Patents by Inventor Hugh S. Montgomery

Hugh S. Montgomery 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).

  • Peak current reduction in a cordless telephone handset
    Patent number: 6205343
    Abstract: A method and apparatus reduces the peak current drawn from a DC-to-DC voltage converter (126) in a battery powered communication device such as a radiotelephone handset (104). The radiotelephone handset (104) enters high current operating conditions during transmit time slots (208, 210) and receive time slots (212, 214) defined by a TDMA protocol. During the receive time slots (212, 214) and the transmit time slots (208, 210), operating power is removed from a portion of the communication device, such as the display (120), to reduce the peak current drawn from the voltage converter (126). Excessive current drain from the battery (124) and rapid battery discharge are thereby eliminated.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: March 20, 2001
    Assignee: Motorola, Inc.
    Inventor: Hugh S. Montgomery, Jr.
  • Bidirectional amplifier
    Patent number: 4758822
    Abstract: A bidirectional amplifier for use in a transmission line, that utilizes a pair of interconnected bridge circuits including isolation transformers and a pair of unidirectional amplifiers. The transmission in each direction uses a single amplifier to amplify the signal for a particular direction of transmission without effecting the other amplifier.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: July 19, 1988
    Assignee: GTE Communication Systems Corporation
    Inventors: Robert D. Greaby, Hugh S. Montgomery
  • Electronic hold release circuit
    Patent number: 4447674
    Abstract: In a hold circuit including a silicon controlled rectifier (SCR) normally turned on and connecting the hold circuit to a subscriber line, a first hold release circuit outputs a trigger signal to a transistor turning off the transistor and disconnecting a line seizing network. A second hold release circuit outputs a trigger signal to a second transistor responsive to the line seizing network being disconnected. The second transistor connects a load resistor across the SCR dropping the holding current flowing through the SCR causing it to turn off. The second hold release circuit is also arranged to output its trigger signal to the second transistor responsive to a pre-arranged timing interval.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: May 8, 1984
    Assignee: GTE Automatic Electric Inc.
    Inventors: Gary Grantland, Hugh S. Montgomery, Eduard F. B. Boeckmann, Larry A. Woodworth
  • Electronic hold circuit
    Patent number: 4440981
    Abstract: In a hold circuit connectable to a subscriber telephone line, a silicon controlled rectifier is turned on by a user operated momentary pushbutton connecting the positive side of the line to the hold circuit. A comparator circuit sensing the initial value of the loop voltage, turns on a transistor and connects a line seizing network across the subscriber line.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: April 3, 1984
    Assignee: GTE Automatic Electric Inc.
    Inventors: Gary Grantland, Hugh S. Montgomery, Eduard F. B. Boeckmann, Larry A. Woodworth