GB412434A - Improvements in and relating to aerial propellers with variable pitch - Google Patents
Improvements in and relating to aerial propellers with variable pitchInfo
- Publication number
- GB412434A GB412434A GB2235033A GB2235033A GB412434A GB 412434 A GB412434 A GB 412434A GB 2235033 A GB2235033 A GB 2235033A GB 2235033 A GB2235033 A GB 2235033A GB 412434 A GB412434 A GB 412434A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- propeller
- nut
- shaft
- flanges
- 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)
Abstract
412,434. Variable pitch screw propellers. AIVAZ, J., 87, Rue de Monceau, Paris. Feb. 14, 1933, No. 22350. Divided on 411,601 under which a Specification was laid open to inspection under Sect. 91 of the Acts, Aug. 18, 1933. [Class 114.] A variable-pitch screw propeller wherein pitch variation is effected by power such as that obtainable from the propeller shaft has as its varying gear sets of screw and nut mechanism disposed around the axis of the propeller each set comprising an endwise screw member which is directly connected to a propeller blade and preferably by a rack and pinion mechanism. The main screw operating mechanism has end clutches whereby the gear may be automatically disconnected at the two end positions of its motion. The shaft 7 is adapted to be driven by epicyclic gear from the propeller shaft and controlled by braking mechanism and has keyed thereto flanges 9 with ratchet teeth 8, these flanges being constrained inwardly by helical springs. Freely mounted on the shaft is a screw 2 also having end flanges with corresponding ratchet teeth 8. Mounted on the screw is a nut member 3 having on one side rack teeth adapted to engage a pinion 6 on the root of the blade 1. Normally one of the ratchet teeth will be in engagement and upon application of the brake of the epicyclic gear, the screw and therefore the nut receive motion and communicate it to the blade. When the nut has reached the end of its travel, projections thereon abut against the corresponding flange 9 and slide it endwise so that its teeth come out of engagement from those on the screw which is thereby disconnected. Specification 411,601 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2235033A GB412434A (en) | 1933-02-14 | 1933-02-14 | Improvements in and relating to aerial propellers with variable pitch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2235033A GB412434A (en) | 1933-02-14 | 1933-02-14 | Improvements in and relating to aerial propellers with variable pitch |
Publications (1)
Publication Number | Publication Date |
---|---|
GB412434A true GB412434A (en) | 1934-06-28 |
Family
ID=10177976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2235033A Expired GB412434A (en) | 1933-02-14 | 1933-02-14 | Improvements in and relating to aerial propellers with variable pitch |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB412434A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2548045A (en) * | 1945-08-20 | 1951-04-10 | Harry J Nichols | Amplitorque controllable pitch propeller |
US4047842A (en) * | 1976-04-19 | 1977-09-13 | Curtiss-Wright Corporation | Variable pitch mechanism for fan blades |
US20140205457A1 (en) * | 2013-01-18 | 2014-07-24 | Snecma | System for changing the pitch of the blades of a propeller |
-
1933
- 1933-02-14 GB GB2235033A patent/GB412434A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2548045A (en) * | 1945-08-20 | 1951-04-10 | Harry J Nichols | Amplitorque controllable pitch propeller |
US4047842A (en) * | 1976-04-19 | 1977-09-13 | Curtiss-Wright Corporation | Variable pitch mechanism for fan blades |
US20140205457A1 (en) * | 2013-01-18 | 2014-07-24 | Snecma | System for changing the pitch of the blades of a propeller |
US9884675B2 (en) * | 2013-01-18 | 2018-02-06 | Snecma | System for changing the pitch of the blades of a propeller |
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