US1155757A - Muffler. - Google Patents

Description

N. RAPP.

MUFFLER.

APPLICATION FILED MAR. 25. 1915.

3; 1 Patenm 0st. 5

WITNESSES INVENTOR NATHANIEL RAPP, OF TOLEDO, OHIO.

MUFFLER.

Specification of Letters Patent.

Patented Oct. 5, 1915.

Application filed March 25, 1915. Serial No. 16,860.

To all whom it may concern:

Be it known that I, NATHANIEL RAPP, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Mufller; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to mufilers.

It has for its object to provide an eflicient mufiler for reducing the explosive pulsating noise which is caused by the exhaust from explosion or internal combustion engines.

It is particularly adapted for use in connection with automobiles. It however, may be used in connection with any form of an engine wherein it is desired to reduce the noise of the exhaust.

One of the objects of my invention is to provide an eflicient .mufiier which may be produced at alow cost of production. To this end the muffler may be made of sheet iron and the parts may be stamped therefrom by suitable presses. Scrap sheet iron may be used for this purpose which makes the cost of production very small.

The invention may be contained in many forms of mulllers. I have selected one form of a muffler which involves the use of my invention and shall describe it hereinafter as an example of the various forms of structures thatmay be made and, yet, which contain the invention.

The mufiler selected, is illustrated in the drawings wherein-- Figure 1 illustrates a perspective view of the muffler. Fi 2 illustrates a sectional view of the mu er and Fig. 3 illustrates a pers ective and broken view of a part of the mu er showing the interior construction.

1, Fig. 1, of the drawings is a cylindrical shell or casing which is provided with the end disks 2 and 3 which close the ends of the shell 1. The disks 2. and 3 are provided with flanges 4 which may be secured to the ends of the cylindrical shell 1 by spot welding the flanges 4 to the ends of the shell. sleeve which may be inserted in an opening in the end 2. The end 2 is provided with a The inlet 5 of the mufiier is a shortflange 6 which extends over and clenches with the enlarged inner end of the sleeve 5. A tube 7 is secured to the end 3 of the mufl ler and communicates with the interior of the cylinder 1 through an opening 8 formed in the lower edge of the'end 3 of the mufller. The tube 7 affords an outlet or exhaust of the mufiier. The end 3 is also provided with a circular indented portion which is located axially in alinement with the sleeve 5. Spherical shells 20 are also located coaxially with the cell 1, the depressed or indented portion 15 of the end 3 and the sleeve 5. One of the shells 20 is provided with an extension 24 which is flanged between the sleeve 5 and the flange 6. Another of the shells 20 clenches or sets over the edge 16 of the depressed portion 15. The spherical shells 20 are secured together by means of flaring parts 22 which extend into each succeeding shell and over the edge of the openings 23 formed at the poles of the shells- The shells may be formed semi-spherically and clenched together by overlapping edges 21 or by any other suitable means.

The shells are provided with oblong openings 25 which permit the gases that enter the shells to escape gradually into the cylindrical shell or casing 1. The openings 2 are arranged longitudinally around the openings 23 located at the poles of the spheres. The size of the openings 25 is such as to disseminate the pressure which is produced by the exhaust of the engine which is connected to the sleeve 5 and allow the ases to gradually pass into the cylinder 1.

bus the gases pass out through the outlet 7. lVhen the explosion takes place, the gas enters the first sphere 20 and the liberation permits the gas to form naturally into a spherical form. Ordinarily it would form a size larger than the sphere 20. The pressure, however, carries the gas liberated by the explosion into the next sphere through its opening 23 in which the succeeding sphere is secured by the flaring flange 22. Here again the gas partakes of the spherical form as it escapes through the opening 23. The gas pressure is reduced by its escape through the oblong openings 25 'found also in this sphere. The gas again being confined escapes through the opening of the second sphere into the third sphere where it again takes of the spherical form as it passes from the confinement of the second sphere and part of it escapes through the openings :25 contained in that sphere and so the operation is repeated until by the time the gas reaches the last sphere 20 the explosive action is reduced to nil and all of the gas has escaped through the openings 25. The cross area of the cylinder 1 less the area of the major circle of the sphere is much larger than the inlet opening through the sleeve 5. The annular opening or space between the spheres and the shell 1 is therefore more than sufficient to take care of the gases which enter into the muffler. The gaseswhich escape through the openings of the spheres are thus delivered to the outlet of the muffler in a substantially uniform current. my

The construction selected and described may be greatly varied in the arrangement and manufacture of its parts and in the substitution of elements having equivalent functions and such modifications may be used for many varied purposes and still contain the invention. I

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is,

1. In a muffler, the combination of a cylindrical shell, a plurality of hollow spheres located within the shell and in spaced relation with respect to the shell and having large openings at the poles of the spheres and along the aXis of the shell and smaller openings arranged longitudinally around the spheres the muffler having an inlet connected with the interior of the first sphere through which the gases enter into the muffler, the outer end of the end sphere being closed, the muffler having an exhaust opening located in the end of the shell opposite to the end having the inlet opening ing communications between the spheres, I

the muffler having an inlet opening communicatingwith the interior of the first sphere, the last of the spheres being closed, the spheres having oblong openings extending and arranged longitudinally which allow the escape of gases into the shell, an exhaust opening located in the shell and without the end sphere.

3. In a mufller, the combination of a cylindrical shell, a plurality of spherical shells located within the cylindrical shell and having polar openings forming thereby a continuous passageway through the spherical shells, the spherical shell at one end having an inlet opening, the other end one of the spherical shells being closed, the spherical shells having. oblong openings extending longitudinally which allow gases to escape into the cylindrical shell, the muffler having an outlet located in the end of the cylindrical shell opposite to the end having the inlet to the first spherical shell and without the end spherical shell.

p In testimony whereof, I have hereunto signed my name to this specification NATHANIEL RAPP.

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