Patents by Inventor John A. Rawson

John A. Rawson 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).

  • FLOW FORMING METHOD
    Publication number: 20150083284
    Abstract: A method of forming a shaped article. The method comprises providing a pre-form 40 comprising a chromium molybdenum vanadium steel alloy, heat treating the pre-form to obtain a surface hardness of between 420 and 480 according to the Vickers hardness test, and, subsequent to the heat treating step, flow forming the pre-form 40 to shape the pre-form.
    Type: Application
    Filed: September 3, 2014
    Publication date: March 26, 2015
    Inventors: Martin John RAWSON, John Harold BOSWELL, Martin TUFFS, George William WHITEHURST, Paul Owen HILL
  • Expanded micro cassette player-recorder
    Patent number: 5050021
    Abstract: A micro cassette recorder-player is disclsoed having capactity for increased signal-to-noise ratio by utilizing a mobile capstan which pulls tape out of a micro cassette and across an enlarged head placed distal to and shielded from all electric motors, solenoids, and inductors which typically create spurious electric and magentic flux fields that traditionally diminish S/N.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: September 17, 1991
    Assignee: Del Mar Avionics
    Inventors: Stephen K. Shu, John A. Rawson, Robert C. Beauchamp
  • Switching regulator control circuit
    Patent number: 4045887
    Abstract: A control circuit for a switching regulator comprised of silicon controlled rectifiers and inductive reactors is disclosed. The control circuit provides for fault detection and voltage regulation while using these output as control signals for a frequency variable gating mechanism to trigger the switching regulator so as to provide its maximum output capability.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: September 6, 1977
    Assignee: Honeywell Information Systems Inc.
    Inventor: John Rawson Nowell