Abstract: For a toilet structure or lavatory bowl having a hinged seat and lid, a device is provided for attachment on the lid undersurface for automatically starting the seat to pivot on its hinge from its upright and toward its horizontal position. The device comprises a planar base secured to the lid and a movable element preferably carried at the end of a leaf spring projecting at an acute angle to the base. The movable element is temporarily adhered to the outer surface of the base when it is driven into contact therewith by the force of the seat being pivotally raised to its upright position. The adherence of the movable member to the base is adapted to be automatically released after a brief time delay whereby it snaps back to its original normal position, thereby impacting against the seat and causing the seat to pivot a sufficient distance from its generally upright position whereby the force of gravity completes the return of the seat to its horizontal disposition.