Patents by Inventor Edwin J. Smith

Edwin J. Smith 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).

  • Sign readable at speed
    Patent number: 5165186
    Abstract: A sign having an array of elements each comprising a first lens, a second lens and an optical object in registry with the first and second lenses such that the virtual image of the optical object formed in the second lens lies in the focal surface of the first lens. The optical objects are a representation of the information which the sign is to present. The image of the optical objects seen by a viewer moving past the sign appears to be stationary with respect to the viewer.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: November 24, 1992
    Assignee: Cassel-Smith Limited
    Inventor: Edwin J. Smith
  • Paperboard sheet feeder
    Patent number: 4715596
    Abstract: A paperboard sheet feeder for feeding paperboard blanks to the feed rolls of processing equipment includes a support table and a pair of roller assemblies mounted on the support table. A drive includes gears connected to the roller assemblies through one-way clutches. A drive belt has ends secured to a slide block. The belt engages the gears. The slide block is mounted on guide bars for reciprocating movement. The drive belt, gears and one-way clutches convert reciprocating movement of the slide block into rotary movement of the roller assemblies. A source of vacuum communicates with the support table to draw a paperboard sheet into contact with the roller assemblies.
    Type: Grant
    Filed: April 23, 1986
    Date of Patent: December 29, 1987
    Assignee: Grant Machinery Inc.
    Inventors: Larry K. Cantrell, Edwin J. Smith
  • Method of producing metal strip having a galvanized coating on one side while preventing the formation of a zinc deposit on cathode means
    Patent number: 3988216
    Abstract: A method for producing galvanized metal sheet or strip material having a zinc coating on one side only. The method includes immersing a strip (zinc-coated on both sides) in an electrolyte and passing it between anode means and separate cathode means so as to remove a zinc coating from one side of the strip while simultaneously depositing a substantially equivalent amount of zinc on the opposite side of the strip. The cathode means is immersed in a separate caustic catholyte solution which is kept separate from the main electrolyte by an anion exchange membrane, supported at least partly within the electrolyte, so as to prevent migration of zinc ions from the main electrolyte to the catholyte and cathode means and the formation of a deposit on the cathode means. The method is most economically performed with a steel strip having a differential coating of zinc.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: October 26, 1976
    Assignee: National Steel Corporation
    Inventors: Lowell W. Austin, Edwin J. Smith, Leslie D. McGraw