GB653246A - Improvements in aircraft speed indicators - Google Patents
Improvements in aircraft speed indicatorsInfo
- Publication number
- GB653246A GB653246A GB19321/47A GB1932147A GB653246A GB 653246 A GB653246 A GB 653246A GB 19321/47 A GB19321/47 A GB 19321/47A GB 1932147 A GB1932147 A GB 1932147A GB 653246 A GB653246 A GB 653246A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bellows
- pointer
- arm
- shaft
- aircraft
- 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
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
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
- G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter
- G01P5/17—Coupling arrangements to the indicating device
- G01P5/175—Coupling arrangements to the indicating device with the determination of Mach number
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Steering Controls (AREA)
Abstract
653,246. Aircraft safe-speed indica tors BELL AIRCRAFT CORPORATION. July 18, 1947, No. 19321. Convention date, March. 29, 1944. [Class 106 (ii)] An aircraft instrument comprises a fluid - tight housing 10 and pointers 15, 55 moving over an indicating face 14, the pointer 15 being actuated by means responsive to the difference between impact and static air pressure to indicate airspeed, and the pointer 55 being actuated by means responsive to changes in static air pressure to indicate maximum safe airspeed. As shown, the housing interior has a connection 52 to the static pressure portion of a Pitot-tube device (not shown), and the pointers 15, 55 are actuated respectively by a bellows 40, whose interior has a connection 45, 48 to the impact pressure portion of the Pitot-tube, and a sealed evacuated bellows 80. The shaft 16 for pointer 15 is mounted in a sleeve 18 and has a zero-return spring 19. A pinion 20 on the shaft meshes with a toothed sector 22 pivoted at 24 and carrying a crank-arm 26 which engages an arm 28 extending from a rock-shaft 30. This shaft also carries a crank 34 which engages an arm 36 connected to bellows 40. The bellows action is controlled by a variable resistance spring device 50. The sleeve 18 carries the pointer 55 and is connected by similar transmission mechanism to the bellows 80 which is carried by a rotatable boss 82 connected by an arm 90 and strut 88 to a nut 86 threaded on a screw 85. The screw can be adjusted in accordance with a scale 95 carrying index numbers corresponding to maximum permissible mack numbers for different aircraft.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US653246XA | 1944-03-29 | 1944-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB653246A true GB653246A (en) | 1951-05-09 |
Family
ID=22061917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19321/47A Expired GB653246A (en) | 1944-03-29 | 1947-07-18 | Improvements in aircraft speed indicators |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB653246A (en) |
-
1947
- 1947-07-18 GB GB19321/47A patent/GB653246A/en not_active Expired
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