Patents by Inventor Donald D. Ransom

Donald D. Ransom 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).

  • Positive mechanical lock-out device
    Patent number: 4025742
    Abstract: Sequential operation of a pair of switches in a required sequence of operation is ensured by means of a telescoping arrangement of tubes which are connected to associated ones of switch operating shafts. A positive stop prevents the movement of one telescoping member relative to the other out of sequential order.
    Type: Grant
    Filed: August 6, 1975
    Date of Patent: May 24, 1977
    Assignee: Allis-Chalmers Corporation
    Inventor: Donald D. Ransom