Abstract: A sewing machine has an electronic control for the production of at least one stitch pattern consisting of a plurality of different single stitches, with a read-and-write memory RAM for storing in memory at least the single stitches of the stitch pattern and with a feed mechanism whose feed adjustment occurs by a step motor controlled in accordance with the stored data of the read-and-write memory within the inactive phase of the feed mechanism. To carry out a feed variation exceeding the maximum number of steps of the step motor between two predetermined sewing stitches, the control unit contains a comparator which compares the magnitude of the displacement amount of the step motor before the next displacing movement is carried out with a given maximum displacement amount, in order to prevent a stitch formation between the point of insertion of the previous stitch and the desired point of insertion of the next following stitch when the maximum displacement amount is exceded.

Abstract: In an electronic musical instrument which generates a musical waveform by calculating the waveform amplitude value at each sample point through Fourier synthesis, temporal variations of the musical waveform and its timbre variations in accordance with a touch response are controlled with respect to readout addresses for reading out a set of harmonic coefficient data for the Fourier synthesis from a memory having stored therein a plurality of sets of such harmonic coefficient data, thereby changing the component ratio of a harmonic coefficient which will ultimately be used as a Fourier coefficient.

Abstract: In an electronic musical instrument which generates a musical waveform by calculating the waveform amplitude value at each sample point through Fourier synthesis, note-range variations of the musical waveform and its timbre variations in accordance with a touch response are controlled with respect to readout addresses for reading out a set of harmonic coefficient data for the Fourier synthesis from a memory having stored therein a plurality of sets of such harmonic coefficient data, thereby changing the component ratio of a harmonic coefficient which will ultimately be used as a Fourier coefficient.

Abstract: To lower ground water in the region of foundation bodies, such as foundation piles and the like, a water-pervious layer of filtering concrete, in particular of uniform-grained concrete, is arranged below an upper water-impervious part which is made of standard concrete. From this layer the entering ground water is sucked through a pipe which extends through the foundation body and is designed as a water-pervious filter pipe in the region of the layer of filtering concrete. The layer of filtering concrete is preferably reinforced by reinforcing irons. After lowering of the ground water level, the filtering concrete is injected with a hardenable injection material, thus enabling the lower end of the foundation body to better absorb the pressures transmitted from the upper part.

Abstract: Workpieces of unequal configuration are to be treated within an assembly line. For this purpose, suitable clamping frames are provided to hold the workpieces. These are moved about a common axis which extends laterally above an assembly line direction. While the upper edge of each individual clamping frame is hinged to an element which is rotatable about the axis, the lower edge is guided in a fixed guideway toward a working position. A common guideway length of two fixed guideways is movable into the working position transversely to the assembly line direction.

Abstract: A checker for air conditioner with a pressure gauge, which comprises an auxiliary dial plate placed on the pressure gauge panel rotatable coaxially therewith. The auxiliary dial plate has an indicator zone and a temperature correction graduation arranged in such a manner, that the existing stand of charge of the coolant is indicated by the pressure gauge needle directly on the indicator zone, when the ambient temperature is set on the temperature correction graduation at a reference mark disposed on the gauge panel adjacent the temperature correction graduation.

Abstract: A method of determining the temperature, preferably the ice boundary temperature, of an electrical resistive heating element of a de-icing system for airplanes, helicopters, and the like, preferably for a fully automatic control of the heating times of the heating elements. Additional temperature sensors are avoided and circuitry costs are substantially reduced by using the resistive heating elements themselves for determining the temperature. The resistance variation due to temperature variations of an element is ascertained by a current-voltage measurement, and a temperature variation of the element is determined from the resistance variation while using the temperature coefficient. The current-voltage measurement may be based on Ohm's law with a following analog or digital processing of the signal.

Abstract: A ventilation system with positive and negative ventilation pressures controllable through a control unit is to be improved with respect to its adaptability, in particular in the generation of high pulse repetition frequencies above the natural breathing frequency. A gas transport element is provided in connection with a ring line which contains an inhalation valve in an inspiration branch and an exhalation valve in an expiration branch. The desired improvement is obtained by the fact that the gas transport element is arranged in the ring line with constant direction of delivery. By alternate control of the inhalation valve and exhalation valve in a closed system inspiration and expiration pulses are produced. In addition, a controllable valve unit is indicated in which the inhalation valve and the exhalation valve are actuated as diaphragm valves by combined injector and ejector units of low inertia.

Abstract: An accident data recorder for short-time recordation and storage of data and events relating to an accident of motor vehicles, comprising pickups for sensing, for example, wheel revolutions to determine the travelled distance and speed of the vehicle. In addition to these wheel sensors, capacitance-based acceleration sensors are provided whose output signals along with the output signals of the wheel sensors and with other status data relating to the operation of the vehicle, are continuously recorded at storage locations of a fixed storage. For this purpose, an addressing logic is provided which operates in a closed counting loop and, as soon as a final address is reached, jumps back to the starting address to overwrite the initially stored data. This cyclic data storage is interrupted by the occurrence of a trigger event defining an accident, with the result that the last recorded data, including a predetermined after-travel time, are freezed.

Abstract: Disclosed herein is a magnetic recording medium, (1) in which a magnetic layer is formed by coating a magnetic paint containing a magnetic powder and a binder as its main components on a non-magnetic base material; (2) which is featured by containing as said binder a polymer having an alkenyl phenol as one of the components of the polymer; and (3) which has markedly improved effects in the dispersibility of the magnetic powder in said medium and in the abrasion resistance and flexibility of the magnetic layer.

