US573562A - Propeller - Google Patents
Propeller Download PDFInfo
- Publication number
- US573562A US573562A US573562DA US573562A US 573562 A US573562 A US 573562A US 573562D A US573562D A US 573562DA US 573562 A US573562 A US 573562A
- Authority
- US
- United States
- Prior art keywords
- blade
- propeller
- blades
- planes
- wittram
- 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
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000001788 irregular Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 1
Images
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
-
- 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
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/32—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor with roughened surface
-
- 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
Definitions
- My invention relates to improvements to be applied to propellers for vessels and other similar purposes.
- Figure l is an edge view showing the hub and one of the blades.
- Fig. 2 is a side view of the same.-
- the object of my invention is to provide a propeller with blades the fronts of which are corrugated or formed in planes having such an angle or curvature with each other as to form a greater surface than the actual length to impinge against the Water through which the blade is traveling, said corrugations or inclines decreasing in depth, so that the rear of the blade is less corrugated or irregular, or it may be straight in a radial line from the hub, thus concentrating the Water as it passes over the blade from front to rear edge in the manner of a converging trough and greatly strengthening the blade.
- My propeller-blade is formed With surfaces A inclining alternately to and from each other, so that the front edge of the blade presents a form of inclined planes united to form a zigzag or corrugated line from the hub to the outer end of the blade. From this front edge these inclines become shallower transversely and approach more nearly to a straight line, so that the rear edge B of the blade may be nearly straight.
- This construction gives, first, great stiffness to the propeller-blade by reason of the bracing which each of the angular inclined faces receives from the other, in conjunction with the diagonal or transverse decrease in the angle from front to rear.
- the channels or valleys thus formed in the blades also decrease and converge from front to rear, so that the body of water which engages the front portion of the blade during its revolution will be discharged more rapidly through the converging transverse channel.
- these blades may be of any suitable or Well-known outline, either converging from the hub toward the outer end or divergin g to any desired degree, and the pitch or angle of the blades may be also determined to suit the conditions under which the propeller is to be used.
- a propeller consisting of radial blades, the front edges of which are composed of incline'd planes meeting each other atan angle to form a zigzag line, said planes decreasing in depth transversely so that the rear edge of the blade is less irregular.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
(Model.)
F. WITTRAM.
PROPELLER.
No. 573,562. Patented Dec. 22, 1896.
I VEA/TOR Ww* f mw l ./lttornep WI TN ESSE S TH: mams mins co, mman-mc., wunmmou. n. r.
UNITED STATES PATENT OFFICE.
FREDERICK WITTRAM, OF SAN FRANCISCO, CALIFORNIA.
PROPELLER.-
SPECIFICATION forming part of Letters Patent No. 573,562, dated December 22, 1896.
Application filed July 23,1896. Serial No. 600.283. (Model.)
To a/ZZ whom t may concern.-
Be it known that I, FREDERICK WITTRAM,
a citizen of the United States, residing in the' city and county of San Francisco, State of California, have invented an Improvement in Propellers; and I hereby declare the following to be a full, clear, and exact description of the same.
My invention relates to improvements to be applied to propellers for vessels and other similar purposes.
It consists in a novel construction of the propeller-blade having corrugations decreasing in depth transversely from the front to the rear edge of the blade.
Referring to the accompanying drawings, Figure l is an edge view showing the hub and one of the blades. Fig. 2 is a side view of the same.-
The object of my invention is to provide a propeller with blades the fronts of which are corrugated or formed in planes having such an angle or curvature with each other as to form a greater surface than the actual length to impinge against the Water through which the blade is traveling, said corrugations or inclines decreasing in depth, so that the rear of the blade is less corrugated or irregular, or it may be straight in a radial line from the hub, thus concentrating the Water as it passes over the blade from front to rear edge in the manner of a converging trough and greatly strengthening the blade.
