US PATENT SUBCLASS 242 / 574
.~.~.~ Shiftable linkage


Current as of: June, 1999
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242 /   HD   WINDING, TENSIONING, OR GUIDING

570  DF  COIL HOLDER OR SUPPORT (E.G., SPINDLE, DISPENSER, OR SPOOL) {6}
571  DF  .~ Radially expansible or contractile {8}
572  DF  .~.~ Longitudinally shiftable operator {2}
574.~.~.~ Shiftable linkage {4}
574.1  DF  .~.~.~.~> Parallelogram
574.2  DF  .~.~.~.~> Mutually pivoted (e.g., lazy tong type)
574.3  DF  .~.~.~.~> Trapezoidal
574.4  DF  .~.~.~.~> Center actuated, pivoted linkage (e.g., umbrella type)


DEFINITION

Classification: 242/574

Shiftable linkage:

(under subclass 572) Subject matter wherein the shiftable means includes an axially movable input member and elongated coupling means adapted to transfer the axial movement of the input member to radial movement of a spindle surface element by which a circumferential dimension of the spindle is varied.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

469+, for a control lever or linkage system of general use.