US1597175A - Propeller - Google Patents
Propeller Download PDFInfo
- Publication number
- US1597175A US1597175A US16147A US1614725A US1597175A US 1597175 A US1597175 A US 1597175A US 16147 A US16147 A US 16147A US 1614725 A US1614725 A US 1614725A US 1597175 A US1597175 A US 1597175A
- Authority
- US
- United States
- Prior art keywords
- propeller
- blade
- hub
- tip
- blades
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/16—Propellers having a shrouding ring attached to blades
Definitions
- My invention relates to propellers, particularly such as are adapted to operate in the water, although the improved construction may be used for propellers working in the air, and may also be employed for the generation of power from a stream or from air currents.
- the object of the invention is to improve the efliciency by reducing losses, particularly those due to the radial outward movement of the fluid under the influence of centrifugal force.
- Fig. 1 is a rear elevation of a ships propeller constructed according to my improved design
- Fig. 2 is a side elevation thereof
- Fig. 1 is a rear elevation of a ships propeller constructed according to my improved design
- Fig. 2 is a side elevation thereof
- Fig. 1 is a rear elevation of a ships propeller constructed according to my improved design
- Fig. 2 is a side elevation thereof
- Fig. 1 is a rear elevation of a ships propeller constructed according to my improved design
- Fig. 2 is a side elevation thereof
- FIG. 3 is a partial section on the line 3-3 of Fig. 1.
- the axis about which the propeller rotates is indicated at 10, and in the particular construction shown, the propeller has three blades, all rotating in the same plane or path, but it will be understood that I do not restrict myself to this particular arrangement or number of blades.
- Each of the blades is of a twisted or screw shape to obtain a propelling action of the Well-known character.
- the body 11 of the blade is narrowest at the hub 12 to which the blades are secured, or with which they are integral.
- the hub has a hole 13 to receive the propeller shaft (not shown) and agroove 14 for the reception of a key (not shown) to connect the shaft rigidly with said hub.
- the blades are widest at their outer edges or tips, the side edges 15, 16 of the same blade therefor diverging outwardly to the tip.
- the leading edge 15 that is, the edge which cuts the water When the ship is being propelled ahead
- the leading edge 15 is convex from hub to tip
- the following 4- edge 16 is convex only at its outer portion and concave at its inner portion.
- each blade is bent toward the rear as indicated at 17, to form a barrier preventing the outward movement and cscape of the water or other fluid.
- the bend 17 should have its inner surface (the one directed toward the hub) extended at least to a point (indicated at 18 in Fig. 3) where such surface is perpendicular to a plane of rotation, or in other words, perpendicular to a plane which is Serial No. 16,147.
- the bend is extended inwardly beyond this point 18, as shown, so as to form a flange or lip 19 directed in wardly and defining, in conjunction with the body llof the blade, a pocket 20 from which the water or other fluid can escape only at the open ends, as will be evident from Figs. 1 and 2.
- Lines drawn on the bend 17 and on the lip or flange 19 lengthwise of the pocket 20 are preferably straight, as will appear from the straight transverse lines bounding the blade tips in Fig. 1, said transverse lines being approximately perpendicular to the radial center lines of the re spective blades.
- the boat With the new propeller, the boat will hold her course readily even at low speeds, and in the docking or warping of large steamers, the tugs usually employed will either be dispensed with entirely, or at least a smaller number of tugs will suflice.
- a structure adapted for use as a propeller comprising a central body or hub and a plurality of blades extending outwardly therefrom, each of said blades having a convex leading edge and a following edge convex at its outer portion and concave at its inner portion, said blade being widest at its tip, and contracted toward the hub, and being provided,at such tip, with a bend extending on the side which forms the active face of the blade, to form a barrier to the radial outward movement of the fluid, the outer edge of said tip being substantially straight, and the bend of the tip being formed with a flange extending inwardly toward said central body or hub and forming with said active surface of the blade, a transverse pocket or channel substantially straight in the direction of its length.
- a structure adapted for use as a pro peller comprising a central body or hub and a plurality of blades extending outwardly therefrom, each of said blades increasing in width outwardly and being provided, at its tip, with a bend extending on the side which forms the active face of the blade, to form a barrier to the radial outward movement of the fluid, the outer edge of said tip being substantially straight, and the bend of the tip being formed with a flange extending inwardly toward said central body or hub and forming with said active surface of the blade, a transverse pocket or channel substantially straight in the direction of its length.
