Dog lead is mounted on spring-loaded reel which cooperates with drive system to move control disk which frees lock and then moves it to lock reel when predetermined length of lead has unwound

摘要

The dog lead (13) is mounted on a spring-loaded reel (12). The reel cooperates with a drive system to move a control disk (23) which frees a lock (16) and then moves it to lock the reel when a predetermined length of lead has unwound.