Abstract: A beam (2) of collimated light is directed towards a printed circuit board (4). The light beam is displaced as reflected from a point of incidence in a path including surfaces having different heights above the printed circuit board when detected at an angle oblique to the surface. From the variation of displacement which is portional to height, the overall profile of the circuit board including components present thereon is determined along the path (56) or line (64) the beam is incident. Various photodetectors (14) are utilized and the addition of a ramp filter (58) enables a single cell integrating photodetector to provide an output intensity indicative of the displacement. An arrangement (FIG. 11) is presented for compensating for variations in surface reflectivity using normalization or feedback.

Abstract: A switching circuit includes two series-connected MOSFET (1, 6) complementing one another, which are interconnected at the drain terminal of each device. The gate terminal of the MOSFET that is grounded is connected to a control input terminal (E). This gate terminal is also connected to the source terminal of a depletion FET (7). The drain terminal of the depletion FET (7) is connected to the gate terminal of the second MOSFET (6) and, in turn, is connected via a resistor (8) to a voltage source (+U). The gate terminal of the depletion FET (7) is grounded. The load (5) is then connected to the drain side of the complementary MOSFET. When the switch is in a blocking condition, the cross current is thus prevented from flowing; and the FET connected to voltage can be completely activated.

Abstract: The invention relates to persistent screens where the image to be stored is stored in a layer (3) which contains as an active substance an illuminable luminophor (5) and which is tinted to increase the picture sharpness. The luminophor (5) is a rather small quantity of organic and/or inorganic UV luminophor material. In this connection, it has been found to be desirable to at least reduce the light loss caused by the tinting. To this end, the invention avoids dispersions of the scanning beam (14) in the persistence layer (3) during scanning by admixing to the luminophor (5) an UV luminophor (6) as well as an optical brightener (7). It has also been found appropriate to apply the persistence layer (3) on a substrate (2), such as a polyester foil, which is tinted with a substance that absorbs the light of the scanning beam (14) used for illuminating the layer (5). Such a screen utilizing the inventive principles is particularly useful in medical technology applications.

Abstract: An electrical surface acoustic wave filter with a wafershaped substrate (1) of monocrystalline, piezoelectric material, in particular lithium niobate, wherein one substrate side supports interdigital transducers (IW 1, IW 2) with metallic electrodes mutually engaging in comblike fashion for the stimulation and coupling out of the surface waves and with plastic and/or elastic damping compounds (10, 11) for the suppression of disturbing wave reflections. The damping compound (10, 11) is applied indirectly or directly to the substrate surface between the active interdigital transducer area "b" and the adjacent long substrate edges (4, 5) of at least one interdigital transducer (IW 1), and that at least in the inactive interdigital transducer areas (a, a).

Abstract: A surface wave filter (1, 11, 21, 31, 41) having a shielding structure (13, 23, 33, 43, 53) arranged between the inter-digital, asymmetrically operating structures (2, 3), which encompasses two such sub-structures (14, 24, 34, 44, 44a) and/or (15, 25, 35, 45, 35a), which are individually connected with the finger structures of the adjacent transducer structure (2 and/or 3) that are at reference ground potential.

Abstract: The relay has a flat armature (6) carried at one bearing edge (15) of a yoke arm (5a), which is attached via an armature retaining spring (8). In order to protect the armature against shocks, the exposed section (18) of the armature retaining spring (8) engages with one or several extensions (6a) of the armature. In the event of shocks occurring in the direction parallel to the coil axis, the armature is only able to move slightly and then it knocks against the terminal edges (16) of the exposed spring sections (18).

Abstract: A SAW device using a first reflector (13) and a second reflector (14) is arranged to provide compensation for temperature effects. The temperature effects are due to the anisotropic characteristics of piezoelectric material commonly used as the substrate and wave medium for the acoustic waves in the SAW devices. These materials typically exhibit a temperature dependent, preferential direction of transmission which if not compensated results in a temperature dependent signal attenuation. An additional technique using a non-reflective portion 22 offsets non-uniformity which occurs in the amplitude distribution of the reflected acoustic wave. Each reflector (13 and 14) may include its respective non-reflective portion (A.sub.1 and A.sub.2).

Abstract: A protection arrangement for industrial robotics and other applications reacts to torsion moments and pressure forces in addition to bending moments and traction forces acting upon the flange of the industrial robotics. In the protection arrangement, a protection flange (1) is pulled or held in compression against pins (6) arranged on a divided circle with the tie rod (2) by means of springs (3). On the left end of the tie rod (2) an activating element (10) has been arranged, pressed against a sliding member (12) and/or activating levers (17) by means of spring (11). Upon shifting the activating element (10), a switch (13) is activated for deactivating the industrial robots. This protection arrangement provides mechanical protection for the gripper in addition to the conventional fuse electrical protection for the activating drives.

