GB1247293A - Improvements in or relating to electrical apparatus for recording - Google Patents
Improvements in or relating to electrical apparatus for recordingInfo
- Publication number
- GB1247293A GB1247293A GB3598169A GB3598169A GB1247293A GB 1247293 A GB1247293 A GB 1247293A GB 3598169 A GB3598169 A GB 3598169A GB 3598169 A GB3598169 A GB 3598169A GB 1247293 A GB1247293 A GB 1247293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- engine
- derived
- electrical signal
- time
- 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
- G01P1/00—Details of instruments
- G01P1/07—Indicating devices, e.g. for remote indication
- G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
- G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
- G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/489—Digital circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1,247,293. Electric selective signalling. ROLLS-ROYCE Ltd. 17 July, 1969, No. 35981/69. Heading G4H. In an engine life recorder in which an electrical signal dependent on an operating parameter of the engine is derived, time counters 15a, 15b, 15c, 15d, measure the lengths of time for which the electrical signal lies in predetermined ranges. As described, from an A.C. signal 10 from a tachogenerator driven by a shaft of the engine a D.C. signal is derived in rectifying circuit 14 and predetermined fractions of this signal, determined by potentiometers 20, are compared with a reference signal in detectors 24a, 24b, 24c, 24d, the outputs from detectors associated with higher level signals inhibiting gates 32 associated with lower level signals so that only one gate 32 is enabled to allow clock pulses from generator 40 to be counted in the associated counter 50. Each time the level of the D.C. signal increases to enable a higher level detector an events counter 54 associated with the enabled detector is incremented. The electrical signal may be derived from a different engine parameter, e.g. pressure or temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3598169A GB1247293A (en) | 1969-07-17 | 1969-07-17 | Improvements in or relating to electrical apparatus for recording |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3598169A GB1247293A (en) | 1969-07-17 | 1969-07-17 | Improvements in or relating to electrical apparatus for recording |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1247293A true GB1247293A (en) | 1971-09-22 |
Family
ID=10383653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3598169A Expired GB1247293A (en) | 1969-07-17 | 1969-07-17 | Improvements in or relating to electrical apparatus for recording |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1247293A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2315115A1 (en) * | 1975-06-20 | 1977-01-14 | Lebouder Maurice | ELECTRONIC DEVICE TO CONTROL A ROTATING MACHINE |
US4051720A (en) | 1975-06-18 | 1977-10-04 | Rolls-Royce (1971) Limited | Engine useful life measuring device |
FR2373841A1 (en) * | 1976-12-13 | 1978-07-07 | Gen Electric | RECORDER FOR THE RECORDING OF THE SERVICE PERFORMED BY A GAS TURBINE ENGINE |
-
1969
- 1969-07-17 GB GB3598169A patent/GB1247293A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4051720A (en) | 1975-06-18 | 1977-10-04 | Rolls-Royce (1971) Limited | Engine useful life measuring device |
FR2315115A1 (en) * | 1975-06-20 | 1977-01-14 | Lebouder Maurice | ELECTRONIC DEVICE TO CONTROL A ROTATING MACHINE |
FR2373841A1 (en) * | 1976-12-13 | 1978-07-07 | Gen Electric | RECORDER FOR THE RECORDING OF THE SERVICE PERFORMED BY A GAS TURBINE ENGINE |
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