GB400564A - Improvements in and relating to blades for electric fans - Google Patents
Improvements in and relating to blades for electric fansInfo
- Publication number
- GB400564A GB400564A GB1841333A GB1841333A GB400564A GB 400564 A GB400564 A GB 400564A GB 1841333 A GB1841333 A GB 1841333A GB 1841333 A GB1841333 A GB 1841333A GB 400564 A GB400564 A GB 400564A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fan
- blades
- blade
- plane
- leading
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
400,564. Screw fans. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(General Electric Co. ; Schenectady, New York, U.S.A.) June 28, 1933, No. 18413. [Class 110 (i).] The blades of a fan are so constructed that the leading edge 16 of each is concave in shape and pointed near its periphery ; it extends behind the trailing edge 17 of the preceding blade. A preferred fan construction with three blades is shown, and the combined area of the blades is substantially the same as the disc area of the fan. The blades are secured to the hub 14 over resilient packing 19 by screws 15. A number of arcs a .. j with the fan axis as centre are shown on the plan view of a blade, Fig. 3. The peripheral edge 18 is a circular arc a in the trailing half of the blade, and a curve of decreasing radius in the leading half of the blade. Some air may therefore be drawn in over the leading part of the peripheral edge. Each of the arcs a .. j lies in a plane and the angle made by that plane with the plane of the fan increases from the outside arc a to the inside arc j. In a modification, each blade is substantially a plane surface, except at the trailing end where an additional bend is given to compensate for decreasing pitch. The construction and arrangement diminishes the noise caused by the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1841333A GB400564A (en) | 1933-06-28 | 1933-06-28 | Improvements in and relating to blades for electric fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1841333A GB400564A (en) | 1933-06-28 | 1933-06-28 | Improvements in and relating to blades for electric fans |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB400564A true GB400564A (en) | 1933-10-26 |
Family
ID=10112023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1841333A Expired GB400564A (en) | 1933-06-28 | 1933-06-28 | Improvements in and relating to blades for electric fans |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB400564A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122091A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | There is antecurvature efficient quiet impeller |
-
1933
- 1933-06-28 GB GB1841333A patent/GB400564A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122091A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | There is antecurvature efficient quiet impeller |
| CN106122091B (en) * | 2016-08-23 | 2017-11-24 | 佛山市南海九洲普惠风机有限公司 | With antecurvature efficient Jing Yin impeller |
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