GB451520A - Improvements in or relating to variable pitch airscrews for aircraft - Google Patents

Improvements in or relating to variable pitch airscrews for aircraft

Info

Publication number
GB451520A
GB451520A GB743835A GB743835A GB451520A GB 451520 A GB451520 A GB 451520A GB 743835 A GB743835 A GB 743835A GB 743835 A GB743835 A GB 743835A GB 451520 A GB451520 A GB 451520A
Authority
GB
United Kingdom
Prior art keywords
pointer
engine
relay
speed
spindle
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
GB743835A
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.)
Bristol Aeroplane Co Ltd
Original Assignee
Bristol Aeroplane 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 Bristol Aeroplane Co Ltd filed Critical Bristol Aeroplane Co Ltd
Priority to GB743835A priority Critical patent/GB451520A/en
Publication of GB451520A publication Critical patent/GB451520A/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
    • B64C11/303—Blade pitch-changing mechanisms characterised by comprising a governor

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Toys (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

451,520. Screw propellers. BRISTOL AEROPLANE CO., Ltd., FEDDEN, A. H. R., and OWNER, F. M., Filton House, Bristol. March 9, 1935, No. 7438. [Class 114] [See also Group XXXV] In a variable-pitch air screw the control mechanism is actuated automatically in accordance with the engine speed, the controlling means being either an electrical or a centrifugal mechanism which functions also as an engine-speed indicator. The speed-indicator has an armature 10 connected to a generator 13 driven by the aircraft engine and has a resistance 14 included in the circuit so that the deflection of the armature corresponds to the engine speed. There is fitted on the armature spindle 15 a disc 16 carrying two conducting strips 17, 18 cooperating with the brushes 19, 20, in a circuit which is part of the blade actuating mechanism. The disc 16 also carries a pointer 21 movable over a scale 22 indicating engine revolutions per minute and there is a further pointer 24 carried by a sleeve 23. The outer end of the spindle 15 is surrounded by the sleeve 23 which has a knob 25 whereby it may be adjusted so that the tail of the pointer 24 which carries a third brush 26 may also co-operate with the contacts 17, 18, The brushes 19, 20 and 26 are connected to a relay 29 which is on the input side of the battery 30. This relay may operate the piston of a hydraulic control mechanism or where the pitch changing mechanism is electrical will operate a relay. In a modification, a centrifugal governor 31 is driven by the engine and its spindle carries the disc 33 of insulating material, but with a conducting rim 34. The brush 35 is connected by a lead 36 to a source of electric current and mounted adjacent to the governor are a pair of arms 37, 38 carrying conductors 44, 45 in the relay circuit 46. The arms are held under spring restraint 42, 43 upon a rod having a rack-and-pinion gearing with a pointer 51. The pointer is further connected by gearing with a screw and nut mechanism 47, 48 upon the governor spindle. Changes in speed are followed by contact of the rim 34 with the brushes 44, 45 and a subsequent adjustment of the pitch of the blades. Specifications 151,917, and 250,292, [both in Class 114], and 411,601 are referred to.
GB743835A 1935-03-09 1935-03-09 Improvements in or relating to variable pitch airscrews for aircraft Expired GB451520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB743835A GB451520A (en) 1935-03-09 1935-03-09 Improvements in or relating to variable pitch airscrews for aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB743835A GB451520A (en) 1935-03-09 1935-03-09 Improvements in or relating to variable pitch airscrews for aircraft

Publications (1)

Publication Number Publication Date
GB451520A true GB451520A (en) 1936-08-07

Family

ID=9833099

Family Applications (1)

Application Number Title Priority Date Filing Date
GB743835A Expired GB451520A (en) 1935-03-09 1935-03-09 Improvements in or relating to variable pitch airscrews for aircraft

Country Status (1)

Country Link
GB (1) GB451520A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417176A (en) * 1940-04-24 1947-03-11 Ratie Rene Jean Variable pitch propeller control and indicator
US2440083A (en) * 1943-05-19 1948-04-20 Curtiss Wright Corp Control mechanism
US2449452A (en) * 1939-03-15 1948-09-14 Curtiss Wright Corp Propeller governor
US2451059A (en) * 1942-08-05 1948-10-12 Gen Motors Corp Propeller mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449452A (en) * 1939-03-15 1948-09-14 Curtiss Wright Corp Propeller governor
US2417176A (en) * 1940-04-24 1947-03-11 Ratie Rene Jean Variable pitch propeller control and indicator
US2451059A (en) * 1942-08-05 1948-10-12 Gen Motors Corp Propeller mechanism
US2440083A (en) * 1943-05-19 1948-04-20 Curtiss Wright Corp Control mechanism

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