US1344367A - Muffler for explosive-engines - Google Patents

Description

E. E. WICKERSHAM. MUFFLER FOR EXPLOSWE ENINES.

APPLICATION HLED JULY 16, 1918.

1,344, 367, Patented June 22, 1920.

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well as decrease UNITED STATES PATENT OFFICE.

ELMER E. WICKEBSHAM, OF STOCKTON, CALIFORNIA, ASSIGNOB TO THE HOLT MANU- FACTURING COMPANY, OF STOCKTON,

FORNIA.

CALIFORNIA, A CORPORATION OF CALI- MUFFLER FOB EXPLOSIVE-ENGINES.

Application filed To all whom it may concern:

Be it known that I, ELMER E. WIGKER- SHAM, a citizen of the United States, residing at Stockton, in the county of San Joaquinand State of California, have invented new and useful Improvement in Mufiiers for Explosive-Engines, of which the following is a specification.

This invention relates to an explosive engine, and particularly pertains to a muflier therefor.

In view of the fact that the explosions within the cylinders of an internal combustion engine produce loud and objectionable detonations, it is desirable to mufile the sound, at the same time allowing the exhaust ases to pass from the engine cylinders without obstruction.

It is the principal object of this inven tion to provide a simple mufliing device which may be readily disposed over the exhaust pipe of an internal combustion engine, and through which exhaust gases may flow without obstruction, at the same time mutiling the sound of the explosion as the gas violently rushes from the engine into the surrounding atmosphere.

The present invention contemplates the use of a circular passageway having a tangential inlet and an axial outlet and, further, formed with a pocket adapted to interrupt the gas and dissipate its force as the vibration of the sound waves therein.

Having reference drawings:

Figure 1 is a view in side elevation, illustrating the completely assembled mufller.

Fig. 2 is a view in end elevation, illustratt e device as shown in Fig. 1. i s. 3 and 4 are transverse v'ews disclosing t e tangential inlet and the radial outlet openings as well as the intervening passa eway.

eferrin ings, 10 in to the accompanying more particularly to the drawicates t e exhaust pipe of an ex plosive engine. This pipe is commonly cy lindrical in section and in the resent instance is adapted to be fitted wit a mufller 11. As a matter of convenience, both in as sembly and manufacture, the muffler is made having complementary parts 12 and 13. These parts are united along their contiguous edges by bolting lugs 14 and, when Specification of Letters Patent.

tial passageway by Patented June 22, 1920.

July 16, 1918. Serial No. 245,183.

combined, will be securely clamped around the outer end of the exhaust pipe.

The muflier halves are united to form a circular passageway 15 in communication with the open end of the exhaust pipe by means of a tangential passageway 16. This last named opening is arcuate and leads from the end of the pipe which is preferably disposed in longitudinal alinement with the central axis of the muffler. The central axis of the mufiler also coincides with the transverse axes of outlet openings 17 formed through the opposite side walls of the muffler case. These openings are preferably circular and are concentrically disposed in relation to the main passageway 15.

Formed alongside of the inlet passageway 16 is a sound deadening chamber 18. This chamber is separated from the tangenan arcuate wall 19 and is further separated from the main annular passageway 15 by an arcuate baffle wall 20. This wall extends from the terminating end of the wall 19 to a point adjacent to the side wall of the muflier, thus forming an inlet port 21. The wall 20 is substantially concentric with the axes of the openingslT. The port 21, leading into the chamber 18, is tangentially disposed in relation to the path of trave of the fluid passing through the muflier and thus tends to dissipate the force of the gases rushing therethrough to deaden the sound produced by the gas as it is emitted from the openings 17 in the case.

In operation, the exhaust gases from the engine will pass into the tangential passageway 16 with great violence and will thereafter be directed in a circulatory path of travel around the annular confining wall of the passageway 16. This will produce a gyrating motion of the gas as it circumscribes the axes of the openings 17 A centrifugal action will be thus im arted to the gas to retard it in its flow. l his gyratin motion will be decreased, due to the fact t at some of the gas will pass into the sound deadening chamber 18 and there be muflled. A back ressure of this gas in this chamber will .urther retard the movement of the main body of gas and decrease its sound and will finally change its path of travel from a circulatory one to an axial one, thereafter flowing outwardly through the opposite openings 17 in the case. Due to the peculiar formation of the case and the manner in which the gas is afforded a long path of travel the violence of the explosion will be dissipated and the gas will pass out into the atmosphere without produrin r an objectionable detonation. Incidental y the chamber 13 will gather the particles of carbon and extinguish and entrap the flame which would otherwise pass out through the unit'- tier.

It will thus be seen that the structure here disclosed while decidedly simple in its formation will effectually reduce the rate of travel of exhaust gases from explosive engines and affect these gases in a manner to dissipate the detonations incident to the explosions within the engine cylinders and the exhaust therefrom.

Having thus described my imention, what I claim and desire to secure by Letters latout is 1. A mnlller for explosive engines com prising a hollow casing adapted to he disposed in communication with the end of an exhaust pipe, an annular passageway within the casing formed with a peripheral inlet opening, a sound deadening chamber in closed within the casing having its opening tangentially disposed to th path of travel of gas, and axial outlet port owned in the opposite sides of the casing all.

2. A mufller for explosive engines having a circular passageway formed with an inlet opening at the periphery and oppositely disposed axial outlet ports, and a sound-deadening chamber disposed in tangential relation to the path of travel of gas flowing throu h the passageway and outwardly through t e axial )orts.

3. l mufller for explosive engines comprising a casing having a cylindrical chamber, an inlet at the periphery of said easing radially disposed, oppositely disposed outlet openings at the center axially thereof and a sound deadening chamber communicating with said cylindrical chamber and disposed in the path of travel of the gases, said sound deadening chamber heing arranged at a point greater than 180" from the inlet.

4. A mufller for explosive engines comprising a casing having a cylindrical chamher, an inlet at the periphery of said casing radially disposed, oppositely disposed outlet openings at the center axially thereof, a sound deadening chamber connnnnicating with said cylindrical chamber and disposed in the path of travel of the gases, said sound deadening chamber being arranged at a point greater than 181) from the inlet, and means in the form of a ballle plate at the entrance of said sound deadening chamber for assisting in the separation of the solids from the gas and isolating said solids after the same have been separated.

lnulller for explosive engines comprising a casing having a cylindrical chain her, an inlet at the periphery of said casing radially disposed, oppositely disposed out let openings at the center axially thereof, a sound deadening chamber conunnnicating with said cylindrical chamber and disposed in the path of travel of the gases, said sound d adening chamber being arranged at a point greater than 1 from the inlet, means in the form of a ballle plate at the entrance of said sound deadening chamber for assisting in the separation of the solids from the gas and isolating said solids after the same have been separated, and means no cessible from the exterior of the muflier for exposing the contents of said sound deadening chamber to permit cleaning of the latter.

In testimony whereof I have hereuntoset my hand in the presence of two subscribing witnesses.

ELMER- E. WIGKERSHAM.

\Vitnesses F. W. Tami, DAVID B. LYMANN.

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