- a structure adapted for use as a propeller comprising a central body or hub and a plurality of blades extending outwardly therefrom, each of said blades increasing in Width outwardly and being provided, at its tip, with a bend extending on the side which forms the active face of the blade, to form a barrier to the radial outward movement of the fluid, the said bend being formed with a flange extending inwardly toward said (entral body or hub and forming with said active surface of the blade, a pocket or channel ranging transversely of said blade.
Description
E. BOENING PROPELLER Filed March 17. 1925 lNVENTOR 21%: ZOE/WW6 v BY W.WK' 7 05 ATTORNEYS Patented Aug. 24, 1926.
UNITED STATES ERNEST BOENING, OF YONKERS, NEW YORK.
PROPELLER.
Application filed March. 17, 1925.
My invention relates to propellers, particularly such as are adapted to operate in the water, although the improved construction may be used for propellers working in the air, and may also be employed for the generation of power from a stream or from air currents. The object of the invention is to improve the efliciency by reducing losses, particularly those due to the radial outward movement of the fluid under the influence of centrifugal force.
\Vithout desiring to restrict myself to the details illustrated, I will now, describe a preferred and satisfactory embodiment of my invention with reference to the acconipanying drawings, in which Fig. 1 is a rear elevation of a ships propeller constructed according to my improved design; Fig. 2 is a side elevation thereof; and Fig.
3 is a partial section on the line 3-3 of Fig. 1.
The axis about which the propeller rotates is indicated at 10, and in the particular construction shown, the propeller has three blades, all rotating in the same plane or path, but it will be understood that I do not restrict myself to this particular arrangement or number of blades.
Each of the blades is of a twisted or screw shape to obtain a propelling action of the Well-known character. The body 11 of the blade is narrowest at the hub 12 to which the blades are secured, or with which they are integral. The hub has a hole 13 to receive the propeller shaft (not shown) and agroove 14 for the reception of a key (not shown) to connect the shaft rigidly with said hub. The blades are widest at their outer edges or tips, the side edges 15, 16 of the same blade therefor diverging outwardly to the tip. Preferably the leading edge 15 (that is, the edge which cuts the water When the ship is being propelled ahead) is convex from hub to tip, while the following 4- edge 16 is convex only at its outer portion and concave at its inner portion.
The tip of each blade is bent toward the rear as indicated at 17, to form a barrier preventing the outward movement and cscape of the water or other fluid. To accomplish this, the bend 17 should have its inner surface (the one directed toward the hub) extended at least to a point (indicated at 18 in Fig. 3) where such surface is perpendicular to a plane of rotation, or in other words, perpendicular to a plane which is Serial No. 16,147.
itself perpendicular to the axis 10. Preferably, however, the bend is extended inwardly beyond this point 18, as shown, so as to form a flange or lip 19 directed in wardly and defining, in conjunction with the body llof the blade, a pocket 20 from which the water or other fluid can escape only at the open ends, as will be evident from Figs. 1 and 2. Lines drawn on the bend 17 and on the lip or flange 19 lengthwise of the pocket 20 are preferably straight, as will appear from the straight transverse lines bounding the blade tips in Fig. 1, said transverse lines being approximately perpendicular to the radial center lines of the re spective blades.
The marked increase in efliciency obtained bv the use of my improved propeller has been demonstrated convincingly by comparative tests. The barrier interposed by the bend 17 to the direct or radial outward escape of the water or other fluid is the main factor in securing this advantage, and when the flange or lip 19 is provided to form the pocket 20, the restraining effect of the blade tip on the tendency of the fluid to escape in a radial outward direction is increased very materially. Actual tests have shown that, under the same conditions, my propeller will increase the speed of a boat very materially above the speed obtained with propellers of standard makes heretofore considered the best on the market.
Various modificationsmay be made Without departing from the nature of my invention as set forth in the appended claims.
With the new propeller, the boat will hold her course readily even at low speeds, and in the docking or warping of large steamers, the tugs usually employed will either be dispensed with entirely, or at least a smaller number of tugs will suflice.
