Abstract: Synthetic swellable layer silicates corresponding to the following formulaMgO.aMA.bAl.sub.2 O.sub.3.cSiO.sub.2.nH.sub.2 O (I)in whichM is Na.sup.+ and Li.sup.+ having an Na:Li ratio of at least 1;A is F.sup.-, OH.sup.- or 1/2O.sup.2- or a mixture thereof;a is 0.1 to 0.6;b is 0 to 0.3;c is 1.2 to 1.7; andn is 0 to 3.0.are used in water-based well-servicing fluids as a high-temperature-stable thixotrope substantially unaffected by alkaline earth metal ions.

Abstract: A laundry pretreatment composition comprising an invertmicellar ternary mixed phase containing from 5 to 15% by weight of at least one anionic surfactant or from 25 to 45% by weight of at least one nonionic surfactant, and from 50 to 55% by weight of at least one cosurfactant in the presence of an anionic surfactant or from 35 to 50% by weight of at least one cosurfactant in the absence of anionic surfactant, and from 45 to 30% by weight of water in the presence of anionic surfactant and from 40 to 5% by weight of water in the absence of anionic surfactant.

Abstract: A method of drawing an optical fiber through a fabric, having opposite first and second sides, comprises the following consecutive steps: advancing the optical fiber by a fiber transport device in a hollow needle to a predetermined extent; pushing the hollow needle, together with the optical fiber, through the fabric from the first side to the second side until a free end of the optical fiber has traversed the fabric to a predetermined extent; withdrawing the needle from the fabric to the first side thereof while maintaining the optical fiber substantially stationary relative to the fabric; gripping the free end of the fiber by a grasping device on the second side; pulling the optical fiber through the fabric until a predetermined pulled-through length of the optical fiber is obtained on the second side; and servering the optical fiber by a cutting device on the first side.

Abstract: A capacitive linear or rotary transmitter for controlling and positioning displaced objects by measuring the displacement, angle or speed of the displaced object is formed, in one embodiment as a rotary transmitter, by two mutually opposed stators defining a reciprocal spacing, their gap having rotatably arranged in it a rotor which is rotatably coupled to a spindle which is coupled to the displaced object. Capacitive values varying during the rotation of the rotor may be measured in the air gaps produced in each case between one stator and the rotor, and the other stator and the rotor. To attain a superior degree of precision and resolution, coatings are so arranged on the rotor and the stators, as to produce at least two concentric annular areas, of which one area forms the measurement track of a coarse measuring system and the other area forms the measurement track of a precision measuring system.

Abstract: An automatic adjusting device for a disc brake having a brake piston displaceably arranged in a brake cylinder for the purpose of actuation of a brake shoe. This device which is actuatable by means of a hydraulic and a mechanical actuating device, includes an adjusting member between the brake piston and the mechanic actuating device which member is composed of two adjusting elements, an adjusting spindle and adjusting nut interconnected via a thread without self-locking engagement. It further comprises a friction clutch having conical friction surfaces for fixing one of the adjusting elements in position on mechanical actuation. One of the conical friction surfaces is on one of the adjusting elements and the other friction surface is on a mechanically actuatable clamping member. It also comprises a bowl-type (cup-shaped) spring retainer which is secured to the brake housing by means of an accommodation sleeve.

Abstract: Powder-form lubricant additives for water-based drilling fluids which contain from 95 to 30% by weight, based on the total weight of the powder, of highly disperse silicas, from 5 to 70% by weight, based on the total weight of the powder, of one or more fatty acid alkyl esters corresponding to the following general formula.R.sup.1 COOR.sup.2 (I)in which R.sup.1 is a straight-chain or branched, saturated or mono- or polyunsaturated C.sub.9 -C.sub.21 alkyl or alkenyl radical and R.sup.2 is a straight-chain or branched C.sub.1 -C.sub.12 alkyl radical, and/or polyesters obtainable by reaction of di-, oligo- or poly-hydroxy compounds with carboxylic acids and/or distillation residues from the transesterification of native fatty acid esters and, optionally, other additives known for lubricating purposes in quantities of from 0 to 20% by weight, based on the total weight of the powder, and to the use of these powder-form additives in drilling fluids for oil well and mine drilling in quantities of from 0.

Abstract: Apparatus is described for moving a sheet to be machined in a step-by-step fashion. A continuously running machine, illustratively in the form of a printer, is disposed at a machine station. A motor drives a sheet mover to move the sheet in a first direction and in a second, opposite direction along a path past the machine station.

Abstract: A magneto-optical light switching element comprising islands which are formed from an epitaxial layer on the basis of bismuth-substituted rare earth metal iron garnet, which layer is provided on a magnetically unordered, optically transparent, (111)-oriented garnet substrate, integrated heating resistors being provided on the islands which are surrounded by a coil, the epitaxial layer being grown from a melt which contains lead oxide and boron oxide as a flux, the boron content of the melt used for growing the epitaxial layer being in the range from 12.7 to 25 at % (cation content) and the coil being constructed as an integrated coil.

