Patents by Inventor Lewis I. Mendelsohn

Lewis I. Mendelsohn 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: 4448297
    Abstract: A sensing device determines whether the ferromagnetic properties of a standard acceptable coin are matched by a coin under test. The two are compared in a sensing device which consists of a pair of substantially identical sensing coils wound around tube chutes so that each coin becomes the core of its associated coil. The sensing coils are, in turn, placed within the windings of a larger exciting coil used to induce voltages in the sensing coils. All the coils are rectangular in shape and the coins are forced to remain in an endwise relationship within the sensing coils so that their planes are parallel to the axes of their associated coils. The sensing coils are connected in a series opposed relationship so as to be "bucking" one another. Their combined output is fed into suitable circuitry for determining whether this output goes to zero or a voltage near zero within acceptable limits. If it does, then the coin is accepted as valid. If not, the coin is rejected as invalid.
    Type: Grant
    Filed: June 18, 1981
    Date of Patent: May 15, 1984
    Inventor: Lewis I. Mendelsohn
  • Patent number: 4126287
    Abstract: A flexible electromagnetic shield is provided. The shield comprises interlaced filaments of at least one glassy metal alloy. The glassy alloy has a maximum permeability of at least about 25,000 and a coercivity of less than about 0.08 Oe.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: November 21, 1978
    Assignee: Allied Chemical Corporation
    Inventors: Lewis I. Mendelsohn, Ethan A. Nesbitt