US556427A

US556427A - Carl loper

Info

Publication number: US556427A
Authority: US
Publication date: 1896-03-17
Anticipated expiration: 1913-03-17

Description

(No Model.) 0. LOPER'.

EXHAUST MUFFLER.

No. 556,427. Patented Mar. 17, 1896.

Wil eases: Jn Veil/0P;

UNITED STATES PATENT OFFICE.

CARL Lorna, or monrnnnnne, GERMANY.

EXHAUST-M UFFLER.

SPECIFICATION forming part of Letters Patent No. 556,427, dated March 1'7, 1896.

Application filed December 23, 1895. $eria1llo. 573,073. (No model.)

To all whom it may concern-.-

Be it known that I, CARL LoPER, a subject of the German Emperor, residing at Lichtenberg, near Berlin, in the German Empire, have invented certain new and useful Improvements in ExhaustdVIufflers; and I do hereby declare the following to be afull, 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 an improvement in dampers of sound for steam and gas motors.

The apparatus 'represented in the accompanying drawing is fit for obviating totally or almost totally the noise that is caused by the exhaust-steam in high-pressure engines or by the exhaust-gas in gas and petroleum motors.

The drawing represents a vertical section through the middle of the apparatus.

1 is the exhaust-pipe which connects the engine with the sound-damper.

2 is the usual pot for damping the sound in which the pipe 1 terminates.

3 is a pipe connection. The end of the pipe 3, between 3 and 4 situated in the pipe 4, is closed. The pipe 3 is provided at its lower side with one or more perforations 11 that form an open connection between the pipes 3 and 4. In the upper end of the pipe 4 and within the latter there is fixed a cone 5, in the interior of which there is a pipe 6. The upper end of this pipe is either completely closed, as shown in the drawing, or is provided with but small openings. The cone 5, the upper end of which may form a cylinder 5, is open at both ends. Between the outer surface of the cylinder 5 and the inner surface of the pipe 4, as well as between the outer surface of the pipe 6 and the inner under edge of the cone 5, in each case, an exceedingly small annular slit is left free.

At its upper end the pipe 4 is closed hermetically by a cover 9 or any other suitable arrangement. The piece 9 supports that part of the whole discharge-pipe that leads directly into. the atmosphere. In the drawing this exhaust-pipe is signified by 10.

The apparatus acts in the following manner: The gases are pushed through pipe 1 into the pot 2 and are here submitted to an increase of volume, considerable in comparison with the space occupied in the working cylinder. Therefore a decrease of tension occurs. The gases pass with this lessened tension through the pipe 3 and the opening 11 into the pipe 4, and as also this pipe is relatively large compared with the pipe 1 receive a further decrease of tension. As the drawing shows, the gases are at first pushed downward in the pipe 4 and, after having completely changed the direction of their motion and having at the same time lost a part of their momentum, stream upward to the cone 5. Then the gases are compelled to pass through the small annular slits 7 and 8 in order to pass into the utmost end of the dis charge-pipe or into the atmosphere respectively.

The great friction of the gases in the annular slits 7 and 8 and the fact that the gases are compelled to change the direction of their motion twice before they can pass out through the pipe 10 cause a considerable decrease of velocity of the gas, so that they stream out into the atmosphere without any perceptible shock and nearly silently.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what is claimed is- In sound-dampers for the exhaustpipes of steam-engines, gas-engines and the like, the combination of a pot 2 connected with the said exhaust-pipe 1 and a pipe 4, likewise freely connected by a pipe 3 to the said pot with a conic box 5 placed in the pipe 4, said box forming between the outer surface of its upper end shaped by preference cylindrically and the inner surface of the pipe 4 a small annular slit 7 and forming between its inner under edge and a pipe 6 fixed in the said box and not allowing a free passage to the exhaust-gases a second annular slit 8, substantially as and for the purpose set forth.

I11 testimony whereof I have affixed my signature in presence of two witnesses,

CARL LOPER. lVitnesses:

JOHN B. JACKSON, MAX WAGNER.