US900576A - Under-water exhaust for launches. - Google Patents

Description

H. .0. NELSON & Wu H. MULLINS. v UNDER WATER EXHAUST FOR LAUNCHES.

APPLICATION IILEIJ JAN. 15, 1906.

Patented Oct. 6, 1908.

INVENTOFIS.

de ukzzb, 2m; may

unrrnn stares Parana enn on.

' THENfRY NELSON AND wiL iAM H. MULLINS, or SALEM, OHIO.

UNDER-WATER n xnaus'rton Lamioms.

Tooll whoin'tt moi concern: Be it known that W6,'HENRY C. NELSON and WILLIAM MULLINS, residents of 1 Salem, in the county "of Columbiana and State f-Ohi'0,= have ;invented 'a new and useful Improvement in Under Water Exhausts for"- Launches and we do "hereby 'de-" clare the following to be a fullyclear, and

- exact description thereof.

Our invention relates to under-water exhausts for launches'or motor boats.

The object "of 'our invention" is to" provide means for conveying the waste {gases from i theexhau'st of the "'e'ngine'to a point at the rearof the-boat and below the waterline so'that by" the time the'gases have'iarrive'd at the point of discharge into thewater they emerge therefrom with practically no noise or disturbance so that the objectionable feature ofi'notor boats propelled by gas engines,"duefto the noise of theflexhaust' is practically -ove'r'c0me; v

A furtherobje'ct of our inventionis to so construct and arrange "this means for discharging" the gases at the stern of the boat and beneath the surface ofithe water that it is not necessary to change the forinof the construction of the ordinary boat or launch or cut into the body of the' same so as toweaken pr .mar theqappearance of the same: 1. f P

In carrying out our invention therefore we take advantage of the construction now commonly employed of A having the propeller shaft running up through the body of the boat so as to be directly geared to the englne, said shaft passing through suitable stuffing boxes and through a shaft-casing,

which shaft-casing we employ as a conduit for the gases discharged from the gas cham ber of the engine and We connect said casing with the gas chamber at one end with a suitable discharge pipe at its opposite end, so that in this way we dispense with such extra connections as might otherwise be necessary for conveying the discharged gases from the cylinder of the engine to a point at the stern of the boat.

To enable others skilled in the art to make and use our invention we "will describe the same more fully, referring to the accompanying drawing in which Figure 1 is a vertical section of the rear end of a suitable boat or launch showing our invention applied thereto; and Figs. 2 and 3 are enlarged views.

1 Specification of Letters Patent.

of "the figures.

In the drawing the numeral 2 designates the rearend of a suitable boat or launch to be propelled by the gas engine 30f any suitable construction. It is not deemed necessary toillustrate and describethe gas engine in detail, as any suitable form of gasjengine may of course be employed. WVithin'the gas engine 3 is a suitable piston aand the carrying off the exploded gases. The-cylinde'r'or body of the engine is provided with the ordinary water jacket? with the dischargeport 7. The propeller shaft 8 is connected up directly with the engine shaft i PatentedOct. 6, 190a. Application filed. Jannary 15, 1906. Serial No. 296,179. 1

' Like numerals indicate like parts in each' gas chamber 5' with the exhaust port 6 for and said propeller shaft extends in an"in-;

cli'ned direction through the propeller shaft casin 9 which is provided at each end with suita 1e stuffing boxes 10 and'l'l. o The propeller shaftextends' a suitable distance beyond the lower stufiing box 11, being supported by the frame12 and said propeller ordinary propeller 13. The'stufling box 10: forms part of a casting 14 which has the inclined extension15 which is connected to the engine cylinder. This extension 15 has: the central passage 16 which connects with shaft carries 'at its extreme outer end the the'exhaust port 6 of the engine and; in addi tion has the outer annular passage or well 17" which connects with the port 7 of the water jacket 7 of the engine. The. lower end of the passage 16 of the extension 15 and the well 17 communicate with the passage 18 in the propeller shaft casing 9. At the lower end of the casing 9 is the keel-casting 19 .in

which the stufling box 11 is formed and said keel-casting in addition has the by-passage 20 which connects the passage 18 with the exhaust pipe 21. This exhaust pipe is supported close to the bottom of the boat and extends out to a point adjacent to the stern, said pipe being below the water line. The outer end of the exhaust pipe 21 is open and forms the exhaust discharge 22. A suitable rudder 23 is supported at the stern in the usual manner.

When the engine is running to drive the propeller shaft and impartmotion to the boat the burned gases will pass from the chamber 5 through the port 6 into the passage 16, while at the same time the water from the water jacket 7 will pass through the Well 17 and will join the waste gases at. the point where the passage 16 and well 17 unite with the passage 18 in the propeller shaft casing. The water and gas w1ll be driven through the passage 18 and through the keel casting 19 into the exhaust pipe 21 to be discharged from the exhaust discharge 22. By the time the gases have reached the exhaust discharge they will have had an opportunity to expand so that they will not e ejected with a loud explosion, while at the same time the exhaust being below the water line the water will have a tendency to muflie the exhaust and further reduce the noise which has heretofore been so objectionable in motor boats of this character. The dischar e of the waste gases is made with practicalfy no sound and the boat moves along in the water evenly andsmoothly.

From the fact that we take advantage of the propeller shaft casing to convey the waste gases to the exhaust pipe -in the rear makes it possible for us to appl our improved apparatus to the boat without the necessity of using extra pi e or of making additional openings in the ody of the boat to receive the pipe for conveying the gases to the exhaust pipe. This construction of ours is therefore applicable to any boat which is already provided with the ropeller shaft casing, as it requires very little change to add the other parts necessary to make the structure complete.

It will be found in operation that as the boat moves through the water the propeller of the boat will act to cause a suction at the outer end of the exhaust pipe which will have a further tendency to quicken and aid the discharge of the gas and water contained within the exhaust pipe. This will further prevent the backin of the water-into the exhaust pipe and t us prevent the proper discharge of the gases.

What we claim is:

1. In a motor-boat, the combination of a gas-engine, a propeller shaft casing, and means for connecting up said casing w1th the exhaust port of sald engine and with an under-water exhaust.

2. In a motor-boat, the combination of a gas-engine, a propeller shaft casin a conduit connected to the exhaust of sai engine, and to said casing, and an exhaust-pipe connected to said casing and extending below the water-line.

3. In a motor-boat, the combination of a gas-engine, a propeller shaft casing, a conduit connected to said as-engine and to said casing, said conduit iaving two assages therein, one connecting with the ex must of said engine and the other with the wateracket,'both leading into said casing, and an exhaustipe leading from said casing to a point be ow the water-line.

4. In a motor-boat, the combination of a gas-engine, a propeller shaft casing, a conduit connected to said casing and to the exhaust of said engine, and an exhaust-pipe connected to said casing and extending out {o the rear end of said boat below the waterme. i

5. In a motor-boat,'the combination of a as-engine, a propeller shaft casing, a conuit connected to said casing and to the exhaust of said engine, a connection at the other end of said casin forming a stufiing- -box and having an out et, and an exhaustipe connected tosaid outlet extending beow the water-line.

In testimony whereof we, the said HENRY G. Manor: and WILLIAM H. MULLINs, have hereunto set our hands.

HENRY o. NELsoN. WILLIAM H. MULLINS.

Witnesses:

F. J. MULLINB, J. H. BLACKBURN.

Images