Abstract: The robot is composed of a figure simulating a boxer which is mounted to a post. A first arm is mounted to the post for pivoting in a vertical plane. A second arm is mounted to a vertical rod mounted within the figure. A prime mover causes the rod to rotate and as it does so, the second arm rotates in a horizontal plane. A roller is connected to the rod and periodically contacts the second arm thereby causing the arm to elevate. Gravity causes the second arm to fall when it is not contacted by the roller. The roller is so positioned to the rod that it causes the second arm to elevate when the first arm is behind the figure and allows the second arm to fall when the first arm is in front of the figure.

Abstract: Two platens having glass plates are pivotally interconnected by means of hinges and U-shaped brackets. Spring loaded fasteners hold the platens closed but the fasteners may be opened to permit the platens to pivot open. The two platens are seated one on top of the other upon a housing within which are mounted lamps which produce ultra-violet rays. The position of the platens can be reversed so that the lower platen is on top of the upper platen. There is a cavity between the closed platens for accommodation of a negative, a layer of photo-sensitive composition and bearer strips. The photo-sensitive composition is exposed to the ultra-violet rays first on one side then on the other by reversal of the positions of the platens so that both a base on one side and a raised image on the other side are formed. The thickness of the bearer strips governs the thickness of the finished printing plate.

Abstract: In a method of splicing strips of thermoplastic material to form waterstop joints, the strips are first clamped in longitudinal alignment with their adjacent ends spaced apart. While the strips are so clamped, a routing tool is used to cut complementary rebates at these adjacent ends, after which the strips are moved into end abutting relationship while the longitudinal alignment of the strips is maintained, the rebated ends being brought into a half-lap configuration. The cooperating ends are then welded together by means of an electric heating element which was inserted between the ends prior to their being clamped together.

Abstract: The closure consists of inner and outer caps which are disposed concentrically about the mouth of a container. A flap or latch is cut into the side wall of the inner cap and the latch is biased such that its upper edge is normally disposed beneath a lip formed in the brim of the container to lock the inner cap about the mouth of the container. The outer cap is maintained concentrically about the inner cap by means of the lower edge of the latch which is accommodated in an annular groove formed in the inside wall of the outer cap. The caps may be removed from the container by first forcing the outer cap downwardly relative to the inner cap. As the outer cap moves downwardly the wall of its groove contacts the lower portion of the latch and causes the latch to pivot to a position at which its upper edge is no longer beneath the brim lip. Secondly the inner cap is grasped along with the outer cap and the two caps are removed together as a unit from the container.

Abstract: The boot includes a heel portion which together with a sole and vamp define a space for accommodation of a wearer's foot. A stiff inner upper is integrally connected to the vamp and heel portion and a stiff outer upper surrounds the inner upper. The outer upper is connected to the inner upper at the rear of the boot only and is free to move in the forward and rearward direction relative to the inner upper but is substantially immovable relative to the inner upper in the lateral direction.

Abstract: The fastener is formed within a protective helmet provided with a crown suspension and a head suspension. The crown suspension has a central portion adapted to contact the top of a wearer's head and has radially outwardly extending legs. The head suspension includes an outer strap which encircles the wearer's head at approximately the level with respect to the wearer's head of a normal hat band. A barb is joined to the end of each leg and tapers in thickness from its juncture with the leg to its end. A barb is also joined to a portion of the strap at its upper edge and likewise tapers in thickness from its juncture with the strap to its end. A number of flaps are connected to the inside wall of the helmet. Each flap has a slot through which the leg and strap extend, and above which the barbs connected to the straps are positioned. The barbs connected to the legs are accommodated in the space between the flaps and the inside wall of the helmet.

Abstract: The sealing device is used to interconnect a base of an electrical meter of the type having a transparent enclosure secured to the base and a flange connected to and spaced outwardly from a meter socket. The device includes concentrically disposed inner and outer bands. The inner band is provided with spaced apart limbs which straddle the base and flange and thereby interconnect them. The inner band is also provided with flaps which contact the adjacent inner wall of the outer band. The flaps permit movement of the outer band to a position in which it maintains the inner band in place but resists movement of the outer band away from such position.

Abstract: The device is useful for attaching and detaching an electrical meter of the type having a base secured to a glass enclosure and to one or more prongs. The prongs in turn are adapted to fit into sockets provided in a meter base having a rim provided with a flange spaced apart from the meter base. The device includes a U-shaped stabilizing member having pads mounted at the free end. The pads are accommodated in the space between the flange and the meter base. A collar is slideably connected to the stabilizing member and is adapted to releasably engage the glass enclosure. A handle is pivotally connected to the stabilizing member and two or more links pivotally interconnect the handle and the collar for causing the collar to slide relative to the stabilizing member upon pivotal movement of the handle. Such pivotal movement causes the prongs to move selectively into and out of the sockets.

