Patents by Inventor Royal H. Sites

Royal H. Sites 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).

  • Method of making a temperature sensor
    Patent number: 5119538
    Abstract: A temperature sensor and fabrication technique for making the sensor. An insulating substrate supporting a conductive resistive pattern is laser trimmed until the pattern has a desired resistance. Back and forth movement of the laser is controlled at an automated laser trimming station. The laser trimmer compares the sensed resistance of the conductive resistance pattern with a sensor pattern that has already been precisely trimmed to a desired resistance and is used as a standard.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: June 9, 1992
    Assignee: Ranco Incorporated of Delaware
    Inventors: Lee A. White, Royal H. Sites
  • Temperature sensing apparatus and method of making same
    Patent number: 5043692
    Abstract: A temperature sensor. Two thick films resistor elements are mounted to a substrate and then a thermistor coupled to those elements to form a voltage divider. The resistance of the thermistor is determined at a reference temperature and the thick film resistor elements are precisely trimmed using a laser trimming system to produce a precision voltage divider. To sense temperatures the voltage divider is energized and its resistance ratio is sensed utilizing a bridge circuit.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: August 27, 1991
    Assignee: Ranco Incorporated of Delaware
    Inventors: Royal H. Sites, Richard R. Garcia
  • Temperature sensing apparatus and method of making same
    Patent number: 4881057
    Abstract: A temperature sensor. Two thick film resistor elements are mounted to a substrate and then a thermistor coupled to those elments to form a voltage divider. The resistance of the thermistor is determined at a reference temperature and the thick film resistor elements are precisely trimmed using a laser trimming system to produce a precision voltage divider. To sense temperatures the voltage divider is energized and its resistance ratio is sensed utilizing a bridge circuit.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: November 14, 1989
    Assignee: Ranco Incorporated
    Inventors: Richard R. Garcia, Royal H. Sites