Fixing means for winding crown in back winding watch

Claim 1

In a watch, a winding stem mounted for rotation for winding a winding mechanism and for driving a hand-setting mechanism, means mounting said winding stem rotationally and for movement axially between two operative positions corresponding to a first position for driving said hand-setting mechanism and a second position for setting the hands, said stem having a first axial portion having opposite flat surfaces, a clutch gear on said first axial portion movable axially thereon and rotational with said winding stem, a second axial portion on said winding stem having flat surfaces and a stepped portion on an end of said winding stem, a crown on said second portion having a through opening receiving said stepped portion and having inward projections seating on said stepped portion, said crown opening having a circular configuration along an axial extent thereof and a configuration along an axial extent thereof complementary to the cross section of said second portion for rotation with said winding stem and having said projections thereon seated on said stepped portion defining the axial position of said crown, said winding stem having a tapped blind bore extending from an end thereof axially into said first portion of said winding stem, a screw holding the winding stem seated axially against said stepped portion, said circular configuration of said through opening having a diameter greater than the transverse dimension of said complementary configuration, portion thereof, and said screw having a head fitting into said through opening along said axial extent thereof having said circular configuration.