Patents by Inventor David Legge

David Legge 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).

  • Q-switched laser system and method to prevent seeding from pre-lasing
    Patent number: 9373929
    Abstract: A method for preventing spatial or spectral beam seeding in a Q-switched laser is described. The Q-switch trigger of the laser is delayed by several laser resonator lifetimes after the end of the pump pulse. In this way, beam seeding is completely eliminated whilst pre-lase is maintained. The method described may be used for any laser system where the fall time of the pump radiation is sufficiently fast with respect to the upper state lifetime of the laser medium.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: June 21, 2016
    Assignee: SELEX ES LTD
    Inventor: David Legge
  • Optical parametric oscillator
    Patent number: 8867122
    Abstract: The present invention relates to an optical parametric oscillator. In particular, the present invention relates to a more optimal rotating image optical parametric oscillator. More specifically, there is described an optical parametric oscillator comprising six mirrored surfaces; wherein two of the mirrored surfaces are provided by a penta prism and the sequence of mirrors is operable to provide a predetermined rotation of a beam passing therethrough.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: October 21, 2014
    Assignee: Selex ES Ltd
    Inventors: John Barr, David Legge, John R. MacLean, Daniel H. Thorne, Jonathan Truby
  • Tube end milling head
    Patent number: 7938047
    Abstract: A tube end rotary milling head with cylindrical cutting pieces removably secured to the milling head by forces exerted by the material being cut and by friction without any separate securing elements.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: May 10, 2011
    Assignee: Esco Technologies, Inc.
    Inventor: David Legge
  • OPTICAL PARAMETRIC OSCILLATOR
    Publication number: 20100079851
    Abstract: The present invention relates to an optical parametric oscillator. In particular, the present invention relates to a more optimal rotating image optical parametric oscillator. More specifically, there is described an optical parametric oscillator comprising six mirrored surfaces; wherein two of the mirrored surfaces are provided by a penta prism and the sequence of mirrors is operable to provide a predetermined rotation of a beam passing therethrough.
    Type: Application
    Filed: December 17, 2007
    Publication date: April 1, 2010
    Applicant: Selex Sensors & Airborne Systems Limited
    Inventors: John Barr, David Legge, John R. MacLean, Daniel H. Thorne, Jonathan Truby
  • Tube end milling head
    Publication number: 20100074699
    Abstract: A tube end rotary milling head with cylindrical cutting pieces removably secured to the milling head by forces exerted by the material being cut and by friction without any separate securing elements.
    Type: Application
    Filed: November 25, 2009
    Publication date: March 25, 2010
    Inventor: David Legge
  • Tube end milling head
    Patent number: 7648313
    Abstract: A tube end rotary milling head with cylindrical cutting pieces removably secured to the milling head by forces exerted by the material being cut and by friction without any separate securing elements.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: January 19, 2010
    Assignee: Esco Technologies, Inc.
    Inventor: David Legge
  • Laser Arrangements and Methods
    Publication number: 20080291947
    Abstract: A method for preventing spatial or spectral beam seeding in a Q-switched laser is described. The Q-switch trigger of the laser is delayed by several laser resonator lifetimes after the end of the pump pulse. In this way, beam seeding is completely eliminated whilst pre-lase is maintained. The method described may be used for any laser system where the fall time of the pump radiation is sufficiently fast with respect to the upper state lifetime of the laser medium.
    Type: Application
    Filed: October 18, 2006
    Publication date: November 27, 2008
    Inventor: David Legge
  • Tube end milling head
    Publication number: 20080075552
    Abstract: A tube end rotary milling head with cylindrical cutting pieces removably secured to the milling head by forces exerted by the material being cut and by friction without any separate securing elements.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 27, 2008
    Inventor: David Legge