Abstract: Apparatus for removing plaque and/or stains from the surfaces of teeth has an elongated handle which contains a removable cartridge for a supply of flowable solid material and whose nozzle defines a mixing chamber receiving solid material from the cartridge and further receiving compressed air from an adapter which is also connectable to a dentist's drill. The adapter further supplies a stream of water which is discharged by the nozzle through a first orifice. A second orifice of the nozzle communicates with and receives from the mixing chamber a mixture of compressed air and solid material.

Abstract: A drive mechanism for the window of a motor vehicle includes a carriage having the window affixed thereto and a carrier attached to the carriage with a drive cable having the carrier fastened in driven engagement therewith. A guide tube made of plastic material surrounds the drive cable and a support tube surrounds the guide tube. Both the support tube and the guide tube are formed with a longitudinal slot through which a portion of the carrier may extend in order to effect the driven engagement between the drive cable and the carrier.