Shabbat 58 - May 3

Study Guide Shabbat 58

The gemara questions Shmuel's explanation on the previous page that kavul in the mishna (that one cannot go out with on Shabbat) is a kavla of slaves. If so, Shmuel himself says elsewhere that a slave can go out on Shabbat with that. The gemara resolves the contradiction by distinguishing between one that the owner gave him and one that he made for himself. There is a difference between one worn around the neck and one one his clothing - why? In a different braita there is no distinction made between the neck and the clothing. How is this reconciled? The braita quoted mentioned also a bell worn by the slave and distinguished between a bell around his neck and one on his clothing. Why? Another contradictory source is brought regarding whether or not the bell is susceptible to impurity and to resolve it, they distinguish between a bell with a clapper and one without. If the clapper is removed, the braita says it is still susceptible to impurity - why?