GB665629A - Improvements in two-speed gear power-transmission systems - Google Patents

Improvements in two-speed gear power-transmission systems

Info

Publication number
GB665629A
GB665629A GB3124/49A GB312449A GB665629A GB 665629 A GB665629 A GB 665629A GB 3124/49 A GB3124/49 A GB 3124/49A GB 312449 A GB312449 A GB 312449A GB 665629 A GB665629 A GB 665629A
Authority
GB
United Kingdom
Prior art keywords
clutch
speed
gear
drive
sleeve
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
GB3124/49A
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.)
Cierva Autogiro Co Ltd
Original Assignee
Cierva Autogiro Co Ltd
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 Cierva Autogiro Co Ltd filed Critical Cierva Autogiro Co Ltd
Priority to GB3124/49A priority Critical patent/GB665629A/en
Publication of GB665629A publication Critical patent/GB665629A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/10—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with one or more one-way clutches as an essential feature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/04—Helicopters
    • B64C27/12—Rotor drives

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

665,629. Change-speed gearing. CIERVA AUTOGIRO CO., Ltd., PULLIN, C. G., and WATSON, K. April 27, 1950 [Feb. 4, 1949], No. 3124/49. Class 80 (ii). In a constant-mesh two-speed gear for a helicopter rotor, high speed drive from an enginedriven sleeve 5 is via a manually-controllable friction clutch 9, a one-way roller clutch 19, sleeve 21 and gears 30, 31, while low-speed drive from the sleeve 5 is via a one-way roller clutch 22 and gears 32, 33, the roller cage 24 of the clutch 22 being engaged by one arm of bell-crank levers 26 pivoted in the gear 32 and loaded by springs 28 tending to turn the cage so as to disengage the clutch in opposition to centrifugal masses 27 on the other arm of the levers, so that the clutch 22 is disengaged below a certain critical speed. At starting, clutch 22 being disengaged, drive is taken up by the friction clutch 9 in high gear. When the critical speed is exceeded, the clutch 9 may be disengaged to allow the clutch 22 to take up the drive in low gear.
GB3124/49A 1949-02-04 1949-02-04 Improvements in two-speed gear power-transmission systems Expired GB665629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3124/49A GB665629A (en) 1949-02-04 1949-02-04 Improvements in two-speed gear power-transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3124/49A GB665629A (en) 1949-02-04 1949-02-04 Improvements in two-speed gear power-transmission systems

Publications (1)

Publication Number Publication Date
GB665629A true GB665629A (en) 1952-01-30

Family

ID=9752369

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3124/49A Expired GB665629A (en) 1949-02-04 1949-02-04 Improvements in two-speed gear power-transmission systems

Country Status (1)

Country Link
GB (1) GB665629A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007086906A2 (en) 2005-05-31 2007-08-02 Sikorsky Aircraft Corporation Variable speed transmission for a rotary wing aircraft
EP3428065A1 (en) * 2017-07-13 2019-01-16 Bell Helicopter Textron Inc. Variable-speed drive system for tiltrotor with fixed engine and rotating proprotor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007086906A2 (en) 2005-05-31 2007-08-02 Sikorsky Aircraft Corporation Variable speed transmission for a rotary wing aircraft
EP1893486A2 (en) * 2005-05-31 2008-03-05 Sikorsky Aircraft Corporation Variable speed transmission for a rotary wing aircraft
EP1893486A4 (en) * 2005-05-31 2013-04-24 Sikorsky Aircraft Corp Variable speed transmission for a rotary wing aircraft
EP3428065A1 (en) * 2017-07-13 2019-01-16 Bell Helicopter Textron Inc. Variable-speed drive system for tiltrotor with fixed engine and rotating proprotor
US10946954B2 (en) 2017-07-13 2021-03-16 Bell Helicopter Textron Inc. Variable-speed drive system for tiltrotor with fixed engine and rotating proprotor

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