US2548297A - Tobacco pipe - Google Patents

Description

April 10, 1951 R. o. FERGUSON 2,548,297

TOBACCO PIPE Filed Aug. 25, 1947 Patented Apr. 10, 1951 UNIT-'ED vSTATES wPATENT GFFICE TOBACCO PIPE -Robert 0. Ferguson, Bristol, Tenn., ass'ignorof one-half to Bristol Steel & Iron Works, Incl, Bristol, Va.-Tenn., a corporation 'of Virginia 'Application August 25, 19217,sria111o. $70,443

sclaims. (01131-195) 1 This invention relates 'to 'a ytob'acc'zo -pipe and-its prime Objectis to provide a tobacco pipe which will ail-ord more smoking pleasure to the user.

The lco'i'iventional tobacco pipe will usually enable the smoker to obtain acleancoolfsmoke when the pipe is viirs-t lit. As the smoking continues, however, the smoke becomes hot to a'degree which will very often -burn the smokers tongue. Also, it -is seldom vpossible to burn all of the tobacco w-ithin the ybowl of the conventional pipe because the tobacco in the heel portion of the bowl becomes sog-gy from A-li-ltering the moisture in the smoke drawn therethrough, as well as -froin the tobacco juices, etc. Furthermore, the bowl of the conventional pipe becomes quitenhot after continued smoking and uwhen such occasion arises, the bowl fails to lower the temperature of the smoke.

The main vobject of this invention Ais to elimihate the problems of the 'conventional pipe of overheating of the upper 'pipe bowl, clogging of the screw threads `forr'ni'ng the connection 'of the pipe `bowl and its base and to provide, at all stages of the smoking, a clean cool Asmoke.

Another object of the invention is to provide a tobacco pipe having a pair of bowls wherein the same may be easily and Yquickly secured together in air sealing engagement;

Still another object of the invention is to provide screw threads in the upper and lower ,bowls of the tobacco pipe, the screw threads forming means for `quickly 'securing the bowls together.

In general, the main object of the invention is obtained b'y providing two separate bowls which are detachably secured together, the upper bowl having atobacco burning chamber formed therein, while the lower bowl is completely separated from the upper bowl, `e'cept for a sin-oke passage or bore which provides smoke communication between the bowls'. The lower bowl is spaced a considerable distance from the upper bowl to prvent heat from radiating from the burning chamber to the lo'wer bowl, and the lower bowl has a ehahber formed therein, which chamber mail be filled with a l'llteidng medium. The passage or bore provides communioationbetween the two chambers to permit the smoke to pass from the burning chamber to the ltering chamber and after the smoke has beeniiltered through the mediuxnco'ntained within the Vfiltering chamber, the smoke passes laterally` outwardly through a bore or bores formed through the stem receiving portion of the lower bowl and then iinallyinto the pipe stem proper. annular heat dissipat- 2 ing groove i'sprovided in the upper bowl to reduce the 'temperature thereof. Reference is m'ade to applicants copending applications serial No. 546,128, filedY .July 2,2,

1944,'seria1-1vo. 596,613, one May 30, 1945, and

"portion 'of the upper =bow1 A is 'provided with a,

bottom 3 having'an'inlinedbore lI 0 formed therethrough. The klowerportion vof the bowl A is of reduced annular s iae to 'form la plug-like member Af5 having 'screwthreads t2 'formed,therein., An annular heat radiating :groove 2 is formed about the outer peripherypf the bowl A thus forming Van annular ring '4 havinga flat underside 1. fAn

'annular groove l is 4formed the bottom 'of the plug I5 and is located adjacent the outer periphery thereof and in 'communication with the smoke passage bore ll o The lower bowl, generally indicatedat B, is provided with a smo'keltering and cooling chainber 8. Screw threads I3 formed about the upper portion of theinnerperiphery of the chamber s Yterminate in an annular inwardly tapering shoulder, as indicated vat 6. The lower bowl B hasa stem portion S., the stem portion S in turn having an enlarged bore 5' extending from the outer end thereof inwardly, to a point short of the iltering chamber 8. IA pair of diverging, boresv 9 form smoke passageways from the bore 5 to the Chamber 8- Y s o I Before the pipe is assembled, as shown in Fig. ures 1 and 2, the filtering chamber 8 formed in the lower bowl yB is lled, or substantially filled, with a filtering media. While any iiltering media will suiiice f -or vthe purpose intended, I have found that smoking tobacco forms an ideal nltering media, th e tobacco being capable of absorbin'g impurities and moisture from the smoke and also of lowering the temperature of the smoke materially. It has been vfound in actual use that very often particles of tobacco will lodge in the screw threads 1 3 and, as heatwill expand such particles of tobacco, it often becomes difficult to unscrew the upper bowl from the lower bowl when the upper bowl ofthepipe is warm; Y Accordingly, the' abrupt non-tapering shoulders I4 formed 1n the screw threads l2 will dislodge' such particles oftobacoo normally adhering in the screw threads l2 and I3.y After, the lawyer` bowl has been substantially filled with tobacco,`

