Abstract: A universal occlusal matrix for application to the occlusal surface of a tooth having a central groove forming a V-shape in cross-section, the universal occlusal matrix being transparent to ultraviolet rays and to rays of the visible spectrum to permit rapid hardening by polymerization of the filling material and of a material which does not adhere to that of the said filing. The universal occlusal matrix has an elastic lamina having a central groove forming a V-shape in cross-section with first and second curved concave wings extending outward from the central groove. The elastic lamina extends away from the central groove sufficiently far to cover the occlusal surface of the various teeth to which it may be applied. The angle of the V-shape of the groove of the lamina is greater than the angle of the V-shape of the groove of the various teeth to which it may be applied.

Abstract: A dual ball valve assembly which includes a one piece tubular valve housing having box connections at each of a first end a second end. A first ball valve is positioned between a first valve seat and a second valve seat at one end. A second ball valve is positioned between a third valve seat and a fourth valve seat at the other end.

Abstract: A method of weather proofing an opening through which an electrical cord passes. The method involves modifying the electrical cord by the addition of an elongate resilient deformable truncated conical sealing element. The electrical cord extends through a longitudinal passage in the truncated conical sealing element. The truncated conical sealing element is received into the opening in interference fit relation to provide a weather seal. The truncated conical sealing element can be integrally moulded to form part of an electrical plug. The opening may be modified with trumpet bell form lips to further enhance the weather seal.

Abstract: A magnetic fender cover including a sheet form body with a plurality of magnets attached to the body. Each of the magnets have an attachment face used to magnetically attach the body to an object and an opposed face substantially opposed to the attachment face. The opposed face of each one of the plurality of magnets being in the same orientation. Flux concentrating shielding is overlaying the opposed face of each of the plurality of magnets, thereby reducing magnetic flux adjacent to the opposed face and increasing magnetic flux adjacent to the attachment face of each one of the plurality of magnets.

Abstract: A compaction mechanism uses cables to move a compaction plate within a compaction chamber of a garbage truck. Cable guide pulleys are positioned adjacent a first end and a second end of the compaction chamber. Each cable has a first end and a second end, both of which are secured to the compaction plate. A winch-like drive assembly is used to concurrently move the cables to pull the compaction plate. This compaction mechanism is better able to withstand uneven resistance on the compaction plate without twisting.

Abstract: An interlocking roofing system includes, in combination, a plurality of shingles and a plurality of interlock strips. Each of the plurality of shingles includes a planar rectangular body having a first face, a second face, and four sides. Horizontal rows of shingles are interlocked by interlocking a single zigzag reentrant edge on a third side adjacent the second face of one horizontal row of shingles with a double zigzag reentrant edge on a first side adjacent the first face of another horizontal row of shingles. Each of the plurality of interlock strips includes an elongate planar rectangular body having a first face, a second face, and four sides. Shingles are laid in parallel spaced relation with the fourth side of a first shingle adjacent the second side of a second shingle.

Abstract: A motor driven tiltable cargo deck includes a support frame having a pair of opposed sides, a first end and a second end. A first pair of sprockets are mounted to the opposed sides adjacent the first end of the support frame. A second pair of sprockets are mounted to the opposed sides adjacent the second end of the support frame. A pair of continuous chains are rotatably mounted between the first pair of sprockets and the second pair of sprockets. A deck is provided having a first end and a second end. The deck is supported by the support frame and slidably movable from a travel position in which the first end of the deck is adjacent the first end of the support frame to an unloading position in which the second end of the deck rests upon a groundsurface. A pair of linkage arms are provided having a first end and a second end. The first ends are pivotally mounted to the deck adjacent the first end.

Abstract: A heat exchanger of a hydrocarbon fuelled motor vehicle includes a tubular body having a first end, a second end, and fluid impervious sidewalls formed out of a single length of conduit wound in a spiral coil. Connections are provided at each of the first end and the second end of the tubular body for coupling the tubular body with an exhaust pipe.

Abstract: A road resurfacing device has a frame on which is mounted a ripper bar for ripping the road surface, to a controlled depth, and behind it a separator for separating coarse and fine material in the road surface such the coarse material is deposited on fine material. The frame is supported by rollers extending across the frame. The ripper bar has depending teeth in rows on both sides of the ripper bar and is rotatable so that either sets of teeth, which may be at different heights, rip the road surface. The separator is formed of ground turning discs mounted on angled shafts to direct material first to one side and then to the other. The ground turning discs rotate counter to the direction of movement of the frame. A method of resurfacing a gravel road includes ripping the surface of the gravel road to break up fine and coarse material near the surface of the gravel road; and separating coarse material from fine material such that coarse material is deposited on top of the fine material.

Abstract: A conical tree transplanter is formed of first and second pairs of opposed tapered blades loosely connected sequentially side by side to form a cone having a narrow end and a wide end. The first pair of opposed tapered blades is removable from the second pair of opposed tapered blades by movement in the direction from the narrow end towards the wide end of the cone and is supported by the second pair of opposed tapered blades against movement from the wide end to the narrow end of the cone. A connector is located on each of the tapered blades at the wide end of the cone for connection to a lifting apparatus.

