Abstract: A material grinding mill having a grinding chamber with a closed bottom, a material feed disposed to force ground material to move axially of the rotary grinder to an outlet at one or both sides of the grinding chamber, a scroll liner directed to lie adjacent the path of rotation of the grinder and form a venturi throat inlet to the grinding chamber, a supply of drying medium admitted to the mill to be sucked through the venturi throat for drying the material during the grinding while moving it through the side outlet, and a classifier for returning oversize material to the grinding chamber through the venturi throat.

Abstract: A fishing fly box includes a cylindrical housing in which a spool is located, the spool being mounted to rotate on hollow spindles that project inwardly from the end walls of the housing. The housing has an opening which is normally closed by a cover, but when the cover is open, flanges at the end of the spool are exposed where they may be easily manipulated to turn the spool. Strips of soft retaining material extend axially along the spool to retain the flies, for the hooks of the flies are easily embedded in these strips. The fly box is suspended from a lanyard, and to retrieve a fishing fly, the fisherman merely inserts a finger of his left hand into the spindle of the left end wall, and with the thumb of that hand moves the cover to its open position. Again using the thumb he turns the flange of the spool until the desired fly is at the opening, whereupon the fly is withdrawn.

Abstract: This disclosure concerns a self-opening portable swimming enclosure which can be coiled into a compact shape for storage and which, when placed in the water without restraint, will open by itself into a circular shape with a protective netting suspended from floats which provide an upstanding lip above the water surface around the periphery of the enclosure.

Abstract: Heating apparatus for prepackaged foodstuffs, like nut meats in transparent packages, in which the package is dropped into a support for presenting the sides of the package to infrared radiant heat which is delivered along with cooling air to prevent damaging the film material of the package. The apparatus includes controls for limiting the time of package exposure to the heat and mechanism to lock the package support against dumping the package until it has been heated, and to unlock the support when the heated package is ready to be dispensed.

Abstract: A method of eutectic bonding of a stainless steel fine mesh screen directly to a surface of a titanium member by cleaning the surfaces of the screen and member and subjecting those parts to pressure to secure an intimate contact and heat to effect the bonding thereof without destroying the integrity of the screen and adversely affecting the wicking action of the screen which is of prime importance.

Abstract: A bearing assembly for supporting the spindle of a machine tool includes a single row tapered roller bearing and a closure at each end of the bearing for isolating the interior of the bearing from the surrounding atmosphere. A liquid refrigerant and lubricating oil are mixed in the closure at the small ends of the rollers, and are directed into the space between the tapered raceways. This refrigerant, upon encountering the tapered rollers, the raceways along which the rollers roll, and the thrust rib against which the large ends of the rollers bear, vaporizes and extracts heat from those bearing components, thereby enabling the bearing to operate at a generally uniform temperature close to room temperature. The vaporized refrigerant flows through a port in the closure at the large ends of the rollers and then into a heat exchanger where it is condensed, the liquid refrigerant being then directed to the closure at the small ends of the rollers.

Abstract: An inflatable air cushion has a base and air cells arranged in rows upon and projecting away from the base, with the outer ends of the air cells forming a supporting surface. The base and air cells are formed from a flexible elastomeric material and are in communication through the base, so that when some of the air cells are deflected by a supported load, all the air cells nevertheless remain at the same internal pressure. Thus, those air cells that are against the load exert equal forces on the load, irrespective of the amount of deflection. Adjacent air cells when inflated are adapted to contact each other along their sides so as to provide a generally continuous supporting surface. To this end, each air cell when deflated has four fins arranged symmetrically about its axis, with each fin having spaced apart side walls. The side walls of adjacent fins are connected near the center of the air cell to provide depressions that open out of the air cells.

Abstract: A process of continuously chemically milling refractory metals, e.g., titanium using a supersaturated milling solution which form a water soluble precipitate, milling at temperatures of 140.degree.-160.degree. F., and using two chemical milling tanks so that the milling solution is pumped from one to the other when the precipitate builds up in the first tank to a predetermined level. The water soluble precipitate is easily and inexpensively disposed of and the process makes more efficient use of chemicals.

Abstract: A one-piece plastic insulated beverage receptacle holder having longitudinal side panels, one of which is wider than the remainder and recessed to accommodate ad copy or the like.

Abstract: In order to join a tube to a tubesheet of a heat exchanger, the end of the tube is inserted into a socket at the end of a hole that passes through the tubesheet. The socket is large enough to receive the tube, but the hole is not, so the tube bottoms out in the socket and is thus located both radially and axially by the socket. A ring mold is fitted around the tube and moved against the tubesheet, so that its end fits into an annular groove that surrounds the socket in the back face of the tubesheet. The ring mold has a chamfered confining surface that surrounds the tube where the tube emerges from the socket. Once the ring mold is in place the portion of tube that is within the socket is welded autogenously to the tubesheet by rotating an electrode within the hole. The molten weld metal flows outwardly to the confining surface, but is prevented by that surface from flowing circumfentially, even when the welding is performed with the tube in a horizontal position.

Abstract: A machine for breaking frozen lumps of coal into smaller lumps includes a housing, a rotor which revolves within the housing and has teeth for engaging the coal, and a breaker plate which together with the rotor forms a converging space into which the rotor moves the coal to break up any frozen lumps. In addition, the machine has a baffle plate which at its lower end pivots on the housing and is inclined downwardly toward the rotor so as to direct large frozen lumps of coal into the teeth of the rotor, at least when the machine is configured to process frozen coal. With little effort, the machine may be converted to a by-pass configuration which permits unfrozen coal to pass through the housing without coming into contact with the rotor, and this of course reduces wear on the rotor.

