Patents by Inventor John B. Stevens

John B. Stevens 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).

  • Microprocessor controlled, accelerometer based guitar pickup switching system
    Patent number: 8642876
    Abstract: An apparatus and method for selecting combinations of pickups on a guitar or other stringed instrument allows a performer to control the pickup selections without interrupting instrument play. Combinations of pickups are selected by a processor according to measurements of orientation, position, and/or rate of movement made by an accelerometer. The accelerometer measurements can be filtered. Any or all elements of the system can be contained in a hollow space within the instrument. A manual control can be included to override the processor. Pickup combinations and/or accelerometer measurement ranges can be specified by manual controls while in a training mode. In a sequential mode, pickup combinations are selected in a preset order and for preset time periods. The accelerometer sampling rate can be between 1000 and 100 samples per second, and the sampled data can be stored in an 11 by 11 array.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: February 4, 2014
    Assignee: Rockerswitch LLC
    Inventors: Leonard A. DeRoche, Paul J. Schwab, Nelson Spike Jones, Gerald Griffin, John B. Stevens
  • MICROPROCESSOR CONTROLLED, ACCELEROMETER BASED GUITAR PICKUP SWITCHING SYSTEM
    Publication number: 20120210849
    Abstract: An apparatus and method for selecting combinations of pickups on a guitar or other stringed instrument allows a performer to control the pickup selections without interrupting instrument play. Combinations of pickups are selected by a processor according to measurements of orientation, position, and/or rate of movement made by an accelerometer. The accelerometer measurements can be filtered. Any or all elements of the system can be contained in a hollow space within the instrument. A manual control can be included to override the processor. Pickup combinations and/or accelerometer measurement ranges can be specified by manual controls while in a training mode. In a sequential mode, pickup combinations are selected in a preset order and for preset time periods. The accelerometer sampling rate can be between 1000 and 100 samples per second, and the sampled data can be stored in an 11 by 11 array.
    Type: Application
    Filed: February 15, 2012
    Publication date: August 23, 2012
    Applicant: ROCKERSWITCH, LLC
    Inventors: Leonard A. DeRoche, Paul J. Schwab, Nelson Spike Jones, Gerald Griffin, John B. Stevens
  • Chemical recovery apparatus
    Patent number: 4278502
    Abstract: Apparatus for purifying liquid including a container for the liquid, means for heating the liquid when in the container to vaporize the liquid, means for cooling the vapor to form a condensate and a collector for collecting the condensate, the heating means comprising a condenser of a refrigerant circulatory systems and the cooling means comprising an evaporator of the system so that refrigerant liquified in the condenser gives off heat to heat the said liquid and evaporation of the liquid in the evaporator causes heat to be absorbed from the vapor thereby cooling the vapor to for the condensate.
    Type: Grant
    Filed: November 27, 1979
    Date of Patent: July 14, 1981
    Inventors: Christopher Stevens, John B. Stevens