Abstract: The stair-climbing device is suitable for transporting a load up or down a flight of steps. The device includes a frame on which the load is seated and a number of load-bearing shoes which engage successive steps in the flight of steps to produce displacement of the device along the flight of steps. The shoes are pivotally connected to sprocket chains which are activated by a reversible electric motor. An arm is pivotally connected to the frame and is provided with a sensing head disposed forward of wheels on which the device rolls. As the device rolls forward on the tread of a step, the sensing head contacts the tread until it is beyond the forward edge whereupon the head falls with resulting pivotal movement of the arm.

Abstract: The nozzle includes a sleeve and a hollow body concentrically disposed within the sleeve. A hollow cylindrical baffle housing is coaxially maintained within the body by vanes which extend between the housing outer wall and the body inner wall. Formed on the outer wall of the body is a thread which mates with a thread on the inner wall of the sleeve to permit rotation of the sleeve relative to the body between two stop positions. A baffle is secured to the baffle housing and is provided with a head which, as the sleeve is rotated toward the first stop position, approaches a baffle seat formed on the sleeve and thereby diminishes the quantity of liquid discharging from the nozzle.

Abstract: The assembly is composed of a framework having a longitudinal passage for receipt of a pipe to be wrapped and a number of crawler wheels which contact the outer wall of the pipe and which cause the framework to move longitudinally relative to the pipe. The assembly also includes brushes and wrapping assemblies mounted to rings which circumscribe the pipe. Rotation of the rings causes the brushes to scour the pipe outer wall and tape to unwind from the wrapping assembly onto the pipe. Hydraulic motors are provided on the assembly for powering the crawler wheels, brushes and wrapping assemblies. The hydraulic motors are activated by hydraulic fluid pressurized by pumps located remote from the assembly.

Abstract: A process is described for producing cobalt powder having a particle size of about 2 microns or smaller. The process involves two basic operations: Firstly, finely divided cobaltous carbonate is prepared by precipitation from a cobaltous ammine-ammonium sulphate solution by reacting the solution with carbon dioxide. Secondly, the cobalt carbonate precipitate is separated from the solution and is dry-reduced with hydrogen under controlled conditions of time and temperature to produce finely divided elemental cobalt powder. Cobalt powders produced in accordance with the invention are particularly suitable for manufacture of sintered carbide products as well as for use in magnetic products such as magnetic inks and tapes.

Abstract: The process involves subjecting finely divided particles of copper-bearing mineral sulphide ores or concentrates to a first stage leach in which the particles are leached in an aqueous ammoniacal ammonium carbonate solution in the presence of free oxygen to provide a first stage leach slurry which contains dissolved copper values. Residue is separated from the first stage leach slurry and is subjected to attrition in order to rub off an outer layer therefrom and expose surfaces of the residue beneath the layer. The resulting residue is passed to a second stage leach which is carried out in the same way as the first leach. Solution is removed from the second leach stage and is recycled to the first leach stage. The first stage leach solution is further treated for recovery of copper and ammonium sulphate.

Abstract: The invention relates to a method of trimming selvage from a succession of books. According to the method, a saw is provided having a pair of oppositely facing surfaces which merge at a cutting edge. One of the surfaces is substantially flat throughout its length or throughout all but the area of the surface adjacent the cutting edge. The latter area is bevelled as is the other surface of the saw. The books are advanced toward the saw and the saw is so positioned relative to the books such that its cutting run is normal to the direction of book advance and is parallel to the plane of the pages of the books. The saw is also positioned such that its first-mentioned surface faces pages trimmed by the saw and its other surface faces selvage trimmed by the saw.

Abstract: A hydrometallurgical process for treating iron containing metal sulfides for rendering iron and non-ferrous metal values active and amenable for selective extraction and separate recovery. Sulfur values can be controllably produced as elemental sulfur or as sulfuric acid to supply acid requirements of the process, while substantially obviating the discharge of sulfur-containing gases to the atmosphere. Ores and concentrates of the sulfides are thermally activated by sequentially heating and reducing said sulfides in a countercurrent flow of heating and reducing gases respectively in a reactor whereby the reaction products of the reducing gas and sulfides, together with liberated labile sulfur, are controllably combusted with oxygen to satisfy heat requirements of the thermal activation process and to convert sulfur values to SO.sub.2 gas. The activated sulfides are subjected to an acid leach in aqueous sulfuric acid for production of ferrous sulfate and evolution of H.sub.

Abstract: The crown suspension consists of upper and lower dome-shaped elements each having a central portion and radially extending legs. The legs of the upper element are connected to the shell and means is provided for adjusting the position of the legs of the lower element relative to the upper element legs to enable the lower element to be fitted to various sized heads.

Abstract: A method is disclosed for leaching finely divided lead sulphide bearing material to convert contained lead values to soluble lead acetate with concurrent conversion of sulphur values associated with the lead sulphide to an elemental state. The method involves forming a slurry consisting of the material dispersed in an aqueous medium containing free acetate ions and having a pH below 5.1. The slurry is reacted at a temperature of 60.degree. to 120.degree.C. with a free oxygen-bearing gas under a partial pressure of oxygen of 20 to 60 p.s.i. in order to convert lead sulphide to soluble lead acetate with concurrent production of insoluble elemental sulphur.