Abstract: The contact pole of a trolley bus carries at its normally upper end a trolley shoe and an upwardly projecting guide which may jointly pivot on the pole about an approximately vertical axis. When the pole is partly raised by a heavy spring and swung horizontally, the trolley shoe is vertically aligned with an overhead wire when the guide abuts against the wire. When the pole is further raised by the spring, the trolley shoe engages the wire, and the guide is automatically dropped below the trolley shoe so as not to collide with hangers for the overhead wire. When the pole is lowered by an operating mechanism against the biasing force of the spring, a motor-driven element of the mechanism connected to the guide by a motion transmitting train automatically returns the guide to its position above the trolley shoe.

Abstract: A body suitable for conductively connecting respective electrodes of closely coupled fuel cells arranged in series circuit and operating at temperatures of at least 600.degree. C. consists of two conductively bonded ceramic materials having electronic conductivities of at least one mho/cm at 1000.degree. C. at respective ambient partial oxygen pressures between 10.sup.-5 bar and one bar, and below 10.sup.-5 bar.

Abstract: A coating of a thermally hardened alloy of nickel and a nickel-phosphorus compound covers the internal face portions of a spinning pot which are engaged by the fibrous material being spun. The alloy produced from an electroless nickel plating solution is rolled to improve surface smoothness and density, and the rolled coating is heat treated to precipitate a portion of the phosphorus present in the form of a finely dispersed nickel-phosphorus compound. Silicon carbide may be dispersed in the coating to further increase its hardness.

Abstract: A compound cell for performing an electrochemical reaction at high temperature consists essentially of hollow, cylindrical bodies of a ceramic electrolyte, rings of an electronically conductive material coaxially interposed between each pair of electrolyte bodies, annular layers of ceramic insulating material bonding each ring to at least one of the two adjacent electrolyte bodies, the bodies, rings, and annular layers being diffusion welded to each other to form a cylindrical, gas-tight tube. A pair of electrode layers is associated with each electrolyte body, one layer of the pair covering the associated body inside the tube and conductively engaging one of the two adjacent rings, the other electrode layer of the pair covering the associated body outside the tube and conductively engaging the other adjacent ring.

Abstract: A solar collector panel absorbing incident solar energy at a high rate while radiating only a small portion of the absorbed energy comprises aluminum or an aluminum alloy as a continuous metallic substrate carrying an anodized oxide layer not substantially thicker than 1 .mu.. The exposed anodized surface is formed with a multiplicity of pores receiving nickel rods of microscopic dimensions which project from the oxide surface. When the pores are spaced apart 0.1 to 1 .mu. and have a diameter of 0.1 to 0.5 .mu., the nickel rods being dimensioned correspondingly, the panel has the desired properties.

Abstract: This invention relates to an improvement in a stepping motor, comprising a stator housing with electromagnets being annularly positioned therein, a flexible membrane rotatably mounted over said electromagnets on a bearing block shaft, said shaft being axially positioned within the stator housing, said membrane being a magnetically-conducting annular disc, adapted to act as a rotor, the improvement comprising race means whereby the membrane is prestressed on the side facing away from the electromagnets by pressing and its conically deformed by an amount coordinated to the step size and holding moment of the stepping motor, and including contact surface means corresponding with the race means on the one hand, and with the stator housing on the other hand, said surface means being equivalent at the upper side and the underside of the membrane.

Abstract: The telescoping elements of an extensible rod may be coupled sequentially to a coaxial, partly threaded spindle by respective internally threaded coupling members, each element being drivingly engaged with the spindle by a previously engaged, abuttingly coupled element. A yieldably resilient mounting for the coupling member or for one of two cooperating abutment members permits smooth engagement of the spindle threads with the coupling members.

Abstract: A bearing arrangement for the pot of a centrifugal yarn spinning unit has a housing in whose cavity a radial bearing and an axial thrust bearing for the shaft of the pot are arranged. The radial bearing is fixedly mounted on a carrier which plugs an opening of the housing. The carrier is sealed to the housing by O-rings, and the shaft journaled in the bearings is received in a passage of the carrier provided with a packing in fixed spatial relationship with the radial bearing. Wear of the packing is minimized by the permanent guidance provided to the shaft by the radial bearing although the shaft may oscillate radially with the carrier during its high-speed rotation.

Abstract: This invention relates to an improvement in a housing formation for a rotary piston machine of trochoidal construction with an outer envelope curve and a housing corresponding to said outer envelope curve, said piston being patterned after a turning point-free trochoid n:1, and working chambers between said housing and said piston separated by radial seals in said housing,The improvement comprising that the housing has the form of an outer parallel curve to the piston contour, whereby the equidistant distance of said parallel curve corresponds at least to the greatest deviation between said piston contour and the coordinated exact outer envelope curve.

