Abstract: In a circuit arrangement for a reversible electric motor for directly driving a windshield wiper the motor is operated at reduced rotational speed in predetermined angular ranges to ensure smooth starting and stopping in the reversing positions and an accurate parking position.

Abstract: A windshield wiper motor drive unit is described wherein a gear cover, connector receptacle and brush plate are integrally formed as a one piece plastic part.

Abstract: A digital circuit is described for the clocked suppression of changes in a multidigit, positive or negative digital signal which have signs opposite to those of signal changes at previous instants of a clock signal.

Abstract: In a television receiver, a circuit is provided which automatically controls the focus voltage of the picture tube. The circuit uses a sensor to obtain focusing information from the picture tube wherein this information is processed by an alignment computer and a digital to analog converter which controls a blocking oscillator circuit to provide a focusing voltage.

Abstract: A windshield wiper has its wiper blade, in the longitudinal direction, held and guided relative to the wiper arm in several places. This prevents any undesired transverse and longitudinal play during the wiping motion.

Abstract: An electric motor includes an end wall having a collector mounted therein. The brushes of the motor are affixed to spring levers resiliently mounted on the end wall. The end wall includes a diaphragm-like portion having a release pin extending radially inward. The spring lever with the affixed motor brush is maintained in a mounting position by contact with a holding pin. After the assembly of the collector between the brushes, the diaphragm is compressed to push the release pin into the lever. The lever is freed from contact with the holding pin and is released to allow the brush to contact the collector.

Abstract: An electrically programmable memory matrix comprises electrically programmable memory cells arranged in columns and rows, each consisting of a source-drain series arrangement of a memory transistor with a select transistor. The gate of the select transistor may be connected to one of row selecting lines of a row decoder, to which there are connected all gates of one row of the selected transistors of the memory cells of the same row. Control gates of groups of memory transistors (Ts) of one row may be connected to one common programming line, with these programming lines being connected by blocks via each time one group select transistor to one common block line which, via the source-drain line of a block select transistor whose gate is connected to one of a plurality of outputs of a block decoder is connected to one source of block signals.

Abstract: A memory cell includes a selection transistor and a memory transistor formed as insulated gate field effect transistors. The transistors are formed on a substrate with a channel for the selection transistor coupled to a channel for the memory transistor. A layer of oxide overlies both transistors. The channels are formed between a programming line and a reading line formed in the substrate. A thin film window in the oxide overlies a region of the programming line. An insulated, floating gate is formed overlying the window and the channel of the memory transistor. A gate electrode overlies the floating gate and the channel of the selection transistor.

Abstract: A digital filter for the digital luminance channel of a color-television set contains an even number of cascaded delay elements whose junctions as well as the input and the output of the cascade serve as taps. Each of the taps of the half on the input side is connected to an input of a first switch, and each of the taps of the half on the output side is connected to an input of a second switch, such that the two switches are simultaneously set to two taps which are symmetrical with respect to a center tap. The center tap is connected to the first input of a single multiplier, whose second input is fed with a signal corresponding to a constant, and whose output is coupled to the first input of an adder. The output of the first switch and that of the second switch are connected, respectively, to the second and third inputs of the adder, whose output is the output of the subnetwork. Digital filters with at least one such subnetwork can be used as peaking filters in the luminance channel of color-television sets.

Abstract: A windshield wiper unit has a slide which is supported so as to be movable in a longitudinal direction in a housing which is driven to and fro, and a wiper arm which is fastened with a fastening part to an end section of the slide. A low overall height is achieved by the fastening part having a recess with which it is placed on the end section of the slide in the longitudinal direction of the slide and by the end section being jammed in the recess.

Abstract: An integrated circuit is described which includes a digital/analog converter which together with a reference voltage generator and a current-to-voltage converter is driven by a single supply voltage. To obtain a variable output voltage from a second supply voltage, the reference voltage is dependent on this second voltage. The output voltage can be used as the tuning voltage of tuner diodes.

