Snatch Roll Patents (Class 400/375)
  • Patent number: 4191483
    Abstract: A direct connection provides coupled movement from a keylever to an interposer of a simple key action in a typewriter. The connection includes an abutment integrally constructed on the keylever inserted within a recess on the interposer to effect movement of the interposer when the keylever is caused to move. Depression of the keylever pushes the interposer downward against a pawl that will engage a rotating power roll to cause initiation of a print movement of a typebar. The keylever while being restored by an underlying spring, will then pull the interposer upward to rest. The keylever and interposer are in planar alignment that is maintained by having the connection contained within a slot of a support member in the typewriter.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: March 4, 1980
    Assignee: SCM Corporation
    Inventor: Hans W. Mueller
  • Patent number: 4140407
    Abstract: A ribbon feed mechanism for a typewriter has a linkage for incrementally feeding a ribbon, a power roll rotated by a motor and a control member actuated by a printing mechanism for connecting the power roll to the linkage to incrementally feed the ribbon. The control member is also actuated by a carriage shift mechanism when shifting a carriage from an upper case position to a lower case position for connecting the power roll to the linkage to incrementally feed the ribbon.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: February 20, 1979
    Assignee: SCM Corporation
    Inventors: Richard F. Porterfield, Richard E. Shattuck