Multiple-shift Mechanism (i.e., For Type-bar Having Three Or More Type Faces Thereon) Patents (Class 400/261)
For shifting type-bar-segment (Class 400/262)
For shifting type-bar or type-face on type-bar (Class 400/263)
  • Typewriter with improved case shift means
    Patent number: 4204780
    Abstract: In a typewriter of the kind having a carriage movable vertically relative to the type bar assembly to provide three cases of type, the carriage rests on a shift member slidable vertically in guides formed in the body of the typewriter and a spring acts between the body and the shift member biassing the shift member to an intermediate position. One shift key moves the shift member to a lowermost position, overcoming the spring bias, and a second shift key moves the shift member to an uppermost position, overcoming the weight of the carriage.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: May 27, 1980
    Assignee: Dobson Park Industries, Limited
    Inventor: Anthony Elliott