- dogging cylinder
- n.a key operated cylinder used to dog an exit device
Locksmith dictionary . 2014.
Locksmith dictionary . 2014.
Chuck (engineering) — Self centering three jaw chuck and key with one jaw removed and inverted showing the teeth that engage in the scroll plate. The scroll plate is rotated within the chuck body by the key, the scroll engages the teeth on the underside of the jaws… … Wikipedia