indicated at 5, thus permitting expansion of either or both bowls, but preventing the bowls from becoming so tightly secured to each other so that it would be diicult to unscrew the same. After the bowls are thus assembled, smoking tobacco is placed in the smoke burning chamber I and the pipe lit in the usual manner. Suction through the pipe stem, bores 5' and 9, filtermg and cooling chamber 8 and bore I0, will draw the smoke formed in the burning chamber I down through the bore Ill. It will be noted that the positioning of bore I0 is such that the greater portion of the smoke entering chamber 8 will pass from the lower portion of bore I0 downwardly through the filtering media and then into bores 9 which converge into bore 5 and then into the pipe stem. The annular groove 2 and ring or iiange 4 formed in the outer periphery of the bowl 8 will enable air to circulate therein to thus dissipate a substantial amount of heat which is normally formed at the lower portion of the smoke buring chamber I. As the two chambers I and 8 are separated from each other by bottom 3 which is of a substantal` thickness, the lower bowl B is always maintained at a temperature much lower than the temperature of the upper bowl A and accordingly, the filtering media in the filtering chamber 8 is substantially cool. The hot smoke and impurities therein, formed by the burning tobacco in chamber I are cooled to a substantial degree and the impurities and moisture in the smoke are removed by the filtering media in chamber a before the smoke can pass into the pipe stem.

I claim:

1. A smoking pipe comprising a pair of bowls, means for detachably securing said bowls to` gether one above the other, the upper bowl forming a tobacco burning chamber and the lower bowl forming a smoke cooling and filtering chamber, a partition formed integrally with the upper bowl and positioned below the burning chamber for separating the two chambers, Asaid partition having a smoke bore extending therethrough at a maximum distance from the stem of said pipe to provide communication between said burning chamber and said filtering chamber, and a stem receiving portion formed integrally with the lower bowl, said partition and upper bowl having together a Ventilating and cooling annular groove on the exterior thereof, and a ange on said partition having upper and lower surfaces, the upper surface forming the lower wall of said groove, said lower bowl havmg an upper end surface, said last named surface being downwardly and inwardly inclined toward the center of said lower bowl and said lower surface of said ange being adapted t0 engage a circumferential portion only adjacent the outer edge of the end surface of said lower bowl, said rst named means comprising a screw threaded connection on the exterior' of the D211'- tition and the interior of the upper pol-tion @lf the lower bowl whereby when said upper bowl is fully screw threadedly engaged with said lower bowl the lower surface of said ange forms an air-tight seal and a lock with the upper end surface of said lower bowl, without substantial deformation of said flange.

2. A smoking pipe comprising a pair of bowls, means for detachably securing said bowls together one above the other, the upper bowl forming a tobacco burning chamber and the lower bowl forming a smoke cooling and filtering chamber, a partition formed integrally with the upper bowl and positioned below the burning chamber for separating the two chambers, said partition having a smoke bore extending therethrough at a maximum distance from the stem of said pipe to provide communication between said burning chamber and said ltering chamber, and a stem receiving portion formedrintegrally with the lower bowl, said partition and upper bowl having together a Ventilating and cooling annular groove on the exterior thereof, and a flange on said partition having upper and lower surfaces, the upper surface forming the lower wall of said groove, said lower bowl having an upper end surface, said last named surface engaging the lower surface of said iange, one of said engaging surfaces being downwardly inclined towards one edge thereof and the said inclined surface being adapted to engage a circumferential portion only adjacent the outer edge of the other surface, and said first named means comprising a screw threaded connection on the exterior of the partition and the interior of the upper portion of the lower bowl whereby when said upper bowl is fully screw threadedly engaged with said lower bowl the lower surface of said flange forms an air-tight seal and a lock with the upper end surface of said lower bowl, without substantial deformation of said ange.

3. A smoking pipe comprising a pair of bowls, means for detachably securing said bowls together one above the other, the upper bowl forming a tobacco burning chamber and the lower bowl forming a smoke cooling and filtering cham-f ber, a partition formed integrally with the upper bowl and positioned below the burning chamber for separating the two chambers, said partition; having a smoke bore extending therethrough at a maximum distance from the stem of said pipe to provide communication between said burning chamber and said filtering chamber, and a stem receiving portion formed integrally with the lower bowl, said partition and upper bowl having together a Ventilating and cooling annular groove on the exterior thereof, and a flange` on said partition having upper and lower surfaces, said upper surface forming the lower wall of said groove, said lower bowl having an upper end surface, said last named surface engaging the lower surface of said flange, one of said engaging surfaces being downwardly inclined toward an edge thereof and the said inclined surface being adapted to engage a circumferential portion only adjacent the outer edge of the other surface, and said rst named means comprising a screw threaded connection on the exterior of the partition and the interior of the upper portion of the lower bowl whereby when said upper bowl is fully screw threadedly engaged with said lower bowl the lower' surface of said flange forms an air-tight seal and a lock with the upper end surface of said lower bowl without substantial deformation of said ange, said screw threaded conbowl being located directly above the ltering n chamber.

ROBERT O. FERGUSON.

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

UNITED STATES PATENTS Number Name Date Kaldenberg May 25, 1869 Johnson Sept. 30, 1924 Davis Oct. 18, 1927 Mancusi June 3. 1930 vNumber Number Name Date Parson Feb. 3, 1931 Hongbaum July 4, 1933 Segal Apr. 9,1935 Ikeda June 30, 1936 Martin July 27, 1943 Fawcett Apr. 4, 1944 Swift Sept. 18, 1945 FOREIGN PATENTS Country Date Great Britain 1897 Great Britain 1908

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