Abstract: An apparatus for and method of efficiently adding software modules to large scale data processing systems. The customer is supplied all potentially applicable software modules upon system installation. However, each optional software module requires a key for enabling user access. Whenever the user needs an additional key on an emergency basis, it is requested via the Internet. Upon receipt of the request, the software supplier verifies entitlement of the requester to the key including licensing, payment, and configuration concerns. The key is supplied over the Internet upon verification of entitlement.

Abstract: An improved inducer for a gas furnace having a housing and cover includes a number of radially extending tabs spaced around the inducer cover. Each of the tabs has an aperture formed therein. The inducer housing is provided with a number of flexible arms including a barbed detent at the distal end of each arm. The flexible arms are spaced around the outside of a side wall of the housing, fabricated from the same material as the housing, and correspond in number and placement to the tabs on the cover. A sealing channel with a gasket provided therein is formed on the interior side of the cover. The sealing channel corresponds in shape to the top edge of the housing side wall. When the channel gasket is placed in contact with the top edge of the wall and each respective barbed detent within a corresponding tab aperture, a force exerted against the housing and cover will cause the arms to bend slightly and the detents to snap into the tab aperture thereby securing the cover to the housing.

Abstract: There is disclosed a furnace having an air flow path for heated air and combustion products that passes through a condensing heat exchanger. Condensate forming in regions of negative and positive pressure is separately conducted to a unitary condensate trap of minimal vertical height incorporating therein separate traps for handling the high and low pressure gaseous environments. The condensate is drained through a common outlet port into the atmosphere or into a drain pipe.

Abstract: A pair of sealing skirts join the inducer to the collector box of a condenser induction furnace, and accommodate offset in positions of the inducer inlet opening and the collector box outlet port. The two mating skirts are congruent and of generally triangular shape. A ridge or lip of one fits a groove on the other to form an airtight gasketless seal.

Abstract: A burner assembly for a gas furnace includes an elongated support member and a number of individual burners. The support member includes consecutive yoke sections for receiving a corresponding burner and shelves for supporting a flange segment formed around the periphery of each burner. Each flange segment of the burners includes a pair of mounting apertures which receive bendable tabs provided on the support member when the burner is positioned within a corresponding yoke section and supported by consecutive shelves. When the tabs are bent over, the individual burners are secured to the support member. The support member also includes mounting ears for quickly mounting and removing the burner assembly to a bracket provided in the burner box of the gas furnace.

Abstract: A multi-cell secondary heat exchanger for use in a high efficiency, multi-poised furnace wherein each cell has outwardly extended exit or entrance bells that are received in grooves formed in adjacent cell panels. The grooves surround exit or entrance ports and are filled with a sealing material that provides a fluid tight seal between the cell panel and the bell.

Abstract: A cell panel for a gas furnace having a burner box containing combustion burners includes burner target plates formed by an extrusion process from the sheet material forming the cell panel. The burner target plates include a concave side positioned to face the discharge side of a corresponding burner, and a convex side upon which the flared inlet port of a corresponding heat exchanger cell may be securely seated.

Abstract: An inducer (40) for causing a flow of combustion air into and gases of combustion through and out of a furnace (10) of the condensing type. The inducer is intended for use, without modification of its design or size, in a series of furnaces of the same basic design but having different heating capacities and therefore different requirements for flow through the induction flow path. The furnace design is such that a given furnace is capable of operation so as to provide a flow of air to be heated that is either up, down or horizontal with only minor field modification on installation. The inducer has two discharges (43), only one of which is used in a given installation. The other discharge is blocked with a plug (61) of special configuration that can vary the output of the inducer to ensure optimum flow of combustion air into and gases of combustion through and out of the furnace.