Abstract: A plastic heat exchanger has a shell with tanks disposed side-by-side. First and last distribution tanks straddle heat transfer tanks. The shell has a plurality of flow gaps, to allow coolant to flow between adjacent tanks. Spacers hold the flow gaps open. Upper and lower flanges are adhesively attached to the shell. Flange holes align with the tanks. Each flange hole has an annular wall encircling one of the tanks to preclude the shell from expanding. Upper and lower manifolds are adjacent the flanges, and have chambers disposed side-by-side for each heat transfer tank. Baffles are adapted to be removably received between the chambers to selectively block flow. A plurality of tubes extends between upper and lower tube headers, comprising a tube bundle, removably received within each of the heat transfer tanks. A header O-ring is between each header and flange. A seal plate is disposed against each flange. Each seal plate has seal plate holes in alignment with the flange holes, defining a hole pair.

Abstract: A plastic heat exchanger has a shell with tanks disposed side-by-side. First and last distribution tanks straddle heat transfer tanks. The shell has a plurality of flow gaps, to allow coolant to flow between adjacent tanks. Spacers hold the flow gaps open. Upper and lower flanges are adhesively attached to the shell. Flange holes align with the tanks. Each flange hole has an annular wall encircling one of the tanks to preclude the shell from expanding. Upper and lower manifolds are adjacent the flanges, and have chambers disposed side-by-side for each heat transfer tank. Baffles are adapted to be removably received between the chambers to selectively block flow. A plurality of tubes extends between upper and lower tube headers, comprising a tube bundle, removably received within each of the heat transfer tanks. A header O-ring is between each header and flange. A seal plate is disposed against each flange. Each seal plate has seal plate holes in alignment with the flange holes, defining a hole pair.

Abstract: A virtual collaboration social or work unit or sphere of trust allows participants to contact others within the sphere, using a method designated by the participant being contacted without the participants needing to be aware of the underlying communications infrastructure or method of contact, and without any of the participants having to sharing connectivity information. In a preferred embodiment, the infrastructure can be any method of contact available to the users, including but not limited to, the public Internet, instant messaging, public or private telephony systems, or wireless communication technologies.

Abstract: A heat exchanger transfers heat between primary and secondary fluid coolants. A housing has a longitudinal central axis lying within a transverse housing plane. A bottom wall with a concave inner surface faces upward and extends along the central axis. A plurality of arcuately helical lower sector fins are spaced apart along the central axis on the bottom wall inner surface. A cover has a longitudinal central axis lying within a transverse cover plane. A top wall with a concave inner surface faces downward and extends along the central axis. A plurality of arcuately helical upper sector fins are spaced apart along the central axis on the top wall inner surface. A copper tube is assembled into the housing in a direction transverse to the housing axis with the tube closely adjacent the lower sector fins. First and second sealing means seal the tube ends to the housing. The cover is assembled into the housing in a direction transverse to the housing axis with the upper sector fins closely adjacent the tube.

Abstract: A shell and tube heat exchanger has two shell coolant and two tube coolant passageways communicating with a cavity in a shell. Removably received in the shell cavity is a tube bundle with tube headers. A locating screw extends through the shell to engage a locating recess in one tube header. The screw locates the tube bundle angularly about the central axis and longitudinally along the central axis, and is also used to electrically ground the tube bundle. An end cover, a flow separator, and resilient disc to take up thermal expansion are installed in each end of the shell to direct coolant through the tube bundle in multiple passes. Receivers with rotatable connectors are bonded to each shell coolant and tube coolant passageway. Angled connector nozzles can be connected to external conduits in any orientation.

Abstract: An integrated database indexing system includes a database containing data and a query source communicably connected to the database. A query router connected to the query source communicates with an index engine. The index engine accesses an index associated with the data in said database. When query source communicates a command to the query router, the query router communicates the command to the index engine such that the index engine identifies result data in the data contained by the database.

Abstract: A service creation system for a communications network of the intelligent network type has three different levels at which service creation activities can be carried out, these being SCE1, SCE2 and SCE3. The use of separate levels allows access to the service creation system to be kept functionally separate for users having different interests in the network. Hence, features which have to be installed at the network element level for a selected service to be available can be created in SCE1. Marketable service features, which give a view of features in that they encapsulate call handling logic thereof together with support and management descriptions of the feature, can be created in SCE2. Service packages, which permit collection of marketable service features to meet requirements of a service together with service-specific support and management information, can be created in either of Sce2 or SCE3.

Abstract: A communications network offers a variety of services to the customer while being able to add or modify the portfolio of services available. A service delivery infrastructure is provided, which would sit in the Service Control Point of an intelligent network architecture, and which delivers services using an array of service independent features. In the arrangement described, the service delivery infrastructure has an object oriented architecture and interacts with systems, such as billing and network management in the communications network by means of objects within the infrastructure. An aspect of the infrastructure is the provision of selected sets of services to users of the communications network, which selected sets effectively provide dedicated service networks to each customer.

Abstract: An improved feeder apparatus for livestock which includes an enclosure for containing feed, at least one feeding trough positioned adjacent the enclosure and at least one slidable side door disposed over an opening in the enclosure for unloading feed into the trough. A pair of bars are attached to the enclosure adjacent the outwardly facing side of the slidable side door. The bars are positioned in close proximity to each other so that an elongated slot is formed therebetween parallel to the direction of slide of the door. The door includes an outwardly projecting threaded post which extends through the slot and a wing nut is threadedly connected to the post so that the wing nut can be tightened against the bars to lock the door in a selected position.

Abstract: A pair of brackets movably attached to a rail defining a pulpit at the bow of a boat for removably securing at the bow an anchor of the pivoting fluke type, the anchor having a pair of flukes connected to a rod which extends beyond the flukes, each of the brackets having a structure for securing it to the rail and each having apparatus for removably securing the anchor at the opposite ends of the rod.