An interface for connects a mobile phone and a plain old telephone service phone. A central orifice for pulling a vacuum is surrounded by an array of convergingly-directed gas jets, forming a \u201cvirtual sampling chamber\u201d. In an exemplary embodiment, multiple execution units may reside on a network. Another manually-powered drive device includes a first drive assembly extending coaxially in the barrel portion of the housing and a second drive assembly extending in the intermediate frame portion of the housing between any acute angle and any obtuse angle to the first drive assembly. Other embodiments are also described and claimed. The sinker ring has a plurality of radial slots, each of which accommodates at least one sinker, the sinker ring being arranged inside the radial dimensions of the needle cylinder and the sinkers being shaped so that their beak is directed toward the axis of the needle cylinder.