Patents by Inventor Thomas A. Blawn

Thomas A. Blawn 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).

  • Patent number: 4036495
    Abstract: The essence of the invention resides in the positioning of a micro-switch on a cushion rod or its equivalent which reacts to the impact of a bowled ball against the cushion even when the ball impacts against the cushion very lightly. The light impact urges the closing of contacts in the micro-switch to energize a control circuit which commences the operation of a time delay means via a switch circuit so that a three second time delay is positively initiated before the cycling of the pinsetting machine takes place. The three second time delay occurs through an RC time constant in a electronic circuit and continues uninterrupted even if the bowled ball vibrates against the cushion.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: July 19, 1977
    Inventors: Thomas A. Blawn, James F. Blawn