area of a passageway as a wide, flat beam having a thickness not substantially exceeding the minimum thickness of particles to be counted and a width substantially greater than the thickness, and is detected as a field of radiation of substantially constant intensity. When a particle falls by gravity through any portion of the field, the detected change in intensity functions to activate an electronic counter which provides a direct digital readout of the number of particles passing through the field in a given period of time, distance, or area.

Abstract: A hydrapneumatic suspension unit for a vehicle has a first and and a second chamber separated by valve assembly in communication with both chambers for controlling the flow of liquid therebetween. The first said chamber is liquid filled and includes a slidably mounted piston connected by a linkage to the road wheel. The second chamber includes a first compartment containing the liquid and a second compartment containing a compressible medium, wherein the first and second compartments are separated by a floating piston or a diaphragm member to permit compression and restoration of the compressible medium. The valve assembly includes a damping valve, a low-restriction check valve for permitting one-way flow of liquid from the first to the second chamber, and a damping bypass valve for enabling quick return of liquid from the second chamber to the first chamber. Interconnection may be provided to establish equalization between two or more suspension units.

Abstract: A microminiature electrical delay line utilizes an m-derived filter formed by depositing a film of permalloy or other high permeability metal on a quartz or other dielectric substrate, then depositing a layer of quartz or other dielectric over the permalloy film, after which a plurality of microminiature thin film inductance coils are deposited on the dielectric layer and joined together electrically in series, a top layer of quartz or other dielectric then is deposited over the interconnected coils and a strip of permalloy or other high permeability metal is deposited over the top dielectric layer to extend across the coils, a gap being provided in the strip of permalloy at the central axis of each coil.

Abstract: A connector, by which a pair of loops at the ends of a pair of cables are connected together releasably, include a body having therethrough a longitudinal opening which is of uniform width of a first longitudinal plane and tapered in width in the second longitudinal plane perpendicular to the first plane, and a hook extending longitudinally outward from the larger width opening end of the body. The hook may extend in a plane which is offset laterally from but parallel to the second plane, or in a plane which is perpendicular to said second plane and across said tapered opening in the body.

Abstract: At least one group of at least three elongated slats are mounted side by side on a frame for longitudinal reciprocation to form a conveyor, the slats being connected to adjustable drive mechanism which is operable in a first position of adjustment such that there are always a greater number of slats of each group moving simultaneously in a conveying direction, with the remaining slat or slats of each group moving in the opposite direction, and in a second position of adjustment such that all of the slats of each group move simultaneously in the conveying direction, to initiate movement of a load to be conveyed, whereupon the drive mechanism is adjusted to said first position of adjustment. In one embodiment of the invention, elongated flexible seals are provided between adjacent pair of slats, each seal being secured to one of the slats of the pair and slidably engaging the other slat of the pair, whereby to form a substantially non-porous conveyor.

Abstract: A mounting base secured to the rear bumper of a school bus pivotally supports at least one step plate for movement between an operative horizontal position extended rearwardly of the bumper for use by children exiting the bus by way of the rear emergency door, and a retracted vertical position extended upwardly adjacent the rear end of the bus. A catch mounted on the emergency door of the bus is arranged to extend downward sufficiently to overlap the retracted step and secure it in retracted position when the emergency door is closed. When the door is opened, the catch is moved therewith away from the step, whereupon the latter swings downward to the operative horizontal position.

Abstract: At least one group of at least three elongated slats are mounted side-by-side on a frame for longitudinal reciprocation to form a conveyor, the slats being connected to a fluid pressure drive mechanism which is operable to move all of the slats of each group from a start position simultaneously in a load-conveying direction and then to move the slats of each group sequentially in the opposite direction from the advanced position back to the start position, the slats of each group being interengaged releasably in the conveying direction to insure simultaneous movement.

Abstract: A wood burning stove is formed with double front and rear side walls of heat conductive metal interconnected by heat conductive spacer fins and providing air passageways by which room air is heated by conduction from the walls which are heated by the burning of wood deposited on a firebox grate made up of spaced bricks supported by metal holders secured in heat conducting relation to said inner side walls. The rear side air passageway is divided into central and outer vertical sections the central one of which is closed at the bottom end and communicates with the atmosphere through an opening in the outer wall intermediate its vertical ends and with the stove interior above the firebox and below the grate through openings in the inner wall intermediate its vertical ends and adjacent its bottom end, respectively.

Abstract: A voltage regulator includes a first normally closed switch arranged for releasably connecting the field coil terminal of an engine-driven DC alternator or DC generator to its appropriate positive or negative output terminal. The first switch is controlled by an electric actuator having an electric circuit arranged for connection across the output terminals of the alternator or generator and is operable at a predetermined lower level output voltage to open the first switch, whereby to limit the output charging voltage to said lower level which is predetermined to effect charging of the battery without significant consumption of water.

Abstract: A dry insulated, impulse voltage resistant, multi-layer series wound coil having air ducts between layers for use in transformers, reactors, and the like is made with minimum solid insulation spacing between adjacent conductors and maximum air spacing radially between coil layers. The method of making includes winding on a form of alternate layers of insulation and conductors. After one layer of winding is complete, cloth-wrapped duct-forming molds are supported on the windings and further insulation and conductors are wound around the whole assembly. When the desired number of layers is complete, the assembly is vacuum cast in a resin and the forms and the molds are then removed.

Abstract: A room section having a ceiling, floor, opposed side walls and an outer end wall, fits freely in an opening in a wall of a travel trailer for reciprocative movement between a position extended from the trailer, to provide increased living area, and a position retracted into the trailer for travel. The room section is supported for such movement by mechanism located under the trailer floor and connected to the room section at the outer wall of the latter.