US1288376A - Coffee-percolator with flexible coupling. - Google Patents

Description

.l. B. BLEICHRODE.

COFFEE PE RCOLATOR WITH FLEXIBLE COUPLING. APPLICATION FILED JUNE Ia. I918.

1,288,376. Patented Dec.17,1918.

v 1 [Q1 L z L 1 li o,

IN VENTOR Wjm ATTORNEYS UNITED. STATES PATENT OFFICE.

JACOB B. BLEICHBODE, OF BROOKLYN, NEW YORK, ASSIGNOB '1O CBYSTALPERCOLATOB COMPANY, nm, 015 'NEW YORK, N. Y. A CORPORATION 01' NEWLYOBK.

GOFFEE-IPEBCOLATOR WITH FLEXIBLE COUPLING.

To all whom it may concern:

Be it known that I, Jacoe B. Bummnonn, a citizen of the United States, residin at Brooklyn, in the county of Kings an State of New York, have invented certain new and useful Improvements in Coffee- Percolators with Flexible Couplings, of which the following is a specification.

My invention relates to an improvement in the gasket or flexible coupling used in cofiee percolators which consists of a lower glass bulb and an up er glass bulb having a funnel-shaped mout h projectin into the lower glass bulb, and having a fi ter therein, u on which the coffee rests, during the percp ation.

Percolators of this kind are old and wellknown and the connection between them has customarily been made heretofore by a washer or gasket, whereby a tight fit between the parts was attempted to e secured.

As these bulbs are hand-blown, it is impossible to secure identical dimensions in all the bulbs made, and as a result, experience has shown that the users of these percolators in attempting to fit the funnel-shaped mouth into the ower bulb, crack or break the neck of the lower bulb which requires the replacin thereof.

evices of this kind, which are made of L relatively'fra 'le glass are usually handled by persons w o are inexperienced in mampulating such articles and it is therefore highly desirable to have an efiicient and tight coupling between the bulbs that shall a vidual bulbs, so as to insure a reliable and tight fit between the bulbs, without the dam ger of cracking or breaking in the hands of an inexperienced person.

The object of my invention is to provide a flexible gasket or coupling between the 'bulbs of these glass cofl'ee percolators that shall be reliable, give a tight fit, be automatically tightens during the operation of the device, allow-for the variations in the sizes of the various bulbs and have other advanta which shall be pointed out in the description and drawings.

A preferred embodiment of my invention ow for variations in the sizes of 'indi-' erably about 30 de ees.

Specification of Letters Patent. Patented Dec. 1'1,- 1918.

Application mes Iune 1a, 1918. serial no. 240,071.

, The ercolator vconsists essentially of a glass bu b 5, having a substantially spherical main portion, provided with a neck into which a funnel-shaped mouth 4 of an uppir glass bulb 1 projects. The connection tween the funnel-shaped mouth 4 and the neck of the bulb 5 is made by means of a gasket 6 preferably of fairly soft, flexible rubber. In the upper bulb 1 a filter cloth 2 is mounted on a rigid base which is caused 0 lit tightly against the inner wall of the The exact meansf'or causin the filter cloth 2 to fit tightly in the bul 1 are not shown as these are well-known, and in themselves form no part of my invention. The flexible gasket 6 has a substantially round head 8 which has a substantially spherical contour up to the highest point thereof, and then turns inwardly at a sharp angle of about 45 degrees until it contacts with the intermediate portion 3 of the bulb 1 which is between the main portion of the bulb and the funnel-shaped mouth 4. This intermediate Eortion 3 is tapered so that it 0011'. tacts wit the head 8 at a small part thereof. The curvature of the intermediate ortion 3 is such that the inwardly incllned portion 7 of the head 8 is at a sharp angle to the tangent at the point of contact, pref- This head 8 is stifi'errthan the wa s 9 of the coupling 6,

which form the body portion thereof. be-

cause of its greater thickness and it is made so stiff relatively, that whib it can be stretched to a certain extent in forcing'it upon the bulb 1, it only contacts with the intermediate portion 3 substantially around A the oint of the inclined portion 7, so that whi e the contact is ti ht anldelprevents leakage, it only exists or a atively small area.

At the botom portion thereof the coupling 6 has the walls 9 thereof provided with an inner thickened ridge .10 which is likewise made so rigid that it forms a very tight fit with the funnel 4.

