US880604A - Exhaust mechanism for explosive-engines. - Google Patents

Description

PATENTED MAR. 3, 1908.

J. M. & E. E. TRUSGOTT. EXHAUST MECHANISM FOR BXPLOSIVE ENGINES.

APPLIGAT ION FILED MAR.15, 1906.

TIIIIIIIlIl/I UNITED STATES PATENT OFFICE.

JAMES M. TRUSCOTT AND EDWARD, E.

TRUSCOTT, OF ST. JOSEPH, MICHIGAN, ASSIGNORS TO TRUSCOTT BOAT MANUFACTURING COMPANY, OF ST. JOSEPH, MICHIGAN, A CORPORA- TION OF MICHIGAN.

EXHAUST MECHANISM FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed March 15. 1906. Serial No. 306.145.

To all whom it may concern:

Be it known that we, JAMEs M. TRUSCOTT and EDWARD E. Tnusoor'r, citizens of. the United States, residing at St. Joseph, in the county of Berrien and State of Michigan, have invented new and useful Improvements in Exhaust Mechanism for Explosive-Engines, of which the following is a specificatron.

Our present invention relates to certain new and useful improvements in exhaust mechanism for explosive engines, and more especially to exhaust mechanism of the submerged or underwater type, such as is associated with explosive engines mounted upon motor boats or launches.

It is the prime object of the invention to provide a novel construction of exhaust mechanism of the character referred to that will materially silence the exploded charges during the exhaust operation and at the same time prevent back-pressure in the engine cylinders.

With the above objects in view, the invention comprises, in the form herein shown, exhaust mechanism of the character stated in which the exhaust pipe from the engine cylinder communicates with, and discharges into, an expansion tank or chamber that may or may not be partially filled with water, said tank having a pipe or passage opening through the hull of the boat below the water line at any suitable point along the side or bottom thereof, and disposed in such manner that during the travel of the boat through the water a continuous suction or pull will be exerted through the pipe or passage and on the contents of the tank whereby to effect a complete and practically noiseless under-water exhaust of the exploded gases, such as will prevent backpressure in the engine.

In the accompanying drawing which is illustrative of one embodiment of our invention, Figure 1 is a side elevation, partly in section, of a motor boat, showing the application of our improved exhaust mechan- 1sm to an explosive engine of ordinary construction; Fig. 2 is a side elevation, partly in section, of the discharge pipe and casing. Fig. 3 is a section on the line 22 of Fig. 2 and Fig. 4 is a plan view looking toward the rear of the discharge pipe and casing.

In the special construction illustrated, and

which is one of the many arrangements that may be employed in carrying out the spirit of the invention, the reference numeral 1 designates the hull of an ordinary pleasure craft; 2 an explosive motor carried thereby, and 3 the exhaust pipe for the motor. This exhaust pipe 8 communicates with and discharges into an expansion tank or chamber 4, located in the boat 1, preferably, but not necessarily in such manner that the water line extends about centrally of the tank.

In the arrangement shown, the exhaust pipe 3 discharges into and communicates with one end of the tank 4, and leading from the opposite end of the tank is a discharge pipe or passage 5, theconstruction. illustrated having a return bend 6, the open end of which is in communication with a hollow casing 7 secured to the hull of the boat on the exterior thereof, said casing being relatively fiat and broad and having an imperforate cover-plate 8 and a wide-mouthed opening 9, disposed toward or facing the stern of the boat, and located below the water line. The expansion tank is preferably, but not necessarily normally partially filled with water as shown, so that when the exploded or exhausted charges from the engine are discharged therein they will be cushioned and become instantly cooled and expanded. By locating the tank 4 partially below the Waterline, water will enter therein immediately the boat is placed in the river or other body of water.

By reason of the construction and arrangement of the opening 9, in the nozzle or casing, and the return bend 6, both of which are disposed toward the stern of the boat, it will be apparent that as the boat is pro pelled through the water, the rush of water over the cover plate 8, and past the opening 9, will cause a continuous suction or pull to be exerted through the 5, and on the contents of the tank, such as will insure a complete and continuous discharge of the exhausted and expanded gases in the tank, the action of the parts described being in the nature of an aspirator.

By referring to the drawing it will be seen that the casing 7 is a relatively thin hollow body that lies practically flat against the side or bottom of the boat, the closed end gradually tapering to nothing at the point where it merges into the marginal attaching flange 10. By this construction it will be obvious that there are no abrupt projections such as would offer resistance to the free 1 passage of the boat through the water, and this is a feature of considerable importance in underwater structures of this kind. The form of exhaust mechanism shown also renders it possible to provide, in a simple and effective manner, for the discharge of the water from the cooling jacket of the engine. To accomplish this end we tap the cooling jacket 12, as shown, with a short pipe or nipple 13, the free end of which discharges directly into the exhaust pipe 3, so that the cooling water after having passed through the jacket, is discharged into the exhaust pipe, partially cooling the exhausted charges, and then flowing with the latter into the expansion tank 4, from whence they are sucked or pulled out through the return bend 6, into the water in an obvious manner.

