GB397486A - Screw propellers - Google Patents
Screw propellersInfo
- Publication number
- GB397486A GB397486A GB1734/32A GB173432A GB397486A GB 397486 A GB397486 A GB 397486A GB 1734/32 A GB1734/32 A GB 1734/32A GB 173432 A GB173432 A GB 173432A GB 397486 A GB397486 A GB 397486A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blades
- pitch
- hub
- tends
- pinion
- 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
-
- 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
- B64C11/36—Blade pitch-changing mechanisms mechanical non-automatic
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transmission Devices (AREA)
- Gears, Cams (AREA)
Abstract
397,486. Screw propellers. BENDIX AVIATION CORPORATION, 105, West Adams Street, Chicago, U.S.A. Jan. 20, 1932, No. 1734. Convention date, Jan. 27, 1931. [Class 114.] The pitch of the blades of a screw propeller is varied in accordance with the difference between the air thrust on the blades and the driving torque of the shaft. The blades 6 are rotatably mounted in the hub 9 by a split sleeve 19 gripped by a pinion 18 and mounted in bearings 21, 22. The hub is mounted upon helical rows of balls 10a provided in a block 10 fitted upon the splined shaft 7. Springs 23 are mounted between the hub 9 and a plate 17 rotatably mounted upon the block 10, the plate 17 also carrying rack bars 15 which engage the pinions 18. The driving torque tends to set the blades at a maximum pitch and the air thrust tends to reduce the pitch and the springs are adjusted so that the blades take up a position which is proportional to the difference of these two values. Weights 24 are pivoted to the hub and are formed with quadrants engaging the pinion 18 and the centrifugal force tends to increase the pitch to balance the torsion acting on the blades which tends to decrease the pitch.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US397486XA | 1931-01-27 | 1931-01-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB397486A true GB397486A (en) | 1933-08-21 |
Family
ID=21907157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1734/32A Expired GB397486A (en) | 1931-01-27 | 1932-01-20 | Screw propellers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB397486A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107472514A (en) * | 2017-09-20 | 2017-12-15 | 上海歌尔泰克机器人有限公司 | Variable-pitch propeller and unmanned plane |
-
1932
- 1932-01-20 GB GB1734/32A patent/GB397486A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107472514A (en) * | 2017-09-20 | 2017-12-15 | 上海歌尔泰克机器人有限公司 | Variable-pitch propeller and unmanned plane |
CN107472514B (en) * | 2017-09-20 | 2024-03-08 | 上海歌尔泰克机器人有限公司 | Variable pitch propeller and unmanned aerial vehicle |
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