Siemens Aktiengesellschaft

Hans Brandl

Markus Meier

Johann Bauer

Burghard Unteregger

Peter Schlegl

Werner Liegl

A vacuum contactor includes a stationary contact and a moving contact, which can be moved in order to produce a current-carrying connection. In order to guide the moving contact during its movement in the enclosure, at least one guide element, which can be moved in a groove, is provided on the moving contact.

Vacuum contactor with movable guide element

Method for receiving carrier oscillations modulated with a useful signal. For a universal transmitting/receiving device, a method for the automatic adaptation of its modem to the type of modulation of the incoming signal is provided in which the incoming DPSK signal is first demodulated. The demodulator output signal is then converted into a polar co-ordinate representation and, after formation of the difference phase angle (.DELTA..phi.), its value frequency (H) is represented modulo 90.degree. in a histogram which can be evaluated for derivation of the control information.

Method for receiving carrier oscillations modulated with a useful signal

A circuit for electronically synthesizing speech has an audio generator for representing voiced sounds and a noise generator for representing voiceless sounds and a means for selecting significant parameters of the various speech elements by sampling and a means for storing those parameters. The circuit also includes a filter unit comprised of a number of individual filters and a means for selectively driving only those individual filters having filter coefficients necessary for representing the significant parameters of the particular speech element to be synthesized. The filters can be utilized individually or combined into selected groups in order to generate longer speech segments. The electronic signal at the output of the filter unit is edited for acoustically reproducing the desired speech elements and segments.

Circuit for electronic speech synthesis

A differential digital modulation and demodulation system with an analog signal-dependent sampling clock has a sampling clock-controlled first digital modulator and a predictably functioning second digital modulator, an analog signal to be converted to a digital signal being supplied to both modulators. A control signal for the sampling clock generator for the first digital modulator is generated from a tracking error signal of the second digital modulator, so that the clock frequency of the first digital modulator is increased upon an increasing tracking error and is decreased upon a decreasing tracking error. For digital signal transmission or storage, the digital signal bits are emitted by the modulator and received by the demodulator in the form of signal blocks which include a bit group indicating the respective sampling clock frequency in encoded form. Only one signal block indicating the pause length in encoded form is emitted or received for a particular analog signal pause.

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Maxhuette-Haidhof, Germany

Hans Brandl