Abstract: A method for filtering digital input signals (e) makes use of all-pass filters of a first-class having the transfer function S1 and all-pass filters of a second-class having the transfer function S2, as well as all-pass filters of higher order, derived therefrom, having the transfer functions S1' and S1" or S2' and S2". The all-pass filters (10 to 36) are arranged in several stages in such a manner that the number of all-pass filters of higher order for a predetermined filter function is reduced. The output signals (A1 to A8) of the all-pass filters of the lowest order (22 to 36) are combined in a logical operation stage to filter output signals (d1,d8), the respective filter characteristic of which is determined by the logical operation. By the method of this invention, the steps necessary for the filtering can be carried out faster than in the prior art.

Abstract: An electric power supply system with at least two mains (10, 12, 14) is indicated, whose outputs (16, 18, 20) are switched in parallel and who together supply a load (22). The output power of the respective mains (10, 12, 14) is governed by its temperature. In a special execution the output power of the respective mains (10, 12, 14, is regulated by the difference of its temperature and the mean temperature of all mains. This results in the fact that the mean time between two failures of the electric power supply system is increased by simple means.

Abstract: A method and apparatus are provided for adaptive equalization of distorted pulse signals with different pulse train speeds, particularly for bipolar signals. The edge time deviations of a signal derived from the pulses output from a variable equalization network are determined relative to a reference signal, and the results are used to selectively enable or disable individual circuit elements of the network in order to minimize the deviations. The circuit elements are controlled by a clocked binary counter, the counting direction of which is changed depending on the determined edge deviation change. The degree of equalization thusly achieved may be predetermined by presetting the count reading of the counter.

Abstract: Described is a process for producing information relative to the type of a printer head (18) present in a printer, which head contains at least one printer element (86, 88, 90). The servo component of the printing element (86, 88, 90) has an electrical resistance, which is determined via an electrical evaulation circuit. This resistance is assigned to one of several resistance ranges representing various types of printing head. Depending upon this completed assignment, the evaluation circuit produces a type signal (40a, 40b, 40c) as information. The type signal (40a, 40b, 40c) is made available to a subsequent control, whic can then supply the various types of printing heads (17, 18) with specifically suitable control signals. The invention can be used with practically all types of printing heads, whose printing elements are actuated by electrical or electromechanical servo components and therefore have an electrical resistance.

Abstract: A method of integrating one or more accessory function modules in telecommunication systems is disclosed, especially digital telephone extension systems, where communication between two user terminals is achieved using time division multiplexing by assigning a pair of time slots through a central exchange, and by preassigning at least one particular time slot which can be accessed to allow communication between the accesory function module or modules and the user terminals.

Abstract: A transport device for multiple layered web material consists of a transport roll and a pressure roll between which the web material passes. The pressure roll is in the form of a hollow prism mounted with play on a supporting shaft. The interior of the prism has rounded corners with a radius of curvature matching that of the shaft. During rotation of the pressure roll, the transport roll translates with the web material during some portions of its movement and rotates relative to the shaft during other portions of its movement.

Abstract: In an apparatus for receiving generally rectangular individual sheets and for storing the same in a container (14) in orderly condition, which container is arranged in a housing and has a throughput opening (34) connected with an input opening of the housing by a transport belt (18) for serially transporting the individual sheets, the throughput opening in at least the direction of one edge of the sheets is smaller than the corresponding measurement of the sheets. At the end of the transport belt (18, 24) a stacking apparatus (22) is arranged in front of the throughput opening and includes a stack support surface (30) for forming a stack of sheets, the sheets being arranged upright on the stack support surface (30) and parallel to the throughput opening (34). For inserting the sheets in the container (14) a pusher (48) is provided which is shiftable in the direction toward throughput opening.

Abstract: The present invention relates to a method and apparatus for the generation of voltage pulses for controlling the switching operation in switching power supplies. A voltage increase of a pulse generator is respectively started when reaching a first, lower threshold (A). Resetting of the voltage increase is carried out in free-running mode, when the voltage increase reaches a second (D) or a third (C) threshold lying between the first (A) and the second (D) one. In sync mode, the pulse edges occurring in the synchronization signal (V.sub.sync) effect resetting of the voltage increase. The advantages of the invention lie in the fact that the switching current, occurring at the change form free-running mode to sync mode due to the frequency difference, is minimized and that the generator operates reliably.

Abstract: The invention concerns the distribution of electric power to several functional units (10, 11, 12) with variable power consumption. A preset limit value (Pmax) of the total power supply which is lower than the sum of the highest possible individual powers (P10, P11, P12) is maintained. By evaluating the total power consumption (I) or the operating voltage (U) of all functional units (10, 11, 12), an increase in the supply current or a drop in operating voltage (U) is used to reduce the supply current (I3) of functional units(12) of a lower importance is favor of the supply current of functional units (11) of a higher importance. This invention is used especially in electrical telephone subscriber's stations that are supplied over the subscriber's line.

Abstract: A circuit is described for recognition of two-tone compound signals of two frequency ranges (F1 to F4, F5 to F8) in telephone installations with a limited transmission band width. Band pass filters (11, 12) whose output signals are added up and weighted individually are provided in a number corresponding to the number of possible single tones. The weighted output signals are each compared with the output signal sum of one of two frequency ranges (F1 to F4, F5 to F8 ) in order to signal a valid single tone. To increase the certainty of speech, another summand (Su, So) that is derived from a summation of the output signals of at least two other band pass filters (13) whose mid-band frequencies (F9 to F11) are outside the two frequency ranges (F1 to F4, F5 to F8) is also sent to the summation circuit.

