Abstract: Height adjustment means for a cylindrical brush in a carpet sweeper with a U-shaped adjusting yoke which loads the cylindrical brush and is mounted in the housing by angled parts molded on the free ends of its members and is loaded at the summit part by a spring connected to an adjusting slide and riding up on ramp surfaces.

Abstract: A cleaning brush for brushing clothing has a slip case that circumferentially surrounds a passage having a brush therein. The slip case has open ends, the brush being slid into and out of the slip case through either end. The slip case acts as a handle. Stops are provided at each of the open ends to prevent the brush from being separated from the slip case.

Abstract: A floor-sweeping machine consisting of a housing with a revolving brush which is mounted rotatably therein and is driven by means of running wheels and which is located between two dirt-collecting spaces, the two dirt-collecting spaces being formed by dirt-collecting containers which can be taken out of the housing upwards, and the dirt-collecting container having a resilient locking device which secures it in its operating position and which can be transferred by hand into its release position, and in which, to make it substantially easier to operate and especially to take out and empty the dirt-collecting containers, the two dirt-collecting containers 24, 25 are connected to one another and have a common top side 27 in which, approximately centrally, there is a part 35 which is to be grasped by the operator and is to be moved to a limited extent in the lifting-out direction and which, when moved in the lifting-out direction, transfers the resilient locking device 36 into the release position.

Abstract: Floor-sweeping machine consisting of a housing with a revolving brush which is mounted rotatably therein and which can be driven by means of running wheels projecting from the under side of the housing, and in which, for the purpose of rapid assembly and removal, the revolving brush 14 is mounted rotatably by means of two bearing clasps 19 which engage on its ends and which each have a bearing receptacle 24 for the associated bearing end of the revolving brush 14, and the bearing clasps 19 are themselves retained by securely positioned clamping onto housing parts 23.

Abstract: Ceramic capacitors are made by printing green ceramic limps with a fugitive electrode material, stacking the printed limps and firing the stacked assembly to form the ceramic and remove the fugitive electrodes. This provides an array of laminar voids in the body. The ceramic is doped to form boundary layers, terminations are applied, and the voids are then filled, such as by vacuum impregnation, with an electrode metal.

Abstract: A dielectric composition which is particularly suitable for the manufacture of ceramic capacitors, comprises lead magnesium niobate with additions of one or more lead titanate, lead stannate, or lead zirconate. The composition can be fired at a temperature between 950.degree. and 1100.degree. C., which is lower than the conventional firing temperatures of 1200.degree. to 1400.degree. C. The lower firing temperature means that, in the case of multilayer ceramic capacitors, the internal electrodes can be made of cheaper materials than previously with resultant materials and process cost savings. Some of the compositions exhibit higher dielectric constants than conventional Z5U ceramics, which means that capacitor device size can also be reduced.

Abstract: An optical fibre directional coupler has first and second optical fibres clamped together by a piece of low index heat-shrunk tubing 12. The first fibre consists solely of a core 10 and cladding 11 while the second has a core 13 a primary cladding 14 whose cross-sectional area is larger than that of the core, and a secondary cladding 15. The outermost layer of each fibre is absent over a portion of its length within the tubing 12 so that the core 10 of the first is in intimate contact with the primary cladding 14 of the second. The second fibre may have a mode stripper 45 to strip modes guided by the primary/secondary cladding interface. Fibre break detection apparatus and a single-fibre two-way transmission system are described which use such directional couplers.

Abstract: Connection to a tantalum capacitor electrode (17) is effected using a conductive paint layer (15), incorporating pure silver and pure copper particles, which minimizes silver leeching by a tincontaining solder alloy (18) by which the lead wire (17) is connected to the conductive paint layer (15), and thus minimizes power factor degradation.

