(under subclass 34) Subject matter in which one or more electric motors, hereinafter referred to as "work" motors, are arranged to actuate means for producing relative motion between: (1) a thing to be treated, traversed or operated on, hereinafter referred to as the "work", and (2), a tool, or traversing or operating mechanism, hereinafter referred to as the "tool", the tool being adapted to perform some work or operation on or with respect to the work, combined with one or more other electric motors, hereinafter referred to as the "feed" or "indexing" motors, arranged to control; (3) the rate of feed of the "work" to the "tool" or vice versa, or (4) the position of the "tool", spacially or angularly, relative to the path of movement of the work or the tool whichever is driven by the work motor.
(1) Note. In accordance with the class definition, when the work and feed motor combination is limited to actuating particular driven devices, classification will not be in this
subclass (39) but will be classified in some other class. See Lines With Other Classes and Within This Class. Inclusion of the devices operated by the motors by name only, such as a "reciprocating table", or "a carriage", a "movable tool holder" where no significant structure of the machine operated by the motors, will not be sufficient to exclude the patent from this subclass. When, however, the motors are claimed as being related as work and feed or indexing motors with respect to each other and their operations are related to each other, classification will be in this subclass. Designation of the motors as "work" and "feed" or "indexing" motors is sufficient basis for classification herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3+, for motor systems having particular load devices, see subclass 4 where the motors drive a plurality of load devices, and subclass 8 for plural motor drives for a single particular load device.
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29, Metal Working, work and feed motor arrangements are found throughout the class, particularly note 33+, for combined machines employing work and feed motor combinations.
408, Cutting by Use of Rotating Axially Moving Tool,
5+, 8+ and 14+ for the combination of a drilling machine of that class type with a control means actuated by an external stimulus.
409, Gear Cutting, Milling, or Planing, especially
10+, 50+, 75+, 79+, 183+, 185+, 332, and 339+ for a work feed motor arrangement in combination with a gear cutting machine.
451, Abrading, cork and feed motor arrangements are found throughout the class, most being found in
