GB460921A - Variable pitch propellers - Google Patents

Variable pitch propellers

Info

Publication number
GB460921A
GB460921A GB22440/35A GB2244035A GB460921A GB 460921 A GB460921 A GB 460921A GB 22440/35 A GB22440/35 A GB 22440/35A GB 2244035 A GB2244035 A GB 2244035A GB 460921 A GB460921 A GB 460921A
Authority
GB
United Kingdom
Prior art keywords
control
blade
arm
thermic
cylinder
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
GB22440/35A
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.)
GUSTAV SCHWARZ GmbH
Original Assignee
GUSTAV SCHWARZ GmbH
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 GUSTAV SCHWARZ GmbH filed Critical GUSTAV SCHWARZ GmbH
Publication of GB460921A publication Critical patent/GB460921A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

460,921. Screw propellers. SCHWARZ, GES., G. Aug. 8, 1935, Nos. 22440 and 22441. Convention dates, Aug. 8, 1934 and Aug. 17, 1934. [Class 114] The blades of a screw propeller are adjustable in pitch in response to the temperature of the surrounding air. The blade 2 has an arm 4 which carries a weight 16 adapted under centrifugal force to tend to alter the pitch of the blade. This arm 4 is connected with an arm 3 on the hub by means of a thermic control device 5. This latter consists of a cylinder 9 filled with liquid and containing piston 10 which is under spring restraint and has an extension in a smaller cylinder 12 communicating with a larger one by passages 14. Changes in the expansion of the liquid within the cylinder due to changes of temperature result in relative movement of the piston 10 in the cylinder 9 and thereby changes the position of the blade. The piston passes through a stopper 13 of elastic material. The thermic control device may be used as at 35 as an adjustable stop limiting the end position of the pitch movement. In this case the device is mounted on an arm 33 on the hub and carries the projection 30 adapted to contact with a projection on the blade. The control may be single acting in which case the other limiting position 39 is fixed, or there may be a thermic control for both end positions. A superposed control is effected by disposing the thermic device 55 adjacent to tubes 57 which can be supplied with heated gases under valve control 48 from the exhaust pipe of the driving motor. In addition another pipe 67 receives cold air under valve control 62 from an inlet 60, open to the atmosphere which is used for passing colder air on to the device when rapid cooling is required. Specification 441,050 is referred to.
GB22440/35A 1934-08-08 1935-08-08 Variable pitch propellers Expired GB460921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE460921X 1934-08-08

Publications (1)

Publication Number Publication Date
GB460921A true GB460921A (en) 1937-02-08

Family

ID=6539804

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22440/35A Expired GB460921A (en) 1934-08-08 1935-08-08 Variable pitch propellers

Country Status (2)

Country Link
ES (1) ES137849A1 (en)
GB (1) GB460921A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096828A (en) * 1961-12-04 1963-07-09 Standard Thomson Corp Fluid control apparatus
US3096827A (en) * 1961-10-02 1963-07-09 Standard Thomson Corp Fluid control apparatus
EP2774842A1 (en) * 2013-01-07 2014-09-10 Hamilton Sundstrand Corporation Propeller blade with relatively movable counterweight

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096827A (en) * 1961-10-02 1963-07-09 Standard Thomson Corp Fluid control apparatus
US3096828A (en) * 1961-12-04 1963-07-09 Standard Thomson Corp Fluid control apparatus
EP2774842A1 (en) * 2013-01-07 2014-09-10 Hamilton Sundstrand Corporation Propeller blade with relatively movable counterweight
US9458730B2 (en) 2013-01-07 2016-10-04 Hamilton Sundstrand Corporation Propeller blade with relatively movable counterweight

Also Published As

Publication number Publication date
ES137849A1 (en) 1935-07-16

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