Patents Assigned to Plastoform Industries Ltd
  • Publication number: 20110044491
    Abstract: An audio loudspeaker with an internal magnet geometry motor having a slotted cylinder having closed ends, a pair of oppositely charged magnets sandwiching a top plate and disposed between the closed ends of the cylinder, and a diaphragm assembly having a bobbin with spokes which extend through the slots. Mechanically connecting to the voice coil radially through the cylinder enables the lower suspension component to be places much lower and farther from the upper suspension component, improving stability of the suspension. The closed ends of the motor provide extremely low magnetic reluctance for the magnetic circuits at the respective ends of the motor.
    Type: Application
    Filed: August 23, 2009
    Publication date: February 24, 2011
    Applicant: Plastoform Industries Ltd.
    Inventors: Edward Ku, Richard Louis Weisman, Chun Hua Li
  • Patent number: 7625213
    Abstract: Magnetic means for detachably and rotatably connecting components in an audio speaker system which comprises a transmitter module securely disposed in a power and/or signal source of the audio system and a corresponding receiver module securely disposed in a power and/or signal receiving means of the audio system, each of the transmitter module and the receiver module comprises a ring-shaped magnetic body, a first electrically insulated layer, a conductive pin, a conductive plate, a second magnetically insulated layer and a bracket, wherein the transmitter module has a first polarity at the front wall of the magnetic body thereof and a second polarity opposite to the first polarity at a front end of the bracket thereof, and the receiver module has the second polarity at the front wall of the magnetic body thereof and the first polarity at a front end of the bracket thereof, and the magnetic body and the bracket of the transmitter module have the same diameter as those of the receiver module, so that when the
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: December 1, 2009
    Assignee: Plastoform Industries Ltd.
    Inventor: Kin Man Michael Tse
  • Publication number: 20050207603
    Abstract: A speaker includes a main housing, a pair of extension housings extending telescopically from respective opposed ends of the main housing and each having two speaker drivers therein that are concealed by the main housing when the extension housings are retracted and exposed when the extension housings are extended.
    Type: Application
    Filed: March 9, 2005
    Publication date: September 22, 2005
    Applicant: Plastoform Industries Ltd.
    Inventor: Kin Tse
  • Patent number: D557686
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: December 18, 2007
    Assignee: Plastoform Industries Ltd
    Inventor: Kin Man Tse
  • Patent number: D579001
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: October 21, 2008
    Assignee: Plastoform Industries Ltd.
    Inventor: Marcus Gabrielsson
  • Patent number: D593539
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: June 2, 2009
    Assignee: Plastoform Industries Ltd.
    Inventor: Kin Man Tse