Abstract: A control system for the pressing force created on the draw-off roller system (24) in a single-feed mechanism for sheet material (16) is described. This pressing force has an optimum value when the time required for the respective draw-off operation is the minimum amount. For a corresponding regulation, a time measurement is performed with successive draw-off operations. The times thus determined are evaluated, and if they are found to be the same, the value of the pressing force reached following regulation of a drive that produces the pressing force is retained.

Abstract: A circuit arrangement is described for automatically monitoring several analog electric signals and for maintaining predetermined ranges of tolerances by successive comparison with reference values. Error alarm signals are produced and stored, dependent upon the comparison and timed (synchronized) simultaneously with the connection of the respective signals to be monitored to a comparator (20). Access is provided to a reference value storage (30) from which reference signals assigned to each single signal and ranges of tolerances defining reference values are timed and led to the comparator (20). The respective outlet (output) signal of the comparator (20) for producing similar error alarm signals to be stored is logically linked with an evaluating signals (ZB 0) indicating which of the two reference values lies at any time on the comparator (20).

Abstract: A device for correcting the free conductor ends of a conductor bundle has a support with parallel grooves for holding the ends in a parallel array, a vertically movable heated stamp for adhering or welding a strip of material to the exposed plastic jackets of the conductor ends on the support and a knife for cutting off the portions of the conductor ends extending beyond the connecting strip. The pressing stamp is mounted on a vertically movable carrier plate for vertical movement relative to the plate and is spring biased downwardly, and the knife is fixed to the carrier plate so that the pressing stamp engages and presses the connecting strip to the conductor jackets and the knife then serves the projecting conductor ends as a result of a single downward movement of the carrier plate.

Abstract: A voltage source with preset values of the source voltage and the internal resistance is simulated by a computing circuit (25, 26; 35, 36; 47) which calculates a reference parameter (S.sub.UO ; S.sub.IO) for a current or voltage regulator (20; 30; 40) that forms the output of the voltage source. The reference parameter (S.sub.UO ; S.sub.IO) corresponds to the output current (I.sub.O) or the output voltage (U.sub.O) and is obtained from a measured parameter (M.sub.UO ; M.sub.IO) and the input parameters (S.sub.U ; S.sub.R) which correspond to the values to be set. The measured parameter (M.sub.UO ; M.sub.IO) is derived from the output voltage (U.sub.O) or the output current (I.sub.O). When using this simulation circuit, separate high load resistors and mechanical switching contacts are unnecessary and the input parameters (S.sub.U ; S.sub.R) can be set with analog switches.

Abstract: A set of components for making furniture includes at least an elongated support section (102), connectable with at least one surface element (18) and/or at least one further support section, with such components providing a cable channel (104) extending along the support section (102).

Abstract: For a component produced using integrated technology for providing integrated circuits with at least one programmable matrix shaped connecting field formed on a substrate with line and column conductors which can be connected in the area of at least one part of their intersecting points by coupling elements, two activatable or two deactivatable coupling elements (42,44) with a direction of activity at an angle of 90.degree. to one another are assigned to each of at least one part of the intersection points within the connecting field.

Abstract: A logic array module, produced by integrated techniques for forming integrated circuits, encompasses a substrate on which are designed at least one linking field and outside of it active elements which serve for the input and output of signals and for expanding the scope of the linking field, and it is constructed of tracks (48, 56; 46, 54), arranged in the shape of columns and lines, which can be intercoupled on their crossing points (intersections) by activatable or deactivatable coupling elements (50, 58) that, depending on the status (state of connection) of a track, influence the status of a track that crosses the former so that logic linkages can be realized on the crossing track.

Abstract: In a dispensing device for sheet material that includes a draw-off device and a single feed device with at least one draw-off roll, several conveyor rolls (22) arranged side by side with some axial spacing and with mating rolls (24) that are axially offset and are radially adjustable with respect to the conveyor rolls (22), where the mating rolls (24) and at least one of the conveyor rolls (22) that can be driven in the same direction with the former are made of a hard material, a ring-shaped strip (44) made of an elastic deformable material is embedded in the peripheral surface of the conveyor roll (22) that is made of a hard material where the axial width of this ring is smaller than the axial width of the peripheral surface of the conveyor roll (22) and projects radially above the peripheral surface in the unloaded state.

Abstract: The invention relates to a switching power supply with a battery branch circuit provided for an emergency power supply, which can, similar to the primary circuit, be switched on in case of an emergency, by a switching transistor (13, 43). The battery branch circuit is connected in parallel with the secondary winding (7, 37) of transformer (4) and poled unidirectional with the current pulses which are induced in the secondary winding (7, 37) from the primary side during mains operation. The second switching transistor (13, 43) is switched on during the respective on-phase of the primary-side switching transistor (6), but, relative to this, is switched on later and switched off earlier.

Abstract: The invention relates to a device for displaying information on a reading unit for the blind. Instead of character fields arranged with certain spacings apart from one another for displaying Braille characters, the reading table is occupied by a dense matrix of character elements (4) with uniform line and column spacings. In the totality of character elements, certain character fields (6) are provided which serve for displaying the Braille characters. These are surrounded by other character elements which are not set in the displaying of Braille text, so that the Braille characters have the required spacing apart from one another. The whole reserve of character elements (4) is used for reproducing large-area graphics, large symbols, tables or the like. With a certain arrangement, described in detail, of the character elements, all of the information displayable on a viewing screen can be reproduced on the reading table, with the exception of reverse-brightness information and that displayed in colors.