US2644464A - Smoking pipe - Google Patents

Description

y 7, 1953 E. E. LANCASTER 2,644,464

SMOKING PIPE Filed Aug. 23, 1943 IN V EN TOR.

duct 5.

Patented July 7, 1953 uNl'rso srnrss h gsMo' m G PIPE Edgar a n iicastr, Cleveland,-0hio. Ap ntsuon-A g 'srzs, 1949,, SerialNo'111l822 Claim; (01.131-191) This invention 'relat'es' to'"improvement in to'ibacco'pi'pes and more particularlyto apipe which cools and'filters the smoke' passingtherethro'ugh, which is easily cleaned, is shaped forconven ience in carrying, islri'gi'd in construction, and is economical to produce.

Qtherobjects andadvantages will be. apparent from the drawings whichillustrate a preferred embodiment of thei'nvention' and in which:

Fig. -l'. is a horizontal plan view-of the-pipe embodying the principlescf the present inven-' smoke to pass through a restricted duct which causes intimate contact between all portions of f the smoke and the wall of the duct, the heat being removed from the duct wall by metal con-- duction of a large mass of metal which is capable of removing the heat so rapidly between intermittent draughts of smoke that the duct wall is cool for each succeeding draught and which,

' in-turn, more slowly radiates the heat into the air from the large mass of metal by. radiating fins, and a filter for absorbing the condensate resulting from the rapid cooling. g

The pipe comprises essentially a cylindrical barrel, indicated generally at I, formed fromia single piece of compacted metal, such as aluminum or'steel :bar or rod stock. iThe barrel is" bored to provide a thin walled enlarged bowl receiving bore .2 which is adapted to.-receive ,a wooden-tobacco supporting bowl-3, the bowl 3 being press fitted into the bore 2: and additionally secured in place by a press fitted annular washer 4. The bowl 3 is shaped externally so as'to fit the 'The mouthpiece. 9 is formed of amber. hard rubber; or one of the synthetic plastics. It is provided. with the usual axial duct and with internal bores adapted to receive the. portions 1 and 8 Witha tight slip fitso as to be readily detachable for cleaning;- A small ferrule 10 preferably is provided at the inner end of the mouthpiece 9 for reinforcingtherelatively thin walls there existing I The external surface: oiv the: barrel, between the portion land theopp'osite end, is provided with apluralityof radial flanges H. The bore 2, duct Sandborefi ,are'ooaxial and are about equal in length. The: bore; 2 is. relatively large and thin walled whereas the; duct 5v isv relatively small. The bore 6 is much. larger than. the duct 5" and preferably is large enough in. diameter and of the proper length to accommodate snug:- ly one-half of an ordinary cigarette l2 which serves as a removable filter medium.

The, barrel, taken to the outer dimensions of the fins l, is generally cylindrical though it may be slightly greater in diameter near the longitudinal mid-portion with a; slight taper toward the ends.

ness, exclusive of the fins ll; jpreferably being. more than one-half the diameter of the fins ll.

at'that portion so asto'providean efiective heat a I absorbing and radiating means [3 for absorbing 5 heat from the smoke and for dissipating it rapidbore 2 so that no cavities exist between the walls' of the bowl and bore.

At its inner end the bore2 is connected to; one

end of a duct 5 which at its opposite end isfconnected to a filter bore 6 which opens through the other end of the barrel I. The bowl 3 has inits base or, inner end the usual port which is coaxial with and forms in effect a continuationioi the The end of the barrel opposite from the bore 2 is provided with a reduced diameter. portion 1',

and adjacent theretofa larger diameter portion 18,

the portions 1 and 8 receiving with a press fit a suitable mouthpiece 9. g

1y into the air.

A distinct advantage results from such an ex-' tremelyzthick'wall andsmall duct in the heat absorbing and radiating means l3. A relatively] small duct is necessary in order toassure that all of the smoke passes into intimate heat exchange relationship or contact Wlbh'thWfillS .of' 'the duct. Such a small duct; however, has a ;very small exposed wall surface.

in a veryrapid rate of heat exchange between the smoke and themetal Wall of the duct 5.

This results The radiaticn' oi heat from metal intorair is much slower than the conduction of heat from,

one portion of-a piece of metal to another.

' Therefore, a large mass of'metal is provided to conduct the heat from the relatively small exposed wall surface area of the duct 5 rapidly so that the smoke subsequently drawn through the ductcan be cooled'by the same small wall surface area of the duct. Having withdrawn the heat from the'exposed surface area of the wall of the duct 5 rapidly, the heat is conducted to a.

The portion of the barrel between.

the inner end of the bore 2 and the outer end of V the bore 6 is such that the defining wall of the duct 5 is relatively very thick, the radial thicklarge radiating area which though radiating more slowly per unit area has a much larger surface area than could be provided directly for the small diameter duct. Since the fins are integral with the barrel, conduction into them from the large mass of metal is relatively rapid.

Very rapid chilling of the smoke occurs in its short passage'through the duct 5. Such rapid chilling necessarily results in the formation of condensation which is readily carried into the filter bore 6. Accordingly it is necessary because of the high rate of formation of condensation to provide the absorbing filter such as the cigarette l2.

Since the bowl 3 is generally of Wood its heat conducting properties are considerably less than that of the metal barrel, and the limited amount of heat conducted to its outer surface can be dissipated readily by metal conduction through the relatively thin metal wall defining the bore 2 and radiated by the relatively small fins on the barrel adjacent and surrounding that portion in which the bore 2 is formed.

By making the bowl receiving portion of the barrel, the heat exchange portion, and the portion containing the filter bore 8 integral and providing fins as nearly coextensive with the length thereof as possible, a large ai'nount of metal is provided for rapidly conducting the heat from its point of initial heat exchange so that the wall of the duct .is cooled sufiiciently between in= termittent draughts' of smoke therethrough.

Due to the straight through construction of the various bores and-ducts the pipe can easily be cleaned. Due to the external construction, it

can be readily carried in the pocket. As a result clean, relatively dry and cool smoke is obtained at all times;

Having thus described my invention, I claim:

A smoking pipe including an elongated barrel and a mouthpiece detachably connected to said barrel, said barrel being of relatively high heat conducting material and having a generally cylindrical outline, said barrel having a tobacco bowl receiving bore at its outer end and a filter receiving bore at its inner end and a bowl in said bowl receiving bore, and a cooling portion having asmoke duct therein between said ends, said barrel having radially extending fins spaced'therealong for substantially the full length thereof starting from the outer end, the radial extent of the fins and the wall thickness of the barrel bein such as to provide a large diameter bowl receiving bore portion having relatively short radial fins, a smaller filter bore portion having greater radial extent fins and said smoke duct having a smaller diameter than either of said bores and having a wall thickness such that the radial fins therearound have substantially the sameradial extent as those surrounding the filter bore, said'bovil, said barrel and said mouthpiece being coaxial.

EDGAR E. LANCASTER,

References on s in the'file of this patent H 'U'Nl'IED STATES PATENTS Number Name Date 502,992 Phillips et a1 Aug. 8, 1893 986,02 i Odenbaugh Mar. '7, 1911 1,637,984 Bessemer Aug 2, 1927 1,828,149 Maliett Oct. 20, 1931 FOREIGN PATENTS Number Country Date Great Britain 1886

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