Abstract: A toothbrush has a handle and a head portion in which tufts of bristles are mounted in two different types of supports. Supports of a first type are mounted in the head portion for oscillation about axes perpendicular to the length of the bristles so as to be oscillated by rectilinear motion of the toothbrush on the teeth. At least one rack is connected with inner ends of supports of the first type so as to be reciprocated by oscillation of the supports. Supports of a second type are mounted in the head portion for rotation about axes parallel to the length of the bristles. Pinions on the inner ends of supports of the second type mesh with the rack or racks connected with supports of the first type so that the pinions and respective supports of the second type are rotated upon reciprocation of the rack of racks by oscillation by supports of the first type.

Abstract: An articulated bed having a tubular frame, a mattress-holder made up in three parts; a back-rest, a seat-rest and a leg-rest; an arcuate cradle welded to the frame; a carrier capable of rolling on the cradle and an air compressed jack acting on the carrier. Under the combined action of the weight of the carrier and of the jack, the mattress-holder is practically in a state of stable equilibrium in any relative position of the back-rest and of the seat-rest.