Abstract: A toilet seat (1) with an automatic cleaning device (10), the toilet seat (1) including: a first assembly (2) with a mounting panel (7) that can be secured to a rear section of a lavatory body (8); and a second assembly (3) which includes a lavatory seat ring (9) able to be driven in the peripheral direction, a bearing frame (29) for the lavatory seat ring (9), a drive device (26) for the lavatory seat ring (9), secured to the bearing frame (29), and a cleaning device (10) for the lavatory seat ring (9), likewise secured to said bearing frame (29). The first and second assembly (3) are pivotally interconnected by means of hinge joints (4).

Abstract: The invention relates to a toilet seat (1) with an automatic cleaning device (10), said toilet seat (1) comprising: a first assembly (2) with a mounting panel (7) that can be secured to a rear section of a lavatory body (8); and a second assembly (3) which comprises a lavatory seat ring (9) able to be driven in the peripheral direction, a bearing frame (29) for the lavatory seat ring (9), a drive device (26) for the lavatory seat ring (9), secured to said bearing frame (29), and a cleaning device (10) for the lavatory seat ring (9), likewise secured to said bearing frame (29). The first and second assembly (3) are pivotally interconnected by means of hinge joints (4).

Abstract: Method for reducing the content of spurious signals in the output signal of a mixer and mixer designed for carrying out the method according to the invention. When using quadrature mixtures as generators for tunable rf signals it has been found to be a disadvantage that differences in the two channels of the quadrature mixers lead to a high content of undesirable mixture signals. The content of disturbing mixture signals in the output signals of such mixers is reduced according to the invention by feeding the ring modulators of the quadrature mixer with signals differing from pure sine oscillations, which are phase-shifted relative to each other by 90.degree. and which have been determined in such a manner that all pairs of d.c. signals supplied to the two ring modulators result in output signals which have all the same amplitude and each of which has a phase position conforming exactly to the phase position to which the respective pair of d.c. signals is assigned.