I claim:
1. A structure adapted for use as a propeller, comprising a central body or hub and a plurality of blades extending outwardly therefrom, each of said blades having a convex leading edge and a following edge convex at its outer portion and concave at its inner portion, said blade being widest at its tip, and contracted toward the hub, and being provided,at such tip, with a bend extending on the side which forms the active face of the blade, to form a barrier to the radial outward movement of the fluid, the outer edge of said tip being substantially straight, and the bend of the tip being formed with a flange extending inwardly toward said central body or hub and forming with said active surface of the blade, a transverse pocket or channel substantially straight in the direction of its length.
2. A structure adapted for use as a pro peller, comprising a central body or hub and a plurality of blades extending outwardly therefrom, each of said blades increasing in width outwardly and being provided, at its tip, with a bend extending on the side which forms the active face of the blade, to form a barrier to the radial outward movement of the fluid, the outer edge of said tip being substantially straight, and the bend of the tip being formed with a flange extending inwardly toward said central body or hub and forming with said active surface of the blade, a transverse pocket or channel substantially straight in the direction of its length.
3. A structure adapted for use as a propeller, comprising a central body or hub and a plurality of blades extending outwardly therefrom, each of said blades increasing in Width outwardly and being provided, at its tip, with a bend extending on the side which forms the active face of the blade, to form a barrier to the radial outward movement of the fluid, the said bend being formed with a flange extending inwardly toward said (entral body or hub and forming with said active surface of the blade, a pocket or channel ranging transversely of said blade.
In testimony whereof I have hereunto set my hand.
ERNEST BOENING.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16147A US1597175A (en) | 1925-03-17 | 1925-03-17 | Propeller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16147A US1597175A (en) | 1925-03-17 | 1925-03-17 | Propeller |
Publications (1)
Publication Number | Publication Date |
---|---|
US1597175A true US1597175A (en) | 1926-08-24 |
Family
ID=21775636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16147A Expired - Lifetime US1597175A (en) | 1925-03-17 | 1925-03-17 | Propeller |
Country Status (1)
Country | Link |
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US (1) | US1597175A (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5190441A (en) * | 1990-08-13 | 1993-03-02 | General Electric Company | Noise reduction in aircraft propellers |
US5554006A (en) * | 1995-08-03 | 1996-09-10 | Liao; Hsien-Chin | Ceiling fan blade configuration having a concave blade periphery |
US5575624A (en) * | 1996-02-14 | 1996-11-19 | Bogage; Gerald I. | Metal contoured blade for a reversible ceiling fan |
US6334705B1 (en) * | 1998-10-01 | 2002-01-01 | General Signal Corporation | Fluid mixing impellers with shear generating venturi |
US6352408B1 (en) | 2000-10-16 | 2002-03-05 | Robert B. Kilian | Slip inhibiting boat propeller |
US20030118446A1 (en) * | 2000-02-29 | 2003-06-26 | Wei Han | High-performance propeller |
DE10246886A1 (en) * | 2002-10-08 | 2004-04-22 | Helmut Obieglo | Marine propeller screw blade has flow edge as wing or nozzle normal to screw blade right across blade for added hydrodynamicity. |
US20040228210A1 (en) * | 2003-05-08 | 2004-11-18 | Ekato Ruhr- Und Mischtechnik Gmbh | Agitator |
US6881034B1 (en) | 2002-01-24 | 2005-04-19 | Thomas J. Riggs | Leaf rotor |
US7025642B1 (en) | 2004-09-16 | 2006-04-11 | Lear Baylor, Inc. | Boat propeller |
US20060187750A1 (en) * | 2002-03-01 | 2006-08-24 | Victor Aldrich | Rotary blending apparatus and system |
FR2883935A1 (en) * | 2005-04-01 | 2006-10-06 | Christian Hugues | Vortex reduction device for attachment to the end of a hydrofoil comprises a cylindrical tube with an ovoid inlet and a set of intercrossing helicoidal slits |
