Abstract: A method is described of preparing a blend of direct-positive silver halide emulsions that has a pAg value of at least 8.35 from two or more direct-positive silver halide emulsions of different average grain-sizes comprising fogged silver halide grains and having pAg values below 8.35, without inducing physical ripening, by raising the pAg to the value of at least 8.35 before or after blending the emulsions, and providing at least one electron-accepting or halogen-conducting compound, at the surface of the fogged silver halide grains prior to raising the pAg to the value of at least 8.35.

Abstract: A process for the preparation of acylamido derivatives by reaction of a compound of the formula Z - N = C = O, wherein Z is an optionally substituted alkyl-, aryl- (preferably phenyl or naphthyl) or cycloalkyl or optionally substituted heterocyclic, preferably a penicillanic acid or a cephalosporanic acid nucleus, having carboxyl groups and an optionally present hydroxy group protected, with a carboxylic acid of the formula ##STR1## wherein Z.sup.1 is an optionally substituted hydrocarbon group, in the presence of a catalyst selected from the group consisting of substituted pyridines and their N-oxides, optionally substituted imidazoles or their N-oxides, optionally substituted benzimidazoles or their N-oxides, and optionally substituted imidazo [1,2-.alpha.] pyridines or their N-oxides.

Abstract: Converter circuit, in which a 50 or 60 cps a.c. voltage is converted into a d.c. voltage, the latter into an a.c. voltage of a higher frequency, e.g. 20-80 kilocycles, which is converted by way of one transformer into one or several separate d.c. voltages. The transformer comprises a divisible ferrite core; the primary winding and one or several secondary windings are placed on opposite core parts. Each secondary winding, together with a pertaining rectifying-, smoothing- and stabilizing -circuit and a limiting resistor is installed as an intrinsically safe power source on one print. Several prints of this kind may be placed on the secondary core part, one for each power source required. The electrical values of the circuit components are subject to certain specifications.

Abstract: A pump and pump system employs electromagnetic actuation during discrete, periodic time periods, imparting rapid strokes covering small distances. Each stroke is delineated by stop members at least one of which is of wedge-like form and is controllably shifted to vary the stroke.

Abstract: A metallic cable adapted to be used to advantage for reinforcing various types of elastomeric articles such as belts and motor vehicle tires has a core formed from two or more metallic filaments wound together into a helical shape without twisting one filament about the other whereby each core filament lies in line contact with at least one other core filament, the line of contact being parallel to the direction of the filament and a helically wound wrapping filament is disposed about the core filaments. The wrapping filament is helically wound at the same lay and hand as the core filaments and is positioned on the inside of the helix formed by the core filaments.

Abstract: Polymeric particles are homogeneously dispersed in aqueous medium by a process which comprises dissolving a water-insoluble film-forming polymer in a water-insoluble, ethylenically unsaturated monomer which is liquid at room temperature. The solution formed is dispersed by stirring in an aqueous solution of a hydrophilic colloid and of a dispersing agent, stirring being continued until a stable dispersing of polymer-in-monomer solution droplets having a diameter between 1 and 10 microns, preferably between 1 and 6 micron, in said aqueous solution is obtained. While continuously stirring the dispersion in the presence of a free-radical forming polymerization initiator, the dispersion is heated at the decomposition temperature of said polymerization initiator to effect polymerization of the water-insoluble, liquid monomer and to form an aqueous dispersion of solvent-free polymer particles.

Abstract: An electric broiler for hamburgers and the like has a supporting frame on which an endless bar conveyor is arranged to advance longitudinally with the conveyor upper run and the conveyor lower run in generally horizontal planes. A set of upper electric heating rods extends longitudinally and transversely of the frame above the upper run, and a set of lower electric heating rods extends horizontally and transversely of the frame below the lower run. Below the lower heating rods on the frame are longitudinally extending radiation baffle boxes generally rectangular in cross-section and arranged with their diagonals substantially vertical and spaced apart transversely to allow drippings to pass between them. There are radiation reflecting dihedral plates extending horizontally and longitudinally on the frame above the upper rods, the dihedral plates being supplemented by top plates supported by the dihedral plates but being largely spaced above the dihedral plates to provide dead air spaces.

Abstract: Process for open vulcanization of innertubes wherein the completed green tube with valve and valve stem installed is folded and arranged on a surface with rods from about 13 to about 25 mm in diameter inserted in the folded ends. Air amounting to from about 7.5% to about 12.5% of the nominal fully inflated volume of the tube is injected and the thus-arranged and partially-inflated tube is exposed to open air or open steam curing at a temperature in the range of from about 150.degree. to about 190.degree. C. The resulting tube has edges and end folds of increased radius of curvature minimizing subsequent fatigue or flex cracking in service.

Abstract: In a method for drawing at least one fraction of solid substance by suction from a heterogeneous stock of several solid substances, which are segregated according to granular size and/or specific weight by supplying a segregation fluid, for example water, into a segregation zone at a distance from a suction nozzle of a suction pipe held in the stock, a selected fraction of segregated solid substances together with the fluid being conducted away in the form of a suspension through the suction nozzle water is vigorously injected into a ground layer for washing out the soil so that a fraction of fine grains is picked up in a whirl and can thus be directly sucked off through the suction pipe. With this method it cannot be avoided that both fine and coarse grains are sucked up together by one and the same suction nozzle.

