Patents by Inventor Andreas Petzold

Andreas Petzold 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).

  • Method of optically measuring black carbon in the atmosphere and apparatus for carrying out the method
    Patent number: 7038765
    Abstract: For optically measuring black carbon in the atmosphere an aerosol particle collection area of a filter tape is continually illuminated by an illumination source with light of one or more wavelengths. Transmitted and reflected light fractions are measured at several precisely defined angles or angle ranges, such as of 0°, 120 to 140° and 165° to 180° by photodetectors arranged correspondingly relative to the illumination source, achieving maximum symmetry for the angles to be measured. The loading of the filter tape collection area with light absorbing aerosol material is continually determined from the change in the optical properties of the collection area with the aid of known algorithms from transmissivities and reflectivities as detected.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: May 2, 2006
    Assignees: Deutsches Zentrum für Luft- und Raumfahet e.V., ESM Andersen Instruments GmbH
    Inventors: Andreas Petzold, Markus Schönlinner
  • Method of optically measuring black carbon in the atmosphere and apparatus for carrying out the method
    Publication number: 20040156036
    Abstract: For optically measuring black carbon in the atmosphere an aerosol particle collection area of a filter tape is continually illuminated by an illumination source with light of one or more wavelengths. Transmitted and reflected light fractions are measured at several precisely defined angles or angle ranges, such as of 0°, 12° to 140° and 165 to 180° by means of photodetectors arranged correspondingly relative to the illumination source, achieving maximum symmetry for the angles to be measured. The loading of the filter tape collection area with light absorbing aerosol material is continually determined from the change in the optical properties of the collection area with the aid of known algorithms from transmissivities and reflectivities as detected.
    Type: Application
    Filed: August 22, 2003
    Publication date: August 12, 2004
    Applicants: DEUTSCHES ZENTRUM FUR LUFT UND RAUMFAHRT E.V., ESM ANDERSEN INSTRUMENTS GmbH
    Inventors: Andreas Petzold, Markus Schonlinner
  • Material sensing means for sewing machines
    Patent number: 4342273
    Abstract: A device for monitoring the passage of workpiece ends through a sewing machine. The device includes a photosensitive apparatus adapted to produce a signal in response to the passage of the workpiece ends past the end of a fiber optic light source.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: August 3, 1982
    Assignee: Union Special G.m.b.H.
    Inventor: W. Andreas Petzold
  • Strip severing mechanism for sewing machines
    Patent number: 4335666
    Abstract: A sewing machine having a scissor-like cutting device for severing a continuous strip of tape or the like immediately subsequent to its exit from beneath the presser foot assembly of the machine. The operation of the cutting device is influenced by a control system which includes a fiber optic light source for detecting the passage of work through the sewing area of the machine.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: June 22, 1982
    Assignee: Union Special G.m.b.H.
    Inventors: Konstantin H. Schwaab, W. Andreas Petzold, Werner A. Glockle