Abstract: A counterbalance apparatus (60) for an overhead door (12) of the sectional type has a torsion spring assembly (62, 64, 66, 70) mounted so as to be raised and lowered with operation of the door curtain (14.1, 14.2, 14.3, 14.4). The torsion spring assembly (62, 64, 66, 70) is loaded as the door (12) is lowered. A drive motor (100) of a drive mechanism of the door (12) can be mounted on the door curtain (14.1).

Abstract: The invention provides a method for providing an indication of the occurrence of events within a database system. The database system stores data accessible by a plurality of users and in a plurality of data formats. The method comprises the steps of periodically reading a storage location within the database, detecting a data structure stored in the storage location and reading the data structure. The method further includes the steps of converting the data structure from the first data format to a second data format and providing the indication to at least one user, the indication including at least a portion of the data structure.