Abstract: Spring-tension pliers are disclosed having two clamping arms (2, 3) mounted see-saw fashion on a pivot pin (1), the arms forming a handle (4) with their legs, the legs being pivotable toward one another against the force of a spring (5) to open a clamping mouth formed by the other ends of the legs (6), with clamping jaws (7) being associated with the free ends of the clamping legs (6). The clamping jaws (7) are pivotable around a pivot axis (8') parallel to the pivot joint axis, end sections (9) of the clamping legs are rounded concentrically with respect to jaw pivot axis (8'), and these rounded areas (11) each fit into a correspondingly rounded recess (10) of the clamping jaws.

Abstract: An arrangement is provided for electrically connecting a rotatable current contact to a stationary voltage, such as used in the connection of an airbag in an automobile steering wheel. The arrangement comprises an insulated electric line which extends between the current contact on one side and a voltage, current or signal source on the other side and which is coiled around a rotary shaft member. The electric line is in the form of a helical spring, the spring being disposed on an inner housing portion which is positioned on the rotary shaft member and is non-rotatably connected thereto. An outer stationary housing portion encloses the inner rotatable housing portion with the helical spring being situated between the two housing portions.

Abstract: An implant for the jawbone includes a shaft portion and a conical retention portion which is provided with displacement projections. The displacement projections are sickle-shaped retention wedges which are provided on the retention portion located opposite each other. Since the retention portion is conical and the retention wedges result in an oval cross-section, the implant can be inserted into the prepared alveolus having the same shape and a rotation of at most 90.degree. results in locking of the implant in the interradicular alveolar bone to provide primary stability.

Abstract: An optical fiber plug-in connection includes a coupler with a coupler centering sleeve, a coupler sleeve centrally retained within the coupler centering sleeve and a fiber containing coupler pin accommodated in the coupler sleeve. The coupler cooperates with a plug which includes a plug centering sleeve insertable in the coupler centering sleeve, a cable clamp supported in the plug centering sleeve, and a fiber containing plug pin which is radially elastically supported relative to the plug centering sleeve.

Abstract: An emergency hammer for smashing panes of glass is disclosed. The hammer includes a handle and a hammer head on the handle. The hammer head has a point at one end and is connected to the handle at the opposite end. The hammer head may be integrally attached to the handle. The hammer head thus protrudes a substantial length from the handle in only one direction. A protective loop of a relatively rigid and dimensionally stable material is also on the handle and extends in the same direction for covering the hand of the person grasping the handle.

Abstract: A waveguide device for producing absorption or attenuation includes a waveguide section which is provided with an external absorber material. For allowing a transfer of the high-frequency power into the absorber material, the wave section is provided with coupling apertures via which the absorber material is in connection with the interior of the waveguide section.

Abstract: A waveguide usable as absorber or as attenuator for high radio-frequency powers up to highest frequencies includes a tube with a dissipative material at whose inside a metallized layer is applied. The thickness of the metallized layer changes along the length of the tube with its initial thickness and end thickness determined in such a manner that a constant power density is obtained along the waveguide.

Abstract: For the transmission of a plurality of light channels between two parts which rotate relative to each other, an optical transmission element is arranged with its optical axis OA coaxial to the axis of rotation and light transmitters in different radial regions. By convex lenses or mirrors the bundles of rays coming from the light transmitters are parallelized and impinge on the optical transmission element which individually focuses the bundles of rays. In order to obtain an imaging scale of 1:1 a synchronously rotating rhomboid prism or a parabolic mirror can be used. In addition, HF channels can be transmitted.

Abstract: The invention relates to an HF terminating impedance in strip conductor technique in which the resistive layer is enclosed between two ceramic plates which are clamped from the outside by metallic heat dissipating plates, the freedom from reflection of the terminating impedance being ensured by the lateral edge lines of the resistive layer satisfying the condition ##EQU1## To ensure an intimate heat conduction contact between the resistive layer and the ceramic plates and the ceramic plates and the adjoining clamping plate without introducing bending stresses into the ceramic plates which might cause fracture, at the contact surfaces a soft metal foil, preferably of lead, is inserted which is prevented from cold flow by a rolled-in grating or netting, in particular of bronze or copper.

Abstract: Apparatus and method for holographic storage of data utilizing a light source and a number of light deflectors such that a single beam can be used to read data from a number of different holograms simultaneously.