Patents by Inventor Manfred Eher

Manfred Eher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Circuit arrangement for centrally-controlled telecommunications exchange systems, comprising central control units and an alternate circuit arrangement
    Patent number: 4700381
    Abstract: Two parallel-operated control units each communicate via a respective discrete bus with a respective assigned group of switch devices, and given an alternate circuit based on one control unit simultaneously accepting the tasks for both groups, an alternate circuit bus is provided from the accepting control unit to the other group of switch devices and has bidirectional bus amplifiers connected therein, the one bus amplifier being supplied with voltage together with the accepting control unit and its group and the other bus amplifier being supplied with voltage together with the other control unit and its group. Given a voltage outage of the non-accepting control unit and its assigned group of switch devices, a signal is transmitted to the first-mentioned bus amplifier in order to provide the required disconnection of the alternate circuit bus by way of unequivocal electrical switch states and measures in that bus having supply voltage present.
    Type: Grant
    Filed: May 16, 1985
    Date of Patent: October 13, 1987
    Assignee: Siemens Aktiengesellschaft
    Inventor: Manfred Eher