Patents by Inventor Ludwig R. Siegl

Ludwig R. Siegl 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: 4643601
    Abstract: A ribbon positioning mechanism comprises a ribbon cartridge, a nosepiece, a stepper motor and flexible ribbon guides connecting the ribbon cartridge to the nosepiece. The nosepiece has two side members connected by a bridge, one of which has a downwardly extending leg. A rack located on the bottom of the leg engages a pinion attached to the stepper motor for lifting the nosepiece into a desired position. A ribbon, having a plurality of parallel color bands, passes from the ribbon cartridge via the flexible ribbon guides and through the nosepiece where it is aligned with a print head. The nosepiece freely slides on vertical guide posts attached to a print head carrier and printer logic controls the stepper motor to align the desired color band with the print head.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: February 17, 1987
    Assignee: International Business Machines Corporation
    Inventors: Dennis P. Nash, Donald K. Rex, Ludwig R. Siegl, Wendy Wussow
  • Patent number: 4441077
    Abstract: A real time tachometer is realized in an electromechanical device having a moving member, for example a disk, of nonmagnetic electrically conductive material driven by a suitable moving device, for example a rotating shaft, the velocity of which is to be determined. An assembly of at least one permanent magnet and at least one Hall effect device is arranged for inducing eddy currents in the moving member or rotating disk and measuring them for indicating the relative velocity. The placement and electric interconnection of the Hall effect devices measure the magnetic field provided by the magnet and in an alternate embodiment incorporate compensation for runout and adverse deflection with a rotating disk.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: April 3, 1984
    Assignee: International Business Machines
    Inventors: David F. Dodgen, Ludwig R. Siegl
  • Patent number: 4353298
    Abstract: A printer is provided with facilities for increasing the printing throughput. This involves a partial line turnaround operation. The printer has means to move a form or document past a print line, a ribbon drive assembly, and a print assembly incorporating a plurality of print wires arranged in print head groups, each group comprising a predetermined number of print wires. If, as an example, the print assembly has two, four, six, or eight print heads, each can accommodate eight wires in the embodiment described. The print wires are arranged in a slanted serrated pattern and provision is made herein to insure that the print heads move at least far enough to print their assigned character locations prior to the performance of any turnaround in individual lines being printed. Routine involves the accessing of tables stored in conjunction with a microprocessor, the tables indicating the optimum turnaround situations for the different print head configurations.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: October 12, 1982
    Assignee: International Business Machines Corporation
    Inventors: Gregory N. Baker, Willard B. Greene, Ludwig R. Siegl, Delbert C. Thomas, Jr., Charles J. Weber, Lee T. Zimmerman
  • Patent number: 4261039
    Abstract: A microprocessor controlled printer includes a forms feed assembly, a dot matrix print assembly, a ribbon drive assembly and a number of emitter assemblies associated with the foregoing to provide positional information during operation of the printer which prints on a line-by-line basis. During the printing of characters, such as Kanji characters, extremely accurate control of dot placement is required. In order to achieve a balance between the operating cycle times of the microprocessor and the forms feed assembly, the microprocessor analyzes emitter pulses in two stages. One stage involves use of relatively low frequency emitter pulses for start-up, normal speed, and high speed operations. Another stage involves use of an additional emitter track that produces high frequency pulses utilized by the microprocessor during stopping conditions to achieve greater precision in final positioning of the forms.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: April 7, 1981
    Assignee: International Business Machines Corporation
    Inventors: Gregory N. Baker, John E. Bateson, Earl T. Brown, Hortensia E. Delgado, Ludwig R. Siegl, Delbert C. Thomas, Jr.