Abstract: A pyrometallurgical process for the treatment of ores, particularly lateritic nickel ores containing nickel oxide and/or nickel silicate, employing halide and metallic iron, and optionally carbon, for extraction of the metal in concentrate form easily recoverable by magnetic separation procedures.

Abstract: A process for the production of high purity iron sulfate monohydrate from an iron sulfide mineral feed involving a leaching, purification, crystallization and dehydration procedure to recover a solution of iron sulfate containing iron sulfate polyhydrates and to convert iron sulfate polyhydrates in a series of steps to monohydrate crystals. The process can be also advantageously used with iron sulfide feed materials containing non-ferrous metals with full separation and recovery of the non-ferrous metals in the sulfide residue of the leaching and purification process of this invention. It can also be used for the purification of industrial pickle liquor solutions which can be treated with the iron sulfide mineral feed in this process leach circuit with full recovery of the ferrous and non-ferrous metals content of these solutions.

Abstract: A foaling alarm adapted to be positioned around the withers and belly of a mare just behind the forearms and having, in the region of the withers, an RF transmitter, and a position sensing switch which energizes the transmitter when the mare lies down on her side in foaling position. The transmitter, when thus energized, actuates a remote receiver which, in turn, actuates an audio and/or visual alarm for summoning aid by the mare's attendant or owner.

Abstract: A single adjustable control is commonly connected with each of a plurality of feedback channels, which are selectively coupled in an amplifier circuit to provide the latter with different basic gains, to adjust the respective basic gains of the amplifier circuit by corresponding fractional or proportional amounts of respective ranges of permissible gain chain for each channel, thereby simultaneously to correct or to calibrate each channel for different amounts of drift of the like.

Abstract: A protector switch is added in the power supply to open on failure of the door interlock switch to open when the oven door is opened. The monitor switch that closes as the door opens, after the door switch should open, will if the latter does not occur create a power short-circuit ahead of the oven; in this circuit there is a heat responsive electrical resistance element that mechanically holds the protector switch closed against a switch opening bias. Such element will fail under the short circuit current and release the protector switch to shut off the power to the oven. The resistance element can be a wire of predetermined resistance, with current limiting capability, or an off-the-shelf control resistor.

Abstract: A control circuit for a gas appliance includes ignition and hold circuits, the former providing for series energization of the heater of a thermal fuel valve and an electric igniter positioned proximate the appliance burner port area for ignition of the gas fuel and air mixture exiting the same and the latter providing for direct energization of only the igniter to hold or to maintain the appliance at a warm temperature. Moreover, the fuel valve includes an exterior selector mechanism for facile calibration and/or other adjustment for effective valve operation with either of two different gases at respectively different pressures, such as, for example, natural gas and bottled gas.

Abstract: A seal for a ball bearing score and the like comprising a ring of elastomeric material axially and angularly fixed to the nut so that an internal projection from the bore of the ring makes sliding sealed engagement with a line or a circumferentially narrow band of the thread groove of the screw from crest to crest thereof, and so that an internal one-turn helical rib from the bore of the ring makes sliding sealed engagement with the crest of the thread of said screw from one side of said projection to the opposite side thereof. The seal herein is further characterized in that the aforesaid internal projection is of circular cross section for sliding sealing engagement with a thread groove of any helix angle.

Abstract: A non-light emitting insert for a fluorescent lighting fixture is used in place of a fluorescent lamp to complete a plural lamp ballast circuit so that the ballast is effective to illuminate properly any remaining fluorescent lamp coupled therein. The insert appears externally as a conventional fluorescent lamp including end electrical terminations that fit in the sockets of a fluorescent lighting fixture, and to an extent the insert duplicates the electrical effect of a lamp in a two lamp ballast circuit. Using the insert a reduction in the light output and a substantially corresponding reduction in consumed electrical power are achieved for a plural lamp fluorescent lighting fixture arrangement while at the same time the components of the ballast circuit are operated at reasonably normal electrical and temperature levels.

Abstract: A segmental V belt consists of a plurality of body segments selectively joined to form an endless belt of any desired length. Such body segments, which can have sidewall perforations or formations to increase wear life, may be joined by connecting the exposed adjacent ends of reinforcing members otherwise embedded in the body segments, or by connecting the radially outer surfaces of the body segments to a reinforcement strip superimposed thereon.

Abstract: A socket for dual in line package integrated circuits has a high retention force for a correspondingly low insertion force. Each of a plurality of contacts in a dielectric housing bends relatively easily as a lead of such package is inserted and as such insertion is completed the contact assumes a residual position for good electrical and mechanical connection to the lead. Friction between the lead and contact effects movement of the latter to change the geometry thereof as the former is withdrawn, whereby the contact binding force against lead increases to increase the force required for completion of such withdrawal.

Abstract: A support harness for a child who, due to brain damage or disease, lacks trunk or head control sufficient to achieve or maintain a normal sitting position, said support harness being characterized in that it comprises two layers of a fabric which combines firmness and softness and which is of shape to define a back portion with upper and lower strap means for fastening the harness to the backrest of a chair; laterally extending side flaps (with foam rubber or like padding therein) adapted to be wrapped over the sides of the child's body between the armpits and the hips and across the chest and abdomen and secured together in overlapping relation by releasable fastening means; a longitudinal flap from the lower end of the back portion which is of progressively narrowing width to pass through the child's crotch and upwardly over the overlapped lateral flaps; and shoulder straps for releasably interconnecting the upper ends of said longitudinal flap and back portion.