Abstract: A zone valve of the type using a heat motor includes a biasing spring that operates on a lever, the lever operating on a valve. The spring includes arms that slidingly engage the lever. The arms each include a bent portion adjacent the point of contact with the lever. By providing the bent portion on each arm, the effective biasing force produced on the lever is decreased when the lever is in a raised position.

Abstract: To increase the computing speed when forming the product of a first binary number (x) and a second binary number (y) and then adding (xy+z) a third binary number (z) by means of a multiplier (mw) and an adder (aw), the individual full-adder stages of the adder (aw) except the stage for the sign digit are inserted as an additional row between the next to the last row and the output row of the multiplier, the full-adder for the sign digit of the output row (az) being also omitted. The two omitted stages are replaced with a sign-correcting stage (vk).

Abstract: In a pulse generator with a rotor (7) provided with a conductive pattern and fixed contact springs wiping over the pattern, the latter is formed by a central continuous slip ring (15) which is concentric with the drive shaft (3) of the rotor (7) and has inwardly and outwardly projecting teeth (16; 17), the number of internal teeth (16) being equal to the number of external teeth (17), and the internal and external teeth having the same angular spacing (.alpha.).

Abstract: A storage unit for small components such as diodes or tantalum capacitors or the like as described. The storage unit is particularly suited for temporary storage of components between manufacturing steps and for storage from the factory to the user of the components. The unit comprises mainly of a coiled tubular body in which the components slide.

Abstract: An MOS high-speed overflow detector for algebraic adders which add two binary numbers (a,b) in two's complement notation and contain one full adder per digit which provides a sum signal (s) and a carry signal (c) consists of a complex gate (k) made up of three two-input AND elements (u1, u2, u3). The outputs of the three AND elements are NORed. The two inputs of the first AND element (u1) are fed with the sign signal (va) of the first binary number (a) and with the inverted sign signal (vb) of the second binary number (b), respectively. The two inputs of the second AND element (U2) are fed with the sign signal (vb) of the second binary number (b) and with the sum signal (vs) of the full adder (av) of the sign digit, respectively. The two inputs of the third AND element (u3) are fed with the inverted sum signal (vs) and the inverted sign signal (va) of the first binary number (a), respectively.

Abstract: A cathode-ray tube 10 with a deflection system 15 and an electron gun 14 having a magnetic ring 19 attached thereto is designed so that the magnetic ring 19 is not covered by the deflection system 15. To achieve this, the magnetic ring 19 is placed further to the back of the color-picture tube 10 than in conventional tubes, and/or the deflection system 15 is made shorter at the back. On an adjusting apparatus comprising both a magnetizing device and a deflection-system-positioning device, the magnetization of the magnetic ring and the positioning of the deflection system of such a tube 10 can be performed simultaneously and independent of each other. The measure can be taken on all tubes having a deflection system 15 and a magnetic ring 19 for adjusting the positions of at least two electron beams; in the case of color-picture tubes, color purity and static convergence are adjusted with such a ring.

Abstract: A windshield wiper assembly comprising two windshield wipers each driven by a separate motor is described in which a control provides switching signals for switching on and off the wiper motors so as to achieve relatively smooth running of the wipers. In particular wiping areas one motor is continuously switched on and only the other motor, in dependence on the difference of the angular positions of the two wipers, is controlled such that collision of the wipers is prevented when the wiping areas overlap.

Abstract: A digital filter serves to compensate for the reduction in the amplitude of the chrominance-subcarrier reference (fc) caused by the passband of the intermediate frequency stages, and thus to achieve a flat response in the filter's passband within the chrominance-channel bandwidth. The transfer function of the digital filter isY(z)/X(z)=T(z)=1/a+z.sup.-1 +z.sup.-2 /a,where a is a number presettable by the manufacturer of the color-television set but constant in operation.

Abstract: A color television receiver is provided having a fully digital color demodulator wherein the luminance signal and the chrominance signals are separated and digitally processed prior to being converted to analog signals.