Abstract: In an explosive powder-driven setting gun in which a piston guide is axially displaceable within a casing and a driving piston is axially displaceable within the piston guide, a stop pin is provided for varying the volume of the combustion gases within the piston guide at the rear end of the driving piston. The stop pin extends between a locking piece in the rear end of the casing, through the rear end of the piston guide into contact with the rear end of the driving piston. An adjustable stop surface for the stop pin can be provided integrally with the locking piece, or as a separate member movably mounted in the locking piece. By adjusting the stop surface the spacing between the rear end of the driving piston and the rear end of the piston guide is determined for establishing the initial size of the combustion chamber for the explosive gases which propel the driving piston.

Abstract: Two pairs of interdigitated rotatable members are arranged at right angles to one another and are connected by a chute leading downwardly away from one of the pairs and transversely to the other of the pairs so that paper can be first cut up into strips and then subsequently recut to form a confetti. The rotatable members are formed of spools coaxially mounted on a drive shaft, each of the spools being formed of circular or cylindrical members with lesser diameter portions therebetween for purposes of spacing. A comb is provided in association with at least one of the rotatable members and is provided with extra tongues accommodated in grooves formed on the rotatable members in order to strip paper therefrom in order to prevent the paper from becoming entangled in the rotatable members and jamming the same.

Abstract: A cooled horizontal-axle grinder for the predispersion of solids in liquids, which grinder incorporates a grinding chamber having grinding bodies such as balls therein. The grinder has a circulating pump for the product to be treated which circulates in a continuous manner through the grinding chamber. The rotatable grinder axle carries discs or agitator elements. The grinder includes a separating sieve designed to retain the grinding balls within the grinding chamber while permitting the finely ground product to flow into the interior thereof and then along and around the axle. The sieve includes a cylinder coaxial and rotatable with the axle and having slots of suitable shape to realize the aforementioned function. The cylinder has product outlet holes which communicate with a surrounding cylindrical product chamber. A separator structure surrounds this rotatable cylinder and coacts with a housing wall for defining a narrow flow passage which communicates directly between the grinding and product chambers.

Abstract: The invention concerns a method of influencing the degree of grinding of material which is fed into the peripheral portion of the grinding chamber of a mill whose inclined and upwardly-divergent open bowl or plate-shaped grinding chamber has a central outlet for ground material, said mill having a heavily inclined rotary shaft and at least one cooperating roller in the grinding chamber. The degree of grinding, which corresponds to the retention time of the material in the grinding chamber, is controlled by adapting the rpm of the mill and the incline of the rotary shaft, so that material in the section of the grinding chamber most inclined toward the horizontal plane slides downward toward the central outlet in steps corresponding to the desired degree of grinding.

Abstract: A machine for tearing open small bags containing city solid waste material and for separating out plastic film material and/or the bags, includes an endless belt conveyor which carries on the surface thereof a plurality of aculei which engage bags containing waste material placed on the surface of the conveyor belt. The belt follows a path of a first straight or rectilineal length and a second or return straight or rectilineal length.

Abstract: An improved grinding disc, especially devised for mounting on the agitating shaft of a cooled grinder for the predispersion of solids in liquids. The disc has a plurality of apertures therethrough, preferably three in number, which apertures have an inclined outlet edge. When a determined number of discs are mounted on an agitating shaft of a vat with counterpositioned orientation such that the inclinations of the outlet edges of successive discs are directed in opposing directions, opposing currents are created which notably improve the dispersion of solids in liquids.

Abstract: In an explosive charge setting gun used for driving fastening elements into a hard target material, caseless charges are positioned in a magazine duct and are separated by spacers. A movable element in the gun picks up a caseless charge from the magazine and moves it into position to be fired. The movable member includes an ejector which displaces the spacer following the charge, from the magazine. The movable element can be a slidable barrel or a separate slide member. The ejector can be formed as recesses or cams on the movable element. The spacers are shaped so that they are not picked up by the movable element when a charge is moved into the firing position.

Abstract: In an explosive charge driven setting gun having an axially displaceable barrel and using caseless propellant charges for driving fastening elements into a hard receiving material, the firing chamber in the gun is movable between a charge loading position, a firing position and an ejecting position. The firing chamber can be formed in the barrel so that it is movable with the barrel, or it can be positioned in a separate member rotatable about an axis parallel to the axis of the barrel. An ejecting member is associated with the barrel and is displaceable through the firing chamber when it is in the ejecting position for clearing the chamber of any unfired charges or of the residue of fired charges.