Abstract: A method of placing a shelf in a storage compartment, consisting of the following described steps. Firstly, select a pair of shelf members having opposed ends. The distance between the opposed ends is substantially equal to the distance between interior sidewalls of the storage compartment. Secondly, select a pair of support members having opposed ends. The distance between the opposed ends corresponds to a desired shelf height. Thirdly, pivotally connect adjacent opposed ends of the shelf members and the support members to form a parallelogram frame. Fourthly, collapse the parallelogram frame to permit insertion into the storage compartment. Fifthly, bring the support members into engagement with the interior sidewalls of the storage compartment thereby orienting the shelf members perpendicular to the support members, with the interior sidewalls of the storage compartment providing lateral support.

Abstract: A method of producing micron sized sulphur granules involving the following described steps. Firstly, heating sulphur until the sulphur becomes molten. Secondly, tempering water and inducing movement of the water at velocity. Thirdly, injecting an unbroken stream of the molten sulphur under pressure into the heated water moving at velocity. An explosive dispersion of the molten sulphur into fine sulphur granules occurs, enhanced by shear forces exerted by the movement of the heated water at velocity. The described method is capable of producing spherical sulphur granules within a broad range of 70 microns to submicron sizes. In the preferred ranges, spherical sulphur granules of less than 10 microns are be obtained.

Abstract: A fish retainer for ice fishing includes a base and an elongate member depending from the base. The elongate member has a first end, a second end and a longitudinal axis. A fish retaining gate is asymmetrically mounted to the second end. The elongate member is mounted for rotation about the longitudinal axis. The rotation of the elongate member to a first rotational position positions the fish retaining gate in a non-obstructing position. The rotation of the elongate member to a second rotational position positions the fish retaining gate in an obstructing position. A spring urges the elongate member toward the second rotational position. A locking mechanism locks the elongate member in the first rotational position. Upon the locking mechanism being released, the elongate member is urged by the spring to the second rotational position in which the fish retaining gate is in the obstructing position.

Abstract: A motorcycle chassis having two axially aligned internally threaded pin receiving bushings secured in axially aligned passages extending through opposed sides of the motorcycle chassis;a swing arm having opposed ends in which are positioned bearings, the bearing having axially aligned pin receiving apertures;a pair of mounting pins, each of the mounting pins having a first end, a second end, and an externally threaded body, the externally threaded body being sized to mate with the internally threaded pin receiving bushings;a sleeve having a first end, a second end, an external diameter sized to fit within the passages of the motorcycle chassis and an internal diameter slightly larger than the external diameter of the body of the mounting pin, such that the sleeve slides over the mounting pin, the second end of the sleeve having a flange;threaded main body of each of the mounting pins being mated with the internally threaded pin receiving bushings in the motorcycle chassis until the first end of the mounting p

Abstract: A compact diversity antenna is presented consisting of two electrically isolated orthogonal loop conductors joined at a midpoint. This midpoint is also electrically attached to a vertical conductor which produces a third mode of operation electrically isolated from the first modes. The two horizontal conductors and the vertical conductor may be constructed to have various relationships with a ground plane of various shapes and sizes. Some of the possible feed arrangements for each of the antennas is presented as well as matching and tuning circuits. All three antenna elements are found to have relatively weak near electric and magnetic fields on the ground plane side of the antenna where the ground plane is small in extent. This feature provides for reduced radiation into the head and neck of the cellular phone user.

Abstract: A probe for use in time domain reflectometry includes a body having a conductive portion and an insulated portion. A conductive loop is provided having a first end and a second end. The first end is secured in the insulated portion of the body. The second end is secured in the conductive portion of the body, thereby shorting and grounding the conductive loop. An RF connector is provided for coupling the first end of the conductive loop to time domain reflectometry instrumentation.

Abstract: A valve for a two way hydraulic drilling jar which includes a hollow cylindrical member having an exterior surface, an interior surface, a first end and a second end. At least one spiral-form fluid bypass passage is positioned in each of the first end and the second end of the cylindrical member. The at least one spiral-form bypass passages has a first end communicating with the exterior surface and a second end communicating with the interior surface.

Abstract: A method of reinforcing threads. Firstly, provide a workpiece. Secondly, determine the position on the workpiece that a hole is to be drilled and into which threads are to be tapped. Thirdly, bore an opening in the workpiece which transversely intersects the hole. The opening must have a diameter which is greater that a diameter of the hole. Fourthly, insert an insert into the opening in interference fit relation. The insert is of a harder material than the workpiece. Fifthly, bore the hole through the workpiece and into the insert. Sixthly, tap threads in the hole, such that a portion of the threads are reinforced by virtue of being tapped into the harder material of the insert.

Abstract: A support for a garbage chute cleaning apparatus includes a cart having ground engaging wheels. Outrigger legs are provided for anchoring and providing lateral stability to the cart. A rotatably mounted reel is provided having a length of line mounted on the cart. Two telescopically extendible vertical support columns are mounted on the cart. A telescopically extendible horizontal cross-beam extends between the two vertical support columns. The horizontal cross-beam has a remote end with a line guide which receives line from the rotatably mounted reel. A Counterweight is mounted to the cart opposite the remote end of the horizontal cross-beam. This provides a counterbalance to a garbage chute cleaning apparatus supported from the line at the remote end of the horizontal cross-beam.