Mainspring mechanism and spring barrel assembly

Abstract

A spring barrel is rotatably mounted on a barrel arbor. A spring core is non-rotatably connected to said barrel arbor and surrounds the same. A coiled spring is disposed in said barrel and has an inner end secured to said spring core and an outer end secured to said barrel. A ratchet wheel is non-rotatably connected to said spring core on one side of said spring and is formed with ratchet teeth. A locking lever is disposed on that side of said ratchet teeth which is remote from said spring and is frictionally coupled to said spring core and has locking tooth means adjacent to said ratchet teeth. In addition to the spring barrel assembly comprising the above parts, a mainspring mechanism comprises a barrel bridge, in which said barrel arbor is rotatably mounted, first and second stops carried by said bridge and spaced apart in the peripheryl direction of said ratchet wheel, and a winding wheel having winding wheel teeth which are in mesh with said ratchet teeth and protrude from said ratchet teeth on the side remote from said spring. The locking lever is disposed between said first and second stops and is movable against the force of said spring from a first position, in which said locking lever engages said first stop and said locking tooth means interengage with said winding wheel teeth, to a second position, in which said locking lever engages said second stop and said locking tooth means are disengaged from said winding wheel teeth.

Dependencies are inferred from the claim text.