Abstract: A spreading system for spreading cloth in flat, aligned and vertically arranged layers on a spreading table comprising a reciprocally driven spreading machine arranged on a spreading table, and a stationary supply of cloth arranged near one end of the spreading table for supplying cloth to the spreading machine. An overhead cloth support and delivery assembly cooperates with the spreading machine and the cloth supply to support and deliver cloth drawn from the cloth supply to the spreading machine. The support and delivery assembly is supported for movement which is synchronous with the movement of the spreading machine by guides arranged longitudinally of the spreading table. The system operates so that longitudinal movement of the spreading machine away from the cloth supply draws cloth from the supply over the support and delivery assembly and delivers it to the spreading machine which spreads it on the spreading table.

Abstract: An ignition control circuit for an internal combustion engine having at least two spark plugs and two coils to provide a spark upon de-energization of the coils. The circuit also includes an output circuit connected to the coils to regulate current flow to energize the coils and a driver circuit connected to the output circuit to control the voltage to the output circuit in response to an input signal to the driver circuit.

Abstract: A wall mounting plate assembly simplifies installation while providing positive securement with a substrate such as a wall, ceiling, floor, duct work or like substrates and is particularly suitable for low voltage electrical connection applications. A plug portion is receivable within a port provided in a face plate which includes a tubular extension. The tubular extension acts as a guide for accommodating movement of the plug from a nonsecuring position to an engaging or operative position. Preferably, a spring bias is created as the plug is forced into the face plate which serves to draw the face plate towards wall engaging arms which moved outwardly past the tubular extension as the plug is moved to the engaging position. The assembly allows more convenient porting of the wall or substrate and simplifies installation.

Abstract: A mounting plate for attachment to a wall or the like where a hole or aperture has been cut in the wall. The mounting plate comprises a generally planar base and a plurality of resilient fingers extending from one surface of the base. The fingers include a wall engaging surface facing the base to engage the back of the wall. The base has wall engaging contact areas spaced from the base and movable against a bias towards the base whereby the spacing between the wall engaging surfaces and the wall engaging contact areas is variable by movement of the wall engaging contact areas towards the base against the bias. The mounting plate in a preferred embodiment has anti-rotation means on the wall engaging contact areas to prevent movement of the mounting plate once attached to the wall.

Abstract: Copper is won from chalcopyrite ore (copper/iron sulphide) containing Cu(II) and Fe(III), which respectively prefer square planar and octahedral co-ordination. A vaporized tetradentate (square-planar) Schiff base reagent is passed through a fluidized bed of oxidatively roasted chalcopyrite, and ignores the iron but forms a (volatile) copper complex. This is blown to a decomposition chamber containing a hot probe on which the complex decomposes, leaving the desired copper on the probe and liberating the Schiff base reagent for recycling.

Abstract: A sculptured optical art form device and the method of making comprising a transparent block having a predetermined index of refraction to provide internal light reflection, said block having a cavity disposed in one wall, the cavity being shaped or carved as a symmetrical one-half of an object that is optically displayed as a whole object in the block. The transparent block may be constructed of an acrylic polymer or glass. The geometrical outside shape of the block is selected to provide an optical view through at least one wall to an observer such that light rays striking the wall having the cavity are internally reflected. The observer looking through the viewing wall will observe a complete, fully formed object optically created by the symmetrical one-half cavity formed in the block wall providing internal optical reflectance. In one embodiment, the object optically created by the cavity appears to be completely embedded in the center of the block.

Abstract: A valve for controlling fluid flow comprising a valve casing having a passage therethrough, an obturator disposed in the passage, and a stem extending through the casing into the passage, said stem secured to the obturator for pivotal movement therewith. A sealing strip is disposed in a groove in the passage, the sealing strip including: a sealing face for compressing, fluid-tight engagement with the obturator, a pair of oppositely disposed, spaced-apart side faces, each side face having a slot therein, each slot overlapping the other slot without interfering with the other slot, and a base extending between said side faces, the width of said base being greater than the width of either of the slots. Rotation of the obturator to block fluid flow through the passage forces the obturator into compressing engagement with the sealing face and distorts the slots.

Abstract: Dihydrotetrazolo [1,5-a] quinazolines having the formula: ##STR1## wherein (a) n is 0, X is oxygen, and R is optionally unsubstituted alkyl, alkenyl of at least 4 carbon atoms, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, amino or substituted aryl; or (b) n is 1 or 2, X is oxygen, R is hydrogen, or optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy or (c) n is 0, 1 or 2, X is sulphur, R is hydrogen, or optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy; or (d) n is 0, 1 or 2, X is NR.sub.2 where R.sub.2 is hydrogen, alkyl having 1 to 10 carbon atoms, benzyl or hydroxyalkyl, R is optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy; and salts thereof. These compounds demonstrate pesticidal activity.

Abstract: Pesticidal tetrazole derivatives having the formula: ##STR1## wherein n is 0, 1, 2, 3 or 4; R.sup.1 is OH, halogen, alkyl, alkoxy, alkylthio, alkylsulphonyl, NO.sub.2, NH.sub.2 (optionally substituted), acyl, aroyl, CN, carboxy or sulphonic-acid or -ester or -amide; R.sup.2 is hydrogen or optionally-substituted alkyl; R.sup.3 and R.sup.4 are hydrogen or optionally-substituted alkyl, aryl, cycloalkyl or acetyl but R.sup.4 is not aryl or cycloalkyl if R.sup.3 is one of these two groups; and salts thereof when R.sup.2 is hydrogen.

Abstract: Dihydrotetrazolo [1,5-a] quinazolines having the formula ##STR1## wherein (a) n is zero, X is oxygen, and R is optionally unsubstituted alkyl, alkenyl of at least 4 carbon atoms, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, amino or substituted aryl; or (b) n is 1 or 2, X is oxygen, R is hydrogen, or optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy or (c) n is zero, 1 or 2, X is sulphur, R is hydrogen, or optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy; or (d) n is 0, 1 or 2, X is NR.sub.2 where R.sub.2 is hydrogen, alkyl having 1 to 10 carbon atoms, benzyl or hydroxyalkyl, R is optionally-substituted alkyl, alkenyl, alkynyl, aryl, aralkyl, alkylthio, cycloalkyl, or amino, and R.sup.1 is hydroxy, halogen, nitro, alkyl or alkoxy; and salts thereof. These compounds demonstrate pesticidal activity.

Abstract: A portable, safety hull cover for a marine vessel or the like which may be quickly deployed from a vessel which has sustained hull damage that destroys the water-tight integrity of the hull which could cause the vessel to flood and ultimately sink. The saftety cover is a flexible, waterproof sheet of material sized and shaped for attachably conforming to the vessel bow, sides and keel, with the cover being readily connected to the bow by an attaching noose and deployed against the hull along the outside bottom of the vessel. The safety cover when deployed will prevent water from being received into the boat through a damaged hull section as long as the boat or vessel is moving, such as would be the case with the vessel trying to reach a safe harbor. The device has an auxiliary use to form an enclosure around the boat for cleaning the hull.