Abstract: An embodiment of a data processing system is disclosed that utilizes a modular feature design that enables the presentation of a user interface that dynamically hides or exposes features of varying complexity throughout the system based on feature identifiers that can be enabled or disabled in a runtime context. In one embodiment, the system implements digital audio workstation software that dynamically generates an interface including a menu system to show or hide advanced features based on an application feature level that is determined by the target user level of the system. In one embodiment, a set of features used by a document is automatically enabled for the document while the document is active.

Abstract: An improved automatic inlet damper is disclosed which is particularly suited for use in oil burners. A flexible coupling (16-44) is connected between rotating shafts (10, 12) and supports an automatically actuated closure (64) which is moved into and out of engagement with an aperture (14) by a centrifugally actuated linkage (46-62, 78-110). See FIG. 1.