US718131A - Muffler for gas or gasoline engines. - Google Patents

Description

PATENTED JAN 2 SHEETS-$112111 1.

J. F. KURTIS & H. E. MILLER.

APPLICATION FILED JULY 21, 1902.

MUFFLER FOR GAS 0R GASOLENE ENGINES.

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H0 MODEL.

No. 718,131. PATENTED JAN. 13, 1903. J. F. KURTIS 3 H. F. MILLER. MUFFLER FOR GAS 0R GASOLENE ENGINES.

APPLICATION FILED JULY 21, 1902.

2 SHEETS-SHEET 2.

10 MODEL.

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UNITED STATES PATENT OFFICE.

JOSEPH F. KURTIS, OF SPRINGFIELD, AND HERMAN F. MILLER, OF DAYTON, OHIO, ASSIGNORS TO GEORGE J. IHRIG AND ERNEST O. IHRIG, OF SPRING FIELD, OHIO.

MUFFLER FOR GAS OR GASOLENE ENGINES.

$PECIFICATION formingpart of Letters Patent No. 718,131, dated January 13, 1903. Application filed July 21, 1902. Serial No. 116,329. (No model.)

T all whom, it 727/(by concern.-

Be it known that we, JOSEPH F. KURTIS, residing at Springfield, in the county of Clark, and HERMAN F. MILLER, residing at Dayton,

in the county of Montgomery, State of Ohio, citizens of the United States, have invented certain new and useful Improvements in Muffiers for Gas or Gasolene Engines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to mufflers for gas and gasolene engines or for engines of the same general type known as explosive or internal-combustion engines, although the device is also capable of use in connection with steam-engines or the like.

The invention has for its object to do away with the noise of the exhaust and to render the operation of the engine noiseless in so far as this feature is concerned.

To this end our invention consists in certain novel features, which we will now proceed to describe, and will then particularly point out in the claims.

In the accompanying drawings, Figure 1 is an elevation of a mui'iier embodying our invention in one form. Fig. 2 is a vertical central sectional view of the same. Fig. 3 is a transverse sectional view taken on the line x at of Fig. 2 and looking in the direction of the arrows. Fig. a is a transverse sectional View taken on the line (1 y of Fig. 2 and looking in the direction of the arrows. Fig. 5 is 5 a sectional view taken on the line 22 of Fig. 2 and looking in the direction of the arrows, and Fig. 6 is a detail sectional view taken on the line a a" of Fig. 2 and looking in the direction of the arrows.

40 In the said drawings, 1 indicates the exhaust-pipe, which is provided with a checkvalve 2, which opens freely to the exhaust, but prevents any reflux of the pressure towardtheengine. Tothisexhaust-pipeisconnected the muffler (indicated as a whole by the reference-numeral 3) and comprising a receiving-head 4-, an intermediate body portion 5, a discharge-head 6, and an outlet or exhaust head 7. The receiving-head 4: consists of acup-shaped or bowl-like portion 8, having a threaded receiving-mouth 9, by means of which it is connected to the end of the exhaustpipe 1. Beyond this receiving-mouth the part 8 increases in diameter, its larger end being provided with a seat 10 to receive a plate 11, which closes the larger end of the cup or bowl and which is provided with a conical boss 12, extending into the same and having a threaded aperture 13. In this threaded aperture tits the correspondingly-threaded stem 6o 14 of the inlet-regulating cone 15, which extends down into the contracted mouth of the receiving-head and serves by its adjustment to regulate the inlet-opening of the muffler, while at the same timeits conical shape serves to deflect the exhaust-gases outward, as indicated by the arrows. To render the regulation more effective, the broader end of the cone 15 is provided with a flange 15, having notches 15 while the bowl 8 is provided with a cooperating shoulder or seat 8 The space within the receiving-head 4: between the bowl 8 andboss 12 is occupied by a series of diaphragms 16, constituting baffleplates. Any desired number of these diaphragms or baffle-plates may be employed, and in the present instance we have shown four such plates, each extending from the part 8 to the part 12 and closing the passage between the same, except as hereinafter indicated. Each plate is provided at either its inner or outer margin with an opening 17, formed by cutting away the material of the plate and opening up the cut-away portion, as indicated at 18, to form a deflector-plate, standing immediately adjacent to the opening 18 and at right angles to the body of the baffle-plate. These openings 18 are located alternately at the outer and inner margins of the successive plates, so that the exhaust- '0 gases passing through the openings near the outer margins must then pass between the baffle-plates to the openings in the inner margin of the next plate. It will be observed that each deflector-plate stands on that side of its opening toward which the. gases must move to reach the opening in the next plate, and said deflector-plates are preferably of stance.

