weld rivet etc commonly disposed through the holes 17 21 there is a fifth support arm 15 having a first end portion a second end portion and a shank portion which fifth support arm 15 includes a sixth radial gear 31 disposed thereon wherein the sixth radial gear 31 is in meshing contact with the fourth radial gear 29 that is disposed on one of the end portions of the third support arm 11 the fifth support arm 15 further includes a hole 23 along its shank at a location which allows it to be rigidly attached to the second support arm 5 at hole 19 such as by means of a pin weld rivet etc commonly disposed through the holes 19 23 fig4 shows an exploded perspective view of a subcombination useful in providing a device according to one embodiment of the invention in fig4 there is a first support arm 3 having a first end portion and a second end portion which further comprises a first radial gear 7 disposed on its first end portion and a connection point 17 along the length of its shank which connection point 17 may comprise a hole disposed through the shank portion of the first support arm 3 there is also a second support arm 5 having a first end portion and a second end portion which second support arm 5 further comprises a second radial gear 9 disposed on its first end portion and a connection point 19 along the length of its shank which connection point 19 may comprise a hole disposed through the shank portion of.