US806714A - Exhaust-muffler. - Google Patents

Description

No. 806,714. PATENTED DEC. 5, 1905 J. M. PORTER.

EXHAUST MUFFLER.

APPLICATION FILED 11111.30, 1905.

75 3111mm fez wills Lemma W UNITED STATES PATENT OFFICE.

JOHN M. PORTER. OF PARKERSBURG, WEST VIRGINIA, ASSIGNOR OF ONE- EIGHTH TO JOHN F. LAIRD, OF PARKERSBURG, WEST VIRGINIA.

EXHAUST-MUFFLER.

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed March 30, 1905. Serial No. 252,842.

To all whom/it pea/y concern:

Be it known that I, JOHN M. PORTER,a citizen of the United States, residing at Parkersburg, in the county of Wood and State of West Virginia, have invented certain new and useful Improvements in Exhaust-Muffiers; and I do 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 drawing, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to mufflers, and has for its object to provide a device of this class which is particularly efiicient in deadening the sound of explosions from internalcombustion engines.

With this object in view my invention consists in the novel construction of the cells or cylinders of the device, and particularly in the construction providing for air-cushioning the exhaust passing into the muiiier.

Referring to the accompanying drawing,t he figure illustrates avertical section of the muffler, in which 1 indicates the device, and2 the pipe into which the exhaust is led. The inner end of said pipe is provided with a perforated cap 8, having perforations of sufiicient number and size to prevent back pressure. The exhaust passing from said pipe enters the cell or cylinder 4:, the top 5 of which is at quite a distance from the end of the pipe 2, thereby forming an air-cushioning chamber 6 for the exhaust. The exhaust striking this cushion takes the direction of the arrows and passes down to or near the bottom of said cell or cylinder 4 and out into the larger cell or cylinder 7 through a series of perforations 8, passing up to the top of said larger cell or cylinder 8 and out through the perforated top 9, where the exhaust is again air-cushioned in the chamber 10, formed in the top of the outside cell or cylinder 11, said outside cell on cylinder 1 1 having its cap 12 considerably above the perforated top 9, as shown. The exhaust striking this air-cushion takes the direction of the arrows and passes down to the bottom of said cell or cylinder and out through the perforations 13 into the atmosphere.

As is clearly shown, the base 14 of the muffler is substantially cone-shaped and is provided with a series of horizontal platforms 15, which form the bottoms of the several cells or cylinders, while the vertical walls 16 of said base form a rigid bearing and support for the cells or cylinders, said cells or cylinders being passed down over the said walls 16, to which they may be secured in any suitable manner.

Having thus fully described my invention, I do not wish to be understood as limiting myself to the exact construction herein set forth, as various slight changes may be made therein which would fall within the limit and scope of my invention, and I consider myself clearly entitled to all such changes and modiiications.

hat I claim as my invention, and desire to secure by Letters Patent of the United States, is

1. A muffler comprising a series of cells or cylinders arranged one within the other, each inside cylinder being of a smaller diameter and of a shorter length, substantially as described.

2. A muifler comprising a series of cells or cylinders arranged one within the other, said cells or cylinders having a common base and independent tops or caps, substantially as described.

3. A muffler comprising a series of cells arranged one within the other, said cells or cylinders having independent tops or caps, sub stantially as described.

4. A mufiier comprising an inner cell or cylinder into which the exhaust is led, said inner cell or cylinder having one end closed and provided with an opening near its other end, a cell or cylinder inclosing said inner cell or cylinder into which the exhaust passes from said inner cell or cylinder, said inclosing cell or cylinder being provided with an opening at one end, a second inclosing cell or cylinder into which the exhaust passes from said inclosing cell or cylinder, said second inclosing cell or cylinder'having one end closed and provided with an opening to allow the exhaust to pass therefrom, said inclosing cell or cylinder being of a larger diameter and longer than said inner cell or cylinder, substantially as described.

5. A muffler comprising an inner cell or cylinder having a closed end against which the exhaust strikes, an inclosing cell or cylinder constructed to receive the exhaust from said inner cell or cylinder, one end of said inclosing cell being provided with an opening through which the exhaust passes, a second inclosing cell having a closed end against which the exhaust strikes passing from said inclosing cell, substantially as described.

6. A muflier comprising an inner cell havmg a closed end forming an aircushion against which the exhaust strikes, an inclo sing cell having one of its ends provided with an opening through which the exhaust passes, and a second inclosing cell having one of its ends closed and constructed to form therein an aircushion beyond the end of said inclosing cell against which the exhaust strikes passing from said inclosing cell, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN M. PORTER. Witnesses:

ALBERT KooTz, AGNES M. REILLEY.

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