referring to fig1 the filtering apparatus according to the present invention includes an open - ended enclosure 10 and a cap 38 releasably engaged to the smaller end of the enclosure 10 . the cap 38 has a central aperture defining a first smoke conduit , through which a first tube 36 passes . a second tube 34 is located concentrically within the first tube 36 , and defines a second smoke conduit . a cigarette support 40 is connected to one end of the second tube 34 . the support 40 is dimensioned and configured to frictionally engage a cigarette c , cigar , pipe , and the like . connected to the support 40 is a heat - activated catalytic converter 42 . the catalytic converter is preferably made from a wire coated with platinum and rhodium . the catalytic converter may also contain other known heterogeneously catalytic metals including raney nickel , silver , palladium , and the like . the larger open end of the enclosure 10 is frictionally and releasably engaged to a base 12 . when mated to the base , the enclosure 10 and base 12 define an inner volume 44 , in which smoke from the cigarette c is trapped . a plurality of filtering elements are positioned axially within the base and define an air - permeable filtering passageway from the inner volume 44 to the outside environment . the filtering elements include a condensation filter 16 , a smoke - absorbing filter 20 , a desiccating filter 24 , a bacteriostatic filter 26 , and a deodorizing filter 28 . each of the filtering elements may include a central opening therethrough . when placed into the base , the central openings of the filters , in registration , define an open central bore 30 which passes through the center of the filtering elements . a releasable closure 32 is provided to seal the bore 30 . each of the filter elements of any desired thickness may be individually removed , or the entire filter assembly may be removed as a self - contained filter cartridge . in the latter case , the filter elements would be confined within removable housing 46 having perforated bottom 48 . in this embodiment , once the filter elements are exhausted , the enclosure 10 is removed from the base 12 , and the removable housing 46 removed from the base . a new filter cartridge would then be placed into the base . the filter cartridge is preferably retained within the base via a friction fitting . other releasably fastening means , however , such as threaded fasteners , function with equal success . when placed into the base , enclosure 10 rests upon a perforated tray 14 . the tray 14 not only provides a tight fit between the enclosure and the base , it also serves to collect ashes from the burning cigarette , and to isolate the filter elements from disruption . directly below the perforated tray 14 is the first filter element , a condensation filter 16 . preferably , the condensation filter is a layer of spherical glass beads , or glass rods . this filter serves to condense moisture from the cigarette smoke and air introduced into filter from the user &# 39 ; s exhaled breath . because of their relatively large size , a rigid perforated disk 18 may separate this filter element from the remaining filters . a smoke absorbing filter 20 is preferably located directly below the condensation filter 16 . preferably , the smoke - absorbing filter can be made of a layer of silica gel , although other smoke absorbing media may be used . such media include , but are not limited to alumina gels , diatomaceous earth , zeolytic or hepafilter materials and the like . filter dividers 22 may separate the individual filter elements . these filter dividers may be any type of air - permeable membrane . preferably , the dividers 22 are porous paper sheets which are either treated or untreated . such treatments may include treating with finishing agents , stiffeners , desiccants , colorants , and the like . a desiccating filter 24 functions to absorb , entrap , or in any manner immobilize the moisture condensed by condensing filter 16 . the desiccating filter is preferably made of a layer of solid hygroscopic material . any type of hygroscopic material will function in the present invention , so long as the hygroscopicity of the material is sufficiently high to immobilize the moisture which enters the filter . a bacteriostatic filter 26 functions to prevent the growth of bacteria within the filter media . because moisture will be trapped within the filter , there is a possibility that , absent a bacteriostatic agent , the filter media itself might provide a suitable grounds for the growth of bacterial colonies . preferably , the bacteriostatic filter is a bacteriostatically - treated cellulose fiber . a deodorizing filter 28 functions to deodorized the filtered air as it passes into the ambient environment . preferably the deodorizing filter is a layer of activated carbon . this filter may include perfumes and the like as well . in operation , a cigarette c , or other smoking material , is placed in support 40 , in close proximity to catalytic converter 42 . the enclosure 10 is then placed within the base 12 . the user then draws smoke from the cigarette by creating an oral vacuum on tube 34 . the user then exhales the tobacco smoke back into the enclosure 10 via tube 36 . a top ( not shown ) may be releasably fastened about both of tubes 34 and 36 to seal all smoke inside the enclosure . the smoke within volume 44 then must pass through all of the filters described above prior to being released into the ambient environment . the closure 32 may be periodically removed to drain any excess moisture which accumulates within the filters . an alternate preferred embodiment of the present invention is shown in fig2 . this embodiment is basically the same as that shown in fig1 but includes a gravitationally activated ignition assembly 50 to initiate lighting the cigarette without the use of an open flame . also , this embodiment includes an