US20070268779A1 (en) * | 2006-05-09 | 2007-11-22 | Ekato Ruhr- Und Mischtechnik Gmbh | Agitator |
US20130045107A1 (en) * | 2010-03-19 | 2013-02-21 | Sp Tech | Propeller blade |
US8776427B1 (en) * | 2013-03-11 | 2014-07-15 | George Lening | Fish attraction device |
US20140363298A1 (en) * | 2013-06-07 | 2014-12-11 | National Taiwan Ocean University | Diffuser-type endplate propeller |
US10155575B2 (en) | 2013-06-07 | 2018-12-18 | National Taiwan Ocean University | Diffuser-type endplate propeller |
US10414486B2 (en) | 2015-11-30 | 2019-09-17 | General Electric Company | Airfoil for a rotary machine including a propellor assembly |
-
1925
- 1925-03-17 US US16147A patent/US1597175A/en not_active Expired - Lifetime
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5190441A (en) * | 1990-08-13 | 1993-03-02 | General Electric Company | Noise reduction in aircraft propellers |
US5554006A (en) * | 1995-08-03 | 1996-09-10 | Liao; Hsien-Chin | Ceiling fan blade configuration having a concave blade periphery |
US5575624A (en) * | 1996-02-14 | 1996-11-19 | Bogage; Gerald I. | Metal contoured blade for a reversible ceiling fan |
WO1997030290A1 (en) * | 1996-02-14 | 1997-08-21 | Bogage Gerald I | Metal contoured blade for a reversible ceiling fan |
US6334705B1 (en) * | 1998-10-01 | 2002-01-01 | General Signal Corporation | Fluid mixing impellers with shear generating venturi |
US20030118446A1 (en) * | 2000-02-29 | 2003-06-26 | Wei Han | High-performance propeller |
US6866482B2 (en) * | 2000-02-29 | 2005-03-15 | Wei Han | High-performance propeller |
US6352408B1 (en) | 2000-10-16 | 2002-03-05 | Robert B. Kilian | Slip inhibiting boat propeller |
US6881034B1 (en) | 2002-01-24 | 2005-04-19 | Thomas J. Riggs | Leaf rotor |
US20060187750A1 (en) * | 2002-03-01 | 2006-08-24 | Victor Aldrich | Rotary blending apparatus and system |
DE10246886A1 (en) * | 2002-10-08 | 2004-04-22 | Helmut Obieglo | Marine propeller screw blade has flow edge as wing or nozzle normal to screw blade right across blade for added hydrodynamicity. |
US7296925B2 (en) * | 2003-05-08 | 2007-11-20 | EKATO Rühr- und Mischtechnik GmbH | Agitator with improved blade configuration |
US20040228210A1 (en) * | 2003-05-08 | 2004-11-18 | Ekato Ruhr- Und Mischtechnik Gmbh | Agitator |
US7025642B1 (en) | 2004-09-16 | 2006-04-11 | Lear Baylor, Inc. | Boat propeller |
FR2883935A1 (en) * | 2005-04-01 | 2006-10-06 | Christian Hugues | Vortex reduction device for attachment to the end of a hydrofoil comprises a cylindrical tube with an ovoid inlet and a set of intercrossing helicoidal slits |
US20070268779A1 (en) * | 2006-05-09 | 2007-11-22 | Ekato Ruhr- Und Mischtechnik Gmbh | Agitator |
US7401974B2 (en) * | 2006-05-09 | 2008-07-22 | EKATO Rühr- und Mischtechnik GmbH | Agitator with finned agitator blade end |
US10294956B2 (en) | 2010-03-19 | 2019-05-21 | Sp Tech | Propeller blade |
US20130045107A1 (en) * | 2010-03-19 | 2013-02-21 | Sp Tech | Propeller blade |
US20200025212A1 (en) * | 2010-03-19 | 2020-01-23 | Sp Tech | Propeller blade |
US11448232B2 (en) * | 2010-03-19 | 2022-09-20 | Sp Tech | Propeller blade |
US8776427B1 (en) * | 2013-03-11 | 2014-07-15 | George Lening | Fish attraction device |
US20140317991A1 (en) * | 2013-03-11 | 2014-10-30 | George Lening | Fish attraction device |
US9326495B2 (en) * | 2013-03-11 | 2016-05-03 | George Lening | Fish attraction device |
US20140363298A1 (en) * | 2013-06-07 | 2014-12-11 | National Taiwan Ocean University | Diffuser-type endplate propeller |
CN104229109A (en) * | 2013-06-07 | 2014-12-24 | 柯永泽 | Diffusion type end plate propeller |
US10155575B2 (en) | 2013-06-07 | 2018-12-18 | National Taiwan Ocean University | Diffuser-type endplate propeller |
US10414486B2 (en) | 2015-11-30 | 2019-09-17 | General Electric Company | Airfoil for a rotary machine including a propellor assembly |
US11136109B2 (en) | 2015-11-30 | 2021-10-05 | General Electric Company | Airfoil for a rotary machine including a propellor assembly |
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