the storage tube 17 the particular one shown is about 4 5 inches tall 2 25 inches in diameter and weighs about 5 pounds it is secured to the first section 28 of the chain 13 the chain is comprised of five sections 28 29 31 32 and 33 with interconnecting s hooks 34 36 37 and 38 as shown as will be seen the section 28 and the section 31 are comprised of the same type of chain i e 5 16 inch steel chain and the section 29 is comprised of a lighter weight chain that merely serves to connect the sections 28 and 31 but plays no active role in the weighting algorithm in order to allow for automatic retrieval of the chain 13 however it will also be seen that the section 31 32 and 33 are of decreasing weight such that once the counterweight falls to the bottom of the storage tube 17 the weight of the chain suspended from the top of the storage tube i e from the bell 22 to the pile of chain piled at the bottom of the storage tube 17 is sufficient to cause by its gravitational pull the remaining portion of the chain 13 to be drawn into the storage tube 17 a description of each section of the chain 13 is shown in table 1 below thus considering that the distance from the bottom of the storage tube 17 to the center of the bell 22 is 52 inches when the counterweight 27 reaches the bottom of the storage tube 17 the sections 28 and 29 as well as substantially all of the section.