Patents by Inventor Jack Y. C. Chen

Jack Y. C. Chen 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).

  • Infrared ray detector control illumination system
    Patent number: 4843283
    Abstract: An illumination control system has a plurality of infrared detection systems located in a plurality of adjacent scanning areas. Each of the detection systems controls the activation of light sources located in two or more scanning areas. Each of the detection systems is equipped with an infrared radiation sensor, an ambient light resistor, a timing circuit, a light source driving circuit, and a blinking condition prevention circuit.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: June 27, 1989
    Inventor: Jack Y. C. Chen
  • Timer controlled fire and burglar alarm system
    Patent number: 4785289
    Abstract: A timer controlled fire and burglar alarm system using an economical circuit design and battery for prolonged and effective functioning and includes a thermo-electric infrared sensor, a filter and an amplifier to detect signal, a plurality of time priority circuits, a time-delay circuit, a timer controlled alarm setting circuit and timers with time display for setting and disarming of an alert condition and/or driving peripheral devices so as to function as a fire alarm, a burglar alarm and a visitor detection system.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: November 15, 1988
    Inventor: Jack Y. C. Chen