US PATENT SUBCLASS 400 / 270.2
.~.~.~ Including ball-bearing support

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

251  DF  CASE-SHIFT MECHANISM {14}
268  DF  .~ For shifting type-face or type-bar {2}
270  DF  .~.~ Mounted on type-bar support (e.g., guide pin, type-bar-segment, etc.) {3}
270.2.~.~.~ Including ball-bearing support

DEFINITION

Classification: 400/270.2

Including ball-bearing support:

(under subclass 270) Subject matter wherein said structure includes a mechanical assemblage known as a "ball bearing" to which the type-bar* members are connected for movement.

(1) Note. A ball bearing is a device in which a shaft or journal turns upon a number of balls running in an annular track.