Abstract: A thermal chamber, e.g. for culturing bacteria, has between a pair of sidewalls, a plurality of replaceable bridge members or plates which can be formed with undulating broad surfaces or grooves to accommodate flasks so that gaps between the plates receive measuring devices for turbidity or the like. The plates are thermally conductive and abut the walls which can be provided with heating or cooling units.

Abstract: A hobbing accessory is disclosed for a vertical milling machine of a type comprising a column, a knee mounted to the column so as to be vertically positionable with respect to the column, a saddle mounted to the knee so as to be horizontally positionable with respect to the knee, toward and away from the column, a table mounted to the saddle so as to be horizontally positionable with respect to the saddle, in opposite directions across the column, a head projecting from the column, an arbor mounted operatively to the head and rotatable about a generally vertical axis, and a motor for rotating the arbor about the generally vertical axis.

Abstract: A spent catalyst distributor in a fluid catalytic cracking unit regenerator is self aerated by attaching to the underside of each trough arm a contiguous lip which captures rising aeration fluid and uses the aeration fluid to aerate spent catalyst flowing through the trough arms of the spent catalyst distributor. Orifices in the bottom plate of each trough arm pass the captured aeration fluid up into the spent catalyst flowing within the trough arm. The aeration fluid provides aeration and fluidization of the spent catalyst to facilitate the flow of the spent catalyst through the trough arms of the spent catalyst distributor.

Abstract: The present invention provides a water-based drilling fluid that reduces water adsorption and hydration of argillaceous rocks. The drilling fluid comprises a glycol with a molecular weight of less than about 200, an organic cationic material such as salts of choline or an organic salt of potassium, a filtration control agent, a viscosifier and water.

Abstract: A method of supplying fuel to a combustion chamber of a turbojet engine having a low power head with a plurality of low power fuel injectors and a high power head having a plurality of high power fuel injectors is disclosed in which fuel is supplied to the plurality of low power fuel injectors during low power operation of the engine, fuel is supplied to a first fuel circuit in the plurality of high power fuel injectors during high power operation of the turbojet engine and fuel is also supplied to a second fuel circuit in the plurality of high power fuel injectors during low power operation of the turbojet engine, the second fuel circuit being separate from the first fuel circuit. This method of supplying fuel to the dual head combustion chamber optimizes operation of the combustion chamber in all modes of engine operation.

Abstract: The activity of angiotensin converting enzyme (ACE) is measured in biological samples as body fluids. ACE-activity is estimated in minimally diluted specimens, using the natural substrate angiotensin I at close to physiological concentration. Femtomoles of generated angiotensin II are trapped by specific high affinity monoclonal antibodies and thus protected from degradation by angiotensinases during the incubation step. The same antibodies are subsequently used for quantitation by radioimmunoassay.

Abstract: A drawer guide for a pull-out component of a piece of furniture includes a carcass rail fixedly attachable to an inner side of the piece of furniture, a support rail for supporting the pull-out component, a middle rail arranged between the carcass and support rails and having at least two, arranged one above another, horizontal flanges which serve as tracks for a plurality of freely rotatable rollers, and at least one stop provided between the middle and support rails for limiting a pull-out path therebetween and projecting through a recess formed in the lower one of the two flanges, with the stop cooperating with a track roller provided on the rear end of the support rail.

Abstract: A compression glass lead-in arrangement in a metal body, especially in metal housings for semiconductors, in particular integrated circuits. The lead-through arrangements hermetically seal the interior of the housing relative to the environment. A glass bead is fused into a bore in the housing and the connecting conductor of the integrated circuit is passed outwardly through the glass. Alloys of the systems Cu, Al and Mg, during a cooling phase after the fusing-in exhibit a hardening effect which provides that in conjunction with the alloys, it is possible to produce compression glass lead-in arrangements which possess a hermetic sealing integrity even after a high degree of thermal and/or mechanical loading, have a high resistance to fluctuations in temperature and good resistance to corrosion.

Abstract: A insulation system for providing temperature control of a surface includes a flexible heating element, conformable to the surface. Insulating material is disposed adjacent to the heating element. Circuitry is provided for sensing the temperature of the surface. A monitor senses the temperature of the surface and selectively controls the temperature of the heating element in response to the monitoring process.

Abstract: An aircraft seat cushion comprises a foamed plastic supporting body consisting of a lower supporting part, an upper sitting part, the lower sitting part being detachable from the supper surface of the supporting part, and a detachable flameproofing layer covering the upper surface of the sitting part and the edges of the sitting and supporting parts, and a flameproof layer covering the entire lower surface of the supporting part so that the cushion is encapsulated in the flameproof layers.

