GB496087A - Improvements in and relating to air screws with a variable and reversible pitch - Google Patents

Improvements in and relating to air screws with a variable and reversible pitch

Info

Publication number
GB496087A
GB496087A GB4615/38A GB461538A GB496087A GB 496087 A GB496087 A GB 496087A GB 4615/38 A GB4615/38 A GB 4615/38A GB 461538 A GB461538 A GB 461538A GB 496087 A GB496087 A GB 496087A
Authority
GB
United Kingdom
Prior art keywords
sleeve
nut
rotation
gear
feb
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
GB4615/38A
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.)
RENE JEAN FONDANAICHE
Original Assignee
RENE JEAN FONDANAICHE
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 RENE JEAN FONDANAICHE filed Critical RENE JEAN FONDANAICHE
Publication of GB496087A publication Critical patent/GB496087A/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
    • B64C11/36—Blade pitch-changing mechanisms mechanical non-automatic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Gear Transmission (AREA)
  • Transmission Devices (AREA)

Abstract

496,087. Airscrews. FONDANAICHE, R. J. Feb. 14, 1938, No. 4615. Convention date, Feb. 13, 1937. [Class 114] The gear producing variation of pitch of an airscrew includes tubular shaft which is longitudinally movable within the propeller hub. The tubular shaft 6 which is longitudinally movable in a hub 4 is keyed thereto so as to be relatively non-rotatable and at its outer end carries helical splines 23 which engage a nut member 24 mounted for rotation but not longitudinal motion. Rotation of the nut 24 is communicated to a bevel wheel 26 which gears with a bevel wheel 27 on the blade root. This drive may be supported at an intermediate point upon ball races in the propeller hub. The inner end of the tube carries a sleeve 10 which is coupled to another sleeve 31 through ball members 11, 11a this latter sleeve 31 being secured to a tube 9 which is given longitudinal motion by reason of rotation of a nut upon an outer thread 22. The nut is provided with an outer set of teeth 20 which gear with a worm 19 on the shaft of an actuating mechanism such as an electric motor. Normally the sleeve 9 is stationary whilst the sleeve 6 rotates with the propeller and this is permitted by reason of the ball race connection 11. The combined tubes 6 and 9 pass through the final drive member 2 of the gear reduction from the driving engine.
GB4615/38A 1937-02-13 1938-02-14 Improvements in and relating to air screws with a variable and reversible pitch Expired GB496087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR496087X 1937-02-13

Publications (1)

Publication Number Publication Date
GB496087A true GB496087A (en) 1938-11-24

Family

ID=8904842

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4615/38A Expired GB496087A (en) 1937-02-13 1938-02-14 Improvements in and relating to air screws with a variable and reversible pitch

Country Status (1)

Country Link
GB (1) GB496087A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395762A (en) * 1966-09-07 1968-08-06 Saito Patent Office Pitch controlling apparatus of a propeller of ships

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395762A (en) * 1966-09-07 1968-08-06 Saito Patent Office Pitch controlling apparatus of a propeller of ships

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