Patents by Inventor Horst Strelow

Horst Strelow 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).

  • Patent number: 4594681
    Abstract: In a plural channel safety output circuits, for example for railway safety purposes, binary signals of a pair of data lines are fed to two trigger elements each of which control a respective gate stage. These two gate stages receive clock pulses from a clock pulse generator which provide control for the entire data processing system. The signals emitted from the gate stages are monitored by a common equivalence monitoring element such that when the signal pairs at the outputs of the two gate stages are alike, the equivalence monitoring element passes test pulses released by the clock pulse generator back to the clock pulse generator to maintain the clock pulse supply. These test pulses also control a voltage source which is dependent upon them, and which supplies energy to at least one switching element in one of the two output channels. A fail-safe amplifier can be connected to at least one of the gate stages.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: June 10, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Eue, Horst Strelow
  • Patent number: 4400792
    Abstract: A respective microcomputer is provided for each processing channel in a data processing system constructed according to safety principles. The information to be output to the process are determined by both microcomputers and are supplied in pairs to two non-fail-safe comparators which drive respective AND gates. Each of the AND gates drives a respective amplifier. The power supply of one amplifier occurs from a battery or the like and the power supply of the other amplifier occurs by transformer-coupled output signals of the first amplifier, which signals are then rectified. The information required for the process are coupled via at least one further amplifier whose power supply is provided by a transformer-coupled and rectified output signal of the second amplifier. Given a signal discrepancy between the two microcomputers, information is not permitted to the process which could lead to a dangerous situation.
    Type: Grant
    Filed: January 16, 1981
    Date of Patent: August 23, 1983
    Assignee: Siemens Aktiengesellschaft
    Inventor: Horst Strelow
  • Patent number: 4222515
    Abstract: A digital data processing arrangement for railroad installations having two similarly designed sequential circuits employing microprocessors and operating in accordance with the 2v2-principle. A joint pulse current supply produces two control signal pairs which are displaced with respect to each other by at least one processing step, whereby the two sequential circuits which are processing the same information in relation to the respective processing phase exhibit a condition of inequality. Thereby, interferences simultaneously affecting the two sequential circuits in the same manner have a different readable effect. Specific comparators which take into consideration the condition of inequality are connected to similar inputs or outputs of the microprocessors. The comparison output of the comparators is interrogated by the pulse current supply after each processing step in a conjunctively linked manner. This leads to the release of an additional control signal pair required for the subsequent processing step.
    Type: Grant
    Filed: May 24, 1978
    Date of Patent: September 16, 1980
    Assignee: Siemens Aktiengesellschaft
    Inventor: Horst Strelow
  • Patent number: 4149069
    Abstract: The invention relates to a safety circuit for a data processing system comprising two micro computers which operate in a redundant fashion receiving similar inputs and having similar output lines conveying coincident or corresponding signals during proper operation which are indirectly connected to a common push-pull amplifier. A transformer is connected in circuit with the push-pull amplifier and a conversion circuit constructed from the flip-flop trigger elements produces a pair of signals for operating the push-pull amplifier when the signal pair logic 1 exists. When the signal pair of logic 0 exists, the push-pull amplifier does not operate. The conversion circuit operates in connection with a clock pulse current supply for the two micro computers so that in the case of malfunction, no clock pulses are produced.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: April 10, 1979
    Assignee: Siemens Aktiengesellschaft
    Inventor: Horst Strelow
  • Patent number: 4096990
    Abstract: A digital data computer processing system useful particularly for railway safety engineering which includes at least two central processing units with related input and output units which are controlled by a common pulse current supply and which uses a plurality of comparator units that receive inputs from the two computer processing units as well as an input from the pulse current supply which is fed in series through all of the comparator units and back to the pulse current supply such that when such signal returns through all of the comparator units to the pulse current supply it continues to enable both computer units and supply pulses and power to them. If the output signal from the pulse current supply does not return to the pulse current supply through the series connected comparators, the pulse current supply then disconnects power and pulses to the processing units so that error signals will not be provided to a controlled process.
    Type: Grant
    Filed: December 13, 1976
    Date of Patent: June 27, 1978
    Assignee: Siemens Aktiengesellschaft
    Inventor: Horst Strelow