Abstract: A positive oil candle wick advancing and retracting mechanism including a candle cap having formed therethrough an elongated bore for passage of the wick, at least three elongated tubular elements mounted in the cap immediately below the bore for rotational movement in close equiangular arrangement about a central axis passing upward through the bore, a series of spiral threads formed along the greater length of the outside surface of the elements to engage the wick uniformly thereabout, a series of outwardly facing gear teeth formed circumferentially about a shorter length of the outside surface of the elements spaced apart from the spiral threads, and a candle cap support base including a first mechanism for retaining the candle cap in aligned rotational position thereon, a second mechanism for attaching the base to a candle oil receptacle, and a series of inwardly facing gear teeth formed in a circumferential ring about the interior of the base and arranged for engagement with the outwardly facing gear tee

Abstract: Soft jaws in a powered rotary chuck of a lathe are fixedly secured in position, during shaping of the jaws to fit a piece of work, by an annular boring fixture. The fixture is located concentric with the center of rotation of the chuck. The fixture has three sets of multiple spaced threaded openings. Each set is oriented in a like spiral relative to the center of rotation. Three bolts with threaded shanks are engaged in three of the openings. The bolts have heads fitting in counterbores in the jaws. The jaws are tightened on the heads of the bolts so that the jaws can then be shaped to the pertinent dimensions of the piece of work, then the fixture can be removed, then the piece of work can be put in the jaws, and then operations can be performed on the piece of work as it is being rotated by the chuck. Bolts of different diameter heads can be used to help orient the bolts to the locations of the counterbores.