US2580974A - Smoking pipe - Google Patents

Description

R. B. SUTTER Jan. 1, 1952 SMOKING PIPE Filed July 16, 1945 liwm bor. Rosa 33.8mm

Patented Jan. 1, 1952 UNITED STATfiS FA'EENT OFFICE "Boser B.'Sutter, Moscow, Pa. Y Application July'lfi, 1945, Serial No.i6fl5;356

, 4 Claims.

The invention :15 concerned with .a tobacco :pipe, inwhich arezincludedmeansgfor controlling the condensation of vapors produced during smoking.

."Gne of theieatures 'of :the invention is the provision of .means -for "transferring heat from one part of the tobacco charge to another, whereby to control condensation within :the tobacco :charge.

Another feature of "the: invention is the :provision :of means for limiting the condensation within the tobacco charge, to ether with cooling devices interposed-in the path 'of the'smoke for removing heat therefrom-and provoking a controlled condensation of vapors externally of'the tobaccospace.

Afurtherxfeatureof the "invention is the provision of a tobacco pipe having heat-conductive devicessfortransferring heat from-the combustion zone toward .unburnt portions of the tobacco charge whereby to maintain theilatter at axtem- ;perature :above :condensation of moisture therein, together with means for. withdrawing heat from the combustion zone and for cooling the smoke after leaving :the tobacco space.

With these and other features :as objects in view, two illustrative forms of practice arewshown in the accompanying :drawings, in "which:

Figure 1 is a sectional view :substantially (on line |--I ofiFig. 2,;takenaalongthe axes'oithe bowl and of the bowl stem extension of a pipe embodying this invention, *the mouthpiece being shown .in elevation.

TFigure'Z isa top-view-of-the same.

Figures 3 and 4; are perspective views of the separator structure employed .inFigures l and12.

Figurefi showsa modified form, withthe structure shaped as acigarette pipe;

In-pipe smoking, theinitialpuiisiroxh a-freshly -filled and lit pipe are usually mild and full of aroma. As the smoking proceeds, the-operation maybe divided into three successive stages: (1) an initialstage which produces a-mild and aromatic smoke; (2) an interim-stage which produces a hot acridsmoke with little aroma; (3) a terminalstage whichproducesa sultry, offensive smoke with no; aroma. Inthe initial stage, an abundance of oxygen is availablepat the surface of the burning tobacco for ,propercombustion oi the. dry tobacco: and the smoke passes through :a my :cold. bowl filled with cold tobacco and is cooled :inritspassa ge, butan appreciablezamount of cimdensation mattersaare deposited .in the-cool portion of the tobaccocharge, and-charting oc.- curs adjacent the burning-zone. During the 111- amounts of condensed, matters;

- matters .and also acts as cheat-insulator. The

fire causes progressivereeevaporation of, the condensed-materials. Eromztime toitimethe smoker manipulates the tobacco: so that this surrounding mass is levelled off, thus'bringing the saturated tobacco towardthe combustion .zone. .During the terminalstage, the accumulation ofiheat toward the center .of the bowl, with restrictions on the delivery of oxygen for proper combustion, gives rise to a major charring or carbonization rather than to clear-cut combustion, and this char-acts to absorb moisture and other volatiles, being highly hygroscopic and .absorbent, wherewiththefinal stageof smoking represents heating which produces re-ev-aporation of moisture and :products of semi-combustion without the :presence "of a volume of cold unconsumed to- .bacco by which these products are eliminated from the smoke.

In the, customary useof a conventional pipe, likewise, the loose remnants of'ttobacco are removed, usually by rapping out this dottle, which is moist :from its saturation with-condensed vapors. .Duringfithe combustion, a baked crust or-residue forms on :the side andbottom of the .bowl as :a char saturated with ill-smelling condensation-products, and can only :ber-eliminated byscraping the "-bowl' :with a sharp instrument.

