US714128A - Exhaust-muffler. - Google Patents

Description

Ptenieu Nov. 25, |902.

No. 7|4,|2a.

w. BARBER. EXHAUST MUFFLER.

(Appliction le'd Jan. 23, 1902.) v

(No Model.) 3 Sheets-Shet I.'

INVENTOR ql WMM WITNESSES Patented Nov. l25, |9u2.`

N0. 7|4,l28. M W. BARBER.v

EXHAUST muFFL'En.

(Application Bled Jan. 23, 1902.) (No Nudel.) 3 Sheets-V-Sheat 2.

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NQ; 714,128. Y Patented Nov. 25, |2902."

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(Application filed Jan. 23, 1902.)

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1A UNITED STATES PATENT OFFICE.

WILLIAM BABBER, OF BROOKLYN, NEW YORK.

EXHAUST-MUFFLER.

SPECIFICATION forming part of Letters Patent No. 714,128, dated November 25, 1902. Application led January 23, 1902. Serial No. 90,925. (No model.)

To @ZZ whom it may concern.-

Beit known that I, WILLIAM BARBER, a citizen of the United States, residing at the borough of Brooklyn, in the county of Kings, city and State of New York, have invented a certain new and useful Improvement in EX haust-Muftlers, of which the following is a specitcatiomsuch as will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is to provide an exhaust-muffler of small bulk, of an exceedingly simple and cheap form of construction, which when in use will mnffle the sound of exhaust-gases admitted to the air by way of.

. the same and which Will also tend to reduce 'exhaust-pipe, with a plurality of small peripheral perforations arranged in a spiral line around the same from adjacent to the inlet end of such pipe to within about one-fourth vof its length from the closed end. Around this is' coiled under tension a spiral spring of any suitable resilient spring-wire, the coils of which register with the perforations, so as to bafle the gases issuing therefrom. Parallel with this tube are arranged similar perforated tubes provided with likev perforations and baflling-springs, which are in free communication with the atmosphere at one or both ends, all of which tubes are inclosed in a tight casing in such manner that the gases pass from the inlet or central tube through the perforations into the casing, thence by the like perforations into the outlet-tubes, in each case impinging upon the baftling-springs,from the ends of which outlet-tubes they escape intothe atmosphere, although it is not to be understood that my invention is necessarily limited to a device necessarily comprising at once all the devices and partsbefore menpipe 4 of the motor-engine.

tioned, as such invention consists in the particular construction of certain devices and parts and the combination and arrangement `of certain devices and parts, all as hereinafnate like or equivalent parts wherever found throughout the several views, and in Which- Figure l is an exterior View, looking from the side and toward theoutletend ot' the same, of my improved I'orln of exhaust muffler. Fig. 2 is a View thereof in central longitudinal section. Fig. 3 is a View thereof in cross-section on the line com of Fig. 2. Fig. 4 is aV View similar to Fig. 3, save that the same is taken on the line y y, the observer in each case looking in the direction of the arrow in Fig. 2; and Fig. 5 is a view, partially in longitudinal section, of a mufer of a slightlymodiiied form of construction from that shown in the preceding figures.

motor being usually of about two centimetersin interior diameter and of about twenty-five centimeters in length, the other parts being of about the relative dimensions thereto shown in the drawings. Such tube or inletpipe l is provided at either end with a male screw-thread, `one of which receives a cap 2, by which such pipe is tightly closed at that end, and the other a threaded thimble 3, by which connection is made with the exhaust- Surrounding such pipe l and held in place by end plates 5 and 6, which abut, respectively, against the cap 2 and thimble 3 upon the inner side, as shown, is an annular closed casing 10, within which are arranged parallel with and surrounding the inlet-pipe l the outlet pipes or tubes 7,'Which are usually three in number, as shown, and the ends of which tit into suitable recesses 8, formed in the end plates 5 and 6 to receive them, and such outlet tubes or pipes 7 are in free communication with the IOO atmosphere by way of holes formed in and through the end plate 5 so as to register' therewith when in position, as shown at 1l, and sometimes also by way of similar holes in the end plate 6, as s hown in dotted lines at 1l' in Fig. 2, and the end plates 5 and 6 are usually each `provided with an annular flange 9, which fits snugly around the end of the casing 10, so as to form a tight joint therewith. All of the parts before mentioned are formed of cast or other metal and may of course be worked into proper shape in any way.

Each of the pipes or tubes 7 and also the inlet tube or pipe 1 are provided with a plurality of small holes or perforations formed in and through the peripheral wall thereof, as shown, which are usually arranged, as Shown, in a spiral line which winds around such tube to about three-fourths of the distance from the end plate 6 at the inlet end of the device, leaving those portions of said tubes 1 and 7 lying nearest to the plate 5 without any perforations, as shown. These perforations, which are numbered 12 in the drawings, are usually of the circular form shown, and in any event their arrangement is such that the baffling-springs 13, one of which encircles each of such tubes, will when in position partially cover such perforations, which form the sole passage for the exhaustgases from the inlet-pipe 1 into the casing 10 and from the casing 10 into the outlet pipes or tubes 7, and such springs 13 are formed of any suitable highly-resilient material, such as steel or hard brass, and are held under tension of some slight degree upon their respective tubes in any desired manner, usually by passing the ends thereof through holes in the same and then clenching the end of the wire down against the tube, as shown in Figs. 2, 3, and 4 at 14 and 15, but are sufficiently largerin diameter than the tubes which they inclose to be able to vibrate freely when at rest, the wire out `of which the same is formed being always in registry with the gas passages or perforations 12, as shown. Usually ordinary round springwire, such as that shown, is used out of which to form the springs 13; but flat wire or, in fact, wire of any cross-section may be used.

