Patents by Inventor Richard G. Chambers

Richard G. Chambers 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: 5904350
    Abstract: A method and apparatus for deskewing a sheet of media traveling through a paper path in a printer is provided. A buckle is formed in the sheet of media by over-driving the sheet into stationary deskew rollers that form a deskew nip downstream. A deskewing bias element includes a plurality of articulated segmented surfaces that contact the buckle and urge the leading edge of the sheet into the deskew nip. The buckle force combined with the biasing force from the deskewing bias element aligns the leading edge of the sheet with the deskew nip across the full width of the sheet, thereby removing any skew.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: May 18, 1999
    Assignee: Tektronix, Inc.
    Inventors: Charles D. Creighton, Nathan E. Hult, Richard G. Chambers, Clark W. Crawford, Mark A. Telander, Donald B. MacLane
  • Patent number: 5820275
    Abstract: A process motor (82) provides bidirectional motive force to a printer (50) drive train (80) that selectively engages with multiple self-homing printing functions. A print head (52) is tiltable to a maintenance position and a transfer roller (64) is loadable against a transfer drum (54) by respective missing tooth gear (96, 160) latching mechanisms. A print media pick roller (122) and transfer drum maintaining devices (70, 72) are actuated by spring-wrap clutches (114, 236) that are protected from reverse rotation by a one-way clutch (106). Print media transport rollers (140, 142) are selectively engaged with the one-way clutch by an electro-mechanical clutch (128). A picked and transported print medium (56) receives an ink image from the transfer drum and is stripped therefrom by stripper fingers (66) and directed into media exit rollers (212, 220) for delivery to a media output tray (68).
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: October 13, 1998
    Assignee: Tektronix, Inc.
    Inventors: Timothy L. Crawford, James D. Rise, Barry D. Reeves, Nathan E. Hult, William Y. Pong, Richard G. Chambers, Michael E. Jones
  • Patent number: 5619240
    Abstract: A media sensing system monitors the movement of media along the media pathway (76) as a sheet of printing medium (56) is transported through the printer 50. The media sensing system permits a hand fed sheet of printing medium (56) to be detected by a sensor (302) and signal to be sent to inactivate a print media pick roller (122) that automatically feeds print media. The sensing system senses the transport of print media (56) by print media transport rollers (140, 142) detecting media sheet size, activates the transfer process of an image from the liquid intermediate transfer surface on the transfer drum (54) to a sheet of print medium (56) after pausing the sheet of print medium to synchronize its movement along the media pathway with the imaging process, and activating the preheater (60) to heat the print medium (56) prior to image transfer and fusing. The sensing system senses the exit of the print medium (56) from the media exit rollers (212, 220) for delivery to an output tray (68).
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: April 8, 1997
    Assignee: Tektronix, Inc.
    Inventors: William Y. Pong, Richard G. Chambers, James D. Rise
  • Patent number: 5442387
    Abstract: A triggerable ink transfer system that simultaneously transfers ink from a plurality of ink preload chambers to corresponding load chambers and ink reservoirs is disclosed. The delivery system permits an untrained operator to safely load ink without inadvertently interchanging different types (e.g. colors) of ink, and without inadvertently overfilling any of the ink reservoirs. A processing unit that coordinates ink delivery system monitoring and control features is in communication with an operator interface unit that provides ink loading instructions to the operator.
    Type: Grant
    Filed: June 23, 1993
    Date of Patent: August 15, 1995
    Assignee: Tektronix, Inc.
    Inventors: Donald I. Loofbourow, Richard G. Chambers
  • Patent number: 5223860
    Abstract: A triggerable ink transfer system that simultaneously transfers ink from a plurality of ink preload chambers to corresponding load chambers and ink reservoirs is disclosed. The delivery system permits an untrained operator to safely load ink without inadvertently interchanging different types (e.g. colors) of ink, and without inadvertently overfilling any of the ink reservoirs. A processing unit that coordinates ink delivery system monitoring and control features is in communication with an operator interface unit that provides ink loading instructions to the operator.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: June 29, 1993
    Assignee: Tektronix, Inc.
    Inventors: Donald I. Loofbourow, Richard G. Chambers
  • Patent number: 5202622
    Abstract: A test fixture for a high pin count surface mounted IC device has a test head assembly connected to an adapter having electrically conductive elements that couple the output of the IC device to test points on the test head assembly. The test points are coupled to conductive pads on the test head assembly via conductive runs. The test head assembly conductive pads mate with conductive pad formed in the electrically conductive elements of the adapter. The conductive elements engage leads on the IC device providing conductive paths between the IC leads an the test points on the test head assembly. The test fixture is secured to the IC device by friction forces between the periphery of the IC device and the inner surface of the adapter. The test fixture or the adapter is usable as a low profile chip carrier by inverting the fixture or adapter and as a circuit board interconnect.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: April 13, 1993
    Assignee: Tektronix, Inc.
    Inventors: Paul A. Cole, Bozidar Janko, Richard G. Chambers, Wolfgang H. Herr, Douglas W. Trobough, Peter M. Compton
  • Patent number: 5166609
    Abstract: A test fixture for a high pin count surface mounted IC device has a test head assembly connected to an adapter having electrically conductive elements that couple the output of the IC device to test points on the test head assembly. The test points are coupled to conductive pads on the test head assembly via conductive runs. The test head assembly conductive pads mate with conductive pad formed in the electrically conductive elements of the adapter. The conductive elements engage leads on the IC device providing conductive paths between the IC leads an the test points on the test head assembly. The test fixture is secured to the IC device by friction forces between the periphery of the IC device and the inner surface of the adapter. The test fixture or the adapter is usable as a low profile chip carrier by inverting the fixture or adapter and as a circuit board interconnect.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: November 24, 1992
    Assignee: Tektronix, Inc.
    Inventors: Paul A. Cole, Bozidar Janko, Richard G. Chambers, Wolfgang H. Herr, Douglas W. Trobough, Peter M. Compton
  • Patent number: D268252
    Type: Grant
    Filed: November 20, 1980
    Date of Patent: March 15, 1983
    Assignee: Eaton Corporation
    Inventor: Richard G. Chambers
  • Patent number: D371157
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: June 25, 1996
    Assignee: Tektronix, Inc.
    Inventor: Richard G. Chambers
  • Patent number: D403350
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: December 29, 1998
    Assignee: Tektronix, Inc.
    Inventors: Richard G. Chambers, Greg Hinzmann