GB630135A - Improvements in or relating to variable pitch propellers - Google Patents
Improvements in or relating to variable pitch propellersInfo
- Publication number
- GB630135A GB630135A GB22740/46A GB2274046A GB630135A GB 630135 A GB630135 A GB 630135A GB 22740/46 A GB22740/46 A GB 22740/46A GB 2274046 A GB2274046 A GB 2274046A GB 630135 A GB630135 A GB 630135A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- pump
- cages
- controlled
- driven
- 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
- B64C11/306—Blade pitch-changing mechanisms specially adapted for contrarotating propellers
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Retarders (AREA)
Abstract
630,135. Variable pitch propellers. BREGUET, L. July 30, 1946, No. 22740. .Convention date, Aug. 11, 1944. [Class 114] In a propeller of the type in which the pitchvarying worms are actuated by a differential gear, the action of the differential is controlled by the shaft 6 through a gear-box from the engine-driven shaft 5. The speeds of the planet cages are controlled by two circulating pumps 50, 53 driven from these cages, throttling of the pump outputs causing movement of the cages and hence of the shaft 6. Rise in pressure in the pumps closes clutch 64 and so drives a pitch indicating and limit stop shaft 60. The device is controlled electrically by switches 98, 101, the former being operated to give hand control through the lever 76, which moves valve 75 to close the outlet of either pump 50 or 53 as desired. Switch 101 can be positioned as desired on contacts 102, 103 ... 107, and the necessary pump outlet closed until the pitch angle required is reached, when cams driven from the shaft 60 break the circuit of either solenoid 88, 109, releasing the valves 87, 89 to open the pump circuits.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR630135X | 1944-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB630135A true GB630135A (en) | 1949-10-06 |
Family
ID=8990861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22740/46A Expired GB630135A (en) | 1944-08-11 | 1946-07-30 | Improvements in or relating to variable pitch propellers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB630135A (en) |
-
1946
- 1946-07-30 GB GB22740/46A patent/GB630135A/en not_active Expired
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