This construction causes the walls 9 of the coupling 6 to be spaced from the adjacent portion' of the bulb 1, so that an 1n-. termediate inclosed cell containing air is formed between the bulb 1 and thecouplin 6.

ence, when the coupling 6 is mounted upon the bulb 1, itcannot be forced up beyond a certain distance on the intermediate portion 3 because of the thickness and stillnem of the head 8.

When the funnel portion 4 is pushed into the neck of the bulb 5, the coupling 6 yields readily because of its flexibility and because it is not in contact with the bulb 1 save at the top and bottom thereof. 7

Because of this, it is possible to push the bulb 1, into the 'bulb 5 sufiiciently far to give a tight fit, without the slightest danger of breaking orcrackingthe delicate glass parts.) Even after the tight fit is secured it 18 possible to move the bulb.1 with respect to the bulb 5, because as shown in Fi 2, which illustrates the structure when tted together, the bulb 1 always has a certain free relative movement with respect to the bulb 5, because it is spaced fromthe cou-' pling -6 except at two small areas of contact. The air between the gasket and bulb 1 always tends to keep the gasket inflated. The walls of the gasket are 'sufliciently'stifi to maintain the shape shown at all times.-

Further advantages arise during the o eration of the'device. In operatin this eviee it is customary tofill the bu b 5 with water, the level of the water not being allowed to rise too near the neck.

Then the bulb 1 with the cou ling 6 connected thereto is inserted until a tight fit is secured.

The filter clo'th 2 havin been put into position and sufiicient pow ered or ground coffee having been placed thereon, the water in the lower bulb 5 is heated by means of an alcohol lamp or any other suitable means. The 11pressure of the steam generated in the unfi ed space of the bulb 5 causes the water therein to rise uglthrough the funnel 4 and up through the ter cloth 2 until the level 0 the water in the bulb 5 is below the mouth of the funnel 4:.

The pressure of the water which has now risen to the upper bulb 1 further forces it into the bulb 5 so as to cause a tight fit.

As soon as the level of the water in the bulb 5 is below the mouth of the funnel 4,

the source of heat is removed and the cooling of the bulb 5 with the consequent condensation of the steam causes the water wardly,

naaasve which has now extracted the soluble sub- .stances from the coffee topass downwardl through the filter cloth 2 into the bulb 5.

'The device may be provided with a cover made'of flexible material comprising a body portion, and projecting spaced from each other an pro ectm mwardly from said bod portion tower the central axis of the ga et. j

2. In combination, a lower bulb having a neck, an upper bulb havmgan opening at arts vertically its bottom adapted to lit in said neck, and

a gasket made of flexible material comprising a body portion and re ecting arts yertically spaced from eac other an projecting inwardly from said body toward the central axis of the asket, said lpg'ojectmg parts being stifieft an said wa 3. In combination, a lower bulb ha a neck, an upper bulb having a downwar y projecting mouth at its bottom, and ada ted to project into said neck, and a gasket upon said upperbulb at its unction with the said neck, said gasket havin a body por-.

and ada 'ttion spaced from said upser b d t nec sai gas e ed to fit tightly into sai also having vertically space parts projecting inwardly tower the vertical axis thereof, and tightly contacting with said upper bulb.

4. In combination, a lower bulb having a neck, an upper bulb having a main portion, a tapered intermediate portion and a downprojecting conically shaped mouth at its wer end adapted topro ect nto said neck, and a gasket fitted upon said upper bulb atits junction with said lower bulb, said gasket having a bed portion comprlsmg relatively inclined w s, and inwardly rojecting walls, w ich contact wi b said intermediate ortion and said mout respectivel said boilly portion being spaced from sai uppe i 5. In combination, a lower bulb ha a neck, an up er bulbhaving a main portion, an interme iate portion and 'a downwardly projectin conically shaped mouth at its a ower en adapted to pro ect into said neck, and a gasket fitted u on said u erbulb at its junction with ai lower b said gasket havin a body portion comprising relaing parts thicker arts above and below said inclined (projecting md above and below them, which tightly :ontact with said intermediate portion and said mouth respectivel said body portion beingI spaced from sai upper bulb.

6. n combination, a lower bulb, an upper bulb having a mouth at its bottom adapted to fit into said lower bulb, and a asket connecting said bulbs, said gasket aving .an

said upper bulb, an from said upfijer said lower bu a body portion spaced 10 bulb and contacting with In testimony whereof I hereunto aflix my signature.

JACOB B. BLEICHRODE.

Images