Abstract: A multidimensional ring network includes a plurality of network processing devices that are connected together with a plurality of individual ring networks. Packets are sent between any two network processing devices on the same ring network. Intermediate network processing devices, located on that same ring, between the sending and receiving network processing devices, do not add additional hops to the packet transfer. The intermediate processing devices, between the sending and receiving devices, simply pass the packets through to the next processing device on that ring. The packets are passed through to the destination processing device without the intermediate network processing devices having to read or process the packet headers.

Abstract: An improved spray gun having an aluminum gun body and a sprayhead made of a plastics material, preferably of polybutylene terephthalate. The sprayhead is permanently secured to the spray gun body, preferably with a swaged ring of stainless steel. The spray gun may be provided with a plastic handle which is preferably formed from polybutylene with 10% of a polyester elastomer. In one embodiment, the sprayhead is oriented relative to the gun body prior to securing to select either gravity feed or suction feed for the sprayed fluid.

Abstract: In an hydraulic actuating assembly for a vehicle shoe-drum brake comprising first and second relatively slidable members, the first member is provided with a longitudinally extending bore which is closed at one end and in which works a portion of the second member, and a sealed hydraulic chamber is defined within the bore between the closed end of the first member and the second member. One of the members incorporates an inlet port for the chamber and a vent port is located in a portion of the wall of that member to provide an indication, by external leakage of hydraulic fluid, of failure of the sealing of the chamber.