Adjustable seat, especially for motor vehicles

Adjustable seat, notably for motor vehicle, of the type comprising a bottom displaceable longitudinally on a slideway, a back rest having its lower edge hingedly connected to said bottom and its upper edge hingedly connected to a transverse shaft rigidly secured to the side walls of the passenger compartment, each end of said transverse shaft being connected to a first member and to a second member, said members being rigid with the lateral wall of the passenger compartment, said seat further comprising a first means for connecting said shaft to said first member and a second means for connecting said shaft to said second member, control means for rotating said shaft and thus produce a relative movement between said first and second connecting means, said second connecting means being mounted for rotation and translation in relation to said second member.