Abstract: A device comprising an element (1) serving as a housing and a mounting frame for an apparatus and a suspending element (2), the latter comprising a means (5) suitable for working in conjunction with a complementary means (3) which is integral with the housing (1) so as to form a pivoting coupling; the device also includes adjustable means of spacing (4,5,6) integral with either one of elements (1,2) of the device, said spacing means being designed to work together with a surface of the other element in order to hold the housing (1) in an adjustable predetermined angular position. The spacing means comprise, for example, a means (5) integral with one of elements (1,2) and formed with a rib (4) designed to work together with any one of several grooves (7) formed in the other element.