Patents by Inventor Douglas G. Arnold

Douglas G. Arnold 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: 6284990
    Abstract: A safety switch is provided to detect when a tube launched which exits the tube. The switch is located within the vehicle having a switch plunger extending to the periphery of the vehicle. The plunger is biased to provide outward pressure against a lever on the exterior of the vehicle. The lever rides within the bore of the launch tube such that, when the vehicle is within the launch tube, the lever contacts the interior bore of the tube. The lever contacting the tube bore prevents the plunger from extending to activate the switch. When the vehicle exits the tube, the lever is free to rotate away from the vehicle allowing the plunger to extend and activate the switch which may be a single or multi-pole switch.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: September 4, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Douglas G. Arnold, William A. Hardin, Michael J. Wroblewski