The operation of the device is as follows: As soon as the exhaust-gases are forced into the inlet pipe or tube l they pass clear to the end of the tube, where the unperforated portion of the tube forms an air-cushion chamber, which causes a series of oscillations back and forth of the compressed gases so rapid as to be almost incalculable, but sufficient to cause the same to flow out at right angles by slow degrees through the perforations or passages 12, on passing through which the small jets of gas impinging against the resilient wire of the springs 13 are baffied in their outfiow to a certain extent, thereby putting such springs into rapid vibration, a phenomenon which is also repeated in the passage of such gases into the tubes 7, from which they at last find their way to the atmosphere by way of the end outlet-orifices 11.

In the modified form of construction shown in Fig. 5 I have shown a somewhat simpler form of exhaust-muffler of myimproved type, which may in many cases be used with good eect, wherein the outlet-tubes 7 are omitted, the inlet-tube 1 being retained and the gases passing from such tube by way of the gaspassages 12, by the baffiing-spring 13 directly into the casing 10, from which they escape into the atmosphere by way of orifices 16, formed in the end plate 5, and by like orifices or passages 17, formed in the peripheral wall of the casing 10, as shown, one or both of which outlets may be used, as may be desired.

Many modifications other than those shown and described may be made without departing from the scope of my invention, and I do not intend to limit myself to the exact constructions set forth; but,

Having now particularly described my said invention,its construction and operation,what I claim, and desire to secure by Letters Patent, is-

1. An exhaust-muffler provided with an inlet pipe or tube having perforations in its peripheral Wall, and a baffling-spring of resilient material coiled around the inlet pipe or tube in such manner that the gases as they emerge from the peripheral perforations or passages will impinge upon the spring, substantially as shown and described.

2. An eXhaust-muffier provided with an inlet pipe or tube having perforations in its peripheral wall, and having at its extreme end a portion having an imperforate peripheral wall and end so as to form a cushioning-chamber, and a baffling-spring of resilient material coiled around the inlet pipe or tube in such manner that the gases as they emerge from the peripheral perforations or passages will impin ge upon the sprin g, substantially as shown and described.

3. An eXhaust-muffier provided with an inlet-pipe provided with gas-passages formed in the peripheral wall, an outlet-pipe located adjacent to, outside of, parallel to, and non-concentric with the inlet-pipe also provided with like perforations or gas-passages in its peripheral wall and in communication at the end with the atmosphere, and a casing inclosing the inlet and outlet pipes in such manner that the gases on their way to the atmosphere pass through the peripheral passages of both the inlet and outlet pipes, substantially as shown and described.

4. An exhaust-muffler provided with an inlet-pipe provided with gas-passages formed in the peripheral wall, an outlet-pipe located adjacent to the inlet-pipe also provided with like perforations or gas-passages in its peripheral wall and in communication at the end with the atmosphere, a coil-spring of resilient ma- .terial surrounding the inlet-pipe, and a like spring surrounding the outlet-pipe, and a closed casing surrounding the inlet and out- IOO IIO

let pipes, the construction and arrangement being suchA that the gases on passing out of the peripheral perforations or gas-passages of the inlet-pipe and into the like passages of the outletpipe, will be retarded or bafiied by the springs, substantially as shown and described.

5. An exhaust-muffler consisting of an exterior casing, an inlet-pipe provided with gaspassages in the peripheral Wall surrounded by the casing, a coil-spring of resilient material surrounding the inlet-pipe, a plurality of outlet-pipes located within the casing parallel to and on dierent sides of the inlet-pipe provided With like peripheral gas-passages and in communication with the atmospherel by way of orifices in registry with the open ends thereof lin the end Wall of the casing, and a bailing spring of resilient material coiled around each of such inlet and outlet pipes so as to baffle the ow of gas through the peripheral gas-passages, substantially as shown and described,

6. In an eXhaust-muflier, the combination.

with an annular outer inclosing shell forming the peripheral Wall of the exterior casing, of an end plate provided with a central orifice adapted to fit over one end ofthe shell, a similar end plate provided with a like central oriice and also with a plurality of perforations concentric thereto adapted to fit over the other end of the shell, outlet-tubes openat the ends similar in number to the outer perforations peripheral Walls thereof arranged in a spiral line, an inlet-pipe also perforated in like manner with an imperforate portion adjacent to the end plate having the outer perforations passing through the central orifices of the end plates and secured thereto and securing the end plates to the ends of the shell forming the exterior casing by a screw-threaded cap at the imperforate end and a screw-threaded thilnble at the other, and a spiral bafflingspring seeured at the ends within the casing surrounding each of the inlet and outlet tubes or pipes in such manner that the Wire forming the same registers with the line of spiral peripheral holes thereof, substantially as shown and described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

WILLiAMv BARBER. i

Witnesses:

C. L. DAVIS, A. S. BARBER.

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