Abstract: A telephone station is composed of a handset and a housing composed of an upper housing part and a bottom tub. In order to reduce the risk of an arc-over due to electrostatic discharge between the joining locations of the bottom tub and the upper housing part to damage the electronic components in the interior of the telephone housing, the upper housing part has an edge region which overlaps a rim provided on the bottom tub with a substantially large amount of overlap.

Abstract: A connecting panel for joining communication components, the connecting panel having projections introduceable into pocket-shaped receptacles in the base of the communication components and being held in guides at the base. The connecting panel is designed essentially Y-shaped and has projections spacially offset relative to one another. These projections are at two arms that proceed parallel to one another and are joined to one another by a centrally located arm. A further arm proceeding perpendicularly relative to the centrally located arm has a projection proceeding in its longitudinal axis. The guides provided at the base are in the form of ribs having a T-shaped cross section.

Abstract: In a two-wire bidirectional telephone transmission line, a power converter and a directional threshold detector form in combination an impedance transparent bilateral voice-signal controller which can supply stable voice-switched gain to a dominant signal originating from either direction and a simultaneous, equal loss to any signals propagating from the other direction without separating the respective signals.

Abstract: A gyroscopic instrument which may be a compass includes a hollow sphere enclosing at least one motor-driven gyroscope and floating in an electrically conductive liquid within the inner surface of revolution of a vessel surrounding the sphere at a distance therefrom providing for a gap therebetween. A motor-driven pump circulates the liquid through an inlet of the vessel, through the gap, through an outlet of the vessel and through a passageway back to the pump. The surfaces confining the gap have pairs of opposite conductive electrode portions for conducting electrical energy to the motor-driven gyroscope or gyroscopes. The liquid circulating through the gap exerts a bearing pressure on the sphere holding it spaced from the inner surface of the vessel. For this purpose the gap has a relatively narrow bearing zone communicating with the inlet and a relatively wider zone communicating with the outlet.