US2052454A - Variable pitch propeller - Google Patents
Variable pitch propeller Download PDFInfo
- Publication number
- US2052454A US2052454A US57618A US5761836A US2052454A US 2052454 A US2052454 A US 2052454A US 57618 A US57618 A US 57618A US 5761836 A US5761836 A US 5761836A US 2052454 A US2052454 A US 2052454A
- Authority
- US
- United States
- Prior art keywords
- blades
- propeller
- blade
- ring
- pitch
- 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
Links
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/32—Blade pitch-changing mechanisms mechanical
- B64C11/34—Blade pitch-changing mechanisms mechanical automatic
- B64C11/343—Blade pitch-changing mechanisms mechanical automatic actuated by the centrifugal force or the aerodynamic drag acting on the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05B2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05B2260/75—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism not using auxiliary power sources, e.g. servos
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05B2260/77—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism driven or triggered by centrifugal forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Description
'Ag.`25l,41936. l LJELLWOoD-aD-.yE-IIAL 2,052,454
VARIABLE 'P1-TCH PRoPELLERz v yFiled Jan. 4, 1936 2 Sh'eefs-l-Sheet 1 l 2f 1 1 @o 'za @1' ills Aug. 2.5, 1936. l. l. ELLWOOD, 2D., Er AL 2,052,454 Y Y VARIABLE FITCH PROPELLER v Filed Jari 4, 1936 sheets-sheet 2 l Y /0 /ZS Patented Aug. 25, 1936 VARIABLEl Prron PROPELLER Isaac Leonard Ellwocd'l 2d, and Blake Burton, Williams Bay, Wis.
Application January 4, 1936, serial No. 57,618
z claims. (c1. 17o-ssi The invention relates toa variable pitch propeller and more especially to an automatic pitch controlled propeller. l
The primary object of the invention is the provision of a propeller of this character, wherein through centrifugal force the angular disposition of the blades of the propeller are automatically changed so that when the propeller is in use the `'velocity of the wind when least on the blades of the propeller the centrifugal force Will be nil and as the wind increases a centrifugal action is set up due to increased rotationV of the propeller so that the blades will become automatically adjusted so as to assure a variation in the degrees of pitch of such blades dependent on the amount Aof centrifugal force exerted thereon sof asto have the propeller obtain a near or constant revolution thereby minimizing variation and wear. Another object of the invention is the provision of a propeller of this character, wherein the bladesl thereof are supported in a novel manner so that under varying wind velocity the said blades through centrifugal force will be caused to automatically change their pitch and thus assuring near constant propeller revolution, the propeller being of novel construction and `is adaptable for driving and driven purposes.
A further object of the invention is the provision of a propeller of this character, which is comparatively simple in construction, thoroughly reliable and efficient in its operation, possessing but few parts with resultant strength and durability and also one which is comparatively inexpensive to manufacture.
With these and other objects in view, the in vention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings, which disclose thepreferred embodiment of the invention, and pointed out in the claims hereunto appended.
In the accompanying drawings:
Figure 1 is a-plan view of a propellerv constructed in accordance with the invention.
Figure 2 is a sectional view through one of its blades.
Figure 3 is a view similar to Figure 2 showing the blade positioned at a different angle and aul tomatically changed by centrifugal force.
Figure 4 is a perspective view of the pitch changing shaft and hub for one ofthe blades of the propeller.
propeller constituting the present invention and hereinafter fully described. i Fitted upon this shaft A is a blade carrying ring III, it having a tapered center opening II for accommodating the tapered end I2 of the shaft A, the said ring 15 v being keyed or splined upon said shaft. Rotatably fitted with the shaft I2 next to the ring I0 is a synchronizing disk I3 having formed therein tangentiallydisposed slots I4 which are preferably equally distanced or spaced from each other and have slidably iitted therein coupling' yokes I5 for the swivel connection of the annularly grooved inner end I6 of pitch changing shafts I1 which are radially arranged with relation to the ring I0 and have fixed thereto hubs I8 which are rotatably an'd slidably fitted in hollow tubular stems I9, each at its inner end being fixed in a capped bearing 20 on 'the ring IIJ. Upon this stem I9 turns a blade 2I, there being three in number in this instance for the 30 completed propeller. The blade 2| for a larger portion of its length is centrally longitudinally slitted at 22 for occupancy of the stem in said slit while the outer wider tip end 23 of the blade which carries a weight 24 in the nature of a 35 blade support is made fast by a coupling 25 with the outer end of the shaft I1 which is passed centrally through the stem I9. The blade 2l has the slit 22 widened at 26 next to the tip 23 and at- 21 next to the inner end of said blade and 4o this widened portion 21 of the slit opens through the inner end of the said blade while bridging the said widened portion 21 of the slit at opposite sides of the blade 2| are clips 28 to loosely embrace the stem I9 between annular abutments 45 29, formed on the said stem and spaced the re-l -quired distance from each other, the stem I9 at its outer end being outturned to provide an annular abutment 30 within the widened portion 26 of the slit 22 next to the tip 23 of said blade. Thus the blade 2| with its tip is slidably and rotatably `iournaled on the stern I9 and the sliding displacement of the said blade '.on the stern is limited by the annular abutments 29 and 30, respectively.
