Abstract: A DC arc furnace melt electrode is formed by a metal bar encased by a refractory encasement forming a passage containing the bar with the latter having an inner end and maintained molten by the melt and an outer end for an electrical connection and maintained solid by cooling. Granules of refractory having higher density than the melt and molten electrode end are submerged in this end to prevent or retard any flow of the molten metal, for the purpose of reducing convection heating of the molten electrode end by the melt in the furnace hearth.

Abstract: The forced-flow steam generator is provided with a control means for controlling the amount of water fed to the evaporator. The control means includes a controller which receives a load-dependent signal and an actual value signal from a temperature measuring means. The steam generator includes an injection line which communicates at a point downstream of the temperature measuring means. The controller may be connected directly to a valve in the injection line in order to regulate the amount of water which is bypassed around the evaporator or may be connected directly to the feedwater supply to maintain a constant flow to the evaporator during injection of water.

Abstract: The disclosure is directed to a rotary engine having an annular housing and a plurality of walls disposed around the interior of the housing with adjacent walls joined by rounded corners. A plurality of sliding pistons are disposed within the interior of the housing spaced apart from one another and connected radially to a drive shaft extending through the interior of the housing along the central axis thereof. The sliding pistons having face portions adapted to slide adjacent the inner surfaces of the walls are disposed radially outward of the drive shaft. End plates disposed at opposite sides of the housing and intersecting the central axis thereof enclose the opposite sides of each sliding piston which extend to adjacent the inner surfaces thereof. The sliding pistons are guided around the plurality of walls and rounded corners of the housing chamber by cams attached to the end plates.

Abstract: A method and apparatus for operating an internally timed switching regulator, in which a controllable switch is closed when the output voltage falls below a predetermined first set value and in which the controllable switch is opened when the output voltage exceeds a second set value in which an exponentially variable second set value is used in order to obtain at least approximately constant "on" or "off" time of the switch, to thereby keep the switching frequency constant regardless of changes of the input voltage, the load and the ambient temperature.

Abstract: A support element comprising a first resilient housing means, a second rigid housing means and means including choke means for connecting the interiors of the first and second housing means. In accordance with the invention, the interior of the first housing means is completely filled with silicone rubber and the interior of the second housing means is filled partially with such rubber and partially with a compressible medium. In further accord with the invention, the first housing means exhibits elasticity in an action direction and otherwise volume stiffness with respect to increases in internal pressure, while the second housing means exhibits volume stiffness with respect to increases in internal pressure.

Abstract: A process to create or modify adhesive properties between two materials without the use of any adhesive substance, characterized in that a solid surface belonging either to an intervening layer placed in contact with at least one of said materials or to at least one of said materials, is subjected to a friction created by means of a frictional tool.

Abstract: The invention relates to a method for the currentless catalytic precipitation of aluminum. The surface of insulating and conductive materials (substrates) to be aluminized is (1) catalyzed, while a film-forming moisture-insensitive layer is developed, with a compound active at the boundary surfaces, by a brief immersion in a dilute solution of (a) a modified ester or acylate of titanium, zirconium or vanadium, substituted at the metal atom with short- and long-chain organic radicals or (b), a chloride of the transition metals of the IV and V secondary group of the periodic system of the elements and a water-containing metal soap of a polyvalent metal, preferably aluminum soaps; (2) is intensively rinsed with aprotic solvents, preferably having a boiling point of over 100.degree. C.; and (3) is immersed in a 1 to 4% solution of trialkylaminalanes in a solvent mixture of aromatic and highly viscous aliphatic compounds. A homogeneous and strongly adhering aluminum coating is thereby obtained.

Abstract: A corrugated roofing sheet has special elevations formed in the wave crest of the sheet, the elevations being contoured to increase the sheet's rigidity while permitting the elevations to function as a ladder. The elevations provide effective rigidfying while leaving the valleys of the sheet corrugations free for drainage.

Abstract: A pole changeable three phase winding for a fractional pole pair ratio p.sub.1 :p.sub.2 = (3m .+-. 1)/3n with p.sub.2 = 3n being an integral multiple of the number of phases and m and n being positive integers.Each phase winding for the first number of poles 2p.sub.1 consists of 2p.sub.1 /t equal winding branches, of which a number G, divisible by three, of so-called base winding-branches carry current for the first number of poles 2p.sub.1 and for the second number of poles 2p.sub.2, where one third of each of the base winding branches, for the second number of poles 2p.sub.2, are assigned to all three phase windings. The remaining number N of winding branches are designed as zero branches which are ineffective for the second number of poles 2p.sub.2, so that a division into G base winding branches and N zero branches according to G + N = 2p.sub.1 /t takes place, where t is an integral divisor of 2p.sub.1.

Abstract: A pilot hole hinge and brad door installing apparatus is disclosed which facilitates door installation by the amateur or unskilled craftperson. Hinge plates used for installing doors in accordance with the invention include pilot holes which receive pilot brads to temporarily install a door in its opening after the companion plates of the hinge are permanently installed on either the door or door jamb. While so temporarily installed, a "trial before error" fitting of the door in its opening and accurate location of the companion plates of the hinge for permanent installation of the door is achieved. The door and hinge plate mortise and screw holes are accurately located and the probability of misalignment or destructive error is reduced.

