Patents by Inventor Theodore W. Wagner

Theodore W. Wagner 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).

  • Patent number: 4897871
    Abstract: A transformerless hybrid circuit arrangement for a subscriber line interface circuit of a telecommunications exchange is disclosed. A preferred embodiment of the hybrid arrangement comprises a first and a second operational amplifier plus a differential amplifier connected together in the following manner: The non-inverting input of the first operational amplifier is connected to a first reference voltage and the output of this amplifier is connected (1) via a first resistor to one wire of the two-wire subscriber line, and (2) via a third resistor to the inverting input of the amplifier. The non-inverting input of the second operational amplifier is connected to a second reference voltage and to the receiving branch of the four-wire line of the telecommunications exchange.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: January 30, 1990
    Assignee: Siemens Corporation
    Inventors: Morris L. Minch, Theodore W. Wagner
  • Patent number: 4682356
    Abstract: A transformerless hybrid circuit arrangement for a subscriber line interface circuit of a telecommunications exchange is disclosed. A preferred embodiment of the hybrid arrangement comprises a first and a second operational amplifier plus a differential amplifier connected together in the following manner: The non-inverting input of the first operational amplifier is connected to a first reference voltage and the output of this amplifier is connected (1) via a first resistor to one wire of the two-wire subscriber line, and (2) via a third resistor to the inverting input of the amplifier. The non-inverting input of the second operational amplifier is connected to a second reference voltage and to the receiving branch of the four-wire line of the telecommunications exchange.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: July 21, 1987
    Assignee: Siemens Corporation
    Inventors: Morris L. Minch, Theodore W. Wagner
  • Patent number: 4485277
    Abstract: A transformerless hybrid circuit arrangement for a subscriber line interface circuit of a telecommunications exchange is disclosed. A preferred embodiment of the hybrid arrangement comprises a first and a second operational amplifier plus a differential amplifier connected together in the following manner: The non-inverting input of the first operational amplifier is connected to a first reference voltage and the output of this amplifier is connected (1) via a first resistor to one wire of the two-wire subscriber line, and (2) via a third resistor to the inverting input of the amplifier. The non-inverting input of the second operational amplifier is connected to a second reference voltage and to the receiving branch of the four-wire line of the telecommunications exchange.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: November 27, 1984
    Assignee: Siemens Corporation
    Inventors: Morris L. Minch, Theodore W. Wagner
  • Patent number: 4396805
    Abstract: A ring trip detector for a subscriber line interface circuit which couples a two-wire subscriber line with the transmitting and receiving branches, respectively, of a four-wire line in a telecommunication exchange. The subscriber line interface circuit includes a two-to-four wire hybrid circuit having an off-hook detector; a ring generator for producing an AC ring voltage of given frequency for ringing a subscriber set connected to the subscriber line; and a ring relay for selectively connecting the hybrid circuit to the subscriber line when in a first position and connecting the ring generator to the subscriber line when in a second position.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: August 2, 1983
    Assignee: Siemens Corporation
    Inventor: Theodore W. Wagner
  • Patent number: 4389544
    Abstract: Digital telephone apparatus suitable for use as a subscriber station as well as for an attendant console. The telephone apparatus is connectable for full duplex communication with a four wire telephone transmission line. The telephone apparatus is capable of transmitting PCM speech data and/or digital data from a digital data interface to a peripheral data system. The telephone apparatus comprises an internal data bus to which are connected a digital transceiver, a sync/signalling generator, a serial frame synchronizer and at least one codec/PCM filter. The transceiver transmits and receives digital data to and from the telephone transmission line. The sync/signalling generator repeatedly supplies an 8 bit first data word to the internal data bus containing a binary synchronizing code and a signalling code. Simultaneously, the serial frame synchronizer repeatedly receives from the data bus and decodes an 8 bit first data word containing a synchronizing code and a signalling code.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: June 21, 1983
    Assignees: Siemens Corporation, Siemens Corporation
    Inventors: Theodore W. Wagner, Sam Liang, Deepak R. Muzumdar
  • Patent number: 4375584
    Abstract: A modular telephone keyset instrument is arranged within a rectangular casing having indentations in the top for receiving a telephone handset. Electrical (electronic) circuits are provided on a mother PC board, a daughter PC board and a key switch PC board, stacked within the housing from bottom to top, respectively. The daughter and keyset PC boards are connected to the mother PC board by ribbon cables. A hook switch, mounted on and attached to the daughter PC board extends through one of the indentations in the top to sense whether the telephone handset is placed in the indentations.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: March 1, 1983
    Assignee: Siemens Corporation
    Inventors: Deepak Muzumdar, William Levine, Gerry Suarez, Rolf Schneider, Theodore W. Wagner