inner smoke tube 60 and a concentric outer smoke tube 62 which are hermetically sealed at both their ends . the ignition assembly 50 includes a cylindrical housing 52 having a central aperture 55 in communication with an open funnel 57 . opposing bores 54 and battery compartments 56 vertically extend through housing 52 , which may be made of any suitable fireproof material . central aperture 55 contains ignition coil 70 which is electrically connectable to spring switch 72 having spaced apart contact points 75 and 77 . a protective screen may be placed above ignition coil 70 , which is powered by batteries b . the ignition assembly 50 vertically slides along parallel rails 80 which extend through housing bores 54 and terminate at support ring 82 . support ring 82 is secured to removable lid 85 , which sealingly engages the top open end of cylindrical enclosure 100 . lid 85 has a central aperture through which hermetically sealed tubes 60 and 62 passes . outer smoke tube 62 has a plurality of circumferential orifices 64 above lid 85 and a plurality of ports 66 communicating with the interior volume of enclosure 100 . preferably , enclosure 100 is of a unitary construction and includes a base section 90 which contains the plurality of filtering elements describes hereinabove . base section 90 has a perforated top 15 and perforated bottom 48 to allow smoke collected within the upper section of enclosure 100 to pass through the filters prior to being released to the environment . the filter elements may be removed as a self - contained filter cartridge as described above or permanently secured within base section 90 . in the latter case , once the filter elements are exhausted after continued use , the ignition assembly 50 is removed and the entire enclosure 100 may be discarded . the ignition assembly 50 including lid 85 may be retained and the disposable enclosure 100 including the filter elements may be replaced . as shown in fig2 heat - activated catalytic converter 42 is preferably a spring or spiral wire coated with a noble metal such as plantinum . spiral catalytic converter 42 is frictionally attached at a top end to smoke tube 62 by means of support member 88 . the bottom of catalytic converter 42 is secured to movable platform 86 , which slides up and down rails 80 . this arrangement provides for more effective catalytic activity throughout the full length of burning cigarette c , and allows for re - lighting the smoking product in the event it becomes extinguished . in operation , when the ignition - filtering system of fig2 is tilted as in a normal movement used in drinking a beverage , the ignition assembly 50 is caused to slide by gravity along rails 80 and the spiral converter 42 is pushed upward to allow the tip of cigarette c to be brought into contact with ignition coil 70 . preferably , the ignition - filtering system is raised into a steep upward angle of about 45 degrees . upon contact with cigarette c , ignition coil 70 is forced against intermittent spring switch 72 which in turn forces the switch contact points 75 and 77 to close . thus , the electrical circuit from batteries b is completed and ignition coil 70 is caused to heat . when ignition is achieved , ignition assembly 50 slides down guide rails 80 to reopen switch 72 , thereby turning off ignition coil 70 and relieving batteries b from further drain . in the preferred embodiment shown in fig2 smoke is drawn into the mouth of the smoker through inner smoke tube 60 . the smoker then exhales secondhand smoke into orifices 64 by extending the lips down the length of outer tube 62 towards the exterior surface of lid 85 . the smoke is then forced into the interior chamber of enclosure 10 through entry ports 66 located directly below the interior surface of lid 85 . subsequently , smoke is forced downwardly through the filter elements 16 , 20 , 24 , 26 and 28 , prior to being released into the environment as described hereinabove with respect to fig1 . the fig2 embodiment of the present invention provides complete isolation of the cigarette ignition and smoking process . this preferred embodiment effectively eliminates all legitimate concerns regarding the environmental and interpersonal impact of smoking since it permits total filtration of all second - hand , side stream and initial combustion smoke and gasses . also , the ignition - filtering system of fig2 permits the ignition of tobacco products in an explosive or highly combustible environment since the electrical lighting element and lighted cigarette are contained within the sealed enclosure . in addition , the entire ignition assembly 50 may be removed from enclosure 10 for convenient cleaning . it is to be understood that the invention is not limited in any manner to the embodiment described above , but includes any and all embodiments encompassed by the following claims .
an ignition - filtering system including a multi - stage filtering apparatus with a gravitationally activated ignition device to permit complete isolation of the lighting and smoking process . the ignition - filtering system filters second - hand smoke exhaled by a smoker , side - stream smoke which is evolved from the burning tip of a cigar or cigarette , and initial combustion smoke and gases . the ignition device is battery powered and includes an electrical ignition coil . the multi - stage filtering apparatus includes an enclosure surrounding a smoking product and a base having a filter assembly . a catalytic converter surrounds the smoking product within the enclosure the filters inside the assembly may include a condensation filter , a smoke - absorbing filter , a desiccating filter , a bacteriostatic filter , and a deodorizing filter . two concentrically disposed smoke conduits provide passage for smoke to be inhaled by the user , and then exhaled back into the enclosure , where the smoke is dried , filtered , and catalytically decontaminated .