US733330A - Muffler. - Google Patents

Description

No. 733,330. BATENTED JULY 7 1903.

A. G. NEW.

MUFFLER.

APPLICATION rum mm. 30, 1899.

no MODEL.

In Q

mvewhoz: q vflmwoeo nz Noams PETERS o0. rrm'o Lrmq, WASHINGTON. o c

UNITED STATES I Patented July 7, 1903. PATENT ()FFICE.

ANTHONY GEORGE NEW, OF \VOKING, ENGLAND.

MUFFLER.

SPECIFICATION forming part of Letters Patent No. 733,330, dated July 7, 1903.

Application filed December 30,1899. Serial No. 742,117. (No model.)

T0 at whom it may concern.-

Be it known that I, ANTHONY GEORGE NEW, a subject of the Queen of Great Britain, residing at The Voltage, lVoking, in the county of Surrey, England, have invented certain new and useful Improvements in Mufflers; 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.

Myinvention relatesto certain new and useful improvements in gas-engines, and especially to that part of a gas-engine known as the muffler, which has for its object to prevent or reduce any noise from being caused by the exhaust-gases issuing from oil or gas engines and the like to the atmosphere, and is particularly applicable for use on motordriven vehicles propelled by such engines. Hitherto the exhaust-gases have usually been lead through a suitable pipe from the exhaust-valve to a box or muffler and there allowed to expand while passing through free or baflled passages in it and have then been free to escape into the atmosphere. In order to render the gases noiseless, in most cases large orcomplicated exhaust-boxes have been necessary, as otherwise the velocity at which the gases issue from the box is sufficiently high to create noise.

The present invention consists in a valve or its equivalent which is capable of completely closing the passage through which the exhaust-gases issue from the exhaust-box to the atmosphere and which is so arranged that it closes that passage during the period at which the exhaust-gases would otherwise issue noisily and opens it when their velocity has more or less subsided during each cycle of operations of the engine.

By the use of this device a smaller and lesscomplicated exhaust-box may be employed and a more effective silencing obtained.

In certain cases a second box may be advantageously employed to receive the gases which issue from the valve at the exit from the first box, this second box being similarly provided with a controlling-valve in its exitpassage. Any'number of boxes may be added in this manner.

In cases where more than one engine-cylinder is working and when the explosions of each are non-coincident separate boxes with valves may preferably be used; but if only box or series of boxes is used for a two-cylinder engine of this kind then the valve or valves would be arranged to open and close twice during each cycle of the engine.

I prefer to actuate the valve in such a manner that it closes suddenly and opens gradually; but Imay vary the rapidity, as also the relative moments, of either of its actions to suit individual requirements.

Referring to the accompanying drawing, forming part of this specification, the figure shown represents a central longitudinal sectional view of a muffler embodying my invention. 1

In the drawing, B is a chamber, into which the exhaust-gases are led from the engine through the pipe A. The only means of escape from the chamber B is through the passage or pipe I), which is controlled by a valve or valves, as shown. A pair'of valves H H are fixed upon a spindle F, which is carried in suitable bearings or guides F and is provided at the one end with a funnel-shaped mouth G, located near the inlet-pipe A, but removed therefrom, and at the other end with a spiral spring F which tends to keep the sliding spindle F in the position shown. The passage D is providedwith openings 0' G into the chamber B, and these openings are so shaped and arranged that the valves H H can completely close them if the spindle F be moved longitudinallyin its hearings or guides (from right to left) against the action of the spiral spring F The manner in which this automatic device works is as follows: When during the The velocity at which the gases escape will be less than that at which they enter the chamber B, owing to their temporary detention.

In certain cases I prefer to construct the valve I-I smaller than the valve H, because the pressure of the gases in the chamber B then opposes the action of the spring F until that pressure has subsided to the desired extent. By this means the valves H H remain closed for a longer period than they otherwise would.

It will be understood that by varying the relative sizes of the valves H H and the strength of the spiral spring F, I am able to control the period during which the exhaustgases are confined in the chamber 13.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a device of the character described, a chamber having an inlet-opening, an outlet-pipe projecting within the chamber and provided with valve-seats in oppositely-disposed openings, guides in the chamber, a rod extending through said openings and slidably mounted in the guides, a pair of valves of different sizes mounted on the rod and adapt ed to close the openings in the outlet-pipe, a funnel-shaped mouth-plate also mounted on the rod and located near the inlet-opening, and means for giving the rod a pressure in a direction to normally open the valves, substantially as described.

2. In a device of the character described, a chamber having inlet and outlet openings, a movable baffle-plate arranged in front of the inlet-opening and normally standing at a slight distance therefrom, a spring-pressed Valve located in front of the outlet-opening and normally standing away therefrom, and means connecting the baflie-plate with the valve whereby a rearward movement of the baffle-plate closes the valve.

3. In a device of the character described, a chamber having inlet and outlet openings, a spring-pressed rod slidably mounted therein, a funnel-shaped baffle-plate secured to the rod with its flaring part located in front of the inlet-opening and normally standing at a short distance therefrom, and a valve on the rod to close the outlet-opening when the baffle-plate is moved backward.

4. In a device of the character described, a chamber having an inlet-opening, an outlet-pipe projecting within the chamber and provided with valve-seats in oppositely-disposed openings, guides in the chamber, a rod extending through said openings and slidably mounted in the guides, a pair of valves mounted on the rod and adapted to close the openings in the outletpipe, a funnelshaped mouth-plate also mounted on the rod and located near the inlet-opening, and means for giving the spindle a pressure in a direction to normally open the valves, substantially as described.

5. In a device of the character described,

a chamber having an inlet-opening, an outlet-pipe projecting within the chambr, a rod slid ably mounted within the chamber, a valve carried by the rod and adapted to close an outlet-opening in the outlet-pipe, and a funnel-shaped mouth-plate mounted on the end of the rod and located near the inletopening, substantially as described.

6. In a device of the character described, a chamber having an inlet-opening, an outlet-pipe projecting within the chamber with itsinner end closed and an outlet-opening in its side, a spring-pressed rod slidably mounted within the chamber, a valve on the rod to close the outlet-opening, and a baflie-plate on the rod near the inlet-opening.

7. In a device of the character described, a chamber having an inlet-opening, an outlet-pipe projecting within the chamber and provided with oppositely disposed valveseats, a rod slidably mounted within the chamber, a pair of valves of difierent sizes mounted on the rod and adapted to close the valve-seats of the outlet-pipe, and a baffleplate carried by the rod near the inlet-opening, substantially as described.

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

ANTHONY GEORGE NEW. \Vitnesses:

EDMUND S. SNEWIN, WM. 0. BROWN.

Images