Hinge with adjustable stop and hold mechanism

An improved universal hinge for performing stop and hold functions with adjustable stop angles comprising a hinge body embodied with a self-locking spring-bushing assembly, in between two hinge knuckles, which comprises a C-spring, which is a conically-shaped ring with an axial opening cut and with teeth formed on the radially wider rim, and a step-configured ring bushing, which is a ring with a conical inner surface and two curved edges on the upper rim, in which said C-spring and said step-configured ring bushing are installed on the hinge pin in a way that said curved edges on said step-configured ring bushing are placed adjacent to a hinge knuckle having matching curved edges while said teeth on said C-spring are placed adjacent to the other hinge knuckle having matching teeth such that said conically-shaped outer surface of said C-spring is contacting and is being contracted in said conical inner surface of said step-configured ring bushing so that said step-configured ring bushing and said C-spring are pushed away from each other toward said adjacent hinge knuckles respectively to have said self-locking spring-bushing assembly couple to said other hinge knuckle adjacent to said C-spring through said teeth and, hence, said self-locking spring-bushing assembly moves along with said other hinge knuckle adjacent to said C-spring whereby stop feature of said universal hinge is performed as said two curved edges go to in contact with each other and, at predetermined opening position of said universal hinge, hold feature of said universal hinge is performed as two reflex points on said pair of curved edges go across each other.