'Ithas been sought'to remove condensiblevcpors by employing condensers or filters," but: these devices can only. actvafter the L cold underlying parts of the tobacco charge have-been brought above condensation temperature, and hence are only effective during the latter portions :of each smoking operation. Furthermore, many :such devices are inclosed within the wood or hard :rubber portions of the pipe so that they are effectively insulated from being co'oled to the desirable temperature for effecting condensation. When metal heat-conductive"structures area used, it'is usualiy vfound that thercon'densation'cceases during the aforesaid interim:istagef-due to lack;-::of suflicientrareaof cooling; surfaces in ratio to the volume of smoke passing-through the-stem, and because the condenser is raised toffsu' ch a temproceeds.

' bowl portion land The smoke outlet IT is groove, and leads to the passage (8.

fore passes through a filter and condenser of. a

heat-conductive material which presents a large area to the volume of smoke for absorbing heat therefrom and is effective for transmitting this heat to an external wall which is exposed to a cooling air current. Thus, the removal of water vapor is not effected by the lower part of the tobacco charge, but by the condenser, and this condenser is maintained cool so that its effect prevails throughout the smoking operation, with the result that the tobacco is maintained dry and free from the vapors which heretofore have successively required re-evaporation as the smoking In addition, the present structure provides easily operated and effective means for preventing the accumulation or caking of char upon those portions of the bowl structure which are contacted by the tobacco charge.

The embodiment of the invention illustrated in Figures 1 to 4 comprises a body having the the stem extension 4 l, which may be of briar. The'bowl portion l0 has a cavity extending from the'open end, and includes the internal shoulder I! which is shown as a conical surface. Below the shoulder l2, the lower part of the cavity has a cylindrical wall surface and a substantially flat floor in which is a circular groove or recess 13. An air inlet if: at a low level, and an air outlet extend through the said cylindrical wall surface. within the circular floor A mouthpiece I9 is shown as a conventional bit with a reduced end fitting the passage 18.

Within the bowl portion In is located a removable separator having a body with a convex upper surface from which project the partitions 2B which are six in number in this illustrative form. These partitions have outer edges closely fitting the portion of the bowl cavity above the shoulder l2 and extend inwardly toward the bowl axis and thereby divide the bowl space into com- -partments. The partitions terminate short of the bowl axis. The lower surface of .the separator has a conical shape for fitting the shoulder 12, and a reduced central cylindrical extension 21 which is hollow and has its lower end engaged in Y the circular floor groove i 3.

the extension 21 is enlarged into the body 25 (Fig. 1) and is illustrated as having a hemi- The. space within spherical upper end' surface. Passageways or fiues 28 lead through this end surface and'com- -municate with the space above the-body 25, it

being preferred to have at least one flue opening into each compartment as delimited by the parti- -tions 26, together'with a central flue, -'Ihe separator is of non-combustible material, and pref- :erably is of a metal such as aluminumwhichconducts heat-readily and does not rust.

The 'space'within extension"?! receives a filter member 30, pref'erablyof steel wool, metal screening, spun glass, perforated or corrugated metal,

or like heat-resistant and heat-conductivem'ate- 'rial for collecting bits of tobacco and ashyand for It at a high level,

receiving condensed tar, and being effective to transfer the heat of the smoke to the extension 21, for cooling the smoke.

In service, the pipe is filled with tobacco in the normal way, packing to the user's preference into the central space and in the individual compartments. The tobacco is lit, and smoking accomplished as usual. The central space and compartments tend to act individually and each to receive a proper amount of oxygen; but heating at a partition is transmitted through its volume so that hot spots are relatively cooled and cool spots relatively warmed, whereby a more evencombustion occurs and there is less tendency to char a portion of the charge, to permit the char to cool and act as an absorbent, and then to heat it again.

The lower surface of the body 25 and its extension 21 are cooled by air entering at the low air inlet l5 into the jacket space between the external wall surface of the gas-tight extension 121 and the inner wall surface of the bowl, with the heated air escaping through the high air outcondensation of tars, etc., is augmented.

