(under subclass 119) Devices provided with means to supply lubricant to the ring and/or the traveler. This subclass does not include patents disclosing the conventional lubrication wherein lubricant is manually smeared on the traveler contacting surface of the ring at intervals, but does include means which are inherently self lubricating.
(1) Note. Lubrication systems for ring groups are in Class 184, Lubrication, subclass 6 and indented subclasses.
