Abstract: A method and apparatus for the transmission of information between a track (11, 12) and a vehicle (13, 14) located on the track in a model railroad system, whereby when electrical contact between the vehicle and track, such as between a wheel of the vehicle and a rail of the track, is lost, a capacitor that then exists between the vehicle and the track is used for the transmission of information.

Abstract: A method for automatic train control in a digitally controlled model railroad system includes detecting a polarity change of a track voltage applied to the track by means of a digitally controlled motor vehicle running on the track. The track voltage being a modulated control voltage which is normally symmetric and asymmetric in galvanically isolated track sections. After each detection of a change of polarity, the voltage level of the control voltage applied to the track is sampled independently for each rail of the track by means of the digitally controlled motor vehicle running on the track. The voltage values sampled for each rail of the track are compared to each other and evaluated with regard to any asymmetry occurring in the amplitude of the track voltage with reference to each rail of the track. Depending on the result of the evaluation, the travel operation of the motor vehicle is influenced that is otherwise controlled by the digital control system.

Abstract: Device for reception of a portable computer, notebook, laptop, and the like, especially for working in a standing position. Device includes a foot portion, a column fixed to the foot portion and at least one supporting arm projecting laterally from the column, at which a desk top for the reception of the computer is arranged. The inclination and distance of the computer relative to the column is adjustable. The foot portion may include at least three horizontally disposed detachably interconnected arms. The column is detachably connected to the foot portion and at least one of the supporting arms is detachably and, for the adjustment of the desktop's inclination, rotatably fastened to the column. The foot portion is provided with castors. The device is engineered to be mobile, and easy to assemble and disassemble for being compactly folded up, transported, space-savingly stored and stowed away.

Abstract: A method for automatic train control in a digitally controlled model railroad system includes detecting a polarity change of a track voltage applied to the track by means of a digitally controlled motor vehicle running on the track. The track voltage being a modulated control voltage which is normally symmetric and asymmetric in galvanically isolated track sections. After each detection of a change of polarity, the voltage level of the control voltage applied to the track is sampled independently for each rail of the track by means of the digitally controlled motor vehicle running on the track. The voltage values sampled for each rail of the track are compared to each other and evaluated with regard to any asymmetry occurring in the amplitude of the track voltage with reference to each rail of the track. Depending on the result of the evaluation, the travel operation of the motor vehicle is influenced that is otherwise controlled by the digital control system.

Abstract: A method and device for digital control of electrical consumers in a model railway comprising supplying consumers having contact to a track with energy by means of a square wave voltage which is applied to the track and controlling the consumers by modulation of the square wave voltage in accordance with a digital control information, generating a return signal in a consumer having been supplied with such control information, interrupting application of the square wave voltage from the track during a predetermined time interval, the consumer applying the return signal within the predetermined time interval to the track being now square wave voltage free and detecting the return signal transmitted via the track by means of a sensor connected to the track.

Abstract: A method and apparatus for the transmission of information between a track (11, 12) and a vehicle (13, 14) located on the track in a model railroad system, whereby when electrical contact between the vehicle and track, such as between a wheel of the vehicle and a rail of the track, is lost, a capacitor that then exists between the vehicle and the track is used for the transmission of information.

Abstract: A method and device for digital control of electrical consumers in a model railway comprising supplying consumers having contact to a track with energy by means of a square wave voltage which is applied to the track and controlling the consumers by modulation of the square wave voltage in accordance with a digital control information, generating a return signal in a consumer having been supplied with such control information, interrupting application of the square wave voltage from the track during a predetermined time interval, the consumer applying the return signal within the predetermined time interval to the track being now square wave voltage free and detecting the return signal transmitted via the track by means of a sensor connected to the track.

Abstract: A method and device which digitally controls moveable and/or stationary electrical consumers in a model railway. The power for the consumers is supplied over the track in the form of a square wave voltage signal which is frequency and/or pulse width modulated according to digital control information for the consumers generated by a central control unit of the model railway. A consumer, after having received a control information addressed to said consumer, applies a return signal to the track, which return signal has a higher frequency than the frequency of the modulated square wave voltage. This return signal is detected by synchronising the detection to the square wave voltage such that the return signal is detected in periods of the square wave voltage signal which are free of signal edges.

Abstract: A method and device which digitally controls moveable and/or stationary electrical consumers in a model railway. The power for the consumers is supplied over the track in the form of a square wave voltage signal which is frequency and/or pulse width modulated according to digital control information for the consumers generated by a central control unit of the model railway. A consumer, after having received a control information addressed to said consumer, applies a return signal to the track, which return signal has a higher frequency than the frequency of the modulated square wave voltage. This return signal is detected by synchronizing the detection to the square wave voltage such that the return signal is detected in periods of the square wave voltage signal which are free of signal edges.