Abstract: A hand-held driver tool is disclosed for holding and aligning the axis of elongated fastener with another axis such as the axis of the tool or such as an axis through a pair of apertures in upper and lower belt fastener plates and an aperture in an underlying anvil support means. The preferred driver tool comprises a housing means with an elongated bore within one end of which there is received an expandable chuck means and within the other end of which there is slidably received a driver means. An elongated fastener such as a rivet-nail is inserted within the bore and into the chuck for being driven into a piece such as a belt upon an impact force being applied to the driver. A cone-shaped end on the lower end of the tool is inserted into a cavity in the belt fastener and a cooperating flange abuts the belt fastener to align coaxially the apertures and the axis of the elongated rivet-nail assembly.

Abstract: Metal flake is formed by charging metal particles, liquid and milling material to a ball mill. Metal flake formed, liquid and milling material are removed from the mill at a rate commensurate with the charging rate. The flake is then separated from the milling material.

Abstract: A novel ball mill providing a maximum efficiency for the balls dropping onto the material to be crushed, this being obtained by associating a vertical tube into which said material is poured together with the ball with means for raising the balls and crushed material passing out of the lower end of the tube, so as to reintroduce same into the upper end of the latter, the sufficiently crushed material being sucked out of the tube at a selected point of its height.

Abstract: A comminution device in which a crushing mass having an outer surface of helical configuration is mounted on a rotary support which rolls the crushing mass around the interior surface of a crushing chamber. The helical surface provides improved comminution. The rotary support is a flexible wire rope which permits limited radial movement of the crushing mass, allowing centrifugal force to aid the comminution. The crushing mass is mounted at about the midpoint of the wire rope, allowing gyroscopic forces to further assist the comminution.

Abstract: In an explosive charge driven setting gun for inserting fastening elements into a hard receiving material, caseless charges are positioned in an opening in a holding member prior to being inserted into the firing chamber. A feed member in the gun displaces the charges from the holding member opening into the firing chamber and a plunger located on the opposite side of the firing chamber from the feed member is movable through the chamber for clearing an unfired charge or any residue of a fired charge. The holding member can be a magazine or a separate slide movably mounted in the gun housing. Preferably, the opening in the holding member, the feed member, the plunger and the firing chamber all have the same cross sectional shape viewed transversely of the firing direction of the gun.

Abstract: A fluid conduit assembly is provided and comprises a first and second conduit adapted to be easily connected and disconnected, a first electrical connector device carried by the first conduit and a second electrical connector device carried by the second conduit, and means locking the devices together with the first and second conduits connected with the locking means assuring electrical continuity through the electrical devices even upon exerting forces tending to pull the conduits apart.

Abstract: The present invention relates to a grinding mill system including a ball mill, rod mill, or the like, the system being characterized by an improved, simple and highly effective proportioning feed device for automatically optimizing through-put under any of a series of differing operating conditions. The system automatically proportions raw material to be ground with partially ground but oversize materials in an efficient manner without the use of complex and expensive electronic and like sensing devices and circuits.

Abstract: Window shade hanging apparatus includes a guide block formed of a synthetic plastics material and an elongated rod dimensioned to fit slidably within a through longitudinal bore in the block. The guide block has a vertical recess or channel in one end and a permanent magnet is mounted in the block and has an exposed face within the recess. The elongated rod has a permanent magnet affixed to one end whereby a support bracket for a window shade can be held within the recess of the block by its magnet and aligned with a vertical element of the window frame and a fastening element for the support bracket is held by the magnet on the elongated rod in position to be driven into an aperture in the support bracket and into the vertical window frame element for securement thereto.

Abstract: The teeth of the stator and rotor of the refiner are each formed with a surface layer on the leading flanks which is harder than the end faces so as to maintain a sharp cutting edge. The hardness of the surface layer is at least 600 HB while the end face is of a hardness of from 280 to 320 HB.

Abstract: The mixing apparatus comprises a mixing container with vertical axis which mixing container comprises an interior space and an outer annular space, communicated with the interior space by an annular gap. Within the interior space, there is performed a size reduction of the material to be mixed into granulated material which enters the outer annular space through the annular gap. The annular gap has comb-like openings so that only parts of small size are allowed to pass through.

Abstract: Method of and apparatus for reducing material by grinding and for handling the ground product in a system that minimizes the production of a product containing a high percentage of extreme fines so that the product is more uniform in size and the apparatus is more efficient in producing that product.

Abstract: A shredder for reducing scrap materials such as scrapped automobiles to pieces of a smaller size includes a shredder housing having an inlet and an outlet, rotary hammer means positioned in said housing, cutter means, means for rotating said hammer means to coact with said cutter means to reduce the material to smaller pieces, and an improved discharge grate positioned across said outlet through which such pieces must pass to leave the housing, said improved discharge grate comprising a plurality of grate segments secured within a frame which can be readily opened and reclosed so that a grate segment can be replaced. In a preferred embodiment, the outlet and the grate are located in the end wall of said housing about 180.degree. from the inlet.