Patents by Inventor Robert Rollins

Robert Rollins 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).

  • Coil configuration for electronic coin tester and method of making
    Patent number: 4905814
    Abstract: A coil used in electronic coin testers for testing a coin for the purpose of accepting a valid coin or rejecting a counterfeit coin in a coin-operated vending machine, game, telephone or the like is disclosed. A coin slot is provided having two opposing longitudinal walls spaced to accommodate a coin therebetween of either the sample coin type or the test coin type. Within each longitudinal wall a planar looped coil is provided that, upon inducement of an electric current, generates lines of magnetic flux which are normal to the opposing surfaces of the longitudinal walls throughout the length of the longitudinal walls.
    Type: Grant
    Filed: August 16, 1988
    Date of Patent: March 6, 1990
    Assignee: Coin Mechanisms, Inc.
    Inventors: Donald Parker, Robert Rollins