Abstract: This invention relates to an improvement in a drive for a high-speed axle or shaft or a spindle in which a spinning can having a radially-extending wall is mounted at one end of a rotatable shaft, said can being positioned opposite a parallel housing wall with a gap between them, and in which the other end of said shaft is mounted in said housing in a spiral groove cap-type bearing,The improvement comprising direct-current drive motor means with electronic commutation, the stator ring with segment winding of said motor means being mounted in said wall of said housing,Permanent magnet means in said radially-extending wall of said spinning can, said magnet means being magnetized in the direction of the longitudinal shaft axis,And disc means connecting said magnets and being capable of transmitting the magnetic field pressure flow, whereby the magnetic field is closed.

Abstract: A shipping container of molded plastic in whose cavity a load is suspended between sets of three rubber straps diverging from the load toward respective rigid base members on the shell in angularly offset planes, the central strap of each set being less resilient than the two other straps. The straps impede transmission of mechanical shock from the shell to load, and their different resiliencies prevent build-up of load oscillations. The shell protects the load against harmful effects of the atmosphere.

Abstract: This invention relates to a vertically-flying aircraft adapted to fly while moored to a ground station comprising at least one rotor for producing vertical thrust, and a mechanically-acting storage mass for storing at least a substantial portion of the required drive energy for the drive of the rotor.

Abstract: This invention relates to an improvement in a rotary piston engine of trochoidal design, of the epitrochoidal or hypotrochoidal type with an outer envelope, with the piston surface and/or housing bore being equidistant to the mathematically exact trochoid, and including a follow-up drive, the improvement comprising that the minus-equidistant of the piston and/or of the housing bore has a value exceeding 10% of that of the generating radius and smaller that that for which the piston contour is tangent with the follow-up drive in the dead center positions.

Abstract: This invention relates to an improvement in an aircraft driven by a ducted fan and having a displaceable louver at the end of the flow channel for vertical flight, hovering flight, transition, and high-speed flight, the improvement comprising a vertical separating surface dividing the flow channel into two flow channels, and at least one vertical flap, pivotal about a vertical axis, mounted on the forward edge of said separating surface, whereby roll control may be effected.

Abstract: A heart stimulator adapted to be used outside the body comprising pressure wave generating means and coupling means adapted to be placed on the surface of the body in the area of the heart without an air gap.

Abstract: This invention relates to a process for manufacturing an axially symmetrical rotor adapted to rotate about the vertical axis thereof and having a length greater than the diameter thereof which comprises rolling a thin, high-strength steel sheet to form a cylinder having a longitudinally-extending joint,Welding said joint by electron beam welding,Solution-treating the blank thus formed,And bringing the blank to its final dimensions by means of the three-roll press rolling process wherein the blank mounted on a rotating pressure mandrel having a stop is pressed by pressure rollers moving toward the stop while the material of the blank flows counter-currently with respect thereto.

Abstract: This invention relates to an improvement in a rotary piston machine of trochoidal construction for transporting a fluid medium, having working chambers formed between a trochoidal piston and a housing corresponding to the coordinated outer envelope curve, said chambers being separated from each other by radial seals in the housing, wherein the medium is supplied through openings within the inner envelope curve in the housing side wall and in a recess in the piston and passes from the recess by way of control openings in the peripheral piston surface to the working chamber, and having outlet openings in the housing closed-off by check valves, the improvement comprisingA. the piston has the form of a saddle-free epitrochoid 1:1,B. the supply openings in the housing side wall are in the area of the radial seals,C.

Abstract: This invention relates to a process for producing helical oil grooves in a spherical metallic body, for example for a spiral groove bearing, which comprises exposing a photographic lacquer on the surface of said body to light under a pattern, developing the resulting image, and electrochemically etching and then chemically etching grooves in said body in the non-image areas, whereby pressure-building spiral grooves are produced having a planar groove bottom, straight walls, sharply right-angled edges, and a depth in the range of about 1 to 20 microns.

Abstract: A flow element for influencing flowing media including a bending-elastic exterior covering, a variable skeleton carrier in the covering, and a support between the exterior covering and the skeleton carrier, whereby movement of the latter is transmitted to the covering in the sense of a profile change.

Abstract: This invention relates to an apparatus for breaking-up, without contact, concrements present in the body of a living being, which comprises waveguide means filled with a liquid medium and adapted to be placed against said body, and means for generating shock waves within said waveguide means.