US PATENT SUBCLASS 400 / 440.1
.~.~.~ Compression spring


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}
436  DF  .~ Type-bar return spring connected to type-bar-action linkage {4}
440  DF  .~.~ Attached to key lever (e.g., tension spring) {2}
440.1.~.~.~ Compression spring


DEFINITION

Classification: 400/440.1

Compression spring:

(under subclass 440) Subject matter wherein the resilient or yieldable means is a component that exerts a returning force when the opposite ends thereof are pushed together.