US1056049A - Coffee-machine. - Google Patents

Description

G. NELSON.

COFFEE MACHINE.

APPLICATION FILED APR.16, 1909.

1,056,049. Patented Mar. 18, 1913.

- Inventor A torncy COLUMBIA RLANOGRAPH 10., W)\SHINGTDN. D. C

spring fingers.

UNITED STATES PATENT ()FFICE.

CHARLES NELSON, 0F BROOKLYN, NEW YORK, ASSIGNOR T0 S. STERNAU & 00., OF BROOKLYN, NEW YORK, A COPARTNERSHIP COMPOSED OF SIG-MUND STERNAU AND LIONEL STRASSBURGER.

COFFEE-MACHINE.

Specification of Letters Patent.

Application filed April 16, 1909.

Patented Mar. 18,1913.

Serial No. 490,280.

T 0 all whom it may concern Be 1t known that I, CHARLES NELSON, a

subject of the King of Sweden, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented a new and useful Coffee-Machine, of which the following is a specification.

The object I have in view is the production of a coffee machine in which the screen which holds-the coffee or tea, or other sub stance which is to form the basis of the infusion, is secured to the globe in such a manner that, as the globe is removed from the machine, the screen will be lifted out with it.

Other objects I have in view relate to details of structure, resulting in the improvement of the screen.

These and further objects will appear from the following specification and accompanying drawing, considered together or separately.

In the accompanying drawings: Figure 1 is a sectional view of a globe, screen and central tube embodying my invention. Fig. 2 is a sect-ion on the line 2-2 of Fig. 1, and Fig. 3 is a side elevation of the screen, the central tube being omitted.

In all of the views like parts are designated by the same reference characters.

In an application for patent, filed by me on or about February 28th, 1907, Serial No. 359,749, I disclose a structure in which a screen is secured to a globe by means of Such a screen is made of two parts, the bottom being perforated while the walls are imperforate. By my present invention, I seek to avoid the necessity of making the screen in two parts, and I do away with the spring fingers.

In the drawings, 1 represents the globe, having a neck 2, with an annular recess or groove 3 therein, adjacent to the joinder of neck and body. The screen 4 is made of sheet material, preferably sheet metal, and comprises a circular bottom 5, such bottom being slightly larger in internal diameter than the external diameter of the neck. The screen also includes an annular wall 6, such wall being of such an internal diameter as to make a close fit with the neck 2. The upper edge of the wall is provided with a bead or rim 7. Below this rim is arranged a plurality of ears 8. These ears are shown as three in number, although the number,

size and shape of the ears may be varied without departing from the spirit of the invention. I prefer to make the ears by strik ing the wall inward to the proper extent, producing a depression which is flat on top and curved on the bottom,the shape of which is best illustrated in Fig. 3. These ears lie within the annular recess or groove 3, and by their engagement therewith sup port the screen upon the neck of the globe. The engagement of the ears with the groove is sufliciently close to hold the screen in position, but, owing to the pliability of the wall 6, the ears may be disengaged from the groove by a rectilinear movement. I prefer to make the ears three in number and arrange them at equal distances around the periphery of the wall. This permits the ears .to be disengaged by the pliability of the wall,-allowing the portions of the wall carrying the ears to be sprung outward, while the other portions are sprung inward.

I prefer to make the wall and bottom of the screen of a single piece of sheet material, preferably sheet metal, and I prefer to perforate the blank forming the screen before the latter is stamped to shape. The wall will, therefore, be perforated, as shown. This will reduce the expense of manufacture, as the flat sheet is more easily perforated than the complete screen. A greater advantage is that the perforated wall is more pliable made this way than if made of unperforated material. By this means the ears may be longer and the annular groove may be deeper than would be the case if the wall was unperforated. This perforation of the annular wall I regard as important for these reasons, and also for the further reason that it permits the use of immovable ears in place of the movable spring fingers, illustrated in my co-pending application above referred to. The bead 7 on the wall of the screen, I prefer to make without a wire, simply turning the material outward to form the annular bead.

Another portion of my invention consists in the center tube and the means for attaching it to the screen. The center tube 9 passes through an opening in the center of the bottom 5 in the screen. The center of the screen is dished upward, forming a protuberance 10. The tube passes through the opening in this protuberance, and a dished washer 11 and 12 is put upon the tube inside and outside of the bottom, as shown. The inner washer 11 bears against a ridge 13 011 the tube, while the free end of the tube protrudes through the opening in the washer 12. This free end. of the tube may then be turned over with a tool, producinga flange 14,-thus clamping the two washers between the ridge and flange. This provides a rigid attachment of the tube to the screen, and is a structure which is cheap to manufacture. By dishing in the bottom to produce the protuberance 10, the bottom of the screen is flush and, consequently, the device may be placed upon the table or other support and will rest firmly thereon.

In accordance with the provisions of the patent statutes, 1 have described the principle of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is merely illustrative, and that the invention can be carried out in other ways.

Having now particularly described the nature of my invention, and in what manner the same is to be performed, what I claim and desire to secure by Letters Patent is:

1. A coffee machine having a globe with a neck and an annular recess therein, in combination with a screen, said screen having an integral annular elastic wall which surrounds the neck, said wall being perforated and having a plurality of integral cars projecting into engagement with the groove.

2. A. screen for a coffee machine, having an upwardly dished center, a tube passing through such center, washers both inside and outside of the screen, engaging with the tube, and a ridge on the tube inside of the screen, and a flange on the tube outside of the screen, said screen and washers being clamped between the ridge and flange.

This specification signed and witnessed this 8th day of April, 1909.

CHARLES NELSON.

Vitnesses JOHN L. LoTsoH, 11. J. CASEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPatents,

Washington, D. 0.

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