After completing the smoking of the charge, any accumulation of cake'on the inner wall of the cavity can be scraped away by rotating the eparator about the bowl axis, wherewith the separator rides on the shoulder Hand in the groove The separator can be removedga'nd the filter 38' cleaned and replaced when clogging or saturation appears.

In the modified form shown in Fig. 5, the parts arid operation are essentially the same, and like reference numerals have been employed. The bowl portion 1 0* has a common axis with the stem extension l I and the mouthpiece is. It is customary tohave such cigarette pipes with bowl cavities of smaller diameter than those of the conventional pipes as illustrated in Fig. l; and the partitions 26 are likewise thinner and of lesser radial dimension The free'or outer ends of these partitions are shown as reinforced by a peripheral rin 40.

The illustrative forms are not restrictive, and

the invention may be employed in many ways within the scope of the-appended claims.

' I claim:

1. A tobacco pipe including a bowl and a stem, in combination with a heat-conductive separator dividing the bowlintoan outer tobacco-holding space and an inner cooling portion, the separator having a hollow extensionfor leading the smoke to the stem, the said cooling portion providing a cha ber around the extension, the bowl having air inlet and outlet openings to said chamben'and heat-conductive partitions on said separator and located in the tobacco space to divide the same into compartments, the separator having 'flue openings from the hollow in said extension to the outer surface of the'separator with a flue opening into each of said compartment-s, said partitions closelyeonfoiming to the wall of the tobacco 4 space and extending radially toward and terminating short of the bowl axis.

positioned across a hollow extension on 2. A partition structure for a tobacco pipe havin abowl comprising a thick" metal base to be the tobacco cavity of the bowl, 7 the baseand having a diameter less than that of theb'ase and adapted to be positioned between the base and the bottom of the bowl when the structure is in use, and

peripherally spaced and radially arranged metal members" connected to the base and extending therefrom'into the tobacco space, said members I l terminating short of the axis of the bowl, said base having apertures opening at one face of said base within said hollow extension, and opening at the other face in the spaces between said metal members. i

3. A tobacco pipe including a bowl and a stem, in combination with a heat-conductive separator to the smoke outlet, said passage being closed off from said cooling filter material in said extension, the bowl having chamber, heat-conductive air inlet and outlet openings to said chamber, the

{separator having flue openings leading from the j passage in said extension to the separator surface adjacent the tobacco-holding space, and

, heat-conductive members connected to said sepdividing the bowl cavity into a tobacco-holding bowl having air inlet and outlet openings to said chamber, '-.the separator having flue openings leading ,from the passage in said extension to the separator surface adjacent the tobacco space,

and heat conductive partitions on said separator and located in the tobacco space for conduct ing heat u'pwardly and downwardly from the combustion zone, the downwardly conducted heat being delivered to said separator, said partitions terminatiiigishort of the bowl axis.

4. A tobacco pipe including a bowl and a stem, said bowl presenting a cavity having a floor with a recess, said .floor having a smoke outlet leading tothe stem, a heat-conductive separator dividing the bowl into a tobacco-holding space adjacent the 'open end of the bowl and a cooling chamber adjacent said floor, the separator having a hollow extension engaged in said recess and providing a passage for leading the smoke farator and extending through the tobacc0-holding space to the open end of the bowl, said members extending inward, from terminating short of the bowl axis.

the bowl wall and ROSER B. SU'ITER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Number Name Date Grosz ;f; Sept. 7, 1886 Kaldenbergf Mar. 16, 1897 Henne May 11, 1897 Sibbett July 28, 1912 Chanchuck Jan. 22, 1918 Cooper July 16, 1918 Gilbert Aug. 27, 1918 Van De Voorde Dec. 8, 1925 Biber Sept. 3, 1927 Jacob Jan. 19, 1943 FOREIGN PATENTS Country Date Great Britain Mar. 15, 1888 France May 23, 1934

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