Patents by Inventor Helmut Schröder

Helmut Schröder 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).

  • Elevator rescue system
    Patent number: 6196355
    Abstract: An elevator rescue system includes a power source of back-up electrical power. A manually-operated, rescue enable switch switchably permits the transmission of electrical power from the power source to a motor brake coil of an elevator car during a rescue operation such that the energized coil releases the motor brake to move the car to a desired landing. A speed detector measures the speed of the elevator car and thereupon generates a speed control signal corresponding to the speed of the car. An overspeed detection circuit has a first input for being actuated when receiving electrical power from the power source, a second input for receiving the speed control signal, and an output for transmitting electrical power to the motor brake coil when the speed control signal is below a predetermined value and for automatically stopping the transmission of electrical power when the speed control signal becomes higher than a predetermined value. A manually-operated brake release switch has an input and an output.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: March 6, 2001
    Assignee: Otis Elevator Company
    Inventors: Richard N. Fargo, Gerard Sirigu, Helmut Schröder-Brumloop, Joseph J. Barna, Barry G. Blackaby
  • Belt-climbing elevator having drive in counterweight
    Patent number: 6193018
    Abstract: An elevator system includes a counterweight-drive assembly (26) having a motor (32) and drive pulley (36) mounted internally to engage a drive belt (42) for climbing or descending with respect thereto, resulting in raising or lowering of an elevator car (12) coupled to said counterweight-drive assembly (26).
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: February 27, 2001
    Assignee: Otis Elevator Company
    Inventors: Helmut Schröder-Brumloop, Jean Marc Ferrary, Armando Servia, Pascal Rebillard, Richard J. Ericson
  • Remote storage and reset of elevator overspeed switch
    Patent number: 6186281
    Abstract: An elevator overspeed system designed to work as a governor includes a first switch responsive to an overspeed condition and a second, remotely located switch responsive to said first switch. An overspeed elevator control procedure is initiated when one of the first or second switches are tripped. The first switch is automatically re-set after the second switch is tripped. The second switch is manually re-set to re-start the elevator system in normal operation mode.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: February 13, 2001
    Assignee: Otis Elevator Company
    Inventors: Chris Pietrzykowski, Gerard Sirigu, Richard N. Fargo, Randy G. Henley, Helmut Schröder-Brumloop, Gurumurthi Ravishankar
  • 14,17.beta.-ethano-14.beta.-estratrienes and estratetraenes, process for their production, and pharmaceutical preparations containing them
    Patent number: 4789671
    Abstract: 14,17.beta.-ethano-14.beta.-estratriene and estratetraene of Formula I ##STR1## wherein R.sup.1 is a hydrogen atom, a methyl or an acyl group of a monocarboxyclic acid of 1-12 carbon atoms,R.sup.2 is a hydrogen atom or an acyl group of a monocarboxylic acid of 1-12 carbon atoms,R.sup.3 is a hydrogen atom or a methyl group, and ##STR2## is a single or double C--C-bond show strong estrogenic activity.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: December 6, 1988
    Assignee: Schering Aktiengesellschaft
    Inventors: James R. Bull, Russell I. Thomson, Henry Laurent, Helmut Schroeder, Rudolf Wiechert
  • Process for the quantitative determination of the carbon of organic compounds in water
    Patent number: 4217108
    Abstract: In the determination of the quantity of carbon present in water in the form of organic compounds the carbon-containing water is first evaporated in the presence of oxygen at a temperature of about 900.degree. C. Care must be taken that the oxygen does not exceed 1 to 5 volume %, calculated on the quantity of steam. Then the CO.sub.2 content is measured with a CO.sub.2 analyzer. In a second step the carbon-containing water is measured without oxygen under identical conditions. The quantity of carbon present in water in the form of organic compounds is determined from the measured CO.sub.2 concentrations.
    Type: Grant
    Filed: March 13, 1979
    Date of Patent: August 12, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Werner Melzer, Dieter Jaenicke, Helmut Schroeder