Abstract: A multilayer ceramic dielectric capacitor comprises a plurality of layers of dielectric arranged in a stack. Between the dielectric layers are arranged metallic electrodes. Alternate electrodes in the stack extend to opposite end faces thereof, where they are electrically connected by end terminations. The electrodes each comprise a plurality of parallel conductive elements provided between two adjacent dielectric layers. The adjacent dielectric layers are bonded together along three of their edges and at the gaps between the conductive elements, thus providing a stronger structure than when the adjacent layers are only bonded at the three of their edges. The electrode pattern comprised by a plurality of parallel elements is particularly applicable to metal-impregnated ceramic dielectric capacitors, which employ fugitive electrodes that are burnt away during firing of the ceramic to leave spaces for subsequent metal impregnation.

Abstract: If a piezoelectric crystal is used in circuits containing ICs with low supply voltage, the additional capacitors required in oscillator or filter circuits cannot be implemented as junction capacitances. To eliminate the need for additional discrete capacitors, these capacitances are implemented with additional films on the crystal.

Abstract: The pump unit (2) is provided with a valve (6) at the pressure side, which is arranged to open a connection between the pump and the pump station thus obtaining a circulation. The valve is arranged at the upper side of the pump housing and the outlet of the valve is directed opposite to the flow direction (A) in the pump housing (4) thus minimizing the risk of clogging.

Abstract: An optical fiber submarine cable is made by extruding a metallic pressure tube by a friction extrusion technique, compressing the tube, applying tensile strength members, applying a conductive tape over the strength members and extruding plastic dielectric material over the tape. Armoring can subsequently be applied for shallow water application.

Abstract: End terminations for multilayer ceramic dielectric capacitors, particularly but not exclusively metal-impregnated capacitors, are provided by bonding a coarse ceramic powder, which is lightly coated with silver, to the capacitor ceramic by means of a glass frit in order to produce a porous pseudo end termination containing insufficient silver to provide a good contact to the capacitor electrodes. The exposed silver in the pseudo end termination is then provided with a silver sulphide layer and subsequently the pseudo end termination is impregnated with lead. The end termination thus formed is comprised substantially of lead, which is held in place by the silver sulphide layer, that is wetted by the lead, on the bonded ceramic powder, and thus low cost and readily solderable.

Abstract: Conductive and porous end terminations for metal-impregnated multilayer ceramic dielectric capacitors are provided by firing a silver, or silver alloy, and glass frit onto respective end regions of a sintered capacitor stack. The exposed silver of the fired terminations is provided with a silver sulphide layer, the latter being a good electrical conductor and acting as a barrier between the silver and the impregnation metal, for example lead, during a subsequent impregnation step, whereby to prevent leaching of the silver. The termination is readily solderable by virtue of the silver sulphide layer being wetted by the lead during the impregnation step and resulting in a lead coating in the termination.

Abstract: In an assembly of a piezoelectric crystal and an IC on a substrate, additional capacitors, such as load capacitors of a crystal oscillator, are designed as blocks for mounting the crystal on the substrate at its vibration nodes.

Abstract: A plastic fiber cable has a flame retardant sheath which contains between 10-40% by weight of an inert filler, preferably titanium dioxide, which provides the sheath with thixotropic non-drip properties so that as well as possessing non-flammability properties the sheath when molten will also not drip and thus will not expose more flammable materials, such as the strands, inside the sheath.

Abstract: An optical fibre submarine cable is made by extruding a metallic pressure tube by a friction extrusion technique, compressing the tube, applying tensile strength members, applying a conductive tape over the strength members and extruding plastic dielectric material over the tape. Armoring can subsequently be applied for shallow water application.

Abstract: A telephone security system particularly for use with cordless telephone, operates to prevent the base station of the system from being accessed by an unauthorized user.Preselected digits are set by means of switches. In order to receive a dial tone, the correct digits as selected by the switches must be dialed. The security system operates to compare the dialed digits with those digits set by the switches. If a favorable comparison is had, the security device then connects the telephone line to the base station and allows dial tone to be transmitted to thereby enable a call to be implemented by the user.

Abstract: An improved electro-optical device to multiple fiber splitter coupling arrangement comprising an electro-optical device having a light emitting region, a plurality of optical fibers each having a core and a cladding, the fibers being fused together and drawn to form a taper, the taper having a light receiving end, and means for securing the taper to the electro-optical device such that the light receiving end is optically coupled to the light emitting region.