Patents by Inventor Michael Steel Smyth

Michael Steel Smyth 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).

  • Method and apparatus for providing both power and communication over two wires between multiple low voltage AC devices
    Patent number: 6956463
    Abstract: A system master unit is connected to a 24V AC power source. One or more slave units is connected to the master unit by a power/communication line. Bulk capacitance in the master and slave units stores power during a power source positive half cycle. When the source voltage is higher than the bulk capacitance voltages, power is delivered to the loads, during which time communication cannot take place over the power/communication line. During the power source negative half cycle, the power/communication line is disconnected from the AC power source and is then used for communication between the master and slave units. System power is delivered from the energy stored in the bulk capacitance.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: October 18, 2005
    Assignee: Carrier Corporation
    Inventors: David Crenella, Michael Steel Smyth
  • Method and apparatus for providing both power and communication over two wires between multiple low voltage AC devices
    Publication number: 20040066245
    Abstract: A system master unit is connected to a 24V AC power source. One or more slave units is connected to the master unit by a power/communication line. Bulk capacitance in the master and slave units stores power during a power source positive half cycle. When the source voltage is higher than the bulk capacitance voltages, power is delivered to the loads, during which time communication cannot take place over the power/communication line. During the power source negative half cycle, the power/communication line is disconnected from the AC power source and is then used for communication between the master and slave units. System power is delivered from the energy stored in the bulk capacitance.
    Type: Application
    Filed: October 2, 2002
    Publication date: April 8, 2004
    Inventors: David Crenella, Michael Steel Smyth