The stem Il at its inner end is fixed in its companion capped bearing!) by a screw Il having a reduced inner end 32 loosely engaged in a spiral channel or groove I3 formed in the hub Il on the control shaft I1 and this hub slides radially to produce the turning of the same with the resultant adjustment of the blades to vary the pitch of the same. Y
In the working of the inopeller under wind velocity as the same increases or decreases against the blades 2| of the propeller through centrifugal force or centrifugal action the pitch or angular disposition of the blade will be automatically changed and this coming about uby the turning of the hubs I8 on the shafts ilv which are moved by the slotted disk il, these shafts being swiveled in the yokes i5 working in the slots ilinsaiddisk i3. 1
The disk I3 has connected to it a series of coiled tensioning springs Il, these being also con nected to the ring il and function to return the blades to a neutral position as that shown in Figures 1 and 2 ofthe drawings. whence `the yokes i5 will have traveled in the slots iii to the inner ends di.' these slots, thedisk I3 being rotated in a direction by the tension of the springs 34 for this purpose.
It should be apparent from Figures l, 2 and 3 cf the drawings that when the velocita.r ci the wind increases and strikes the blades 2i this causes a momentary increase in propulsion of the propeller. Because of this increase centrifugal force causes the weighted tips 2li of the blade to move outwasdiy, thereby pulling upon the shafts l'' which rotates the disk i3 against the resistance of springs Sii. This outfzsaidmcvement of the shafts i'i through the hubs i@ thererx on engaging the pin ends S2 ci the screws ii, thatJ is to say, these pin ends 32 Working in the .grooves or channels iii in said hubs iii automatically effect a changing oi Vthe pitchxof 'the blades di so that the propellerv through pitch variation ci its blades will have n near constant revolution during the variations in the velocity oi the wind current.
The ring it has built upon its face next the disk i3 anlannular track Si for the play oi.' the said disk thereon during the changing of the position ci1 the `disk under the automatic pitch changing action of the propeller.
The stems Il for the blades 2|, each has tted in its outer end a bushing il through which passes the shaft Il so as to center the shaft within the stcmjl particularly at the'outer end thereof while the hub Il centers said shaft Visi; the inner end of the stem. In the changing of the pitch of the blades 2l these have a limited reciprocating movement on the stems I! and auch movementaare restricted by the abutments 2l and Il as will'be apparent from Figures'l and 2 of drawings.
The weights 2l on the tips 23 of the blades are preferably of segmental form and are made secure by suitable fasteners 31- which pass through the weights and Vsaid tips while the rotes il are loosely held inthe slots I4 in the disk and the blades 2| radially disposed with respect I to the ring I0, which is a carrier body for the blades.
The clockwise and counter-clockwise movements of the disk. I3 result in the pitch changing of the blades as the shafts i1 are displaced and through the hubs le thereon the said shafts rotate or turn the blades 2i to the pitch necessary under ordinary action in the rotation'of the propalier.
It is, of course, understood that changes. variations and modifications may be made in the invention as come properly within the scope of the `appended claims without departing from the spirit of the said invention or sacrificing any of its advantages.
