Abstract: A hydraulic rivet tool having a pair of opposing supports on a frame one of which holds an anvil and the other supporting a hydraulic cylinder. A hollow sleeve is extensible from the cylinder and carries a guide to clamp the workpiece. Contained within the sleeve for relative movement therewith is a dual purpose piston carrying a rivet engaging member. A spring is interconnected between the sleeve and the piston to restrict their relative motion until the sleeve guide has clamped the workpiece. Hydraulic fluid under pressure delivered to the cylinder first causes the piston and sleeve to extend from the hydraulic cylinder and causes the sleeve to clamp the workpiece. The piston then, overcoming the spring restricting the relative motion between it and the sleeve, continues its movement to perform work on the rivet.

Abstract: Structure for locking a latching mechanism provided for controlling the opening of a range oven door selectively closing an oven cavity, so as to prevent the opening thereof when the oven cavity is at a high temperature such as during a pyrolytic self-cleaning operation. The locking device includes a thermal sensor which is caused to be disposed in accurate correlated relationship to the oven wall outwardly thereof as a result of a housing associated with the thermal sensor being secured to the oven wall. Resultingly, the sensor is retained in accurate preselected heat transfer association with the oven cavity while being free of exposure to fumes and gases generated in the oven cavity.

Abstract: A modular sheet metal door structure consists of a plurality of upright modules of the same length which are fixedly connected to one another and have coplanar main webs forming one face of the door. A sheet metal sheath fixedly connected to side webs of the modules forms the other face of the door and has upright marginal portions which closely embrace the modules to form upright door sides. Identical sheet metal header means are fixedly secured to the ends of the modules to provide the ends of the door, and the header means are constructed to be detachably connected to stems by which the door may be suspended from track-mounted carriages for sidewise movement with either end of the door up.

Abstract: A system for moving large quantities of pulverulent material from receiving hoppers, such as those of a fly ash precipitator, into a pressurized air conveyor pipeline. Separate auger conveyors move material from a first line of receiving hoppers and from a second line of receiving hoppers into gravity material inlets at opposite ends of an effectively airtight casing of a pressure mechanical conveyor wherein auger conveyor screws of opposite hand move it toward a central outlet through which it drops into the pressurized air conveyor pipeline. The auger conveyors and the pressure conveyor augers operate continuously; and the system is cycled to alternately feed material into the pressure conveyor casing at receiving hopper pressure, which is about atmospheric pressure, and out of the pressure conveyor casing at pipeline pressure. The cycles of two or more pressure conveyors are out of phase with one another so they feed material into the pipeline consecutively to provide level pipeline flow.

Abstract: A patio door lock having a linkage for reciprocating movable bolts in the top and bottom of the door into and out of locked positions. A six bar linkage is provided to reciprocate bolt rods connected to the bolts by axially directed forces. A tension spring biases the bolt rods together, and stops are provided to limit an over-center motion of the linkage as assisted by the tension spring, one stop holding the linkage and bolt bars in the locked position.

Abstract: A pole-setting apparatus for raising a pole from a horizontal position and setting it in a vertical position in a hole and having a boom assembly extended between a ground-engaging dolly and a cradle-support structure, with a cradle frame pivotally mounted between its ends to the cradle-support structure, a single binder member for holding a pole in association with the cradle frame throughout manipulation of the pole, a single hydraulic cylinder connected between the cradle-support structure and the cradle frame for causing relative movement therebetween, and a quick-connection structure for pivotally connecting the boom assembly to the ground-engaging dolly.

Abstract: A wiper mounted for rotation with the shaft of an apparatus such as an electric motor for preventing wicking by lint collecting on the portion of the housing surrounding the shaft opening thereof. The wiper, in the illustrated embodiment, is carried on the lubricant slinger mounted to the shaft and extending outwardly through the housing opening. The slinger, in the illustrated embodiment, is pressfitted to the shaft so as to permit the wiper to be accurately juxtaposed to the outer surface of the housing defining the shaft opening. In the illustrated embodiment, the wiper is formed integrally with the slinger. The wiper is preferably resiliently carried by the slinger so as to accommodate axial displacement of the motor shaft tending to bring the wiper into engagement with the housing portion defining the shaft opening.

Abstract: A coil retainer and terminal assembly for use in an electrodynamic device, such as an electric motor. The assembly includes a coil retainer having portions for retaining spaced portions of the motor coil in association with a core portion of the electrodynamic structure. The coil retainer further defines terminal support portions for receiving terminals to which connection portions of the coil are connected. The terminals, in the illustrated embodiment, further include connecting spade portions. The terminals are arranged to be slidably fitted to the coil retainer terminal support portions and cooperating locking structure is provided on the terminals and terminal support portions for locking the terminals in the installed disposition on the coil retainer. The locking structure, in the illustrated embodiment, includes a deflectible shoulder portion of the terminal arranged to have locking engagement with a transverse shoulder on the coil retainer in the installed disposition.

Abstract: A display and burial system wherein a base has a lid member associated therewith which is movable between closed and open viewing positions. A two-part link holds the lid member in open viewing position with one link part pivotally connected to the lid member and the other link part being releasably connectable to a frame member of the base by entry into a slot or recess therein when the link is partially collapsed. An end of the second link part engages a pin within the recess and, thereafter, the lid member is moved to fully open position and the link parts move to a straight-line relation wherein the link is locked to the pin within the recess and the lid member is securely held in open viewing position. A reversal of steps enables disconnection of the link from the base with the link retaining its connection to the lid member and being collapsible to a storage position within the lid member.

