Abstract: A contact lens disinfecting composition in solid form for addition to water comprises a contact lens disinfecting agent which is a source of hydrogen peroxide when in water, such as sodium percarbonate; an inactivating agent in delayed-release form such as sodium thiosulphate; and a color change indicator.

Abstract: A fairing 13 for an element is made up of body sections 17. Each body section 17 comprises a moulded plastics body which has an open recess or hollow 18 along its leading edge 19. The body section 17 becomes slightly wider to the rear of the leading edge 19 and then increasingly rapidly decreases inside along a smooth curve until reaching a trailing portion 20 which thins, at a much slower rate, to edge 21. The mouth of the hollow 18 is defined by lips 23 which are dimensioned to straddle a trailing portion of the cable 12.In use, the body section 17 automatically aligns along the line of movement of the cable 12 and the body is held against the cable. The arrangement is such that the body sections will compensate for sidewards forces or drags.

Abstract: In a process for the manufacture of a moulded product by compression of a powder or granules in a die, a powdered die lubricant is used, lubricant particles are electrically charged and the charged particles are fed to the die in advance of the moulding powder. An apparatus for carrying out the process is also provided, the apparatus including a first feed for feeding a powdered lubricant to the die, a second feed for feeding moulded powder to the die after the powdered lubricant, and means for maintaining the electrical potential of the die at a predetermined value different from that of the powdered lubricant.

Abstract: The invention is a method for sizing polytetrafluoroethylene fabrics comprising:(a) forming a sizing composition of a perfluorinated polymer containing sites convertible to ion exchange groups and a treating agent having: a boiling point less than about 110.degree. C.; a density of from about 1.55 to about 2.2; and a solubility parameter of from greater than about 7.1 to about 8.2 hildebrands;(b) contacting the sizing composition with the fibers of a polytetrafluoroethylene fabric; and(c) removing the treating agent from the sizing composition.Particularly preferred as a treating agent is a compound represented by the general formula:XCF.sub.2 -CYZX'wherein:X is selected from the group consisting of F, Cl, Br, and I;X' is selected from the group consisting of Cl, Br, and I;Y and Z are independently selected from the group consisting of H, F, Cl, Br, I and R';R' is selected from the group of perflluoroalkyl radicals and chloroperfluoroalkyl radicals having from 1 to 6 carbon atoms.

Abstract: Hydrophilic soft contact lenses are disinfected by soaking in a non-eye-irritant aqueous disinfecting solution obtained by the addition to tap water of a chlorhexidine salt, a sequestering agent for calcium and magnesium ions, and a dechlorinating agent. Suitably, the solution is obtained by dissolving a tablet in tap water. The preferred sequestering agent is sodium tripolyphosphate and the preferred dechlorinating agent is sodium thiosulphate. Advantageously, the chlorhexidine salt is provided in solid solution in urea to assist complete dissolution.

Abstract: This disclosure relates to vibration damping supports and in particular to a suspension unit for a stretcher.The stretcher support unit comprises a rectangular base frame (10) on which is supported, by means of a resilient support mechanism, a stretcher frame or carrier (11). The support mechanism comprises a pair of cantilever arms (20) inclined upwards in opposite directions and each pivotally mounted at its lower end on the base frame (10). The movements of the cantilever arms (20) are controlled by respective gas-liquid suspension units (30), which are mounted between the base frame (10) and an extension arm (28) of each cantilever arm (20). The suspension units comprise, in one embodiment, a gas reservoir (70), a sealed liquid reservoir (71), a flexible diaphragm (72) forming one end of the liquid reservoir and an actuator piston (73).