In the showing herein made we have illustrated only one form of the invention, by way of example, recognizing that modifications of the arrangement will readily suggest themselves to those skilled in the art, and we do not therefore, wish to be understood as limiting ourselves to the precise construction shown, except as we shall be limited by the scope of the appended claims.

It will be apparent that exhaust mechanism of the character herein shown may be applied to explosive or expansive motors of all types, whether of the reciprocatory or rotary piston class, and we do not, therefore, wish to limit ourselves to the application of the invention to any particular kind of motor. Neither do we wish to be understood as limiting ourselves to the particular location of the expansion tank as herein shown, for it will be obvious that the tank or chamber may be otherwise located or positioned without departing from the true spirit of the invention, although advantages result from locating the tank partially below the water-line, in that immediately the boat is placed in the water the tank will become partially filled, and the water therein then acts as a cushion for the exploded charges and also serves to cool and expand such charges.

hat we claim and desire to secure by Letters Patent is 1. In combination with a boat having an explosive motor thereon, under water exhaust mechanism for the motor consisting of a nozzle comprising a hollow casinghaving a wall secured to the hull of a boat and an imperforate wall spaced therefrom and oining said first wall at three sides only to provide a chamber whose only outlet is directed to ward'the stern of the boat, and an expansion chamber having communication with the motor exhaust and with the said nozzle.

2. In combination with a boat having an explosive motor thereon, under water exhaust mechanism for the motor consisting of a nozzle comprising a hollow casing having a substantially flat wall attached to the hull of the boat below the water line and an imperforate wall arched over said flat wall, said imperforate wall being removed from the flat wall to provide an opening at one end only of the casing and joined thereto at its opposite end, and a pipe leading from the space between the said walls and communicating with the exhaust pipe of the motor.

3. In combination with a boat having an explosive motor mounted thereon, exhaust mechanism for the motor, comprising an expansion tank having communication with the exhaust pipe of the motor, a part of said tank being located below the water line, and an outlet pipe leading from the tank and extending through the bottom of the boat below the water line thereof, the discharge end of said outlet pipe being free and unol structed and directed toward the stern of the boat.

4. I11 combination with a boat having an explosive motor mounted thereon, exhaust mechanism for the motor, comprising an expansion tank having open communication at one end with the exhaust pipe of the motor, a part of said tank being located below the water line, and an outlet pipe leading from the opposite end of the tank and discharging outside of the boat below the water line thereof, the free end of said outlet pipe being directed toward the stern of the boat.

5. In combination with a boat having an explosive motor mounted thereon, exhaust mechanism for the motor, comprising an expansion chamber having communication with the motor exhaust, and an aspirating nozzle consisting of a hollow casing provided with means whereby it may be secured to the bottom of the boat below the water line and having a single outlet opening directed rearwardly, the outer wall of the nozzle being imperlorate, and a pipe connection between the nozzle and the expansion chamber. p

6. In combination with a.boat having an explosive motor thereon, an under water aspirator for the motor exhaust, comprising a nozzle consisting of a hollow casing secured to the side of the boat below the water line, said nozzle having an imperforate outer wall and a single outlet opening directed toward the stern of the boat, and a pi e having communication with the said nozz e and with the motor exhaust.

7. In combination witha boat having an explosive motor thereon, exhaust mechanism for the motor, comprising an expansion chamber having communication with the motor exhaust, a portion of said chamber being below the water line of the boat, a relatively broad and fiat hollow casing secured to the outside of the boat below the water line and having a rearwardly directed opening, and a rearwardlycurved pipe leading from the expansion chamber to said hollow casing.

8. An exhaust-nozzle of the character described comprising a hollow casing having a substantially flat wall adapted to be attached to a wall of a boat and an imperforate wall arched over said. flat wall, said imperforate wall being removed from the flat wall to provide an opening at one end of the casing and 'oined thereto at its opposite end, and a pipe leading from the flat wall and having com munication with the space between the two walls.

9. An exhaust nozzle of the character described comprising a substantially flat rear Wall and an imperforate front wall arched over one facev thereof and joined thereto at the sides and at one end only, the opposite end being removed from the rear wall to provide an opening at said end that communicates with the space formed between the two walls and a pipe leading from the outer face of the rear wall and communicating with said space.

10. An exhaust-nozzle of the character described comprising a substantially fiat rear wall and an imperforate front wall substantially parallel therewith and oined thereto at the sides and at one end only, the opposite end being separated from the rear wall to provide an opening at said end that communicates with the space between the two walls, and a curved pipe extending tangentially from the outer face of the rear wall and communicating with the said space.

1.1. An exhaust nozzle of the character described comprising a hollow casing having a wall adapted to be secured to the hull of a boat and a second wall spaced therefrom and joining said first wall at three sides only to provide a chamber open at one end, and an exhaust pipe having communication with said chamber.

In testimony whereof We have hereunto set our hands in presence of two subscribing Witnesses.

JAMES M. TRUSCOTT. EDWARD E. TRUSCOTT.

"Witnesses: a

H. E. KEMiToH, MILo SELTER.

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