US890014A - Muffler or exhaust device for marine motors. - Google Patents

Description

No. 890,014. PATENTED JUNE 9, 1908.

A. BARBOUR.

MUFFLER OR EXHAUST DEVICE FOR MARINE MOTORS.

APPLICATION FILED JULY 25. 1906.

'lil, :il f l v I 5 N I JEEP \E v x I P w w 5 O L UNITED STATES PATENT OFFICE.

ALVAH BARBOUB, OF SWANS ISLAND, MAINE.

MUFFLER OR EXHAUST DEVICE FOR MARINE MOTORS.

To all whom it may concern:

Be it known that I, ALVAH BARBOUR, a citizen of the United States, residing at Swans Island, in the county of Hancock and State of Maine, have invented certain new V and useful Improvements in Mufflers or Exhaust Devices for Marine Motors and I do 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.

This invention relates, generally, to exhaust mufiiers and particularly to mufflers for the exhaust of marine engines of the explosive type used for the propulsion of launches and other vessels and it has for its object to provide a simple, durable, and comparatively inexpensive mufller adapted to be submerged and to exhaust the products of combustion and explosion under water, and thereby obviate the disagreeable noise and odor accompanying the exhaust in the atmosphere, and it consists in the parts and combinations of parts hereinafter described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side elevation, partly broken away, of a boat showing my invention in position thereon. Fig. 2 is an enlarged detail perspective view of the exhaust nozzle.

Similar letters refer to similar parts in both the views.

Referring to the drawings A represents a boat or vessel and B a motor or engine, preferably, of an internal combustion or explosive type, suitably arranged therein.

0 represents the flooring of the boat or vessel and D the keel thereof.

E is a rudder post and F the rudder both of which, as well as the propeller G mounted on the shaft H, may be of any preferred style or type and arranged in any preferred or suitable manner.

':l[he water line is indicated in broken lines at The exhaust pipe J is connected to the ex haust port in any preferred or suitable manner and leads thence, in this particular instance, on an inclined line, as at a, to a point below the flooring C and is then carried on a horizontal line, as at 1), toward the stern, and is then turned vertically upward, as at c, to a point above the water line I. The exhaust pipe is then turned at right angles toward the stern, as at d, and then vertically d own- Specification of Letters Patent.

Application filed July 26, 1906.

Patented June 9, 1908.

Serial No. 327,902.

ward, as at e, and is connected to the exhaust nozzle L.

At a point in the exhaust pipe J above the water line and preferably in section 0, a discharge pipe M is placed with a three-way cock N, so that the exhaust gases may be directed towards the exhaust muffler, or directly to the atmosphere, at will.

The arrangement and position of the exhaust pipe above described is practical and gives good results in o eration, but it may be arranged differently if desired or found more convenient so to do the only essential being that at some point within the hull before it turns to go outboard it stands above the wa ter line of the boat.

The exhaust nozzle L is connected in any desired or suitable manner to the end of the exhaust pipe and as shown it is screwed thereinto and then secured to the boat through the disk P, so as to insure a water tight joint, but it may be fastened to the boat in any other suitable manner.

The body portion f of the nozzle L is conical in shape and its smaller end is bent vertically and tapers to a diameter corresponding, approximately, to the diameter of the exhaust pipe J.

The nozzle P may be attached to the bottom of the boat or on one side thereof, or extend out through the run or stern of the boat the only essential being that it shall be firmly secured to the boat at the forward end and that the remainder of the conical nozzle shall stand clear of the boat so as not to impart to the hull the blow of vibration which is so noticeable where the discharge end of the nozzle is in contact with the hull.

I prefer that it be arranged under the run so that it shall be just under water or submerged when the boat is at anchor and unoccupied, and that the rearward end be entirely separate from the hull.

In operation the passage of the boat through the water creates a suction at the mouth of the nozzle and exhausts the water causing a partial vacuum in the exhaust pipe which draws the gases and products of combustion and discharges the same under the water. When the boat or vessel is anchored or when it is to wing a load sufficient to retard the speed of the same, the valve N is opened to permit of the exhaust to the atmosphere.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: e H

1. A nozzle for the exhaust pipe of motor boats, having one end adapted to connect with said exhaust pipe and the other end terminating with a conical, outwardly flaring and rearwardly discharging mouth piece sub merged below the water-line and with its axis approximately parallel to the same.

2. An exhaust mufi'ler for motor boats, com rising an exhaust pipe and. a conical nozz e said nozzle being connected at its forward, smaller end to said exhaust pipe, and said nozzle standing clear of the hull and being submerged below the water-line and approximately parallel to it.

3. An exhaust muflier for motor boats, comprising a pipe connected at one end to the exhaust orilice of the motor and at the other end terminating outside the hull near the stern and connected to the small, forward end of a submerged conical, outwardly and rearwardly discharging nozzle in contact at one end only with the hull, and whose axis is approximately parallel to the water-line.

i. A combination of an exhaust pipe connecting with the exhaust orifice of a marine motor, of a relief Valve at a point in said pipe above the water-line, for the purpose of discharging all or a part of the gases to the atmosphere, and a submerged, rearwardly-discharging conical nozzle connected. to the ox 30 tremity of the said exhaust pipe and standing clear of the hull, said exhaust nozzle being submerged below the water-line with its axis approximately parallel to it.

in testimony whereof, I alIix my signature, in presence of two witnesses.

ALVAH BARB OUR. \Vitnesses C. M. WALKER, E. M. MAnsrI.

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