Abstract: An equipment for the continuous, pneumatic introduction of finely divided materials, in particular coal dust, into several consumption sites, in particular into the tuyeres of blast-furnaces is characterized by combining systems partly known in such manner, that a plurality of double-story vessels is preceded by a distribution system comprising a supply bin with metering conveyor scale and distribution bin. A pressure-resistant bucket-wheel distributor is mounted underneath every pressure-vessel, the buckets of said distributor is multiply subdivided transversely to the axis, and a pressure-pan provided with conveyor-gas hook-up and subdivided into mini-chambers corresponding to the bucket-wheel distributor is mounted underneath each bucket-wheel distributor, the conveyor lines to the consumption sites being connected to the pressure-pan.

Abstract: An apparatus for converting the rotational speed of a shaft, particularly of the driving shaft of a log propeller shaft into a proportional impulse frequency is provided with a rotary permanent magnet, means to couple it with the shaft, and at least one magnetically actuated switch positioned within the effective range of the permanent magnet, these electrical elements being arranged in a liquidproof housing of an improved construction simultaneously contributing to an optimum space saving arrangement of all parts involved.

Abstract: A valve means comprising a valve lever pivotably supported by a valve guide and having a valve disk at one end thereof, a flexible seal covering the supporting portion of the valve guide and supporting the valve lever, and a cam mechanism, said valve means being arranged to open and close the valve instantaneously by an extremely weak force by operating the valve lever by means of the cam mechanism.

Abstract: A single-phase stepper motor with a bipolar or multipolar permanent magnet rotor and a stator with two L-shaped stator parts. Each stator part is provided at one end with a pole shoe that has main poles and auxiliary poles. A bridge with windings connects the ends of thestator parts which do not have pole shoes. Magnetically saturable intermediate parts connect the stator parts at opposite sides of the pole shoes, whereby the stator parts and the intermediate parts form a single one-piece unit.

Abstract: An apparatus for continuously measuring the density of a liquid within prespecified limits, utilizing the law of refraction, particularly an apparatus for measuring the acid density of a motor vehicle storage battery for the purpose of determining its state of charge. The apparatus has an optical system with a photosensitive element and a light transmissive body with a measuring surface which is in contact with the liquid, and with a light source which illuminates the measuring surface.The light source has an illuminated surface with a non-directional transmission.The illuminated surface facing the measuring surface is spaced therefrom.The illuminating surface together with said measuring surface define an open container filled with the said liquid. A frosted glass disc illuminated by a lamp forms the illuminated surface.The optical system contains a convergent lens whose main plane, together with the measuring surface encloses a precisely defined acute angle.

Abstract: A mobile floor cleaning and polishing machine comprising a wheel-supported chassis having thereon a turntable rotatable about a normally vertical axis. The turntable supports abrasive-ejecting mechanism including a generally rectangular nozzle from which granular, pelleted or pulverous abrasive may be discharged at high velocity, downwardly against the floor or other surface to be cleaned. By adjusting the angle of the rectangular nozzle with respect to the direction of advance of the machine, the width of the area treated in a single pass of the machine, may be controlled as desired. Spent abrasive is automatically recovered, cleaned and stored for re-use. Means are disclosed for oscillating the ejector means back and forth relatively to the chassis, in the direction of travel of the machine.

Abstract: A circuit arrangement for monitoring interruptions in each of two closed-circuit loops, which loops are laid in at least one cable. One end of each loop is connected, with the optional interposition of circuit elements, to one pole of a voltage source, the other end of each loop being connected, via a resistance network, to the other pole of the voltage source. Potentials derived from points in the resistance networks are used to directly control an electronic switching element which changes its conductivity state in the event of any interruption in at least one loop. Interruptions in the respective loops lead to a corresponding rise or fall in potential of the respective network whereby the electronic switching element is actuated.

Abstract: A valve system for protection of the valve surface from abrasion and wear normally caused by the flow vertically therethrough of wear-causing materials, such as pulverized cement, sand, ashes, ground and stone dust, hydrated lime, zincoxide, zinc mixtures, aluminum oxide, perlite, sewage and other granulated or comminuted fluid materials in a dry or liquid state, often piped under considerable pressure differences, has an elongated vertical housing with a funnel on top, an annular seat with an orifice wider than that of the funnel beneath it, a bulbous valve for closing the seal from the side opposite of the funnel and protruding into the seat when closed, means of support of the valve pivotally attached to the valve and control means of the means of support, to swing the valve laterally in and out of sealing position with the seat.

Abstract: An indicating instrument, particularly adapted for use with watercraft, with a cup-shaped casing of plastic material. The casing holds a measuring instrument with a dial. The front end of the casing is shut by a window shield and enveloped by a front frame.

Abstract: The invention provides a kit of parts, and a procedure for welding together such parts, to provide a strong trailer hitch for cars. The components of the hitch are such that they can be welded together in various different configurations so as to fit the large majority of cars, station wagons, pickup trucks and vans manufactured in North America. One feature of the hitch is that the socket member which receives the ball assembly is welded into a central tubular member forming part of a cross member of the hitch, and is weldable within this tubular member in different positions to suit required positioning of the ball member.

