US2083959A

US2083959A - Power boat

Info

Publication number: US2083959A
Application number: US66114A
Authority: US
Inventors: Mcmullen John Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-02-27
Filing date: 1936-02-27
Publication date: 1937-06-15
Anticipated expiration: 1954-06-15

Description

June 15,1937. J. R. MCMULLEN 2,083,959

' POWER BOAT Filed Feb. 27, 1936 2 Sheets-Sheet l Inventor fi z. M fia/Aw? 1 By Wm. M l g A llomelw J. R. M MULLEN POWER BOAT June 15, 1937.

2 Sheets-Sheet 2 Filed Feb. 27, 1936 Patented June 15, 1937 UNETED Si l" 3 Claims.

My invention relates generally to self-propelled boats, and particularly to a power boat suitable for passenger and cargo service, and for high speed navigation, and an important object of the invention is to provide a simple and well balanced boat of this character having an inverted keel forming a Water tunnel in which propelling means works. s

Another important object of my invention is to provide a stable and easily manuevered power boat of the character indicated which is strong and rugged while being comparatively light in weight.

Another important object of my invention is to provide a power boat of the character indicated above in which maximum use is made of hull formation and power application to procure efficiency in expenditure of power for propelling the boat.

Other important objects of my invention will be apparent from a reading of the following description in connection with the drawings, wherein for purposes of illustration I have shown a preferred embodiment of my invention.

In the drawingsz- Figure 1 is a bottom plan View of the embodiment.

Figure 2 is a front end elevational view thereof.

Figure 3 is a longitudinal vertical sectional View taken through Figure 1.

Figure 4 is a rear end elevational view.

Referring in detail to the drawings, the numeral 5 generally designates the hull which in plan outline may follow the accepted contour of a relatively sharp nosed squared sterned boat, but has the bow undercut as indicated by the numeral 5 so as to form a spoon-bow running from the forward extremity of the hull to the point Opposite sides of the bottom of the hull are 40 laterally inwardly curved as indicated by the numerals 2 and 9 and at points laterally displaced from the longitudinal center of the hull, the forward ends of the sides 8 and 9 and the longi tudinal central part of the bow 6 providing chan- 45 nels iii and H which funnel the water into the tunnel i2 which runs rearwardly for the full length of the hull from the point i and opens through the stern it as indicated by the numeral i4.

50 The bow 5 has a centralized depending portion defined by the funnel formations iii and H which is generally triangular in form and has laid therealong and secured thereto the metal keel it which runs all the way to the stern of the boat 55 Where the keel [6 has a right angularly upwardly projecting portion i! which has bearing arms containing eyes i8 and iii in which the rudder post 26 is swingably mounted to support the rudder 2i in proper position at the stern of the hull.

A tiller 22 is attached to the upper end of the 5 rudder post.

Between the eye equipped arms 58 and it on vertical portion ll of the keel is the bearing structure which is generally designated 23 which journals the rear end of the propeller 10 shaft 2G- which has its front end journaied transverse partition 25 which rises from the point i and extends across the interior of the hull 5. The horizontal portion 26 of the keel is spaced below the top of the water tunnel i2 and lies 15 along longitudinal center of the hull.

The propeller shaft 2 5 has in front of the partition 25 and located in the space 2'5 which is doflned by the partition 25 and the prow of the boat, the sprocket wheel 28 which. is connected with the sprocket wheel 29 which is located on the shaft 30 which has its front end supported in a bearing on the top of the partition 25. The shaft 36 extends rearwardly through a supporting bearing 32 mounted on the floor 33 of 2 the hull and is operatively connected to the motor or engine 3d; whereby the propeller shaft 2 1 is driven at the required speed and with the required power. Any suitable motor or engine 3% may be utilized. In order to bring the motor 30 down as low as possible so as not to have an overbalancing effect on the hull when in the water, the engine is set in a depressed position in a pit 35 in the floor structure 33.

The propeller shaft 26 has by preference spiral 35 continuous blade structure 35 which runs the length of the Water tunnel and the length of the propeller shaft 24 between the partition 25 and the stern of the boat. The bearing structure 23 of the propeller shaft has a transverse brace arrangement 31 which is attached as indicated by the numerals 38 and 39 to opposite marginal portions of the stern 13, as shown in Figure 4, whereby to firmly brace the rear end of the propeller shaft and insure smooth running thereof as well as bracing the rear end of the keel It. It is obvious that the keel l6 not only armors the prow of the hull, but provides the protection for the propeller and the water tunnel, and at the same time acts as a supporting structure for not only the rear end of the propeller shaft, but for the rudder, and braces the stern of the hull.

The funnels Ill and II chute the water forcibly into the water tunnel l2 and pack the water in said tunnel, so that the propeller blade structure 36 gets a more effective purchase upon the water, and drives the same in a whirling column forcibly rearwardly through the opening I4 at the stern of the hull, so as to forcibly and evenly propel the hull through the water.

If desired a sprocket chain 40 may be trained over the

Wheels

28 and 29 so as to form a drive connection therebetween, instead or" a direct toothed meshed drive.

Although I have shown and described herein a preferred embodiment of my invention, it is to be definitely understood that I do not desire'to limit the application of the invention thereto, and any change or changes may be made in the materials, and in the structure and arrangement of the parts, within the spirit of the invention and the scope of the subjoined claims.

What is claimed is:-

l, A power boat comprising a hull including a bow having water directing funnels on its underside, said hull at its. underside having a longitudinal water tunnel into the front end of which said funnels lead, said tunnel being open at its bottom and extending uniformly from said funnels to the stern of the boat, longitudinal water propeller means confined entirely within and along said water tunnel, and means on said hull for driving said propeller means, and a metallic keel running along said bow and along said hull under and spaced from said water tunnel for protecting the propelling means therein, the opposite ends of the keel extending upwardly at the bow and the stern and secured to the deck of the boat.

2. A power boat comprising a hull including a bow having Water directing funnels on its underside, said hull at its. underside having a longitudinal water tunnel into the front end of which said funnels lead, said tunnel being open at its bottom and extending uniformly from said funnels to the stern of the boat, longitudinal water propeller means confined entirely within and along said water tunnel, and means on said hull for driving said propeller means, and a metallic keel running along said bow and along said hull under and spaced from said water tunnel for protecting the propelling means therein, said keel having at its rear end an upstanding portion into the stern of the hull and including rudder supporting means, the opposite ends of the keel extending upwardly at the bow and the stern and secured to the deck of the boat.

3. A power boat comprising a hull including a bow having water directing funnels on its underside, said hull at its underside having a longitudinal water tunnel into the front end of which said funnels lead, said tunnel being open at its bottom and extending uniformly from said funnels to the stern of the boat, longiiidinal water propeller means confined entirely within and along said water tunnel, and means on said hull for driving said propeller means, and a metallic keel running along said bow and along said hull under and spaced from said water tunnel for protecting the propelling means therein, said keel having at its rear end an upstanding portion into the stern of the hull and including rudder supporting means, said upstanding portion carrying bearing means for supporting the rear end of the propelling means, and horizontal braces extending outwardly from opposite sides of the bearing and secured to the stern of the hull at opposite sides of the tunnel, the opposite ends of the keel extending upwardly at the bow and the stern and secured to the deck of the boat.

JOHN ROBERT MCMUILEN.