Calibers: with arrangements affording protection of the clockwork against damage as a

Official title: with arrangements affording protection of the clockwork against damage as a consequence of a rupture of the mainspring {(protection devices against the rupture of the mainspring or its over-tension, placed in the spring-drum or fixed on it against rupture if the mainspring is wound too far G04B1/20)}

G04B33/16 (Calibers: with arrangements affording protection of the clockwork against damage as a) appears on 0 US grants and 0 published applications in this corpus.