Abstract: A device is provided for detachably fastening an embroidery frame, slidingly arranged on a support surface, to a drive member of a feed mechanism of a sewing or embroidery machine. The device includes a coupling device acting in a positive-locking manner and nonpositively acting locking device. Two coupling pins, which are located at mutually spaced locations from one another in the horizontal direction and carry a head each, are fastened to the said embroidery frame. A holding element is fastened to the drive member and contains two elongated holes, which extend in parallel to the said support surface of the machine and whose height corresponds to the diameter of the said coupling pins. A free space is provided in the area of the elongated holes for the heads of the said coupling pins.

Abstract: The device includes dispensing units, each of which features a pair of counter-rotating rollers, between which there is inserted the end of a blister band unrolling from a reel and pushed toward a delivery opening. A blade moves vertically and cooperates with the edge of a support surface, situated downstream of the two rollers, to cut the blister band after a predetermined number of products, counted by a sensor, have passed through the delivery opening. An electric motor drives two ratchet coupling mechanisms acting in opposite directions and connected, by belts or chains, with pulleys or toothed wheels which are integral respectively with the rollers and with a pinion meshing with a rack fastened to the blade. An electronic unit controls and checks the working of the device. Optionally, a token, or coin receiver, a banknote reader or other payment mechanism may be used to allow the user to activate the dispenser after making a payment.

Abstract: In a braking device for roller skates (1), especially in-line (i.e. "single-track") roller skates, with a brake block (5) which is removably secured to the frame (2) or the boot (1), the brake block is mounted on the frame (2) or boot so as to pivot against the force of a spring (6), thus permitting gentle application of the brake. At the same time, maximum braking is possible if needed, due to a projecting part of the brake block (5) which is supported in a guide and can be applied to or moved against a roller, without risk of putting the skater off balance during braking.

Abstract: The invention presented herein makes it possible to construct and operate an engine monitoring apparatus that calculates the engine speed, the engine load and/or engine monitoring quantities basically only from the measurement of an angular velocity curve at the gear rim of an internal combustion engine (optionally, from a plurality of angular velocity curves). The basis is thus simultaneously created for monitoring all other measured quantities within narrow limits that are dependent on load and speed. The invention can also be utilized for control purposes or for measuring power.

Abstract: Highly active catalysts, for olefin polymerization, from tetraneophylzirconium and partly hydroxylated metal oxides from group IIa, IIIa, IVa or IVb of the Periodic Table, which are essentially free from by-products.

Abstract: In an information transmission system, in particular a telephone system, the subscribers can be connected to a dial exchange over a line. At the dial exchange end and at the subscriber end of the line are connected bidirectional multiplexers or demultiplexers over a bidirectional modem circuit which modulates and demodulates the data according to the intended transmission. If required, bidirectional compressor and decompressor circuit are connected to the multiplexers and demultiplexers, to which the subscribers are connected through a forward and a backward channel and a SLAC (bidirectional analog-digital converter (CODEC) with subscriber interface circuits (SLIC)), or to which a relaying device of the dial exchange is connected through drive circuits.

Abstract: A sulfated solid catalyst is provided which comprises (1) oxide or hydroxide of Group III or Group IV element, e.g. zirconium, and (2) a first metal comprising a metal or combination of metals selected from the group consisting of platinum, palladium, nickel, platinum and rhenium, and platinum and tin. The catalyst may further comprise (3) a second metal selected from the group consisting of Group VIII elements, e.g. iron. One embodiment of the invention further comprises (4) a third metal selected from the group consisting of Group V, VI and VII elements, e.g. manganese. The catalyst of the invention is useful for the isomerization of normal alkanes having 4 to 40 carbon atoms per molecule, for the naphtha upgrading of a hydrocarbon feedstock and for the hydrocracking of a hydrocarbon feedstock.

Abstract: This invention relates to a goods-handling cart having chassis provided with a drive and steer wheel together with two swivelling stabilizing wheels, and at least one spring-effect element which acts on both of the stabilizing wheels via a mechanism that transmits a downwardly-directed vertical force to the stabilizing wheels, the mechanism is not attached to the wheels but merely bears thereagainst via simple contact surfaces engaging respective mounting elements for mounting the wheels in such a manner that the mechanism is free to move away from one or other of the mounting elements in a direction opposite to the direction in which the spring-effect element acts; retaining mechanism being associated with each wheel to limit displacement thereof in a downwards direction relative to the chassis.

Abstract: A press jacket is formed of an elastomeric jacket material having two layers of reinforcement threads, namely an inner layer and an outer layer, embedded in it. The inner layer is formed of longitudinal threads which upon operation of the press device extend parallel to the axis of rotation of the press jacket. The outer layer is formed by a fabric layer or by circumferential threads which are wound helically and which, upon operation of the press device, extend approximately in the direction of travel of the press jacket. The reinforcement threads are surrounded by the layer of elastomeric material, which is produced homogeneously. The inner surface of the press jacket has longitudinal grooves which extend parallel to the longitudinal threads and have a depth of 0.1 to 0.2 mm.