My propeller-blade is formed With surfaces A inclining alternately to and from each other, so that the front edge of the blade presents a form of inclined planes united to form a zigzag or corrugated line from the hub to the outer end of the blade. From this front edge these inclines become shallower transversely and approach more nearly to a straight line, so that the rear edge B of the blade may be nearly straight. This construction gives, first, great stiffness to the propeller-blade by reason of the bracing which each of the angular inclined faces receives from the other, in conjunction with the diagonal or transverse decrease in the angle from front to rear. The channels or valleys thus formed in the blades also decrease and converge from front to rear, so that the body of water which engages the front portion of the blade during its revolution will be discharged more rapidly through the converging transverse channel. It will be understood that these blades may be of any suitable or Well-known outline, either converging from the hub toward the outer end or divergin g to any desired degree, and the pitch or angle of the blades may be also determined to suit the conditions under which the propeller is to be used.
Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is-
1. A propeller consisting of radial blades, the front edges of which are composed of incline'd planes meeting each other atan angle to form a zigzag line, said planes decreasing in depth transversely so that the rear edge of the blade is less irregular.
2. In a propeller, blades extending radially from the'hubs With an appropriate pitch, the rear edges of said blades being slightly irregular and the front edges forming zigzag lines caused by the meeting of o ppositely-inclined planes whereby transverse valleys are formed, decreasing in depth from the front to the rear of the blade.
In witness whereof I have hereunto set my hand.
FREDERICK WITTRAM. Witnesses:
GEO. H. STRONG, S. H. NoURsE.
Publications (1)
Publication Number | Publication Date |
---|---|
US573562A true US573562A (en) | 1896-12-22 |
Family
ID=2642258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US573562D Expired - Lifetime US573562A (en) | Propeller |
Country Status (1)
Country | Link |
---|---|
US (1) | US573562A (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2962101A (en) * | 1958-02-12 | 1960-11-29 | Vaghi Joseph | Water screw propeller |
US4846629A (en) * | 1986-05-19 | 1989-07-11 | Usui Kokusai Sangyo Kabushiki Kaisha | Blades for high speed propeller fan |
US5275535A (en) * | 1991-05-31 | 1994-01-04 | Innerspace Corporation | Ortho skew propeller blade |
US20070234419A1 (en) * | 2006-03-28 | 2007-10-04 | Canon Kabushiki Kaisha | Image forming apparatus, control method thereof, system, program, and storage medium |
US20110142665A1 (en) * | 2010-11-10 | 2011-06-16 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US20110142666A1 (en) * | 2010-11-15 | 2011-06-16 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US20110223030A1 (en) * | 2010-12-16 | 2011-09-15 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8414261B2 (en) | 2011-05-31 | 2013-04-09 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8430638B2 (en) | 2011-12-19 | 2013-04-30 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US20130149162A1 (en) * | 2011-12-08 | 2013-06-13 | Inventus Holdings, Llc | Quiet wind turbine blade |
US8834127B2 (en) | 2011-09-09 | 2014-09-16 | General Electric Company | Extension for rotor blade in wind turbine |
US9494134B2 (en) | 2013-11-20 | 2016-11-15 | General Electric Company | Noise reducing extension plate for rotor blade in wind turbine |
US10180125B2 (en) | 2015-04-20 | 2019-01-15 | General Electric Company | Airflow configuration for a wind turbine rotor blade |
US10465652B2 (en) | 2017-01-26 | 2019-11-05 | General Electric Company | Vortex generators for wind turbine rotor blades having noise-reducing features |
US10746157B2 (en) | 2018-08-31 | 2020-08-18 | General Electric Company | Noise reducer for a wind turbine rotor blade having a cambered serration |