Abstract: For the production of tin-graphite or respectively tin/lead-graphite layers, it is known to electrodeposit a tin or respectively tin/lead layer and to mechanically incorporate graphite in the boundary zone. In accordance with the method of the invention, the tin-graphite or tin/lead-graphite layer is produced electrolytically in a single operation, operating with an electroplating bath on a strongly acid basis in which graphite powder is dispersed by means of an acid-stable wetting agent, and at temperatures of up to 35.degree. C. In the respective electroplating bath the solution has a pH value equal to or less than 2 and contains in acid-stable wetting agent for graphite.

Abstract: From a heart sound signal input the occurrence of a first occurring heart sound is detected. Thereupon a predetermined heart sound enable window time is established, which for a first detection cycle is set to approximately the diastolic interval for the maximum heart rate to be detected. If a second heart sound occurs within this heart sound enable window time, this second heart sound is detected as a systole heart sound. The first heart sound may be detected as a diastole heart sound. If a second heart sound does not occur within the heart sound enable window time the procedure is repeated with increasing heart sound enable time as long as a second heart sound occurs within an increased heart sound enable window time. For diagnostics synchronization signals developed exclusively from the heart sound signals are used to validate data from diagnostic equipment such as a gamma camera.

Abstract: Disclosed are a method of detecting a magnetic preorientation in mechanical parts, such as motor rotors, and a device, utilizing this method, for the magnetization of tubular parts. The device includes a magnetization winding to accommodate the tubular part and an associated magnetizing apparatus. According to the invention, the part (100) is first magnetized near the surface by means of a recording head (300) in such a manner that discrete bar magnets (121 to 132) are formed on the surface between the preoriented zones in the circumferential direction, their lines of flux running between their poles in the preferred direction of the preoriented material, There originate in the preoriented pole zones outside stray fields of twice the number of poles used to position the part (100) during magnetization.

Abstract: An integrated injection logic (I.sup.2 L) semiconductor structure is disclosed which may be advantageously implemented in a group III-V compound semiconductor such as gallium arsenide. The base region of the lateral transistor is made extremely thin (less than one-tenth micron) by use of "regrowth" techniques. The structure of the vertical transistor is simplified by using a Schottky collector.

Abstract: High-frequency seal for casing coverings, for instance, electromagnetic interference suppressors, and for doors of chambers that are to be shielded from high frequencies, with an interference-suppressing sealing cord which contains at least two partially rolled up metallic meshes (10 and 15) in the form of strips, which are in contact with the surfaces to be sealed, the unrolled parts of which (12 and 18) lie one above the other and the rolled up parts of which (11 and 17) lie next to one another.

Abstract: An optical sender or detector device with an envelope (U) whose light entrance and/or light exit surfaces are adapted to provide a desired radiating or receiving characteristic that is to be able to radiate directionally in two or more spatial directions or respectively to receive directionally from two or more spatial directions. The light entrance and/or light exit surfaces having reflecting curves (R 1, R 2) and lenticular curves (L 1, L 2).

Abstract: A microprocessor has on-chip hardware for protecting software against unauthorized use. The microprocessor includes a decoder for deciphering software instruction codes prior to their execution by the microprocessor. The instruction codes are enciphered in a unique way so that they can only be executed by the specific microprocessor for which they are intended.

Abstract: A power FET is preceded by an input amplifier consisting of a second FET of the same channel type and a third FET of an opposite channel type. The FETs of the pre-amplifier can be integrated into the chip of the power FET without additional production steps if the power FET and the second FET are designed as vertical FETs and the third FET as a lateral FET. Through this semiconductor device, the relatively high input capacitance of power MISFETs, which results in slow switching speeds when driven by standard ICs, is overcome.

Abstract: A miniature hearing aid (1) includes a microphone (12), a receiver (14) an amplifier (15), and a battery connectable via a contact (18), all of which are contained in a housing (2,3). The amplifier is constructed of a printed circuit board (20) and a plurality of components (21). In order to save space, the components (21) are countersunk in openings (24) in the circuit board (20) to reduce the vertical dimension of the amplifier. The openings (24) are used as temporary supports and for exact positioning for the components (21) by making them rectangular with cut off edges.

Abstract: The invention relates to a power transistor with a semiconductor body. When shutting off a power transistor, local fusing of the semiconductor body may occur, if a characteristic power loss is exceeded for a certain period of time (second breakdown). This can be avoided, if the transistor includes a multiplicity of small partial transistors with very narrow emitter zones which are mutually paralleled via a ballast resistance each.

Abstract: An electrical suppressor filter is disclosed which has a filter housing, a circuit board arranged within the housing, electrical components electrically connected to the circuit board and power connection plugs extending through the housing wall and electrically connected to the circuit board. The power connection plugs have integral legs extending into the interior of the housing which are both mechanically and electrically connected to the circuit board.

Abstract: For the cooling of electronic assemblies or components which are accommodated in slide-in circuits disposed one above the other in a rack, cooling air is supplied to the individual slide-in circuits from the respective underside thereof, which after having been heated by the respective slide-in issues therefrom as warm air. On the rack underside and on at least one rack side and/or on the back of the rack a channel arrangement is provided which is connected with a cooling air supply system provided on the rack underside and which is in communication with the open undersides of all slide-ins for the uptake of cooling air.