Abstract: A light concentrator of paraxial rays emanating from at least one point source and/or of multidirectionally dispersed rays, employing at least two confocal warped shells generated by the revolution of a conic section, has in a preferred embodiment two truncated confocal paraboloids, an outer of a larger dimension and an inner of a smaller dimension, mounted about a common axis with their vertices in line on one side of the common focal point of their surfaces. The inner face of the outer shell and the outer face of the inner shell are developed at least over selected portions thereof as reflectors. The vertex of the outer shell has an exit orifice for the passing of a concentrated beam therethrough, said beam originating in unconcentrated form from an area spaced opposite from the open ends of the paraboloids.

Abstract: A thrust grate, particularly a cooling or fire grate having an essentially horizontal sequence of two sets of grate plates alternatingly fixed and reciprocating forward and backward in linear alignment and vertically spaced from each other. Each set of plates has a rear portion extending in the direction of movement of the movable grate plates, an at least partially upward slanting front portion, and an inclined front.The front end of each plate overlaps the rear end of each following plate. The front ends of the fixed and reciprocating plates, each, are provided with a lip or nose, respectively, to move the material deposited on the sloped portions thereof.The angle of the sloped portion of the fixed grate plates is different from that of the movable grate plates.The rear portion of the plates with the smaller angle is positioned on a higher level than the rear portion of the plates with the larger angle slope.

Abstract: A process of mass producing a plurality of wrapped, printed, hygienically molded chocolate cakes by advancing a continuously fed elongated plastic film strip in a sequence of steps in a plurality of spaced identical pattern areas, printing in each area, forming a mold with said areas in the bottom thereof followed by filling, cooling and sealing the filled mold.

Abstract: An apparatus for conveying elongated flexible material such as metal strips, wire and tubes by means of rotating shafts in a processing container holding a treatment-fluid for treatment of the material chemically, electrolytically, by pickling, deposition and similar processes, provides for the means of: coiling the material, imparting the coiled material the shape of a helix having a plurality of loops; causing at least a partial immersion of the loops of the helix in the treatment-fluid; advancing the helix in the said container at an advance speed; controlling the entry speeds of the helix relative to a predetermined speed withdrawal of the helix from the container.In a preferred and more efficient mode of treatment, the inlet speed of the helix exceeds the exit speed with a consequent slow and progressive increase of the length of the helix immersed in the treatment-fluid at a time in a first phase of the operation.

Abstract: A method for treating elongated flexible material such as metallic strips, wire and tubes in a processing container holding a treatment fluid for treatment of the material chemically, electrolytically, by pickling, deposition and similar processes, provides for the steps of: coiling the material; imparting the coiled material the shape of a helix having a plurality of loops; causing at least a partial immersion of the loops of the helix in the treatment fluid; advancing the helix in the said container at an advance speed; controlling the entry speeds of the helix relative to a predetermined speed withdrawal of the helix from the container.In a preferred and more efficient mode of treatment, the inlet speed of the helix exceeds the exit speed with a consequent slow and progressive increase of the length of the helix immersed in the treatment fluid at a time in a first phase of the operation.

Abstract: Spinal support, particularly for use in first aid treatment of victims of spinal injuries. The support is of the type of an inflatable bag to which the victim is secured to immobilize his or her spine during transportation to hospital or the like. The outer shell of the bag has longitudinal reinforcement ribs to facilitate the handling of the injured with the support attached.

Abstract: A cylinder wheel member having a plurality of cylinder cavities is in meshing engagement with a piston wheel member having a plurality of piston elements between which segment-like cavities are provided. The meshing engagement of said wheel members provides expanding and contracting working chambers in the cylinder cavities of said cylinder wheel member as well as in the segment-like cavities of said piston wheel member. A disc-like commutator valve rigidly connected to said piston wheel member has two types of through passages, the first type of which connects the working chambers in said cylinder cavities of the cylinder wheel member to fluid inlet and outlet means of a casing rotatably supporting said wheel members and the second type of which connects the working chambers both in said cylinder cavities of the cylinder wheel member and in the segment-like cavities of said piston wheel member to said inlet and outlet means for a fluid.

Abstract: A crank and drive mechanism for a raisable sliding top such as of a motor vehicle is provided with a crank arm, with a mechanism to permit a plurality of rotations to said crank arm for a complete extension and retraction of the top, including an end stop.Means are provided to permit, with a single operating member, the actuation of the top into sliding movements, closing movements, opening movements, locking it in a position established, maintaining the top in a locked position releasably without the necessity for additional parts and automatically indicating the closed and the open positions of the top.

Abstract: An automobile sliding roof structure in which a transparent sliding roof panel is associated with an independently retractable opaque canopy panel and where the vertical gap between the roof panel and the roof frame is covered by a U-shaped shutter, moving with the roof panel, but not pivoting with the latter, and by a transverse stationary shutter at the rear of the opening, while skirt portions extending downwardly from the roof panel frame close the gaps between the two shutter elements and the roof panel.