I have not been able to find an answer to the question "what is the purpose of the warning?" What would happen if there was no warning? When and why did warning begin to be used in striking clocks?
Steven G. Conover's book "Striking Clock Repair Guide" page 42, says that the purpose is that "the "train is 'set' or made ready to begin striking exactly on the hour or half hour . . . the locking of the train is transferred from a slow moving wheel to a faster moving wheel, higher up in the train."
The above explanation does not quite answer my question(s). Bob, I liked the pendulum theory part of your clock videos. Maybe you or someone else can educate me about warning theory, or tell me where to look for an answer. Thank you in advance.