US PATENT SUBCLASS 209 / 520
.~.~.~ Sensor responsive to item contact

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

509  DF  SORTING SPECIAL ITEMS, AND CERTAIN METHODS AND APPARATUS (E.G., POCKET TYPE AND LIGHT RESPONSIVE SORTING, ETC.) FOR SORTING ANY ITEMS {11}
517  DF  .~ Sorting lumber, logs, pipes, rails, or like items {2}
518  DF  .~.~ Condition responsive means controls separating means {2}
520.~.~.~ Sensor responsive to item contact

DEFINITION

Classification: 209/520

Sensor responsive to item contact:

(under subclass 518) Methods and apparatus wherein the sensing means responds to contact by an item, e.g., a switch engaged by an item of particular size.