Abstract: A plastic whistle including a main whistle body provided with a relatively narrow, elongated throat terminating at one end in a mouthpiece opening and at its other end, in an enlarged sound chamber. The throat and the chamber are open along a common side of the body. An orifice is located in the body and opens to the chamber and is disposed in the side of the body adjacent the common side mentioned above. A closure is provided for the common side and has a peripheral size and shape substantially the same as the periphery of the common side and mounts a tab extending partially into the throat so as to have opposite sides of the tab in abutment with opposed parts of the body at the mouthpiece opening to thereby support the body against an external clamping force applied by the teeth of a user of the whistle to prevent fracture of the throat.

Abstract: A spring assembly for supporting a tumbling board including a helical spring and a mounting cap formed of a one piece homogeneous resilient material receiving one end of the spring. The mounting cap has a flat base for abutment with the underside of a tumbling board and a generally cylindrical projection extending from one side of the base into the interior of the spring end. An annular lip extends from the base and is spaced radially outwardly of the projection to define therewith a groove for receipt of the spring end. The groove narrows as the base is approached such that insertion of the spring into the groove will cause the lip and/or the projection to deform so that the resilience of the material of which the cap is formed will wedgingly cause the cap to tightly grasp the spring end. An aperture is provided in the base for receipt of a fastener by which the cap may be secured to a tumbling board and a protective cover is received on the other end of the spring.

Abstract: A driving mechanism for reciprocating a windshield wiper arm having maximum velocity at the mid-portion of the wiper stroke and zero velocity and minimum acceleration at the outboard ends of the stroke. The driving mechanism includes a slotted follower having a semicircular shape with ends pivotally secured to a housing. An output drive shaft extends from the motor housing and has a curved crank attached thereto for rotation. The crank includes a pin at one end which extends into the follower slot for converting the rotary motion of the output drive shaft into reciprocable motion of the follower. The follower transmits the reciprocable motion to a drive shaft connected to the wiper arm for reciprocating the wiper across the windshield surface.

Abstract: An olefin polymerization and copolymerization catalyst active in the presence of an alkyl aluminum cocatalyst is prepared by mixing, in the presence of a solvent, particles of a silica or alumina material having reactive surface groups treated with a fluorine compound and with a compound of magnesiumhydrocarbyl or a complex of the general formula (MgR.sub.2).sub.m (AlR.sub.3 ').sub.n where R and R' are alkyl or aryl groups and m/n is between about 0.5 and 10, inclusive, to form a hydrocarbon insoluble reaction product which is then mixed, in the presence of a solvent, with a titanium, vanadium or zirconium halide, oxyhalide or alkoxyhalide, followed by separation of the solvent. The disclosure also includes a method of making such catalysts and a method of making polymers of one or more 1-olefins by the use of these catalysts under polymerizing conditions.

Abstract: An improved magnetic structure for a magnetic ore separator has an arcuate base attached to a support which in turn is connected to end pieces which mount shaft connectors by which the magnetic structure is mounted on a shaft. A plurality of radial elements are positioned in spaced relationship between the base and an outer cover. A plurality of azimuthal elements are positioned on the base between the radial elements. A plurality of angled elements are positioned between the radial elements and the azimuthal elements. The direction of magnetization of each element is displaced angularly from that of the adjacent element in uniform increments of less than 90.degree..

Abstract: An apparatus for selectively lifting an animal trap to an above-the-ground disposition as an incident of an animal being caught in the trap. The apparatus includes structure defining a vertical slide, structure for disposing the slide to extend in an upright manner from the ground, a lift element slidably carried on the slide, structure for connecting the trap to the lift element, and structure responsive to an animal being trapped by the trap to rapidly slide the lift element from a preselected lower position on the slide to an upper position wherein the trap is disposed above the ground.

Abstract: Apparatus is provided for drying pulverulent material, for example, coal slurry wherein the slurry, after preliminary drying, is introduced into a vibrating chamber carrying internal flights and subjected to vacuum to remove moisture. A pair of such containers may be provided so that slurry may alternately be introduced into one container while the other container is vibrating under vacuum so as to provide a continuous drying method.

Abstract: A vacuum cleaner structure having a control for reducing the total current delivery to the vacuum cleaner as when both a suction motor thereof and a brush motor thereof are being operated concurrently. The control includes an "On-Off" switch mounted on a portion of the suction hose for the vacuum cleaner. The invention comprehends the provision of such a current-reducing control where the full load currents of the suction and brush motors cumulatively total an amount greater than a preselected safe current deliverable to the vacuum cleaner. The control is arranged to be used with a vacuum cleaner having a suction hose connected between a suction unit and a cleaning unit thereof, such as a floor cleaning unit. In one form, the control utilizes a two-conductor wire suction hose, and in another form, the control utilizes a three-conductor wire suction hose.

Abstract: A simplified miter box suitable for use with a conventional carpenter's saw comprises upper and lower relatively rotatable platforms with a pair of radially spaced, upstanding saw guide posts fixed to the lower platform. Each post has a vertical, upwardly open saw guide slot extending therethrough. The slots are radially aligned with each other. The upper platform rotates about the first post and has an outer circular edge captured for sliding movement by a complementary groove in the second post. An upstanding workpiece support is fixed to the upper platform, and an angular scale alignable with a reference mark of the lower platform is inscribed on the upper platform outer edge.

Abstract: A colorimetric urea determination method, reagent, and reagent kit useful in end point and kinetic urea determination. Urea in a liquid sample reacts with o-phthalaldehyde and chromotropic acid or one of its salts in the presence of a linear long hydrocarbon chain amidobetaine to produce an intensely colored reaction product, the concentration of which is linearly related to the urea concentration in the sample.