(under subclass 3.21) Apparatus under the class definition in which the mechanism for control of power includes a brake and a device described in (1) Note of ... of this class (192).
(1) Note. The term "brake" is intended to refer to that device classified, per se, in Class 188, Brakes. This subclass and this note are not intended to change the line between Class 188 and Class 192 involving brakes and clutches, in general. It should be further noted that Class 188 (particularly subclass 296) is the locus of patents to a "fluid brake", wherein the structure is superficially similar to a vortex-flow drive as described in (1) Note of subclass 3.21 above. However, in the disclosures found in Class 188 subclass 296, one of the elements is fixed to its supporting structure to retard rotation of the other element.
(2) Note. The line between this class (192) and Class 60, Power Plants is not intended to be changed as a result of the establishment of this subclass (3.34). This subclass (3.34) is intended as the locus of patents to a vortex-flow drive plus a brake applied to either the first or second shaft of such drive (as described in (1) Note of subclass 3.21). Class 60 particularly subclasses 330+ is intended as the locus of patents to a device similar to that described in that (1) Note, wherein a brake is applied to the additional, interposed element described in that (1) Note. (The interposed element is known in the art as a "reactor member").
