Patents by Inventor William R. Harmon, Jr.

William R. Harmon, Jr. 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).

  • Telephone ringing signal generator
    Patent number: 4436960
    Abstract: An AC-AC line current reversal technique is employed for generating a telephone ringing signal. Generation of the signal is accomplished by controllably activating one of two series full wave rectification circuits responsive to a transformer coupled AC signal during alternate periods at a rate substantially equal to a desired ringing signal frequency.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: March 13, 1984
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: William R. Harmon, Jr.
  • Telephone ringing signal generator
    Patent number: 4415961
    Abstract: A waveform generator (FIG. 1) contains a static energy storage device circuit in which storage devices (C1 through C6) are interconnected in a fixed topological configuration. The storage device circuit has a plurality of input and output terminals (12 through 18). Charge storage is accomplished by controllably steering (20, 40) a supplied DC signal (10a,b) to a selected one, or selected ones, of the storage devices via the appropriate input terminals. AC waveforms are generated (11a,b) by controllably selecting (30, 40), in predetermined sequence, each output terminal of the storage device circuit.
    Type: Grant
    Filed: August 26, 1981
    Date of Patent: November 15, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: William R. Harmon, Jr.