Abstract: An electromagnetic relay of the type having an insulative base (1) which supports an electromagnetic assembly (2, 3) and a contact assembly (6) separated by partition walls (14, 15) includes a multipurpose retaining spring (4). The retaining spring is adapted to mate with the longitudinal portion (24) of the magnetic yoke and includes a plurality of tabs (411, 412 and 413) that dig into the insulative base securing it and the magnetic yoke into position. The retaining spring includes a flexible extension (43) located near a free end (243) of the magnetic yoke. An armature (3) is pivotally mounted on the free end and retained into position by the flexible extension of the retaining spring.

Abstract: A device for releasably coupling an optical fiber to an optoelectronic component comprises a support (3) having a V-shaped groove (2) cut into it for holding an optical fiber. The fiber terminates with its end face opposite an optoelectronic component (1) fixed on the same support (3). The optical fiber is fixed in the groove (2) by means of spring force (5) which acts on holding elements (16,17) as well as plastic layers (15) that press the fiber into the groove (2).

Abstract: A process of making an integrated injection logic (I.sup.2 L) semiconductor structure is disclosed which is particularly advantageous for implementation in a group III-V compound semiconductor such as gallium arsenide. By use of "regrowth" techniques, the base region of the lateral transistor is made extremely thin (less than one-tenth micron). Utilization of a Schottky collector in a vertical transistor simplifies the structure.

Abstract: A relay includes a spool, or coil (3 and 4), and a yoke (5) next to the spool. In front of the spool, an armature (8) that activates a contact spring (16) is accomodated in a contact space positioned upstream in one of the free sides of the armature. The contact spring has an initial leg (16a) extending straight across the overall width of the relay and a U-shaped second leg (16b) mounted on the first. The free end of the U-shaped spring leg (16b) operates in conjunction with two reciprocal-contact elements (13 and 14). The generally Y shape results in a contact spring (16) with a maximum possible free length and hence a low spring constant, meaning a low relay-response output, while retaining the prescribed compact design.

Abstract: In a circuit for driving a MOSFET connected to a load on the source terminal, the MOSFET is configurated as a source follower that is driven by a voltage doubling circuit including two diodes (D1, D2) serially connected together. The drain terminal of the MOSFET is connected to the operating voltage source and its gate terminal to the voltage doubling circuit which includes a capacitor (C). One terminal of the capacitor is connected between the diodes and its other terminal is supplied with a clocked dc voltage. The first diode (D2) is formed by a lateral MOSFET, whose gate electrode is connected with the drain zone. The second diode is formed by a vertical bipolar transistor with low current gain. A resistor is located between the emitter zone and the source zone. This particular circuit geometry is readily suitable for realization in integrated form.

Abstract: A dice separation technique involves producing a depressed street pattern (14) on the front device processing major surface of a wafer (11) before thinning the wafer down to a desired thickness. After mounting the wafer (11) on a suitable carrier, it is thinned down and selectively metallized to from backside contacts. Semiconductor material is removed from the central regions of the streets (14). Exposed material damaged by the material removal is also removed to eliminate micro-cracking while producing dice (12 and 13) having straight and smooth orthogonal edges. The present technique is particularly suitable for working with brittle compound semiconductor material between die areas having FETs or MMICs embedded therein.

Abstract: A rack for the production of semi-finished and finished products features an arrangement wherein two different clearance heights are provided respectively for the insertion of a pin coil former or the storage of the finished coil in the rack. Guide rails (4, 5) are adapted to accept a planar cardboard strip (9) to reduce the clearance height for the insertion of the pin coil former (10). Removal of the cardboard strip (9) increases the clearance height so the rack may be used to store the finished coil (15).

Abstract: An improved power-switching relay especially designed for mounting on printed circuit boards together with a method for manufacturing such a relay. The relay includes a number of features designed to properly position the various relay components relative to one another and to help ensure that they remain in the proper position at all times. To this end, the relay includes a unitary bobbin (22) and stationary contact support header (33) together with means (64) for firmly retaining the stationary contacts (34, 36) and their terminals (63, 73) in place in the header. The relay also provides means to prevent rotation of the armature relative to the movable contact assembly (53, 54) and to prevent rotation of the coil assembly relative to the frame (35). According to a further aspect of the invention, the core and coil assembly is attached to the relay frame by extending the core through the coil assembly and press-fitting the core into an extruded hole (14) in the frame.

Abstract: An attenuation bead is disclosed with a tube (1) made of ferrite suitable for use as a chip component. The attenuation bead is equipped with frontal contact elements (2) which are electrically corrected with one another by conductor elements (4) in the interior of the tube. The operating range of interference suppression for the attenuation beads is in the short-wave and ultra short-wave frequency bands.

Abstract: In a multiple laser arrangement (1) with a plurality of phase-coupled laser diodes with lateral extremities (2, 3) of the multiple laser arrangement (1) including decoupling means for improving the output radiation of the laser arrangement. An absorbent material (4) or a synthetic material is provided at the lateral extremities (2, 3) for the purpose of reducing undesired transverse modes or ring modes.

Abstract: A digital synthesis technique provides pulse shaping in accordance with predetermined time domain and frequency domain constraints. In the technique, the informational content of a binary bit stream is used by an access circuit (12) to form address words for accessing a read-only-memory (13). The digital representations stored in the ROM (13) represent a superposition of temporally-displaced truncated impulse time functions, each weighted by the discrete transmission symbol levels of the analog output signal. The digital representations from two ROMs (13-1 and 13-2) are toggled by a sequencng circuit. In other embodiments of the invention, different memory arrangements ranging from a signal ROM (142) to an array of ROMS (163-1 through 163-3 and 164-1 through 164-3) are respectively used to decrease circuit complexity. In a digital radio transmission application of the technique, this arrangement is economical, readily reproducible and stable since it obviates the need for conventional complex analog filters.

