US PATENT SUBCLASS 400 / 398
.~ With accelerated (e.g., motion amplifying)type-bar action

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

383  DF  TYPE-BAR-ACTION MECHANISM OR TYPE-FACE ON TYPE-BAR OR TYPE-FACE INKER {19}
398.~ With accelerated (e.g., motion amplifying)type-bar action {9}
399  DF  .~.~> By rolling contact between links {1}
400  DF  .~.~> By cam-engaging link
401  DF  .~.~> By breaking and straightening toggle-linkages
402  DF  .~.~> By breaking toggle-linkage (e.g., to pull type-bar to print-point)
403  DF  .~.~> By straightening toggle-linkage (e.g., to push type-bar to print-point)
404  DF  .~.~> Including adjustment of toggle-linkage anchor position
405  DF  .~.~> By type-bar connecting link {1}
406  DF  .~.~> By pin and slot connection
407  DF  .~.~> Including type-bar starter means

DEFINITION

Classification: 400/398

With accelerated (e.g., motion amplifying) type-bar action:

(under subclass 383) Subject matter wherein significance is attributed mechanism that effects an increase in the rate of speed of a type-bar* as it moves from its rest position to its print-point* position, which mechanism includes a link or lever that pivots about a fulcrum that shifts relative to the link or lever as the type-bar moves.

(1) Note. It is, of course, inherent in any member that moves from a rest position to a second position that acceleration from zero velocity to a maximum velocity must occur during such movement, but most disclosures of type-bar-action mechanism are silent as to acceleration. In this and indented subclasses, the claimed disclosure of the patents therein emphasize the structure of the action that produces a type-bar movement which accelerates during all or part of its motion from its rest position to its print-point position.