(under subclass 286) Subject matter wherein the brake includes (a) a device for producing lines of magnetic flux, and (b) an electrically conductive device disposed to cut the flux lines, one of the devices being stationary and the other rotatable with the spool to establish a braking force opposing rotation of the spool in the unwinding direction.
(1) Note. The use of a magnetic device solely to regulate the position of a friction brake would be classified elsewhere, e.g., subclasses 301 and 302.
SEE OR SEARCH THIS CLASS, SUBCLASS:
155, for a magnetic line tensioning device.
SEE OR SEARCH CLASS
188, Brakes,
267, for a similar brake in general use. 310, Electrical Generator or Motor Structure,
93, and 105+ for a hysteresis or eddy current device.
