Piston ringing apparatus.

摘要

Piston-ringing apparatus comprises a tubular piston nest member (10) for receiving each piston (p) to locate the piston groove in a predetermined ring-receiving position, a plurality of ring cartridges positionable one at a time in alignment with the piston nest member (10). The aligned ring cartridge (30) is engaged to the piston nest member (10) to permit transfer of rings from the ring cartridge (30) to the piston nest member (10) and disengage the aligned ring cartridge when empty of rings. The stack of rings on the cartridge is moved by opposing fingers (80,82) toward the piston groove to position an endmost ring residing on the nest member (10) in the groove of each successive piston received in the nest member while the aligned ring cartridge (30) is engaged thereto. A fiber optic switch (130) is provided for directing a light beam tangentially through the piston groove to determine whether a ring is positioned therein.