Patents by Inventor Kwangling Chang

Kwangling Chang 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).

  • Numerical display module
    Patent number: 4796370
    Abstract: The relatively large size seven-segmented numerical display module consists of six peripheral segments having the same shape and size. Each segment is operated by a transmission mechanical gear assembly and a low voltage direct current motor. Only a low energy solar cell and/or battery is required to operate all the segments so as to provide a selected numerical display.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: January 10, 1989
    Inventor: Kwangling Chang
  • Automatic control system for automobile lights
    Patent number: 4665321
    Abstract: The control system is for automatic operation of vehicle lights. It has two distinct switching points corresponding to two predetermined ambient light levels. The first switching point is for turning on the vehicle lights such as after dusk. The second switching point is for turning off the vehicle lights such as after sun rise. The system is free of the chattering problem in common automatic light controls and it is not affected by slight variations in the ambient light condition. It is simple in structure and can be quickly and easily installed in a vehicle. The system includes a timer to delay its actuation momentarily when it is first energized so as to allow full current from the battery to be used for starting the engine. It also includes a temperature compensation to allow for ambient temperature variations.
    Type: Grant
    Filed: August 14, 1985
    Date of Patent: May 12, 1987
    Inventors: Kwangling Chang, Louis Imperio
  • Display element with back lighting
    Patent number: 4558529
    Abstract: A display element comprises a stator housing with a front aperture and a rotor electromagnetically rotatable to assume three or four rotary positions. At each rotary position a different area of the rotor is seen through the aperture. Two or three of the areas of the rotor are translucent. Apertures in the stator housing and registering apertures in the rotor allow the translucent areas to be illuminated by lighting placed to the rear of the stator housing.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: December 17, 1985
    Assignee: NEI Canada Limited
    Inventors: Kwangling Chang, Pankaj J. Dave
  • Display or indicating element with bent core
    Patent number: 4531318
    Abstract: A thin disk contrastingly colored on opposite sides is rotatably mounted to rotate about its diameter. A permanent magnet on the disk allows the disk to be driven by a pair of reversibly magnetizable cores. One of the cores is bent to provide a stop which limits the rotation of the disk in either direction. The two limiting positions correspond to the display of the contrastingly colored sides in the viewing direction.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: July 30, 1985
    Assignee: NEI Canada Limited
    Inventors: Kwangling Chang, Dalpat D. Mistry