Patents Assigned to The Lewis Engineering Company
  • Patent number: 4415855
    Abstract: An electrical indicator device for providing simultaneous relatively coarse analog, and higher-resolution, digital readings of a particular electrical parameter, all in one instrument. The device includes either a d'Arsonval meter movement or a servo-motor or other motivated electro-responsive device which carries a pointer movable over a predetermined portion of a calibrated meter scale plate, and a liquid crystal display having multiple digits, each digit being constituted of multiple segments. The segments are disposed completely within the confines of the meter scale plate, but lie substantially completely outside of the said predetermined portion thereof. The display is driven or energized by a digital voltmeter having its terminals connected to receive and monitor the same parameter that is being measured by the motivated electro-responsive device.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: November 15, 1983
    Assignee: The Lewis Engineering Company
    Inventor: Thomas A. Dubauskas
  • Patent number: 4258317
    Abstract: An electrical indicator device for providing simultaneous relatively coarse analog, and higher-resolution, digital readings of a particular electrical parameter, all in one instrument. The device includes a d'Arsonval meter movement which carries a pointer movable over a predetermined portion of a calibrated meter scale plate, and a liquid crystal display having multiple digits, each digit being constituted of multiple segments. The segments are disposed completely within the confines of the meter scale plate, but lie substantially completely outside of the said predetermined portion thereof. The display is driven or energized by a digital voltmeter having its terminals connected to receive and monitor the same parameter that is being measured by the d'Arsonval movement. The arrangement is such that the individual segments of the digital display are always completely visible regardless of the position which the pointer occupies with respect to the said predetermined portion of the scale plate.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: March 24, 1981
    Assignee: The Lewis Engineering Company
    Inventor: Thomas A. Dubauskas