A look at some ticket vending mechanisms.

The mechanisms that vend your prize tickets from games in family entertainment centres are fairly simple, and yet complex too. The ones shown here are quite old, but still capable of dealing with things like ticket positioning, feedback of tickets paid out (as pulses) and locking mechanisms to ensure that tickets can't be dragged out, and instead break off at the perforations. The Coin-Controls one is the most complicated with an actual locking mechanism that physically locks the output drive rollers when the tickets are pulled. The Deltronic unit relies on heavy gearing to prevent the output rollers from being forced round as the tickets are pulled. Both units mark the tickets with tire-tracks to show they have been vended, which is also a byproduct of the tightly gripping feed mechanism. Both have simple logic based control boards with various timing and detecting functions that control the ticket vending, feedback to the game itself and detection that the tickets have run out.