Patents by Inventor David R. Maciorowski

David R. Maciorowski 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 for just-in-time updating of programming parts
    Publication number: 20030023962
    Abstract: The invention provides a method of implementing firmware updates to programmable parts within circuit boards on a manufacturing line. An image file of firmware for each of the parts is created and stored on a firmware server. The programmable parts are preferably integrated with the printed circuit boards; each of the boards networks to the firmware server by connection with an interface server, such that the image files download to the circuit board for programming the board's internal programmable parts. Networking between the parts and the firmware server can include communications across the Internet and/or one or more area networks. Multiple interface servers may be integral with the products incorporating the programmable parts so that many products may be updated concurrently.
    Type: Application
    Filed: July 30, 2001
    Publication date: January 30, 2003
    Inventors: Michael John Erickson, David R. Maciorowski, Christopher Shawn Kroeger
  • Push-pull auto transformer
    Patent number: 6404176
    Abstract: A DC-DC voltage converter comprises a controller, two switches, a transformer and two rectifying diodes. The transformer has a first winding, a second winding and a center tap. Input voltage in connected between the center tap and ground. An anode of each diode is connected to the outer ends of the two windings and the cathodes of the two diodes are connected together to provide a positive output with respect to ground. Each switch is connected between an outer end of one windings and ground. The controller generates control signals to turn the switches on and off for limited periods of time in phase opposition to alternately connect the outer ends of the first and second winding to ground to cause current to flow alternatively in one of the windings and induce a voltage in the other winding that is additive to the input voltage, thereby providing an output voltage greater than the input voltage.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: June 11, 2002
    Assignee: Hewlett-Packard Company
    Inventors: Bradley D. Winick, Robert B. Smith, David R. Maciorowski
  • Adaptive synchronous DC fan speed controller
    Patent number: 6381406
    Abstract: A method and apparatus for controlling the speed of a voltage-controlled fan by locking the pulse-width modulated speed control voltage to a tachometer signal of the fan is presented. By triggering the off time of the PWM pulse to the detection of the tachometer signal and ensuring the off time is less than one tachometer period, no phase and frequency information is lost.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: April 30, 2002
    Assignee: Hewlett-Packard Company
    Inventors: Robert B. Smith, David R. Maciorowski