Abstract: The invention relates to the provision of an improved bearing and to apparatus incorporating the same. The bearing is particularly for use in environments where the bearing is submerged in a fluid and is used in conjunction with a component which allows the flow of fluid therethrough. The bearing has an inner and outer race and a cage within which a series of ball bearings are provided. In accordance with the invention a channel is formed between the cage, inner and outer races through which fluid can pass. The provision of the flow, prevents clogging with debris and minimises damage due to corrosion or other chemical attack on the bearing.

Abstract: A compound of the formula 1

Abstract: A pipeline communication system. The system uses the pipeline and the adjacent ground and includes branches with junctions. Governor modules and transformers/rectifiers form part of the network. Monitors periodically provide information to the network controller. The system control receives information by way of an outstation to provide two-way communication and control using the pipeline and adjacent ground as conductors. Typically, the information in the form of fast frequency shift keying modulation is superimposed on the cathodic pipe protection system.

Abstract: A rotary spa jet, of the type which comprises a nozzle rotatably mounted within the end of a spa jet housing by a radial ball bearing, is provided with an internal flow guide to reduce impairment of the free rotation of the nozzle caused by debris in the spa water. The flow guide is positioned within the spa jet housing and acts on a portion of the water flow which reaches and flows through the radial ball bearing to flush and lubricate it. The flow guide includes one or more annular baffle walls which deflect water flow which reduce the amount of water that flows through the bearing and slows down its rate of flow to promote settlement and collection of debris before it reaches the bearing.

Abstract: A compound of formula wherein the substituents are defined as in the specification and salts or hydrates thereof is disclosed as well as a method of treating disorders associated with the inactivation or excessive degradation of cholecystokinin.

Abstract: The present invention relates to compounds which are useful as sunscreens. The compounds persist on the skin for much longer than conventional sunscreens because they comprise a Michael acceptor linked directly or indirectly to a chromophore. The Michael acceptor is capable of undergoing a conjugate addition reaction with thiol groups present in cysteine residues of keratin and thus the compound is chemically bound to the skin and will not be removed by immersion in water.

Abstract: An air compressor having a piston driven via a crankshaft from an input shaft by means of a multi-plate clutch which is normally held in engaged condition by a spring device. The clutch and spring device are contained within a housing which includes a retainer placed, after the spring device has been pre-loaded to a desired extent, in a position determined by said pre-loading and secured in that position to maintain the spring device in pre-loaded state. The crankshaft is housed within a crankcase and passages interconnect the interiors of the crankcase and clutch housing, with the casing ends of the passages at a higher level than a predetermined permissible oil level for the crankcase. This permits crankcase pressure during operation to expel oil from the crankcase along the passage into the clutch casing, while limiting the height to which oil may accumulate in the crank case when the piston is stationary.

Abstract: An air compressor having a piston driven from an input shaft via a multi-plate clutch which is normally held in engaged condition by a spring device which is pre-loaded by one or more screw members arranged to apply a compressive force across the spring device and also to maintain the clutch in assembled condition.

Abstract: An air compressor has a piston (3) reciprocable to compress air within a cylinder (2), a clutch (16) to transmit drive from a drive input shaft (12) to the piston when compression is required, a piston (27) arranged to be responsive to pressure resulting from the compressor output operable to disengage the clutch (16) and thereby interrupt drive to the compressor piston when the pressure reaches a predetermined value, and a passage (37) to provide a leakage path for the pressure applied to the piston (27) to enable the pressure to decay in a controlled manner when further operation of the piston is required, whereby engagement of the clutch is permitted to occur progressively and shock loadings on the compressor components are minimized.

Abstract: A quick release valve for a vehicle braking system has an inlet port, an outlet port for connection to a brake actuator, and an exhaust port closed during operation of the actuator by a working area of a diaphragm. A support area of the diaphragm surrounding the area has peripheral indents with re-entrant edge portions. Reduction of the support area by formation of the indents lessens noise produced by the valve during exhausting after operation of the brake actuator.