Patents by Inventor Russell W. Boehm

Russell W. Boehm 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).

  • Method and apparatus for the injection molding of circuit boards
    Patent number: 4861534
    Abstract: A family of circuit boards are molded, each board having its own unique pattern of recessed circuit paths and component insertion through-holes. A different mold is provided for each different member of the family. The two cavity blocks of each mold cavity contain only the holes that are necessary to define the through-hole pattern for that member of the family. A plurality of core pins or wires are provided at the molding site. Only the core pins that are required by the mold in use at the molding site are rendered operative.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: August 29, 1989
    Assignee: International Business Machines Corporation
    Inventors: Russell W. Boehm, Rex A. Guinn, Hans J. Koerner
  • Mold protection device
    Patent number: 4515544
    Abstract: Sensor arranged to detect the proper placement and quantity of one or more inserts in the cavity of an injection molding machine. The sensor is preferably formed of a spring-biased plunger through one of the cavity shells. A photodetector monitors the movement of the plunger as the cavity-forming shells are closed and activates an alarm signal if the plunger movement is excessive before detection of proper mold closure.
    Type: Grant
    Filed: March 29, 1984
    Date of Patent: May 7, 1985
    Assignee: International Business Machines Corporation
    Inventors: Russell W. Boehm, Robert P. Rippstein, David R. Stone
  • Two-shot injection molding
    Patent number: 4460534
    Abstract: The complete, two-color, multiple keybutton array of a keyboard is molded by a two-shot injection molding method which uses a rotating, double female die means selectively cooperating with two male dies. The finished keybutton array is ejected to a carrier which then cooperates with a gathering fixture, which fixture is then movably adjusted to place the keybuttons in position for assembly to the keyboard.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: July 17, 1984
    Assignee: International Business Machines Corporation
    Inventors: Russell W. Boehm, William R. Keelen, Herbert Rees