Abstract: A convertible child resistant closure for use with a container having a threaded portion adjacent the container opening allows a user to select between a child resistant closure and an easily openable closure and includes coaxial inner and outer caps. The inner cap has a cover wall and a side wall. The side wall includes an inner surface having a threaded portion for engagement with a threaded container opening, and an outer surface including a child resistant portion comprising a series of angular abutments extending thereabout and a non-child resistant portion axially offset from said child resistant portion. Features of a side wall of the outer cap selectively engage features of the inner cap side wall in either a configuration for the child resistant closure or a configuration for the easily openable (non-child-resistant) closure.

Abstract: A convertible child resistant closure for use with a container having a threaded portion adjacent the container opening allows a user to select between a child resistant closure and an easily openable closure and includes coaxial inner and outer caps. The inner cap has a cover wall and a side wall. The side wall includes an inner surface having a threaded portion for engagement with a threaded container opening, and an outer surface including a child resistant portion comprising a series of angular abutments extending thereabout and a non-child resistant portion axially offset from said child resistant portion. Features of a side wall of the outer cap selectively engage features of the inner cap side wall in either a configuration for the child resistant closure or a configuration for the easily openable (non-child-resistant) closure.

Abstract: A subscriber loop test device is connected across a subscriber loop adjacent a subscriber equipment and remote an associated switching office. The subscriber loop test device includes a relaxation oscillator and a connection circuit responsive to a predetermined high voltage applied at the switching office for connecting the relaxation oscillator to the subscriber loop. The relaxation oscillator responds by drawing an energizing current which it modulates at the operating frequency of the oscillator. Detection of this frequency in the switching office verifies the DC and the AC continuity of the subscriber loop. Additional contacts in the connection circuit are used to disconnect the subscriber apparatus for the duration of the operation of the test device so that faulty subscriber apparatus will not interfere with verification of subscriber loop serviceability.