What is claimedis: Y Y
i. In a propeller of the character described a. rotary shaft, a. blade/carrying ring carried by said shaft,` a synchronizing disk rotatable with respect to said ring and having tangentially disposed slots, coupling yokes swiveled in said slots, pitch changing shafts radially supported with relation to said ring, tubular stems about said pitch changing shafts, propeller blades rotatable about and shlftable on said stems and having the pitch changing shafts fined thereto, hubs diced tov said pitch changing shafts and having spiral connections with the stems, spring tensioned means connected with 'the ring and disk for normally holding the coupling yokes at the inner ends of the tangential slots in said dish, l*e blades having wider portions at their outer ends and provided with longitudinal slots accommodating said stems, and weights on tile wider ends of said blades.
2. In a propeller oi the character described a rotary shaft. a blade carrying ring carried. by said shaft, a synchronizing disk rotatable with respect to said ring and having tangentiaily dieposed slots, coupling yokes swiveled in said slots, pitch changing shafts radially supported with relation to said ring, tubular stems about said pitch changing shafts, propeller blades rotatable about and shiftable on said stems and having the pitch changing shafts fixed thereto, hubs fixed to said pitch changing shafts and having spiral connections with the stems, spring tensioned means connected with the ring and disk for normally holding the coupling ydkes at the inner ends of the tangential slots in said disk, the
blades having wider portions at their outer ends and provided with longitudinal slots accommodating sald stems, weights on the wider ends of ou said blades, and bearings on the ring and accommodating the hubs of said pitch changing shafts. Y
ISAAC LEONARD EILWOOD. n. BLAKE BURTON.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57618A US2052454A (en) | 1936-01-04 | 1936-01-04 | Variable pitch propeller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57618A US2052454A (en) | 1936-01-04 | 1936-01-04 | Variable pitch propeller |
Publications (1)
Publication Number | Publication Date |
---|---|
US2052454A true US2052454A (en) | 1936-08-25 |
Family
ID=22011721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US57618A Expired - Lifetime US2052454A (en) | 1936-01-04 | 1936-01-04 | Variable pitch propeller |
Country Status (1)
Country | Link |
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US (1) | US2052454A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2505969A (en) * | 1946-11-25 | 1950-05-02 | Marcellus L Jacobs | Apparatus for fixing blade angulation of wind-driven multiblade propellers |
US2521187A (en) * | 1945-10-20 | 1950-09-05 | Arkell Safety Bag Co | Bag machine and method |
US2685932A (en) * | 1949-01-06 | 1954-08-10 | Erwin H Hartel | Constant speed control means for variable pitch propellers |
US2998080A (en) * | 1958-07-22 | 1961-08-29 | Jr George H Moore | Automatically adjustable propeller |
US4352633A (en) * | 1980-04-25 | 1982-10-05 | Tassen Devon E | Windmill blade stalling and speed control device |
US4374631A (en) * | 1981-05-21 | 1983-02-22 | Fayette Manufacturing Corporation | Windmill speed limiting system utilizing hysteresis |
WO1983000899A1 (en) * | 1981-09-10 | 1983-03-17 | Felt Products Mfg Co | Wind energy conversion system |
US5219272A (en) * | 1991-12-02 | 1993-06-15 | Brunswick Corporation | Variable pitch marine propeller with hydrodynamic shifting |
US5290147A (en) * | 1991-12-02 | 1994-03-01 | Brunswick Corporation | Variable pitch marine propeller with shift biasing and synchronizing mechanism |
US5599168A (en) * | 1995-08-23 | 1997-02-04 | Lund; Arnold M. | Wind turbine adaptable to wind direction and velocity |
US20030071468A1 (en) * | 2001-10-17 | 2003-04-17 | Platt Steve Anderson | Wind powered generator |
US20050238489A1 (en) * | 2004-04-27 | 2005-10-27 | Lund Arnold M | Control vane for a wind turbine |