Abstract: An extracting machine for withdrawing an electric traction motor from a wheel spindle in which that motor is normally positioned, includes a frame, a carriage mounted upon the frame to move forwardly and rearwardly, a head mounted on the carriage such that it can be rotated, and arms mounted upon the head such that they can be spread apart or moved together. The frame mounts upon the tines of a fork lift truck which is maneuvered to locate the extracting machine opposite to the end of the spindle. Once the motor has been jacked a few inches out of the spindle, the head is rotated so that the free ends of the arms will fit into the motor, whereupon the carriage is advanced on the frame until stops on the arms bear against the end of the motor. This positions pads that are upon the arms opposite to an inwardly presented machined surface in the motor. Then the arms are spread apart, enabling the pads at their free ends to tightly grip the machined surface in the motor.

Abstract: A machine for stacking and bundling flexible sheets, such as the signatures that are delivered from a printed press, includes a succession of aligned conveyors. The sheets are deposited on the first conveyor where they accumulate in a generally horizontal disposition, one on top of the other, and the first conveyor withdraws sheets from the bottom of this pile and conveys them to a gate in a shingled condition. At the gate, which is narrower in width than the sheets, the sheets bow forwardly and rise upwardly at their leading edges until they stand on edge. It is in this condition that the sheets pass onto a second conveyor which moves them through another gate that is narrower than the first gate, so that the degree of bowing increases. The second conveyor moves slower than the first conveyor and as a result the flexible sheets consolidate in the upright condition on the second conveyor.

Abstract: A self-clearing shredding apparatus for disposal of waste material which includes hard to crush or shred objects, in which the apparatus is provided with individually driven pair of cutter shafts in a common horizontal plane for reducing the waste material or for converting the cutter shaft operation to one in which they perform the duty of a conveyor to transport the objects which are objectionable through a side opening. The apparatus which performs the above activity is connected up to a programmable controller which causes the apparatus to operate in a prescribed method.

Abstract: A heat generating system using solid fuel in a water jacketed combustion chamber for supplying hot water to units for space heaters and hot water storage units, and in which control means is provided for operating the fuel combustion mode to obtain recovery of the products of combustion during low rates of combustion, and to greatly reduce emissions during increased rates of combustion, the control means including thermostatic units having selected points of active and inactive responses.

Abstract: A door locking assembly in which the latching mechanism of the assembly comprises a latch bolt operated by rotary means, which can be the door knob or a key operated tumbler, for normally operating the latch bolt, dead lock means for blocking the retraction of the latch bolt, auxiliary latch means having link means normally urging it into a position for moving the dead lock means out of latch bolt blocking position, electrically operable means cooperating with the latching mechanism for controlling the auxiliary latch means, lock bar means operative to prevent turning of the rotary means, and an operating element connected between the lock bar and the link means for the auxiliary latch means for determining the operative position of the lock bar means in relation to the position of the dead lock means relative to the latch bolt.

Abstract: A machine for installing a foil insert in a container lid such that the insert may be subsequently sealed to the mouth of a container after the lid is placed on the container includes a punch for blanking an insert from foil sheet, and a plunger having a head that emerges from the punch and carries the blanked insert forwardly to the lid. As the plunger advances, a folding arm presses against the tab and folds it over onto remaining or disc portion of the insert, and while the arm folds the tab, retaining fingers of a holding element hold the insert against the plunger head on each side of the tab to ensure that the tab folds at the proper location. Only after the tab is folded over does the plunger deposit the insert in a lid that is supported in the path of the plunger on a lid holder.

Abstract: One concrete slab is laid adjacent to a previously laid slab with a slip forming machine while the concrete mix of the previously laid slab is still plastic. The slip forming machine includes a tractor of the type used with conventional slip-form mules, and in addition a slip-form mule that has the capability of laying a slab of plastic concrete mix against a previously laid slab of mix that is still plastic. The mule has a frame that is attached to the tractor, and the frame carries a hopper and slip form which are united into a single unit, with the hopper opening into the front end of the slip form. The unitized hopper and slip form pivot on the frame about a vertical axis that extends through the front of the frame. The rear end of the slip form moves on a transverse slideway and a hydraulic cylinder is connected between the frame and slip form to urge the side of the slip form snugly against the edge of the previously laid slab as concrete mix extrudes from the slip form to provide the adjacent slab.

Abstract: A roller grinding mill having the grinding roll assemblies pivotally suspended from a frame rotated by a drive shaft, means supplying lubricant and pressure air to the internal structure of the mill for providing primary air seals to keep abrasive matter from working into the bearings with pressurizing the lubricant to provide a source of air internally of the grinding roll assemblies to set up a secondary air seal in the event of a break or leak in the pressure air which can interrupt the primary air seal, and means to monitor or detect a condition in the mill which would result in damage to the bearings if not attended to.

Abstract: An apparatus for mixing the fountain solution used by lithographic printing presses includes a mixing tank and a pump unit for withdrawing the fountain solution from the tank and directing it into a distribution line that leads to several printing presses. Water for the fountain solution is supplied through a water line containing a solenoid valve. The additives, on the other hand, are pumped from drums into measuring containers located above the mixing tank, there being a separate measuring container and pump for each additive. Each measuring container has a solenoid valve at its bottom for releasing its additive into the tank when opened and a float switch for de-energizing its pump when the additive reaches a prescribed level in the measuring container. The water and additive valves, as well as the pumps, are controlled automatically, and to this end each measuring container has its own float switch, while the mixing tank contains high and low level float switches.