Patents by Inventor John V. Seals

John V. Seals 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).

  • Elevator testing system
    Patent number: 4002973
    Abstract: A testing system is removably connected to a control of an elevator system and selectively operated to perform a plurality of testing sequences. The testing system is removably connected with a closed loop elevator control and selectively and independently provides a number of artificial control signals characteristic of an operating condition for controlling the operation of the elevator system under test. The testing system may be used in a testing sequence with elevator systems employing gated rectifying circuits to accurately monitor gate pulses and other operating functions therein.
    Type: Grant
    Filed: December 23, 1975
    Date of Patent: January 11, 1977
    Assignee: Armor Elevator Company
    Inventors: Theodore O. Wiesendanger, John V. Seals