Abstract: A method of bonding powdered material to a surface comprising placing at least one layer of powdered material onto a support of ductile material, positioning a surface to be coated by the powdered material in facing spaced relation with the powdered material and placing an explosive charge on the support on the surface thereof opposite the powdered material. The explosive charge is then detonated to produce acceleration of the support and the powdered material thereon towards the surface to be coated to cause impact of the powdered material with the surface to be coated and welding thereof. The detonation of the explosive charge proceeds along the length of the charge to progressively bring the powdered material into impact contact with the surface to be coated. The speed of detonation of the explosive charge is less than the speed of sound in the powdered material or support.

Abstract: An electrified fence for fencing-in livestock and fencing-out wild animals has as electric conductors pliable multi-layer ribbons including an outer and an inner metal layer. The two metal layers are separated by insulation layers made of plastics material. The inner metal layer is covered on its outwardly facing side by an insulation layer. The outwardly facing side of the outer metal layer is light reflective and the outside of the cover layer for the second metal layer is dark-colored. The ribbons are detachably secured to fence poles and are chargeable with a high voltage.

Abstract: An electrical coupling cover where a first inner cover having first and second open ends is overlapped by a second outer cover also having first and second open ends. Two electrical wires having bare ends are inserted through the inner cover when in use and bent around onto the outer surface thereof where the second cover clamps the bare ends in place by sliding contact. After clamping, the covers are rotated in order to twist the bare ends together for electrical connection.

Abstract: A metal wall, such as that of a vessel, is provided with cladding which is welded to the metal wall such that an elongated space is formed between the weld seams. The elongated space allows for the testing of the weld seams for leakproofness by closing off one end of the space and injecting a gaseous medium, or the like, into the space and gauging whether or not the medium exits via the weld seams. A plate made of rubber, plastic or the like may also be used in welding the cladding to the metal wall, which plate covers the unconnected ends of the two cladding parts making up the cladding layer for the metal wall.

Abstract: Particles adhering to the internal surfaces of an object are removed by conveying an explosive gas or gas mixture to the chamber defined by the surfaces, and detonating the gas or mixture. The detonation loosens the adhering particles, which are then removed from the chamber. The invention has particular application to the removal of particles from the internal surfaces of a body having a plurality of outlets communicating with the chamber.

Abstract: The invention relates to a hose feeding winch intended for use in charging drill-holes with pulverulent or pumpable explosives through a hose inserted into each individual drill-hole. The winch comprises a drum rotatable about a central shaft, a drum cage enclosing said drum and rotatable about said central shaft, and a cradle supporting the central shaft and rotatable about a central axis on the platform of the truck. The drum has means forming a channel or path for the charging hose to be wound and unwound thereon in a single layer, and without displacement by sliding movement in radial or peripheral direction on the surface of the drum.

Abstract: A stained explosive composition in a water-gelatin base is made from oxidizing salts and at least one water-insoluble hydrocarbon which has dissolved therein a water-insoluble coloring material.

Abstract: The apparatus includes two clamping devices mounted for vertical reciprocation one above the other, and having registering central apertures through which a flexible tube is adapted to be advanced. Each clamp contains a flexible sleeve disposed to surround the tube and selectively to be pressed into gripping engagement with it by means of a fluid pressure medium. This medium is also used to reciprocate the clamps alternately toward and away from each other, with only one clamp at a time being actuated so that the tube is advanced (e.g. fed upwardly) first by one and the other of the clamps.

Abstract: A tubular fuse, which is supplied with an explosive gas, is formed so that as the explosive gas is detonated a turbulence will be created to aid in the propogation and continuance of the detonation. To achieve this turbulence, the inner circumferential surface of the tubular fuse is roughened at least along a portion of the length of the fuse. Alternatively, turbulence may be created by coating the inner circumferential surface of the fuse with a fine-grained powder.

Abstract: A detonator is positioned in the bore of, or adjacent to, a roll or coil of detonating cord, one end of which is attached to the detonator, which in turn is aligned with a shothole and with a flexible, tubular inserting device, which advances over one end of the detonator and forces it into the shothole, during which operation the cord unwinds and is drawn into the shothole at the outside of the tubular inserter. In one embodiment cylindrically-shaped coils of cord containing the detonators are fed, as needed, through a supply tube to a receptacle positioned in front of the shothole and in front of the forward end of the inserter. In another embodiment both primer caps and detonators, with cord attached, are rotatably indexible into registry with the inserting tube and a shothole.

Abstract: An explosive composition, fluid when formulated and gelling to a paste at a predetermined time is provided. The composition, which is particularly useful for blasting rocks and can be readily poured or pumped into drillholes, comprises an oxidant, a combustible, a gelling agent, water and a gelling promoter.

Abstract: An explosive is produced in a continuous process made up of three stages. The first stage is mixing the solid ingredients of the explosive and transporting it to a mixing station. The second stage is emulsifying nitroglycerine and transporting it to the mixing station where the nitroglycerine is separated from the water and combined with other liquid ingredients. The third stage is the mixing stage where the solid and liquid ingredients are mixed or kneaded and formed into suitably-sized explosive units. The mixing station is provided with a mixer having a pair of hoppers in which are deposited the liquid ingredients and the solid ingredients, and which empty into a housing having a pair of rotating mixing screws which mix the liquid and solid ingredients. The liquid ingredients never contact the bearings of the mixing screws. The ratio of liquid to solid ingredients of the explosive may be varied by varying the feeding rate of each.

Abstract: There is disclosed an electrified fence for blocking the passage of animals. This fence comprises a plurality of posts, at least one of which includes a power supply. One or more conductor wires are connected to the power supply and strung from post to post. Each of these conductor wires consists of a metal ribbon coated on both sides with insulation material but leaving exposed the lengthwise edges of the ribbon.

Abstract: A liquid composition comprising an emulsion of a vinyl plastic, an alkali acetate, an aluminum compound such as the fluoride, water glass, an alkali sulfate and an alkali thiosulfate is useful as a fire retarding agent for treating waste. Perchloric acid or alum may be added to the composition or may replace the alkali sulfate and alkali thiosulfate. If desired, kaolin and/or crushed pumice slag may also be added.

Abstract: There is disclosed a spot welding device for spot welding metal parts by explosive force. The device comprises two plugs tightly fitted into a rigid tubular member and so spaced and shaped that a transverse substantially conical space is formed between the two plugs. This space is filled with a suitable explosive material which can be exploded by a detonator activated when desired by an igniter. The explosive force generated upon detonation of the explosive material produces a generally annular spot weld when the device is placed with one of its ends upon metal parts to be welded.

Abstract: This invention relates to a method of charging drill holes for blasting, according to which method solid and liquid components of an explosive substantially each of them separately but simultaneously are blown or pumped, respectively, through its individual hose channel into the drill hole within which the components are intermixed as a result of the simultaneous pumping and blowing operations. The invention relates also to various recipes for preparation of explosives possessing properties especially fitted for the method in consideration. The invention also comprises an apparatus suited for carrying out the method.