Abstract: A solar energy collecting system, which may be operated to provide usable energy throughout the year, comprises a plurality of rows of elongate radiant solar energy collecting panels, each having upper and lower edges, being mounted to form an angle to the horizon and to face the sun's position at solar noon. An elongate reflector, also having upper and lower edges, compliments each row of collector panels to reflect radiant solar energy to it. The upper edge of each row of collector panels is positioned adjacent the upper edge of a reflector to define a single, inverted, generally V-shaped peak. The lower edge of each collector which forms a part of one peak is spaced from the lower edge of the reflector which forms a part of an adjacent peak to define a valley. A walkway is constructed in each valley to provide access to both the reflectors and collector panels for drainage and maintenance.

Abstract: A liquid dispensing gun employing two interacting bores and pistons to maintain the liquid inlet and outlet of this gun stationary with respect to the gun during operation. The gun is attachable to a liquid reservoir and may employ either a nozzle to deliver a dosage of liquid into the throat of an animal or to inject a dosage via a needle.

Abstract: A method is described for preparing 4-monohalo-2-pyrazolin-5-ones wherein a tertiary organic phosphite is allowed to react with a 4,4-dihalo-2-pyrazolin-5-one and the 4-monohalopyrazole-5-enol phosphate ester formed is hydrolyzed.

Abstract: The edge knurling of a thermoplastic web must often be carried out at elevated pressure in order to ensure a sufficient knurling depth even after the web has been wound and unwound different times. The prior heating of the web margins permits knurling to be carried out at lower pressures but may adversely influence the crystallinity of a film and also requires an increased amount of energy.The heating of the knurling wheel or tool itself reduces such disadvantages.

Abstract: A pendulum clock which has its pendulum connected to a carrier member by means of a pendulum extension that is connected to the upper end section of the pendulum and is fixedly or detachably connected to a pendulum spring. The pendulum extension extends into a keeper fork which latter has connected thereto a connecting member with a fork-shaped end the legs of which straddle the pendulum extension below the pendulum spring.

Abstract: Reproduction camera provided with means for displacing the lens and the original table, which include signal devices that emit electrical signals respectively representing the positions occupied by the lens and by the original table. Each signal device consists of a cam-roll type decade counting unit with drive shaft, of which each roll consists of a cam wheel with ten cams, and each cam wheel cooperates with a rotating ten-step switch with digital output.

Abstract: Method and apparatus for detecting and recording breast cancer, in which the breast is exposed to X-rays, preferably in the so-called soft range, the transmitted beam of rays is scanned by means of a moving, strip-shaped screen and the image of the strip-shaped screen is picked up with a television pickup tube moving along with the screen, and is displayed on a monitor tube.

Abstract: A sugar cane harvester has a pair of contrarotatable base cutters with projecting blades to sever cane sticks from their roots. The base cutters are constructed to minimize the quantity of earth fed into the harvester with the crop. A large free area is provided between successive blades for earth and rocks to drop out, but each blade has a long exposed cutting edge to prevent cane sticks entering said area without being cut. The blades are mounted on a support member having a flat profile to minimize the paddling action of the base cutters on earth and rocks.

Abstract: A container for transporting bulk material either solid or liquid has a pallet and a sleeve having segments of its wall secured to the pallet and other segments of its wall folded inwardly to provide flaps. A tubular member having corrugated-paperboard or the like wall and a cross-section corresponding to that of the sleeve has one end thereof disposed in the sleeve and resting on the flaps. A plastic bag may be inserted in the container and is folded about its edges to overlap the flaps. A rigid disk such as a corrugated paperboard disk having a cross-section substantially equal to the cross-section of the sleeve is disposed in the bag adjacent its closed end with its peripheral edge under the flaps. When the bag is filled with material, it is expanded against the wall of the tubular member and the tubular member is pressed against the sleeve thereby securing the tubular member in the sleeve. A cup-shaped lid is slidably disposed over the open end of the tubular member to enclose the bag.

Abstract: A pipe having an annular ring of a foam plastic material on its outer surface and a covering layer of thermoplastic material on the outer surface of the foam plastic ring. An opening between two free ends of foam plastic layer ring lying opposite each other of adjoining pipes is closed by a connecting layer which cooperates sealingly with the covering layers. A ring of rigid material is positioned under the covering layer at the point where the connecting layer is clamped onto the covering layer.

Abstract: High-frequency waves transmitted by a rotating antenna array at a ground tion are intercepted by an airborne receiver for photoelectric evaluation by one or more discs whose light transmissivity, by translumination or reflection, varies periodically according to a sinusoidal law in one diametral direction while being constant in another diametral direction orthogonal thereto. The disc or discs are rotated at a speed corresponding to that of the transmitting antenna array, under the control of periodic synchronizing pulses, and are illuminated by a flux modulated by an electrical signal derived from the incoming wave, this signal containing a phase component dependent on two spatial coordinates such as elevational and azimuthal angles determining the relative position of the ground transmitter and the airborne receiver.