Patents by Inventor Christpher D. Jones

Christpher D. Jones 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).

  • Battery operated computer having improved battery monitor and cell reversal protection circuit
    Patent number: 5349668
    Abstract: A battery operated computer includes a battery having a plurality of serially connected banks of battery cells that are monitored during operation of the computer to detect a nearly depleted battery bank and a fully depleted battery bank. The computer also includes a plurality of microprocessors including a host or system processor, a service processor and a power subsystem processor. When a nearly depleted battery bank is detected, the power subsystem processor is interrupted and it sends a message to the service processor which in turn interrupts the host processor. An interrupt handler then powers down the system. When a fully depleted battery bank is detected, the battery is immediately disconnected and the system is shutoff to prevent polarity or cell reversal.
    Type: Grant
    Filed: April 15, 1992
    Date of Patent: September 20, 1994
    Assignee: International Business Machines
    Inventors: Leo A. Gladstein, Christpher D. Jones, James C. Wulf