US20090184519A1 (en) * | 2008-01-18 | 2009-07-23 | Jacob Johannes Nies | Speed controlled pitch system |
US20150093246A1 (en) * | 2013-09-30 | 2015-04-02 | Gu Co., Ltd. | Blade pitch controller for small-scale wind power generation system |
US20150308405A1 (en) * | 2012-11-22 | 2015-10-29 | Korea. Ropax | Tilt-type rotor blade apparatus for vertical type wind power generation |
US20170355447A1 (en) * | 2016-06-10 | 2017-12-14 | Gopro, Inc. | Thrust-Dependent Variable Blade Pitch Propeller |
IT202000010372A1 (en) * | 2020-05-08 | 2021-11-08 | Matteo BABETTO | VARIABLE PITCH PROPELLER |
US11332242B2 (en) * | 2019-08-14 | 2022-05-17 | Unmanned Aerospace Llc | Aerial vehicle |
US11448184B1 (en) * | 2022-01-26 | 2022-09-20 | United Arab Emirates University | Self-adaptive variable twist morphing blade for wind turbine |
-
1936
- 1936-01-04 US US57618A patent/US2052454A/en not_active Expired - Lifetime
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2521187A (en) * | 1945-10-20 | 1950-09-05 | Arkell Safety Bag Co | Bag machine and method |
US2505969A (en) * | 1946-11-25 | 1950-05-02 | Marcellus L Jacobs | Apparatus for fixing blade angulation of wind-driven multiblade propellers |
US2685932A (en) * | 1949-01-06 | 1954-08-10 | Erwin H Hartel | Constant speed control means for variable pitch propellers |
US2998080A (en) * | 1958-07-22 | 1961-08-29 | Jr George H Moore | Automatically adjustable propeller |
US4352633A (en) * | 1980-04-25 | 1982-10-05 | Tassen Devon E | Windmill blade stalling and speed control device |
US4374631A (en) * | 1981-05-21 | 1983-02-22 | Fayette Manufacturing Corporation | Windmill speed limiting system utilizing hysteresis |
WO1983000899A1 (en) * | 1981-09-10 | 1983-03-17 | Felt Products Mfg Co | Wind energy conversion system |
US4495423A (en) * | 1981-09-10 | 1985-01-22 | Felt Products Mfg. Co. | Wind energy conversion system |
US5219272A (en) * | 1991-12-02 | 1993-06-15 | Brunswick Corporation | Variable pitch marine propeller with hydrodynamic shifting |
US5290147A (en) * | 1991-12-02 | 1994-03-01 | Brunswick Corporation | Variable pitch marine propeller with shift biasing and synchronizing mechanism |
US5599168A (en) * | 1995-08-23 | 1997-02-04 | Lund; Arnold M. | Wind turbine adaptable to wind direction and velocity |
WO2003033908A2 (en) * | 2001-10-17 | 2003-04-24 | Steve Anderson Platt | Portable wind power generator |
US20030071468A1 (en) * | 2001-10-17 | 2003-04-17 | Platt Steve Anderson | Wind powered generator |
WO2003033908A3 (en) * | 2001-10-17 | 2003-05-30 | Steve Anderson Platt | Portable wind power generator |
US7218013B2 (en) | 2001-10-17 | 2007-05-15 | Steve Anderson Platt | Wind powered generator |
US20050238489A1 (en) * | 2004-04-27 | 2005-10-27 | Lund Arnold M | Control vane for a wind turbine |
US7014416B2 (en) | 2004-04-27 | 2006-03-21 | Arnold Morten Lund | Control vane for a wind turbine |
US7956482B2 (en) * | 2008-01-18 | 2011-06-07 | General Electric Company | Speed controlled pitch system |
US20090184519A1 (en) * | 2008-01-18 | 2009-07-23 | Jacob Johannes Nies | Speed controlled pitch system |
US20150308405A1 (en) * | 2012-11-22 | 2015-10-29 | Korea. Ropax | Tilt-type rotor blade apparatus for vertical type wind power generation |
US9709031B2 (en) * | 2012-11-22 | 2017-07-18 | Korea. Ropax | Tilt-type rotor blade apparatus for vertical type wind power generation |
US20150093246A1 (en) * | 2013-09-30 | 2015-04-02 | Gu Co., Ltd. | Blade pitch controller for small-scale wind power generation system |
US20170355447A1 (en) * | 2016-06-10 | 2017-12-14 | Gopro, Inc. | Thrust-Dependent Variable Blade Pitch Propeller |
US11332242B2 (en) * | 2019-08-14 | 2022-05-17 | Unmanned Aerospace Llc | Aerial vehicle |
US11873087B2 (en) | 2019-08-14 | 2024-01-16 | Unmanned Aerospace Llc | Aerial vehicle |
IT202000010372A1 (en) * | 2020-05-08 | 2021-11-08 | Matteo BABETTO | VARIABLE PITCH PROPELLER |
US11448184B1 (en) * | 2022-01-26 | 2022-09-20 | United Arab Emirates University | Self-adaptive variable twist morphing blade for wind turbine |
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