Similar to the European "Puck" machines, the AQ is a very simple machine! Unlike the "Pucks", however, which lacked a feed screw, the AQ has a course feed screw that the reproducer support sits on. The Columbia AP is very similar to the AQ, but it lacks a feed screw altogether.
The simple fixed-spring motor lasts for about one cylinder, and the key cannot be wound while the unit is playing.
The "tri-nut" rides along the course-threaded feed-screw.