US20200277931A1 (en) * | 2015-12-17 | 2020-09-03 | Lm Wp Patent Holding A/S | Splitter plate arrangement for a serrated wind turbine blade |
US10767623B2 (en) | 2018-04-13 | 2020-09-08 | General Electric Company | Serrated noise reducer for a wind turbine rotor blade |
-
0
- US US573562D patent/US573562A/en not_active Expired - Lifetime
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2962101A (en) * | 1958-02-12 | 1960-11-29 | Vaghi Joseph | Water screw propeller |
US4846629A (en) * | 1986-05-19 | 1989-07-11 | Usui Kokusai Sangyo Kabushiki Kaisha | Blades for high speed propeller fan |
US5275535A (en) * | 1991-05-31 | 1994-01-04 | Innerspace Corporation | Ortho skew propeller blade |
US20070234419A1 (en) * | 2006-03-28 | 2007-10-04 | Canon Kabushiki Kaisha | Image forming apparatus, control method thereof, system, program, and storage medium |
US7976283B2 (en) * | 2010-11-10 | 2011-07-12 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US20110142665A1 (en) * | 2010-11-10 | 2011-06-16 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US20110142666A1 (en) * | 2010-11-15 | 2011-06-16 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8523515B2 (en) | 2010-11-15 | 2013-09-03 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US20110223030A1 (en) * | 2010-12-16 | 2011-09-15 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8267657B2 (en) | 2010-12-16 | 2012-09-18 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8414261B2 (en) | 2011-05-31 | 2013-04-09 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US8834127B2 (en) | 2011-09-09 | 2014-09-16 | General Electric Company | Extension for rotor blade in wind turbine |
US9341158B2 (en) * | 2011-12-08 | 2016-05-17 | Inventus Holdings, Llc | Quiet wind turbine blade |
US20130149162A1 (en) * | 2011-12-08 | 2013-06-13 | Inventus Holdings, Llc | Quiet wind turbine blade |
US8430638B2 (en) | 2011-12-19 | 2013-04-30 | General Electric Company | Noise reducer for rotor blade in wind turbine |
US9494134B2 (en) | 2013-11-20 | 2016-11-15 | General Electric Company | Noise reducing extension plate for rotor blade in wind turbine |
US10180125B2 (en) | 2015-04-20 | 2019-01-15 | General Electric Company | Airflow configuration for a wind turbine rotor blade |
US20200277931A1 (en) * | 2015-12-17 | 2020-09-03 | Lm Wp Patent Holding A/S | Splitter plate arrangement for a serrated wind turbine blade |
US11067057B2 (en) * | 2015-12-17 | 2021-07-20 | Lm Wp Patent Holding A/S | Splitter plate arrangement for a serrated wind turbine blade |
US10465652B2 (en) | 2017-01-26 | 2019-11-05 | General Electric Company | Vortex generators for wind turbine rotor blades having noise-reducing features |
US10767623B2 (en) | 2018-04-13 | 2020-09-08 | General Electric Company | Serrated noise reducer for a wind turbine rotor blade |
US10746157B2 (en) | 2018-08-31 | 2020-08-18 | General Electric Company | Noise reducer for a wind turbine rotor blade having a cambered serration |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US573562A (en) | Propeller | |
US2361676A (en) | Device for impelling and propelling fluid or gas or the like | |
US1371610A (en) | Screw-propeller | |
US652123A (en) | Screw-propeller. | |
US566292A (en) | Screw-propeller | |
US573351A (en) | Propeller-wheel | |
US1341653A (en) | Fan, propeller, &c. | |
US623424A (en) | Pompeo fieri | |
US698582A (en) | Propeller-wheel. | |
US701242A (en) | Screw-propeller. | |
US1234070A (en) | Screw-propeller. | |
US1030047A (en) | Propeller. | |
US360833A (en) | vogelsang | |
US342572A (en) | Propeller for vessels | |
US244197A (en) | Fobth | |
US624761A (en) | Screw-propeller | |
US1107101A (en) | Propeller. | |
US1033662A (en) | Propeller. | |
US342768A (en) | Linger | |
US208211A (en) | Improvement in screw-propellers | |
US1001951A (en) | Propeller. | |
US210982A (en) | Improvement in screw-propellers | |
US602651A (en) | Iobris kters ot | |
US620411A (en) | Feldt | |
US219837A (en) | Improvement in propellers for vessels |