Abstract: A pin guide and damping bushing for the caliper of a floating-caliper spot-type disc brake which is provided with a brake carrier and a caliper axially slidable relative to the brake carrier and straddling a brake disc and brake shoes. The brake carrier or the caliper is provided with a least one pin which is guided in a bore of the caliper or of the brake carrier. At least one elastic guide element (4) is provided for the pin and inserted in the bore, a stop element (6) which on itself is rigid and limits radial motions of the pin within the bore and which is configured with a base body having a substantially circular cylinder-shaped cross-section and is provided with outwardly extending extensions (26) constituting stop faces. One section of the damping and guide element (4) is arranged in interstices which are formed externally between said extensions.

Abstract: A plurality of spindles of a textile machine are all mechanically interconnected and individually grouped, the individual groups of the spindles are driven by respective polyphase electric motors having respective feed lines all connected in parallel to the output lines of a polyphase electric power supply. Either the current or the voltage of the supply is maintained generally constant independent of load and a characteristic of the electricity in the feed lines of only one of the motors is monitored in the constant-current system or in the output lines of the supply in the constant-voltage system. An alarm, for example an optical or acoustic signal or just an indication on a display or printout, is generated when the characteristic of the electricity in any one of the monitored lines varies substantially from that of the other monitored lines.

Abstract: Planar optical waveguide having a crystal body consisting of a nonmagnetic substrate having a first magnetooptical layer epitaxially provided on the substrate and a second magnetooptical layer epitaxially provided on the first mangetooptical layer. The two magnetooptical layers consist of a material based on iron garnet. The second magnetooptical layer has a refractice index n.sub.2 which is approximately 1.times.10.sup.-3 to 1.times.10.sup.-2 higher than the refractive index n.sub.1 of the first magnetooptical layer. A layer of a material based on iron garnet and absorbing radiation in the wavelength range of 1.0.ltoreq..lambda..ltoreq.2.5 .mu.m is provided between the substrate and the first magnetooptical layer, said iron garnet-based layer having a refractive index n.sub.A which is higher than the refractive index of the first magnetooptical layer.

Abstract: A pour point depressant composition and a method for its use. The pour point depressant is a predominantly butadiene polymer epoxidized and then ring-opened with a C.sub.12-24 carboxylic acid, or ring-opened with an alcohol followed by esterification.

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.

Abstract: An expansion hose having a central internal throttle element dividing the interior of the hose into two chambers, and an internal hose extending from the expansion hose inlet through one of the chambers and the throttle element into the second chamber. The portion of the inner hose within the first chamber has radial throttle passages, and the portion within the second chamber is imperforate.

Abstract: A flexible hollow body fillable with fluid medium and formed of a double fabric having an upper web and a lower web respectively having an outer surface with a layer of elastomeric material and forming an inflatable chamber therebetween including a coated cover fabric applied to at least one of the layers of elastomeric material, the cover fabric having strip-shaped regions detached from the layer of elastomeric material to which the cover fabric is applied so as to define respective tubular chambers; angular strips disposed within the tubular chambers at respective edges thereof for joining the one layer of elastomeric material and the coated cover fabric to one another; the tubular chambers being formed, respectively, with at least one inlet opening for inflating the tubular chambers.

Abstract: A process for the production of oxidation-resistant sintered silicon nitride bodies having improved mechanical strength involves dissolving aluminum oxide, aluminum nitride, or mixtures thereof by diffusion in the surface of the sintered silicon nitride bodies. The diffusion is effected by embedding the bodies within powder of aluminum oxide, aluminum nitride or mixture thereof and by heating the embedded bodies to a temperature of at least 1300.degree. C.

Abstract: A clear-rinse agent concentrate for mechanical dishwashers containing, as sheeting component, from 10% to 80% by weight of a reaction product obtained by reacting under acid catalysis conditions (1) an aldose selected from the group consisting of a reducing monosaccharide having 5 to 6 carbon atoms and an oligosaccharide thereof having from 2 to 4 monosaccharide units, with (2) a polyglycol ether having an average molecular weight of from 190 to 450, in a molar ratio of from 1:0.4 to 1:1.5; as well as the method of clear-rinsing employing said agent.

Abstract: A circular knitting machine has a needle selection system which can be set up to provide selection under electronic control, or to provide for manual selection. The selection system has a plurality of slidable selection cams which are controlled by an electro-magnetic system to act on rocking selector jacks, the electro-magnetic system being operated by an electronic control program. For manual selection, the electro-magnetic system serves to hold all of the selection cams in an excluded position and selection is obtained by manually insertable cams which act on the selector jacks.

Abstract: Method of recording visible data wherein a polymeric layer containing acetyl acetonate is disposed through an image pattern to a laser beam.