As I put a CD into my computer’s CD-ROM drive, I notice that it has a (get ready for a technical description here) little wire flippy thing on the left hand side, right along the edge. My first thought was that this thing flipped on over once the CD was inside the drive in order to keep it in place. I discounted this idea because (A) my stero CD player has no such device and yet it doesn’t send the discs shooting out like spinning wheels of death and (B) if I put a CD in and then flipped it myself, the effect was to pop the CD up since the CD was too large to allow it to flip over the disc. Flipping said wire when the drive was empty provided nothing except for the theory that the wire isn’t really attached to any mechanical device as I had no resistance to manually flipping it.
Ok, I’m sure I’ve gone on way too long about something that no doubt has an obvious practical use. Are there CDs smaller than the standard that somehow need securing? And how would they stay centered if they need a wire just to hold them down (and why wouldn’t the spool keep them in place anyway?)