Patents Assigned to Concavex Plastic Works Limited
  • Retractable magnifier with an electric lamp
    Patent number: 6822813
    Abstract: A retractable magnifier includes a housing and a lens assembly having a lens carried in a frame. The lens assembly is movable in the housing between a retracted position and an extended position. The housing is provided with push-buttons capable of releasing the lens assembly from the retracted position. A longitudinal rack is formed in the housing. A pinion meshes the rack and has a spindle rotatably connected to the frame. The pinion further includes a helical torsion spring mounted around the spindle and placed in damping oil for urging the pinion in such a direction that the frame may be moved, in a gentle manner, to the extended position. A rocker provided with an electric prefocus lamp is pivotally connected to the housing, and adapted to be pivoted outward at a predetermined angle with the housing when the lens assembly is in the extended position. A switch is formed on the housing for turning on/off the lamp.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: November 23, 2004
    Assignee: Concavex Plastic Works Limited
    Inventor: Shiu-fai Jim
  • RETRACTABLE MAGNIFIER WITH AN ELECTRIC LAMP
    Publication number: 20040207935
    Abstract: A retractable magnifier includes a housing and a lens assembly having a lens carried in a frame. The lens assembly is movable in the housing between a retracted position and an extended position. The housing is provided with push-buttons capable of releasing the lens assembly from the retracted position. A longitudinal rack is formed in the housing. A pinion meshes the rack and has a spindle rotatably connected to the frame. The pinion further includes a helical torsion spring mounted around the spindle and placed in damping oil for urging the pinion in such a direction that the frame may be moved, in a gentle manner, to the extended position. A rocker provided with an electric prefocus lamp is pivotally connected to the housing, and adapted to be pivoted outward at a predetermined angle with the housing when the lens assembly is in the extended position. A switch is formed on the housing for turning on/off the lamp.
    Type: Application
    Filed: November 3, 2003
    Publication date: October 21, 2004
    Applicant: Concavex Plastic Works Limited
    Inventor: Shiu-fai Jim
  • Retractable magnifier with an electric lamp
    Patent number: D553273
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: October 16, 2007
    Assignee: Concavex Plastic Works Limited
    Inventor: Shiu-fai Jim
  • Retractable magnifier with an electric lamp
    Patent number: D494692
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: August 17, 2004
    Assignee: Concavex Plastic Works Limited
    Inventor: Shiu-fai Jim
  • Rimless light-emitting diode magnifier
    Patent number: D589071
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: March 24, 2009
    Assignee: Concavex Plastic Works Limited
    Inventor: Shiu-fai Jim
  • LED pullout magnifier
    Patent number: D594496
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: June 16, 2009
    Assignee: Concavex Plastic Works Limited
    Inventor: Shiu-fai Jim
  • Magnifying glass
    Patent number: D416927
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: November 23, 1999
    Assignee: Concavex Plastic Works Limited
    Inventor: Frankie S.F. Jim