Abstract: The object of the invention is a reduction gear comprising a worm screw driving shaft (3) engaging with a first portion (6a) shaped so as to obtain a gear wheel mating the driving means (3), at least one worm screw shaped second portion (6b), connected to said at least one first portion (6a) engaging with a rack (13b, 15b) integral with a gear wheel, which acts as a power take-off (30, 31). The gear-wheel shaped first portion (6a) and the worm screw shaped second portion (6b) can be provided on the body of a pinion or spool (6).

Abstract: A sanitary rotating fixture (10, 10a), which conceals in a wall niche (11). The fixture is more or less triangular in shape when viewed from the side. It has a rear wall (13, 13a), an upper base (21, 21a), side walls (16, 16a), a sloping bottom (17, 17a) and a means of rotation (12, 23) permitting rotation for less than 90.degree., in particular of about 60.degree. around a horizontal axis. Holding means, for example in the form of stops are provided for projecting caps (14) that slide in arch-shaped grooves (15) in the side walls of the niche (11). A plastic sheet (31) is provided to conceal flushing ducts thus preventing dirt accumulation on them and behind the fixture.