US PATENT SUBCLASS 83 / 286
.~.~ Tool moved in response to work-sensing means


Current as of: June, 1999
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83 /   HD   CUTTING

284  DF  CUTTING MOTION OF TOOL HAS COMPONENT IN DIRECTION OF MOVING WORK {17}
285  DF  .~ With means to initiate intermittent tool action {2}
286.~.~ Tool moved in response to work-sensing means {4}
287  DF  .~.~.~> With means to vary "length" of product {1}
289  DF  .~.~.~> With photo-electric work-sensing means
290  DF  .~.~.~> With trip-switch work-sensing means {1}
293  DF  .~.~.~> With work-responsive means to initiate flying movement of tool {2}


DEFINITION

Classification: 83/286

(under subclass 285) Device provided with a detector* for work, a transmitter*, and means to initiate or effect a tool action as a direct or indirect result of the receipt by said means of a detected and transmitted signal or impulse.

(1) Note. For convenience in terminology, in this and indented subclasses, the compound movement of a flying tool will be referred to in terms of two components, one being the tool "flying movement" (defined in the Glossary for the class), and the other being the tool "feed movement)" (defined as that component of motion directed only toward the work, i.e., toward the other tool of a tool pair). The distinction between the named components is not an arbitrary one; in the schedule, and in the placement of patents, components are significant as to those patents which disclose separate actuating means to give the tool its respective flying and feed movements. Thus a patent to a rotary cutter of the "lawnmower" type (such as is found, per se, in subclasses 331+ below) and including work-responsive tool actuating means, will be found in a generic subclass such as 290 rather than in a subclass characterized by the type of feed or flying movement such as subclasses 291 or 292, respectively.

(2) Note. Included in this subclass (286) are patents disclosing tools revolving about a fixed axis (e.g., lawnmower type), which tools are actuated by a mechanically operating detector and transmitter. For similar structure wherein the detector is a photocell, see subclass 289; and wherein it is otherwise part of an electrical circuit, see subclasses 290+, indented hereunder.

(3) Note. For other subclasses providing for work-sensing

mechanism and control means responsive thereto, see subclasses 399+ under the heading "Search This Class, Subclass".

SEE OR SEARCH THIS CLASS, SUBCLASS:

308+, for patents in which the flying component of the tool's motion is derived entirely from the engagement of the tool with the moving work.