In a data storage apparatus, memory chips are arranged in groups, each group having an address bus which is connected to the address inputs of all the chips in that group. Each address bus is terminated at both ends by circuits which perform the dual function of suppressing reflections and checking the addresses. Because reflections are suppressed, the time taken to address the store is reduced. O...

A convertible sofa-bed is disclosed which has a seating area, a back rest, and a mechanism support frame located below the seating area. A folding mechanism for supporting a mattress when the mechanism is unfolded and for supporting a seat in the seating area when folded with the mechanism located within the frame below the seat is also provided. The mechanism has first, second and third main sect...

An electrosurgical technique of achieving coagulation involves conducting a predetermined ionizable gas in a jet to the tissue at a predetermined flow rate sufficient to clear natural fluids from the tissue and to substantially expose the tissue stroma. Electrical radio frequency energy is conducted to the tissue in ionized conductive pathways in the gas jet. To achieve fulguration, the electrical...

A dual deadman timer circuit functions to reset a dual mode microprocessor in the event of loss of program control. The microprocessor has high and low power requirements corresponding to its two operating modes, and the deadman timer circuit also adjusts the output power level of an associated two-level power supply to ensure that sufficient power is available for the full operation of the microp...

A colored resin composition characterized in that it has a matrix of a thermoplastic polymer (A), typically a polyester, and a thermoplastic polymer (B), typically a styrene polymer, which is dispersed in the matrix and is separated in phase from the matrix, and the polymer (B) is filled with substantially the entire quantity of a colorant. Since the colorant is blended in only the dispersed phase...

A tyre having a pair of axially spaced-apart bead regions each reinforced by an annular bead hoop around which one edge of a carcass reinforcing ply is wrapped and a filler strip positioned in the axially outer region of the bead which extends circumferentially around the bead, has one edge radially inwards of the bead hoop and one edge axially outwards of the bead hoop and comprises substantially...

A crosslinked vinylidene chloride polymer microgel powder is recovered from a latex and dispersed with moderate shear in a nonsolvent for vinylidene chloride polymers, such as a polyol used in the preparation of polyurethane materials. A dispersion of the powder and a polyol is eminently suited for use in the preparation of polyurethane foams to impart enhanced flame-retardancy and load-bearing pr...

Non-woven sheet material (2) comprising synthetic fibres and auxiliary material (4) for imparting strength and rigidity to the sheet material, the auxiliary material having been subjected to heat and pressure so that the auxiliary material binds the synthetic fibres together and forms the sheet material, the synthetic fibres being such that they form the major component of the sheet material, and ...

A helical scan optical system comprises, in coaxial disposition, a drum (2) around which a tape is helically wrapped and an optical image rotator. The rotator is disposed inside the drum (2) and both the drum (2) and the rotator are coupled to respective hollow, coaxial drive shafts (5). The optical axis of the system passes coaxially along the two drive shafts.

In atomizing a body of molten material having elevated melting point by directing the molten body as a stream into an atomization zone and directing a stream of atomizing gas into said stream to atomize and disperse it, the orifice from which the gas is delivered is positioned closely proximate the surface of the stream to be atomized, e.g. less than 0.45 inches way. A large percentage of fine par...

A method for mounting for a spot-type disc brake with an actuating device consisting of a piston (40) and a cylinder (38). The cylinder being closed by a cover (60) on one side and a dust boot (42) being positioned between the cylinder, and the piston, which dust boot is formed with annular beadings that are secured in circular grooves of the cylinder and of the piston, respectively. The dust boot...

A mild activation process for the adhesion-activation of polyamide mouldings for electroless metallization comprises treating the substrates, successively or simultaneously, with the solution of a mixture of CaCl2, LiCl and/or MgCl2 with AlCl3, FeCl3 and/or TiCl4 in a lower alcohol and with an activator solution based on inorganic complex compounds of the formula Mn+[Em+Halz-] in which M represent...

A web of gray cotton fibers is entangled by passing it under a series of low pressure liquid jets which are oscillated in a direction transverse to the direction of travel of the web. The entangled web is then subjected to a cotton bleaching step, and then dried, to produce a coherent nonwoven fabric that requires no resin binder.

A sleeve, which finds particular application in the environmental sealing of joints between insulated pipes, comprises heat-recoverable polymeric sheet material provided at separate regions of a principle surface thereof with a layer of a heat-activatable adhesive for bonding the sheet to the pipe insulation, and a layer of a sealant to accommodate flexibility in the joint. A layer of a sealing ma...

The aim of the invention is to achieve high removing rates in rough grinding by suitable dressing of the abrasive element and hence to increase the effectiveness of the grinding. The object of the invention is to provide a method and a device which make it possible to produce, for the rough grinding, an optimal working profile of the abrasive-element cutting face and at the same time to minimise t...

The invention relates to the cocurrent gasification of coal and to a gas generator. The gas generator (11) comprises a vertical sealed vessel, the lower third of which is divided into several identical vertical compartments (12). Coal is loaded at the top (17). The major part of the hot reactive gas under pressure is introduced at the top (18), and the remaining part at lower levels (21, 22). Gas ...

A gear differential is disclosed for supplying driving torque from an input shaft to a pair of aligned axially spaced output shafts, including a carrier housing driven by the input shaft and having a center section and a pair of end cover sections, a pair of side gears journalled in opposite ends of the center section for splined connection with the output shafts, respectively, and pairs of differ...

In a main transmission gearbox for a helicopter having two engines, a lifting rotor and an anti-torque rotor, each of the two engines drives a main kinematic chain comprising from upstream down, an input shaft, a twistable shaft, a gear train forming a first reduction stage having a first bevel pinion meshing with a second bevel pinion which drives in rotation a vertical shaft bearing having a thi...