Patents by Inventor William R. Sandman

William R. Sandman 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).

  • Emergency power supply
    Publication number: 20030205939
    Abstract: According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.
    Type: Application
    Filed: April 2, 2003
    Publication date: November 6, 2003
    Applicant: Electronic Design
    Inventors: Alexander C. Crosman, Thomas Schubert, William R. Sandman
  • Emergency power supply
    Publication number: 20020079742
    Abstract: According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.
    Type: Application
    Filed: February 28, 2002
    Publication date: June 27, 2002
    Applicant: Electronic Design
    Inventors: Alexander C. Crosman, Thomas Schubert, William R. Sandman
  • Emergency power supply
    Publication number: 20010015576
    Abstract: According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.
    Type: Application
    Filed: April 20, 2001
    Publication date: August 23, 2001
    Applicant: Electronic Design and Manufacturig, Inc.
    Inventors: Alexander C. Crosman, Thomas Schubert, William R. Sandman
  • Emergency power supply
    Patent number: 5834858
    Abstract: According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: November 10, 1998
    Assignee: Electronic Design & Manufacturing Inc.
    Inventors: Alexander C. Crosman, III, Thomas Schubert, William R. Sandman