such size as to extend from one plate to the next, as shown. In this way the gases after being caused to diverge outwardly by the regulating-cone are caused successively to pass toward the inner and outer walls of the receiving-head, the deflector-plate serving to divert them from a direct course from one set of apertures to the nearest apertures of the next diaphragm, so as to cause a circulation through all the parts of each space between any two successive baffle plates or diaphragms.

The discharge-head 6 is similar in construction to the receiving-head, but reversely arranged. It consists of a cup-like or bowl-like body portion 19, having its larger end closed by a plate 20, having a conical boss 21 extending into the interior of the cup or bowl, said cup or bowl being provided with an outlet-opening 22 in its smaller end. The space between the conical boss and bowl is filled by diaphragms 23, of which any desired number may be employed, they being provided alternately on their inner and outer margins with openings 24 and deflecting-plates 25, formed by bending up the part of the dia phragm cut away to form the opening.

The receiving and discharge heads are connected by bolts 26 and are spaced apart by a cylindrical casing 27, which fits at one end in the seat 10 of the bowl 8 and at the other end in a corresponding seat 28 in the bowl 19. Within this casing the receiving and discharge heads are connected by means of pipes 29, of which any desired number may be employed, three being shown in the present in- The plate 11 is provided with apertures 30, surrounded by collars 31, while the plate is provided with corresponding apertures 32, surrounded by collars 33. Each pipe 29 is preferably made in two sections, havinginterposed between their meeting ends a diaphragm 34, having a plurality of relatively small apertures 35, as shown more particularly in Figs. 2 and 3. These diaphragms are held between the meeting ends of the pipe-sections, which are clamped together by the bolts 26, the ends of the pipe-sections fitting in the collars 31 and 33, respectively. In order to form a proper union between the pipes, one section may be provided with an enlarged mouth or bowl 36, into which the end of the other section fits, as shown in Fig. 2.

It will be seen that the exhaust-gases after passing through the receiving-head are conducted by the pipes 29 to the discharge-head, passing through the apertured diaphragms 34 on their way, and in passing through the discharge-head the gases are again deflected first inward and outward and caused to circulate thoroughly through the spaces between the baffle-plates by reason of the construction of said baffie-plates, the location of their openings, and the location of the deflecting-plates.

The outlet-opening 27 of the dischargehead communicates with the outlet-head 7,

which comprises a body portion or wall 37, preferably circular in cross-section and of outwardly-increasing diameter. Internally it is provided with a cup-shaped apertured diaphragm 38 immediately adjacent to the outlet-mouth 27 of the discharge-head, and the diaphragm or baflie-plate 23 within said discharge-head nearest to said outlet is provided with a central discharge-opening 39. (Shown more particularly in Fig. 6.) Outwardly from the cup-shaped perforated diaphragm 38 the outlet-head is provided with diaphragms 40 and 41, the former of which has a central opening 42, while the latter is provided with marginal openings 43 and deflecting-plates 44. Outwardly from the diaphragm ,41 there is provided acup-shaped diaphragm 45, having marginal serrations 46, forming in conjunction with the body 37 spaces adjacent to the outer wall of the outlet-head, through which the products must pass. Still outwardly beyond the diaphragm 45 is located an aperturedplate 47, of less diameter than the body 37 of the outlet-head, so that the escaping gases may pass not only through said plate 47, but also around the margins thereof. These several parts are held in position by a threaded rod 48, mounted in the conical boss 21 and extending outward through the outlet head, the several diaphragms 38, 40, 41, 45, and 47 being mounted on said threaded rod, which latter is provided with a nut 49, which holds the several diaphragms in place and also holds the conical body 37 in place by'reason of the pressure of the margins of the diaphragms on the inner wall of said body. The threaded rod 48 carries at its outer end an exhaust-regulating cap or closure 50, having a central threaded socket 51 to receive the end of the rod and having outlet-apertures 52, grouped around said central socket. The cap or closure is provided with a flange 53, extending into the body of the outlet-head and having outletapertures 54 therein, which may be closed to a greater or less extent, or entirely by turning the cap upon the threaded rod, so as to cause the body of the outlet-head to extend over said apertures to a greater or less eX- tent. The exhaust-gases after passing from the discharge-head are further deflected and subdivided in their passage through the outlet-head, so that their final escape through the apertures 52 and if desired or necessary also through the apertures 53 is noiseless.