Abstract: A swaging apparatus in which a pusher member pushes a hose coupling sleeve having a hose end portion therewithin downwardly into a die cavity of a closed die defined by mating segmental die members in a retainer to radially deform said sleeve into gripping engagement with said hose characterized in that upward retraction of the pusher member automatically opens the die by effecting upward and lateral separating movement of said die members thus to release the swaged hose-coupling assembly for downward discharge from between the separated die members and through said retainer. The swaging apparatus is further characterized in that before the pusher member commences its downward swaging stroke on the next unswaged hose-coupling assembly inserted upwardly through the retainer and between the separated die members, the latter are released for movement by gravity into mating engagement within said retainer.

Abstract: A lightweight composite motorcycle wheel construction characterized in that it comprises a wheel unit casting including concentric outer and inner rim and sleeve portions integrally connected together by angularly spaced spokes; and a hub unit casting having an interference fit within the bore of the sleeve portion thus to frictionally retain the hub and wheel units together against relative angular and axial movement while the bearing receiving bore in the hub unit is located and held coaxially of said rim portion, the wheel and hub units additionally being welded together to prevent relative angular and axial movement despite application of torque and axial loads exceeding the frictional resistance of the interference fit.

Abstract: A game includes a plurality of pegs to be removed from a board by a player in a timed play duration determined by a timer set in motion by the player. The timer mounted on the game board includes a rod and a disc positioned thereabout so that a player can determine his own timed play duration by raising the disc to the top of the rod and spinning the disc so that it resists falling immediately to the board whereupon the timed duration expires.

Abstract: An adjustable floating reamer characterized by its relatively great length and small diameter embodying a closure cap for the diametrically slotted end of a shank member which has a long and thin tubular portion which closely embraces and supports the slotted end of the shank member and which has a closed end in abutting engagement with the slotted end of the shank member to define therewith a rectangular slot in which overlapping reamer blades are slidably supported for radial adjustment and for radial floating movement about a pivot which is spaced a great distance from the blades so that no binding action occurs during the floating movement of the blades during use of the reamer.

Abstract: An improved aluminum electrode hanger contact and method of making the same, which includes a longitudinal hole drilled in the end of the hanger. In one embodiment, a slot or slots are cut in such bar into the hole. Tin-coated copper inserts are inserted in the slot or slots with the inner ends thereof projecting into the hole and the outer ends closely underlying or projecting from the end of the hanger. In other embodiments, circular passages are provided transversely of the drilled hole and inserts in the form of tin-coated copper rod or rods are inserted in the passages. Superheated molten metal is permitted to flow into the hole filling the same, such molten metal preferably being obtained by the ignition of an aluminothermic welding composition. When the molten metal solidifies, the inserts are secured to the hanger, thus providing a low cost and significantly improved voltage drop contact between the aluminum hanger and a conductor.

Abstract: A lock nut, which is relatively free running as it is screwed onto a male threaded member, provides a two-way locking action as it is tightened to abutment with a confronting load bearing surface, with the result that a breakaway torque that is a high percentage of the applied locking torque must be applied to loosen the lock nut. One or both ends of the lock nut have an annular dish shape commencing at the relatively high corners at the juncture of adjacent pairs of wrenching side faces and recessing into the body toward the threaded bore therethrough. The corner high points are thus relatively thinned for biting and spreading into the confronting surface to provide one locking function, and the corner high points also act as fulcrum points to obtain early torque transfer from the outer edges to the body of the lock nut over a large number of threads for controlled bending of the body to bear radially into locking engagement against the male threaded member.

Abstract: A thermal timer produces a timed duration output in response to a thermal input to a thermal storage device and a thermal energy leakage parameter from that storage device. The storage device preferably is a metal slug positioned in a silica aerogel insulative powder environment, and the thermal input is supplied by an electrically energized PTC heater. A thermostat output device monitors the temperature of the heater and the storage device to effect a distinguishable output, for example, by completing or opening an electrical circuit, in response to the temperature thereof. The thermal timer may be utilized in a range appliance or the like to effect a warning indication during cool down of that appliance.

Abstract: A marine holding tank receives an excrement and water charge from a toilet and converts such charge into vapor and ash components for efficient and hygienic storage and/or removal. The holding tank is provided both with a rotary mixer to form a liquid-solid mixture from the excrement and water and with a heating means to reduce the mixture by vaporizing the liquid and incinerating the solids, thereby to complete the charge conversion. The heating means consists of two heating elements with selective energization so that one element may be independently operated for low heating or the two elements may be simultaneously operated for high heating. The heating elements are part of an energizing circuit that is controlled by a D.C. circuit, with such control circuit being automatically operative to discontinue the heating process when the temperature in the tank has reached a preselected point and to maintain the energizing circuit closed irrespective of A.C.

Abstract: A single-shot rifle having a receiver with a lever-activated falling block action characterized in that the breech-block carries the firing pin, the hammer, the hammer spring retainer, the toggle link which is linked to the lever, and the trigger whereby the entire assembly may be removed from the receiver for cleaning, servicing, or replacement simply by removing the lever-receiver pivot pin. The rifle herein is further characterized in that the receiver has therein an extractor-ejector mechanism which is actuated by the breech-block movements.