Description
Class G04B : MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
Subclass 1/20: Driving mechanisms with mainspring Constructions for connecting the ends of mainsprings with the barrel or the arbor Protecting arrangements against rupture or overwinding of the mainspring located in the barrel or attached to the barrel (in connection with keys or the like G04B 3/06, G04B 3/1; in connection with automatic winding devices G04B 5/24)