GB555824A - Improvements in or relating to aircraft instruments - Google Patents

Improvements in or relating to aircraft instruments

Info

Publication number
GB555824A
GB555824A GB508141A GB508141A GB555824A GB 555824 A GB555824 A GB 555824A GB 508141 A GB508141 A GB 508141A GB 508141 A GB508141 A GB 508141A GB 555824 A GB555824 A GB 555824A
Authority
GB
United Kingdom
Prior art keywords
pointer
arm
scale
weight
link
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
GB508141A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB508141A priority Critical patent/GB555824A/en
Publication of GB555824A publication Critical patent/GB555824A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Transmission Devices (AREA)

Abstract

555,824. Aircraft stalling speed indicators FERRANTI, Ltd., and CLUDERAY, E. S. April 19, 1941, No. 5081. [Class 4] For indicating the variations of the stalling speed of an aeroplane a spring-supported weight responsive to accelerations parallel to the normal axis of the aircraft is connected by linkwork, described below, and gearing to a pointer moving over a scale graduated to show air speeds. The instrument may be combined with an air speed indicator having a pointer moving over the same scale and an additional scale may be provided to indicate the values of the accelerations parallel to the normal axis. A weight 1 mounted on a spring 2 is connected by a link 5 to an arm 6 on a spindle 8 carrying a toothed quadrant 9 gearing with a pinion 10 on a sleeve carrying a pointer 12 moving over a scale, not shown. The pointer 12 is frictionally mounted so that it can be initially set to the normal stalling speed of the aeroplane. The initial inclination of the arm 6 to a perpendicular from the spindle 8 to the link 5 is greater than when the weight is subject to additional acceleration so that the square root law of response of the weight 1 to accelerations is balanced by the sine law of the arm 6 to give a substantially linear displacement over the dial. The arm 6 is connected by a link 17 to an air dash-pot 15, 16. A disc 20 marked in multiples of the acceleration due to gravity moves behind a window in the dial. A second pointer 23 is geared to a capsule 33 connected to a pitot tube to indicate actual air speeds on the same scale. An instrument without the second pointer 23 also is described. Specification 539,787 is referred to.
GB508141A 1941-04-19 1941-04-19 Improvements in or relating to aircraft instruments Expired GB555824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB508141A GB555824A (en) 1941-04-19 1941-04-19 Improvements in or relating to aircraft instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB508141A GB555824A (en) 1941-04-19 1941-04-19 Improvements in or relating to aircraft instruments

Publications (1)

Publication Number Publication Date
GB555824A true GB555824A (en) 1943-09-09

Family

ID=9789398

Family Applications (1)

Application Number Title Priority Date Filing Date
GB508141A Expired GB555824A (en) 1941-04-19 1941-04-19 Improvements in or relating to aircraft instruments

Country Status (1)

Country Link
GB (1) GB555824A (en)

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