Abstract: The known built-in ironing boards are disposed on a pull-out which is movably mounted in ways so it can be swung via parallelogram guide arm pairs from a lower position at rest into an upper working position. When ironing on such an ironing board, the pull-out must be pulled out first, whereupon the ironing board must be brought into the working position and locked therein. To facilitate handling, there is now provided a naturally flexible member in the form of a flexible connector such as a wire rope which is effective only when the pull-out is extended, in which position it connects the ways, or a part fixed thereto, to the ironing board. Shortly before the end of the pull-out motion of the pull-out, the ironing board is retained by the wire rope so that the parallelogram guide arm pair pivots upwardly, bringing the ironing board into its working position without requiring additional manipulations to accomplish this.

Abstract: A control panel for a tape recorder includes wind and rewind buttons, recording button, a playback button and a stop button. On actuation of the recording button or of the playback button, the respective tape position is automatically stored in a main memory. Under the stop button a location button is arranged. On actuation of the location button the magnetic tape is stopped, the tape location stored in the memory is read, and the tape rewound to this tape location. On a simultaneous actuation of the locations button and of the stop button, the tape is stopped and rewound to the tape location "zero". On simultaneous actuation of the location button and of the playback button, the tape is stopped, the tape location stored in the memory is read, the tape is rewound to this tape location, and in automatic repeat played back between this tape location and the stopped location.

Abstract: In a Y circulator, the ferrite body is so dimensioned that at the operating frequency, not the dominant mode, but two higher order modes are excited having their frequencies close to each other.

Abstract: A solenoid valve has a valve body having a first driving fluid connection. On the valve body a rocking part is pivotally mounted which has a second driving fluid connection. In the valve body a valve cartridge is placed functioning as a 3/2 way valve controlling the flow path between the first and second fluid connections. The solenoid valve may be fitted with a venting muffler and chokes upstream and/or downstream therefrom.

Abstract: A planer drive includes a sprocket wheel for a planing chain, the sprocket wheel having a secondary chain ring, and a driveshaft has a primary chain ring. On at last two circles juxtaposed at a predetermined distance, the primary chain ring has radial holes for clutch pins, conical friction segments attached to the clutch pins forming two revolving friction rings whose outside flanks work against an annular groove of the secondary chain ring. Between the two friction rings on the primary side, the secondary chain ring has a centrally engaging friction ring of appropriate taper which works against the inner flanks of the friction rings on the secondary side. The friction ring on the secondary side is mounted so as to be axially movable so that uniform engagement, reduced wear due to low specific contact pressure and better heat dissipation are assured while emergency operating properties are maintained.

Abstract: Pt catalyst on a substrate provides an air purification particularly for carbon oxide contained in the inhaled air is caused to react with air oxygen on the surface of carbon oxide catalysts and thus removed. But it is desirable for many air filter applications to eliminate, in addition to CO, other harmful gases from the air also. The Pt catalyst used as gaskmask filter material offers, particularly, but little protection additionally against acid gases. Due to an additional impregnation with the oxides of amine-forming heavy metals, the separating powers for acid gases is increased extraordinarily without reducing the capability of the Pt catalyst to oxidize CO catalytically. There even results an intensification of the respective effectiveness.

Abstract: The invention concerns an electrical device having a modular configuration which permits the assembly thereof with other electrical accessories, such as switches, outlets and the like, within receptacles common thereto or within outlet boxes or wall plates. This device, which may be, for instance, a flashlight with a rechargeable battery incorporated therein, rechargeable by means of the electrical network, is removable from the receptacle or outlet box so as to render it portable and utilizable also independently of the other electrical accessories.

Abstract: A bioreactor arrangement comprises a housing defining a closed space having a longitudinal axis with at least two spaced apart microporous membranes fixed therein dividing the space into a first chamber on one side of one of the membrane, a second chamber on one side of the other membrane, and a third chamber between opposite sides of the one and other membrane. The housing includes at least one port communicating with each chamber and fixed static mixers in the form of curved and/or perforated members in the third chamber. The first and second chambers are used alternately to receive and discharge material in the bioreactor. The third chamber contains an active substance which produces a useful product from raw materials in the supplied fluid. A flow valve and pump are provided for selectively supplying fluid carrying raw material to one or the other of the first and second chambers.

Abstract: A copying machine in which a reading element array consisting of a plurality of reading elements arranged at equal spacings in a straight line and a printing element array consisting of a plurality of printing elements arranged at equal spacings in a straight line are caused to reciprocate, a relative movement between a subject copy and the reading element array is caused in the direction virtually normal to the reciprocating movement, and a copying paper sheet facing to the printing element array is caused to move is disclosed. The image information read by each reading element is fed to the corresponding printing element to reproduce characters or patterns on the subject copy on the copying paper sheet by means of the printing element array.

Abstract: In this house, at least some of its component parts in the opened out position constitute, when the house is in the folded up position, a stackable container which is closed, compact and homogeneous throughout its length, within which container are disposed, folded up, all the other elements of the house, and in particular means a ladder-grider ensuring the stability and the bracing of the unfolded house and the longitudinal bending strength of the container formed by the folded up house.