It will be observed that we have provided a muffler having means for regulating the admission of the exhaust-gases and also means for regulating the escape of said gases after passing through the muffler, so that by a proper adjustment of these regulating devices the muffler may be caused to operate successfully under varying conditions. By

reason of the retardation and subdivision of the exhaust-gases in their passage through the muffler their final exit is practically noiseless, while at the same time the structure is IIO such that no back pressure is exerted upon the engine. The entire structure is so organized that it may be readily taken apart and as readily assembled for purposes of inspection and repair.

We do not wish to be understood as limiting ourselves strictly to the precise details of construction hereinbefore described, and shown in the accompanying drawings, as it is obvious that these details may be modified without departing from the principle of our invention.

Having thus fully described ourinvention, what we claim as new, and desire to secure by Letters Patent, is-

1. A muffler comprising a receiving-head adapted to be connected with the exhaustpipe and provided with internal baffle-plates and with means for regulating the admission of the exhaust-gases, a discharge-head also provided with internal baffle-plates, a plurality of pipes connecting the receiving and discharge heads, and means for regulating the escape of the exhaust-gases after passing through the discharge-head, substantially as described.

2. A muffler comprising a receiving-head adapted to be connected with the exhaustpipe and provided with internal baliie-plates and with means for regulating the admission of the exhaust-gases, a discharge-head also provided with internal baffle-plates, a plurality of pipes connecting the receiving and discharge heads, each pipe being provided with a perforated diaphragm, and means for regulating the escape of the exhaust-gases after passing through the discharge-head, substantially as described.

3. A mufliler comprising a receiving-head adapted to be connected with the exhaustpipe and provided with internal baffle-plates and with means for regulating the admission of the exhaust-gases, a discharge-head also provided with internal baffle-plates, a plurality of pipes connecting the receiving and discharge heads, and an outlet or exhaust head connected with the outlet of the discharge-head, provided with internal baffleplates and having an adjustable cap or closure to regulate the final escape of the exhaust-gases, substantially as described.

4. In a muffler, a head comprising a bowlshaped body having relatively large and small openings at its opposite ends, a plate closing the outer end having openings and a central conical boss extending into the bowl, and annular baflie-plates fitting atintervals between the boss and bowl and provided alternately at their inner and outer margins with cutaway portions, and upstanding deflectingplates adjacent to the margins of the openings toward which the gases move, substantially as described.

5 In a muiiier, the combination, with a receiving-head having a bowl-shaped body and an apertured cover with a central boss and separated diaphragms having openings at their alternate margins and adjacent deflecting-plates, of a conical regulating and deflecting cone adjustably mounted in the inlet-opening of the receiving-head, a similar reverselyarranged discharge-head provided with similar baffie-plates, pipes connecting the receiving and discharge heads and provided with apertured diaphragms, an outlet or exhaust head connected with the outlet-opening of the discharge-head and provided with internal baffie-plates, and an adj nstable cover or closure for the discharge-mouth of the exhaust-head to regulate the outlet thereof, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

JOSEPH F. KURTIS. HERMAN F. MILLER.

Witnesses to signature of Kurtis:

E. O. HAGAN, IRVINE MILLER.

Witnesses to signature of Miller:

G. A. WIKE, ERWIN SoHwARz.

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