GB557833A - Variable pitch propeller - Google Patents

Variable pitch propeller

Info

Publication number
GB557833A
GB557833A GB13094/42A GB1309442A GB557833A GB 557833 A GB557833 A GB 557833A GB 13094/42 A GB13094/42 A GB 13094/42A GB 1309442 A GB1309442 A GB 1309442A GB 557833 A GB557833 A GB 557833A
Authority
GB
United Kingdom
Prior art keywords
sleeve
blades
pitch
blade
motor
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
GB13094/42A
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.)
Engineering & Res Corp
Original Assignee
Engineering & Res Corp
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 Engineering & Res Corp filed Critical Engineering & Res Corp
Publication of GB557833A publication Critical patent/GB557833A/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
    • B64C11/44—Blade pitch-changing mechanisms electric

Abstract

557,833. Screw propellers. ENGINEERING & RESEARCH CORPORATION. Sept. 16, 1942, No. 13094. Convention date, Sept. 25. 1941 [Class 114] The pitch of the blades is adjusted under hand control by means of an electromotor and two concentric sleeves 30, 32 having a screw-threaded engagement with each other, and normally rotating together and with the. propeller-shaft. The inner sleeve 32 is held against axial movement, and the outer sleeve is connected to each of the blades by an arm 28 and an eccentric pin 22. The inner sleeve is connected by a flange 36 to the armature 40 of the motor, the housing 66 of which is fixed to the engine. The inner sleeve is normally locked to the propellershaft by a spring-closed clutch including a ring 50, which is splined to the shaft. When the pitch is to be changed, the circuit of the motor is closed by means of a switch 62, which at the same time energizes a solenoid 60 and opens the clutch 50. The sleeve 32 is thereupon driven by the motor under the control of a rheostat 75 at a speed greater or less than that of the outer sleeve 30, which is consequently moved axially and changes the pitch. The two sleeves may be connected by balls located in the screw threads. Either the inner or the outer sleeve may be connected to the blades. The eccentric pin 22 for operating the blade may be replaced by a strap surrounding the root of the blade, or a boss on the periphery of the blade may be connected by a pin and a slot to the arm 28.
GB13094/42A 1941-09-25 1942-09-16 Variable pitch propeller Expired GB557833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US557833XA 1941-09-25 1941-09-25

Publications (1)

Publication Number Publication Date
GB557833A true GB557833A (en) 1943-12-07

Family

ID=22000127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13094/42A Expired GB557833A (en) 1941-09-25 1942-09-16 Variable pitch propeller

Country Status (1)

Country Link
GB (1) GB557833A (en)

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