| abstract |
1,185,887. Inhaling devices. SYNECTICS Inc. 15 June, 1967 [22 June, 1966], No. 27724/ 67. Heading A5T. An inhaler simulating a cigarette comprises an open tube 14 (53 Fig. 6) of combustible material which surrounds an inner tube 18 (61) or an inner coating of volatilisable material e.g. ammonium chloride, and a mouthpiece 20 (51) having an opening which communicates with the opening of the tube of combustible material the inner tube or coating preferably being separated from the combustible material by an incombustible tube (60) which is impervious to vapours from the volatile material and the combustible material and which disintegrates as the combustible material burns. The device is wrapped in conventional cigarette paper which is impregnated so that it stiffens after burning. The mouthpiece 20 includes a cotton filter 30 and a tube 25 for interconnection with the combustible tube 14. Holes 11 in the wrapper and passages 27, 28 in the mouthpiece permit ingress of air to the mouthpiece as the user inhales so that the vapour of the volatile material is diluted and cooled. Alternatively the mouthpiece (51) includes an apertured aluminium foil baffle (68) and a mesh filter (21). An igniter (55) of potassium nitrate or chlorate with nitrocellulose or ethylcellulose and tobacco may be provided at the forward end of the device. The combustible tube comprises a mixture of perlite diatomaceous silica, charcoal, glycerine and ethyl cellulose with tobacco, potassium nitrate with tobacco or dried lettuce or sawdust with tobacco. The impervious tube (60) comprises dicalcium silicate or bentonite with talc or calcium carbonate and may have an external coating of combustible material e.g. calcium carbonate with potassium or sodium nitrate and an elastomer such as ethyl cellulose, polyisobutylene or polyethylene, or be helically wound with cotton fibres. |