US2222948A - Tobacco pipe - Google Patents

Description

Nov. 26, 1940.

.32 i /Z 1| Z5 /5J Filed April 6, 1959 Z0 ffl.

f ATToRNEY,

Patented Nav; se, v1940 i. sass VrrET orties ai a. nena-l srl, f i on e, iosa, (n. isi-sei) My invention relates to improvements in tobacco pipes.

The object of my invention is to provide an inexpensive pipe having an edectlve saliva trap s associatedwith a 4 suitable screen to prevent the' tobacco from reaching the saliva or from settling into the cavity withwhich the pipe stem communicates. v Y

l In the drawing:

Figure 1 is a sectional view of my improved pipe.

'Figure 2 isa perspective view of the tobacco supporting screen, drawn to an enlarged scale.

H.- Below this 'cavity I provide a cylindrical cavity i2 with which the tubular pipe stem It g5 communicates'. This pipe stem has a 'reduced inner end tted to a bore extending laterally through the wall of the bowl i@ to the cavity i2.

' The interiorsuriace of the cylindrical cavity i2 has its lower portion provided with an anm nular shoulder i8, below which the cavity is enlarged to receive the annular hub or reduced end portion it of a bottom cap it. When the reduced portion is pushed into the cavity, a shoulder ii on the cap contacts with the lower end of the bowl or pipe. body IS. The bottom cap i8 has a trap cavity 2t.- The cavities i2 and 2t are normally separated by a plate 2i, which preferably has the form of a disk provided with a peripheral notch 22. 'Ihe central portion oi the disk is slitted to provide a three-sided opening 2l, and the material partially released by slitting the disk is pressed downwardly to form a bame lip 2B.

When the cap i8 is withdrawn, thevdisk 2i will u be retained inposition by a headed pin 28 receivable in the notch 22, Vwhereby the disk may be rotated to engage one vmargin of the notch underneath the head o! the pin, as best illustrated in Figure 1.v The notch may be sumciently u large to receive the head of the pin preparatory to the rotative anchoring movement, or, i! desired. the plate may beslightly tilted while it is beine inserted, thus permitting its notched por-- tion to slide underneath the head of the pin a while .the plate is being pushed to its normal horiwhich are preferably 'conically tapered, atleast in the lower portion of the cavity zontal position. Particles oi' tobacco or o! ash which are l enough to pass thrh the apertures in the screen Il are too mi. to clog the bore of the pipe stem. and while these particles may drop to the at plate 2l they cannot s clos the opening 21, this opening located at the opposite side of the cylindrical cavity` orbore l2 from that at which suction is applied through the stem. 'Therefore this o is continuo eiective for the delivery of saliva into the trap regardless of. accumulations of and small particles oi tobacco on the fiat portions of the plate, or even on the downwardly inclined lip en suction is applied the exnding air in the trap 2@ pushes the accumulated particles away fromthe opening 2, and therefore prevents a clogging of the, opening. y Another plate te, provided with apertures di, separates the tobacco cavity il from the suction cavity i2. This plate may also be formed ci sheet metal having downturned margins cut to form spurs 82, which enter the cavity l2 and bear against its side walls, as clearly shown in Figure 1'. The screen 3@ prevents the tobacco from enter- .ing the cavity i2 and clogging the bore of the pipe stem. The baille plate 2i, with its downturned bane 2t, prevents saliva and condensed vapor from being drawn upwardly from the l cavity 2@ under 'suction applied to the stem.

It desired, the bame may be formed of re silient material adapted to serve as a valve when suction is applied to the stem I3.. But I have found that this is not necessary, since the bame y will prevent the return of saliva until the accumu- 35 lations reach it, at which time, or before, the cap i8 will ordinarily be removed andv emptied. I preierablyemploy a cap having a reducedaend, slightly tapered. and in pressed-nt relationship tothe emerged end of the cylindrical bore in the bowl or body il. v j

I have found that valves are apt to become corroded and clogged. A valve of the type disclosed may serve as a baille if it is open when itl ceases to function as a valve. but if it ceases to function when closed, the trap becomes inoperative. Any type of valve is more expensive than the baille, and any non-corrosive material may be used in forming the plate 2| regardless of its resiliency.

My improved pipe can be constructed at less expense than any trap containing pipe oi which I amaware, and` it is more eillcientfor the purposes above set forth than the more' expensive pipes. -It is also more sanitary. due to the acilisof ty with which ali the parts may be cleansed by withdrawing the bottom cap and pushing upwardly on the screen l0- with a lead pencil or other tool.

'I'he suction cavity is always open and the' tobacco is kept dry. vAlso, there is no return of saliva through the stem until the trap cavity 2l becomes iilled.

It will be observed that the'deector 25 inclines downwardly andaway from that side ci` the suction cavity with which the stem II communicates. While this is not essential, I 'prefer to incline the baiile in that general direction.

I annua ALVIN n. HEumrrzscH, sn.

' suction.

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