US1317858A - Mary c - Google Patents

Description

l. M. BROWN.

M'UFFLER.

APPLICATION man murio. una.

1,317,858. Patented om. 7,1919.

THB ooumlu mmnilmn cn.. WASHINGTON. u. c.

UNITED STATES PATENT OFFICE.

JAMES MILTON BROWN, OF GROVE CITY, PENNSYLVANIA; MARY C. BROWN ADMINISTRATBIX 0F SAID JAMES M. BROWN', DECEASED.

IE'UFFLER.

Speeication of Letters Patent.

Patented Oct. 7, 1919.

Application led July 10, 1918. Serial No. 244,149.

To all whom it may concern.'

Be it known that I, JAMES M. BROWN, a citizen of the United States, residing at Grove City, in the county of Mercer and State of Pennsylvania, have invented certain new and useful Improvements in M uffiers; 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.

This invention relates to mullers for exhaust ases, and has for its object to provide a simp e, practical and elicient device of the character described, which practically elimlnates the noises produced by exhaust gases under pressure, such as emanate from internal combustion engines and other motors employing gaseous pressure, without producing any back pressure 1n the motor. To these ends the invention comprises a cham ber having an inlet adapted to be attached to the exhaust port or pipe of an engine or the like, and an outlet at the opposite end of the chamber, said chamber being formed of inner and outer walls, preferably conical in shape, so disposed that the cross sectional area of the chamber increases from the inlet to the outlet, and the walls of the chamber converge toward the outlet, with means adjacent the outlet to change the direction of flow of the escaping gases and deliver the same into a recess or chamber, which 1s preferably defined by a concave plate or septum, located within the mner wall or conlcal member, the parts bein so constructed and arranged that the ex aust gases are gradually expanded and conducted 1n a gradually thinning la er n contact with the inner and outer wa s, which produces a rapid dilusion and dispersion of the heat of the gases, said gases belng turned back- Ward and inward toward the center of the muilier, which may be termed the .collision chamber, Where the said gases enterin from all directions collide and are ther. ly deprived of their kinetic energy and ultimately pass out of the mufller Without noise Vand without the production of back pressure.

The invention illustrated in the accompanying drawing, shows the muiller in vertical cross section.

Referring to the drawing, 1 indicates the exhaust pipe of the internal combustion motor or other gas operated engine or apparatus, to the end of which the muilier is adapted to be attached by any suitable means. The body of the mulller comprises an outer conical member 2 and an inner conical member 3, which are in axial alinement with cach other and which constitute inner and outer walls of an annular, generally conical chamber Ll. The pitch of the inner cone 3 is made somewhat less than that of the outer cone 2, so that the walls of the two conical members gradually converge or approach each other and leave an annular opening between the lower marginal edge of cone 3 and the adjacent wall of cone 4. The conical members are so proportioned and arranged that the cross sectional area of the space inclosed by the walls is larger than the cross sectional area of the exhaust pipe 1, and gradually increases toward the lower or discharge end of the chamber 4, so that the openin constitutin the discharge end of the cham er is severa times as great as the opening constituting the inlet of said chamber adjacent the exhaust pipe 1. The conical members 2 and 3 are secured together in rigid relation by means of relatively thin metal spacing strips 6 and 7 at the top and bottom of the conical members, and which are attached to the walls of said conical members by any suitable means.

Extending from the lower end of the outer Wall 2 is an annular deector plate 8, which is curved downwardly below and around the lower edge of the inner conical wall 3, and then upwardly toward the center of the inner cone, the radius of curvature of the deliector plate gradually increasin toward the center so as to provide a gradua change of direction or reversal of flow of the exhaust gases escaping from the chamber 4, to cause the said gases to move from all sides toward the vertical axis of the coni-cal member 3 and to collide, whereby any residual,

a chamber having sin inlet en outlet and inner and outer conical wells converging to- Ward the outlet to produce a. Yges assage of increasing cross sectional area. an of graduall decreasingi width, an inwardly curved de ector exten ing from the outer wall adjacent the outlet, and a concave septum lochamber within which the escaping gases 10 collide.

' In testimony whereof I ax my signature.

JAMES MILTON BROWN.

copie! of this pltent my be obtained for ive cents each, by addrelsing the ommnloner o! IPM/enti, Washington, D. C.

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