US1274943A - Muffler. - Google Patents

Description

`HfA.` SCHMIDT- v Mumia. APPLICATION FRED `PR. 23, 191?. RENEWED JUNE 20| 1918.

(g1/we wko@ im m@ UNITED STATES HERMA-.N A. SCHMIDT, 01T' DETROIT, MCHGPM'.

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Specification of Letters Patent.

Patented Aug. 6, 1.918.

Application led April 23. 1917, Serial No. 163,861. Renewed .Tune 20, 1918. SerialNo. 2li-1,0134.-

To all whom t may concern:

Be it known that l, HERMAN A, SCHMIDT, a citizen of the-United States of America, residing at Detroit, in the county oir l/Vayne and State of lllichigan, have invented certain new and useful Improvements in Muftiers, ot' which the following is a specification, reference being had therein to the `accompanying drawings.

rlhis invention relates to mufilers especially designed for the exhaust or manifold of an internal combustion engine, although the device may be used for silencing the exhaust of steam or gases from conduits.

',lhe primary obje-ct of my invention is to provide a muffler having a series of spaced 'mailling members which will retard and positively reduce to atmospheric pressure, gases passing therethrough, Without overheating of the device or clogging thereof duc to deposits from exhaust gases.

A further object; or' my invention is to provide a mailling device wherein the` parts are constructed with a view oil reducing the cost of manufacture and at the same time retain those features by which durability, simplicity oi' construction and ease of asembling are secured.

Reference Will now be had to the drawing, wherein`- Y Figure 1 is a longitudinal sectional view of the muffler, and

Figs. 2 to 5 inclusive are views in elevation ot detached baille members.

ln the drawing, 1 and 2 denote inner and outer cylindrical shells of the same length and material, the inner vshell 1 being disposed in concentric spaced relation to the Oute'r shell 2 to provide an annular lair space 3, also clearance for a cover l on'the inner shell 1, said cover being preferably made of asbestos, which together with the air space 3 will tend to deaden any sound Within the muiller and at the same time prevent overheating of the outershell.

Engaging the ends of the inner and outer shells 1 and 2 respectively, are caps 5 and 6 connected by a plurality of tie rods 7 having heads 8 at the cap 5 and detachable nuts 9 at the cap 6. The cap 6 has a concentric connection 10 'for an inlet pipe 11, and the cap 5 has an oil'set outlet connection or eX- haast 12, which is provided with a ilattened or restricted portion 13.

Arranged on the tie rods 7 and mainnated 15, 1G, 17, 18, 19, 2O and 21. Thebaille member 21 is in proximity to the inlet pipell and .serves functionally as a deilec.

tor, said member being conical shaped so .that gases entering the inner shell 1 will be deflected toward the Walls thereof orthe edges of said baille member, which are in spaced relation to the inner shell 1.

The baille members 20 and 15 are identical in construction and one of these members is shown in Fig. 2 in the 4form of a disk having parallel slots 22. The baille members 20 and 15 engage the Walls of the inner shell 1 and it is necessary for gases to pass through the slots 22. The baille member 20 may be positioned relative to the baille member 15 so that the slots 22 of the member 20 are at right angles to the slots of the baiile member 15.

The baille members 19 and 17 are identical in construction and one of these members is shown in Fig. t consisting Aof a plate substantially rectangular and having shell contacting edges 23 and other edges 24 coperating with the inner shell in providing openings adjacent said shell, through Which gasesY must pass.

The baille members 16 and 18 are identical in construction and have been shown in Figs. 3 and 5 respectively. These baille members are in the form oi"v disks having a series of parallel slots 25 and when placing said baille members in position, the baille member 18 has the slots thereof at right angles to the slots of the baille member 16.

'The course of gases through the muiller has been indicated by arrows and it Will be 'noted that the gases are sufficiently retarded so as to be reduced to atmospheric pressure before final exhaust, consequently all noise is eliminated or silenced` by the device.

l attach considerable importance to the manner of assembling the various baille members, as in some instances the number of members may be decreased While in other instances the number of members may vbe increased by using short or longer spacing sleeves on the tie rods. It is therefore possible to adapt the muiller to various kinds ofcxhausts, so that irrespective of the in 'tensity or pressure of the exhaust it will be possible to silence the same. Furthermore, the manner of assembling the various parts .permits of the mutiler being cleansed from time to time and the simple construction reduces the cost of manufacture to a minimum.

One embodiment of my invention has been illustrated, but it is to be understood that the structural elements are susceptible to such variations and modifications as fall within the scope of the appended claim.

A mulling device Comprising an outer cylindrical shell, an inner cylindrical shell in. spaced relation to said outer shell, caps on the ends of said shells, gas inlet and exhaust connections for said caps, tie rodsextending through said inner shell and oonnecting said cap, baflie members on said rods and in spaced relation, one of said battle members being vconical and pointed toward the gas inlet connections and having its edges spaced from said inner shell, two of said baffle members having a pair of slots with said members positioned with the slots of one member parallel with the slots of -the other member and the edges of both of said members engaging said inner shell, two more of said baffle members having each a plurality of slots with one of said members positioned with the slots thereof at right angles to the slots ot' the other member, and the edges of said members in engagement with said inner shell, and the remaining two ot' said baffle .members being imperforate and substantially rectangular with shell contacting edges, the arrangement ot' the battle `members being such that the slots of four ol said members cooperate with the edges ot the impert'orate members, the eoneal member and the inner shell in forming a tortuous passage for gas through the inner shell.

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

HERMAN A. SCHMIDT.

Witnesses:

LEWIS E. FLANDERS, ANNA M. Donn.

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