Abstract: An electronic component such as a chip inductor, in particular an air core coil, RF choke and transformer is disclosed having a solid core portion (1) of the ferromagnetic or electrically nonconducting material, with a winding space to be wound in one or more courses and recessed relative to parallel end faces (2, 2) of the core portion. The end faces (2, 2) have dovetail-shaped cutouts (3, 3) located within the outside portion of these end faces for receiving tab-like electric contact elements (5, 5). These electrical contacts may be glued or wedged into these cutouts and retained therein under the action of resilient properties of the cutout elements.

Abstract: In order to match the trends and demands of modern nuclear medicine, a new scintillation camera head is designed, which features a new crystal-light guide-collimator unit for a single crystal scintillation camera. The effective crystal thickness is increased by crystal teeth designed as quadrilateral truncated crystal pyramids. The basis of each of these teeth is settled on top of a crystal plate of conventional thickness. The vertical axis of each of the teeth is aligned with the vertical axis of a particular collimator channel. Thus, the total number of crystal pyramids equals the number of (preferably squared) collimator holes. The space between the crystal pyramids is "filled" with an appropriate light guide material such as window glass. The crystal pyramid side is shaped, i.e. angled, according to the direction of the highest (gamma) photon energy the camera is designed for, after penetrating through the upper (close to crystal) portion of the collimator septum for a length equaling 2.mu..sup.

Abstract: Semiconductor rods are doped in a crucible-free, float-zone enclosure, by the introduction of dopant pellets into the float-zone. The dopant pellets are located in a hopper (7), mounted on the inside of the float-zone enclosure. The introduction of individual dopant pellets is controlled, through an actuating device (12), from the outside of the enclosure.

Abstract: Contact pieces for vacuum switches with axial magnetic field are designed, for example, as pot type contacts with codirectional slotting which contain in each instance a disk-shaped contact body of contact material and have an arrangement for the suppression of eddy currents. Conventional techniques for this purpose typically involves the cutting of radial slots in the contact bodies. In accordance with the invention, each contact piece (10, 110, 210) comprises a plurality of discrete elements (11, 111, 211) which are so arranged on the concrete carrier (2) that their edges (12, 13; 112, 113; 212, 213) form joints (25, 125, 225) and thereby define conductivity jumps for the suppression of the eddy currents. Specifically the discrete segments (111, 211) are produced by reshaping a cylindrical blank (100) of circular cross section into a semi-finished product of circular sectorial cross section.

Abstract: In the fabrication of micro-electronic circuits, it is often necessary to arrange a number of patterned surfaces be well insulated from each other. At the same time, however, the pattern edges of the layer to be overlaid must present a defined slope angle of between the range of forty to sixty degrees, for example. The invention solves this problem through a two stage coating process in which a polymer is first applied which coats the edges and is then coated with a photoresist having good leveling properties.

Abstract: Electrical contact materials based on AgCdO with CdO as the main active component have proven to be particularly advantageous for low voltage switchgear in the power industry. However, when switching AgCdO contact materials, CdO, which is classified as toxic, can escape into the environment through burn-off. It is important, therefore, to keep the CdO content as low as possible in the contact material, or to exclude it completely. The contact material according to the invention is a sintered contact material consisting of AgSnO.sub.2 with at least two other metal oxide additives; namely, Bi.sub.2 O.sub.3, CuO and optionally CdO. Relative to SnO.sub.2, these additives Bi.sub.2 O.sub.3, CuO optionally CdO, amount quantitatively to a total maximum of 25 percent by volume of the total amount of oxide.

Abstract: A Schottky power diode includes a semiconductor substrate having a given band gap, a semi-insulating intermediate layer disposed on the substrate, an insulating layer disposed on the intermediate layer and a Schottky contact disposed on the intermediate layer, whereby the intermediate layer is disposed between the Schottky contact and the substrate, the intermediate layer having a density of localized states from 10.sup.17 to 10.sup.20 eV cm.sup.-3, the intermediate layer having a band gap larger than the given band gap in the semiconductor substrate, and the intermediate layer having a resistivity of between 10.sup.5 and 10.sup.11 ohm cm. On the other hand the insulating layer may be disposed on the substrate and the intermediate layer may be at least partly disposed on the insulating layer.

Abstract: A hearing aid has a housing insertable into the auditory canal, wherein the housing contains at least a microphone, an amplifier, an earpiece and a power source. In instruments of this kind it has turned out to be desirable to have, in addition to the usual volume control, an additional control for varying the way the incoming sound signals are influenced by the amplifier (i.e. its characteristic) to adapt to individual hearing impairments. For this purpose the hearing aid provides in the housing space for the battery a pitch control in such a manner that its actuating member can be operated at least when the power source is removed from the instrument. This makes it possible to reduce the space requirement for the pitch control so that even hearing aids insertable into the auditory canal can contain such an additional control.

Abstract: To keep the voltage rating of the components of a static converter as low as possible, the permanent magnets of a permanent magnetically excited converter-fed synchronous motor with a preferred direction of rotation which are mounted on circumferential surface of the soft-magnetic part of the rotor have a thickness which, along the line of the magnetization, increases from a first entering edge to the other leaving edge of the permant magnet with the thickness at the first edge being nearly zero. The magnetic air gap increases from said first edge to the adjoining pole gap. The supply currents having rectangular time patterns are controlled in accordance with the position of the rotor so that the electrical loading is routed only along the q axis.