Abstract: Personal dosimeter, which provides great ease in immediately obtaining reading results, includes a plastic tube, open on the bottom, and containing near its top, a well through the bottom of which is inserted a piece of inert wick and a cover made of a soft plastic placed over the top of the tube. When the dosimeter is to be put into use, a predetermined amount of liquid reagent is injected into the well formed near the top, which reactant moves by capillary action into the inert wick where it adsorbs, absorbs or reacts with a toxic substance to be measured by the dosimeter. After the required time period for measuring exposure, the dosimeter is turned over, additional reactant placed in the tube from the bottom and mixed with the reactant therein, the reactant then being used to determine the concentration of the toxic substance.

Abstract: The invention concerns a method for the preparation of additives for influencing the electrocrystalline growth in aprotic oxygen- and water-free organo-aluminum electrolyte media. A compound which contains a sulfonimide or sulfonamide group as the reactable group, preferably, N-benzoylbenzenesulfonimide, optionally in the presence of an inert organic solvent, is reacted with at least one organoaluminum compound of the general formula AlR.sub.3, where R is an alkyl radical, in the ratio of 1:1 to 1:6.The additives obtained furnish a bright aluminum coating on metals and conductive materials in direct electrodeposition.

Abstract: The negotiable document which may be used, e.g. by airlines includes a cover sheet provided with a hot spot carbon or other image transfer medium and at least one underlying sheet fully or partly coated with microcapsules of a dye intensifier and attractor. When information is imprinted on the cover sheet, the microcapsules of the dye intensifier in the underlying sheet are burst to wet the sheet and, thus, allow impregnation of the image transferred by the hot spot carbon into the fibers of the sheet. At the same time, the dye within the hot spot carbon is attracted into the sheet. The impregnation of the sheet is sufficient to prevent removal of the image from the underlying sheet without first destroying the sheet or mutilating it in such a manner that the defalcation effort is obvious.

Abstract: The fabric is woven with a reinforced warp strip between the background section and the selvage to allow spreading out of the fabric without using needle rollers in the background section. The reinforced warp strip may be formed with a permanent strip portion which remains with the background section and a removable reinforced strip portion which can be severed from the fabric.

Abstract: A small and simply operated recording apparatus employing an elastic pressure element is utilized to make a three dimensional recording in thin metallic foil from each of the two sides of a primary key from which a secondary key is to be manufactured, the recordings placed in an interpreting apparatus, which may be located remotely from the recording apparatus, which permits extraction of precise three dimensional data stored in the recordings whereafter the extracted data is utilized in key cutting apparatus to produce a secondary key, in all comprising a key making system.

Abstract: The apparatus is provided with a screening chamber filled with a radiation-screening liquid above the irradiation chamber in which a tubular radiation source carrier is mounted. The screening chamber is sealed off from the irradiation chamber while orifices are formed in the support member of the carrier to permit loading and unloading of the carrier with the radiation sources. These sources may be stored in a pit adjacent the irradiation chamber and submerged in the screening liquid.

Abstract: A fishing lure having a spoon-shaped blade with a first attachment location for a fishing line and a second attachment location spaced from the first location includes an offset tail in the form of an elongated stiff member having a first end firmly attached to the blade at the second attachment location and a second end carrying a loosely attached hook. The stiff member extends away from the blade in a direction such that the center of gravity of the member is offset with respect to an extension of a line between the first attachment point and the second attachment point. The offset tail causes the lure to trail through the water in a sinuous path with realistic short side-to-side darting motions. The stiff member may be made of wire, with beads of brass, or other material heavier than water, strung along the wire, preferably in order of increasing size from the first end to the second end.

Abstract: In a filling level measuring installation with a radioactive radiator, which can be rotated within a lead shield from a peripheral operating position opposite the measuring receiver into a central safety position, a second radiation detector is arranged on a rearward extension of the measuring path in such a manner that in the safety position, its distance from the radiator is smaller than in its operating position, so that the output signal of the second detector can serve for monitoring the radiator position.

Abstract: The disclosure relates to a machine which is adapted to fill a line of containers passing through a filling zone. The machine includes apparatus for delivering material to the containers which is arranged compactly yet is easily accessible for maintenance and cleaning. The material delivery apparatus includes a hopper located at the outlet end of the machine and an inclined endless belt conveyor extending upwardly from the hopper to a discharge location laterally spaced from and above the line of containers to be filled. The conveyor belt has flights which pick up portions of material from the hopper and deliver the portions to a shaker tray mounted for reciprocation offset and parallel to the line of containers. The shaker tray has a diagonal discharge edge for uniformly distributing an elongated flow of the material to a lower shaker tray mounted for reciprocation transversely to the line of containers.

Abstract: A printing machine comprises a rotary print drum adapted to receive type and a rotary transfer roller located adjacent to the drum for transferring ink from an ink supply to type mounted on the drum. A transfer drive couples the drum to the transfer roller so that rotation of the drum effects rotation of the roller, the transfer drive comprising roller means arranged to contact both an end surface of the drum and an end surface of the transfer roller.