Abstract: A PCI bus master supporting cascading PCI arbitration. The cascading arbitration allows another PCI initiator on the same bus to share the request and grant signal pair to/from the PCI central arbiter. This allows two PCI devices to appear as a single source to the PCI central arbiter. When a request and grant signal pair are cascaded, they are connected to a subordinate arbiter contained within the cascading bus master. The subordinate arbiter is connected to an internal request and grant signal pair from the cascading bus master, and to an external request and grant signal pair from the cascaded device. The cascading PCI bus master then arbitrates between its internal request and the external cascaded device request and issues the resulting request to the central PCI arbiter. When the grant signal from the central arbiter is returned, the cascading bus master routes it to the appropriate internal or external device. Thereby, bus master support signals can be expanded without having to add a costly bridge.

Abstract: A collar, slidably carried upon the barrel of a wand-type spray gun, is normally urged rearward against a stop by a compression spring. Disposed between the stop and the collar is a ring-like member which rocks relative the barrel using the edge of the collar as a fulcrum. The ring-like member abuts a lip extending radially inward from the forward end of a holder tube and prevents expulsion of the spray gun in response to the rearward force from the emission of high pressure fluid from the nozzle of the spray gun. Slight pressure upon the handle readily withdraws the spray gun from the holder and tapered fins carried by the collar. A ramp depending from the lip guides the spray gun into the holder.