GB311472A - Improvements in air screws, propellers or the like - Google Patents

Improvements in air screws, propellers or the like

Info

Publication number
GB311472A
GB311472A GB509428A GB509428A GB311472A GB 311472 A GB311472 A GB 311472A GB 509428 A GB509428 A GB 509428A GB 509428 A GB509428 A GB 509428A GB 311472 A GB311472 A GB 311472A
Authority
GB
United Kingdom
Prior art keywords
boss
shaft
secured
blades
collar
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
Application number
GB509428A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB509428A priority Critical patent/GB311472A/en
Publication of GB311472A publication Critical patent/GB311472A/en
Expired legal-status Critical Current

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
    • B64C11/34—Blade pitch-changing mechanisms mechanical automatic
    • B64C11/343—Blade pitch-changing mechanisms mechanical automatic actuated by the centrifugal force or the aerodynamic drag acting on the blades

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

311,472. Cook, F. Feb. 18, 1928. Screw propellers.-The pitch of screw propeller blades is varied automatically by the thrust under the control of a spring, for which purpose the boss of the blade moves longitudinally along the shaft to an extent limited by adjustable stops, the blades and the sleeve on the shaft being coupled by levers. A buffer cylinder acting as a dash-pot may be provided also. The axis of the blades is arranged so that the centre of fluid pressure thereon is close to that axis. Blades 5 secured to sleeves 2 are pivotally mounted in sockets on the boss 1 and at the root is secured an arm 6 which is connected by pins 10 to a sleeve 7 adapted to be secured to the shaft 3. The boss 1 has a collar 12 which abuts against the springs 11, the other end of which is held by a flange 13 on the shaft, this flange being adjustable for setting the spring and thus controlling the extent of pitch change. The boss is in driving engagement with the shaft and slides on keys or feathers 4. A fairing or spinner ring encloses the boss and other parts. Stops for limiting the motion of the boss are provided. On an extension of the boss and enclosing the shaft, is fitted a buffer cylinder whilst a piston is secured to the shaft itself and has smaller relief openings to provide a damping action. A collar fitted to the shaft may be moved thereon to limit the motion of the boss, such collar being under lever control from the cockpit of an aeroplane.
GB509428A 1928-02-18 1928-02-18 Improvements in air screws, propellers or the like Expired GB311472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB509428A GB311472A (en) 1928-02-18 1928-02-18 Improvements in air screws, propellers or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB509428A GB311472A (en) 1928-02-18 1928-02-18 Improvements in air screws, propellers or the like

Publications (1)

Publication Number Publication Date
GB311472A true GB311472A (en) 1929-05-16

Family

ID=9789631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB509428A Expired GB311472A (en) 1928-02-18 1928-02-18 Improvements in air screws, propellers or the like

Country Status (1)

Country Link
GB (1) GB311472A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422558A (en) * 1941-09-15 1947-06-17 Walter H Korff Adjustable pitch propeller
US2468004A (en) * 1944-04-01 1949-04-19 Robert Brooks Keller Automatic propeller pitch changing mechanism
US2494209A (en) * 1945-06-12 1950-01-10 United Aircraft Corp Rotor support
US2594160A (en) * 1946-05-17 1952-04-22 Hansson Oscar Variable pitch propeller with an axially movable hub
US2685932A (en) * 1949-01-06 1954-08-10 Erwin H Hartel Constant speed control means for variable pitch propellers
US4090812A (en) * 1976-11-19 1978-05-23 The United States Of America As Represented By The Secretary Of The Navy Axial fan with automatically controlled variable pitch blades
CN109985398A (en) * 2017-12-29 2019-07-09 重庆市永川区添贝玩具厂 A kind of bamboo dragonfly
CN110374795A (en) * 2019-07-02 2019-10-25 中国大唐集团新能源科学技术研究院有限公司 Scalable pneumatic equipment bladess

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422558A (en) * 1941-09-15 1947-06-17 Walter H Korff Adjustable pitch propeller
US2468004A (en) * 1944-04-01 1949-04-19 Robert Brooks Keller Automatic propeller pitch changing mechanism
US2494209A (en) * 1945-06-12 1950-01-10 United Aircraft Corp Rotor support
US2594160A (en) * 1946-05-17 1952-04-22 Hansson Oscar Variable pitch propeller with an axially movable hub
US2685932A (en) * 1949-01-06 1954-08-10 Erwin H Hartel Constant speed control means for variable pitch propellers
US4090812A (en) * 1976-11-19 1978-05-23 The United States Of America As Represented By The Secretary Of The Navy Axial fan with automatically controlled variable pitch blades
CN109985398A (en) * 2017-12-29 2019-07-09 重庆市永川区添贝玩具厂 A kind of bamboo dragonfly
CN109985398B (en) * 2017-12-29 2021-03-09 义乌市大明玩具有限公司 Bamboo dragonfly
CN110374795A (en) * 2019-07-02 2019-10-25 中国大唐集团新能源科学技术研究院有限公司 Scalable pneumatic equipment bladess
CN110374795B (en) * 2019-07-02 2024-03-29 中国大唐集团新能源科学技术研究院有限公司 Telescopic wind turbine blade

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