GB1195471A - Improvements in or relating to Apparatus for Providing a Representation of Engine-Life - Google Patents
Improvements in or relating to Apparatus for Providing a Representation of Engine-LifeInfo
- Publication number
- GB1195471A GB1195471A GB2346968A GB2346968A GB1195471A GB 1195471 A GB1195471 A GB 1195471A GB 2346968 A GB2346968 A GB 2346968A GB 2346968 A GB2346968 A GB 2346968A GB 1195471 A GB1195471 A GB 1195471A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fed
- amplifier
- output
- transistor
- thermocouple
- 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
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
- G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
1,195,471. Transistor amplifying circuits; pulse modulation circuits. SMITHS INDUSTRIES Ltd. 13 Jan., 1969 [l5 Jan., 1968; 17 May, 1968], No. 2234/68. Headings H3T and H4L. [Also in Divisions G1 and G4] A current-to-frequency converter (Fig. 4) comprises a capacitor 43 connected across an amplifier 42 which together integrate the input current. The output is fed to a control circuit 45 which emits a pulse at a predetermined level to cause transistor 44 to conduct and discharge capacitor 43. The output is a sawtooth voltage whose frequency is determined by the input level. Amplifier (Fig. 6).-The signal from a bridge 90, indicating the deviation from a predetermined value of the temperature measured by a thermocouple 51, is fed to a chopper amplifier 93 comprising a double emitter transistor 95 fed with A.C. at terminals 97. The resulting square wave output is amplified at 98 and supplied in parallel to two transistors 100, 101 fed with the same A.C. in opposite phase on their second emitters. The resulting alternate pulses of D.C. are fed to amplifier 104, with smoothing provided by capacitors 107, 108, the output at 52 being proportional to the input signal. Negative feedback via integrating network 109 provides a phase-advance component to compensate for time lag in the operation of the thermocouple 51.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691901226 DE1901226A1 (en) | 1968-01-15 | 1969-01-11 | Device to display the service life of an engine |
US790991A US3527086A (en) | 1968-01-15 | 1969-01-14 | Apparatus for providing a representation of engine life |
SE00399/69A SE353606B (en) | 1968-01-15 | 1969-01-14 | |
FR6900590A FR2000266B1 (en) | 1968-01-15 | 1969-01-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB223468 | 1968-01-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1195471A true GB1195471A (en) | 1970-06-17 |
Family
ID=9735965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2346968A Expired GB1195471A (en) | 1968-01-15 | 1968-01-15 | Improvements in or relating to Apparatus for Providing a Representation of Engine-Life |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1195471A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2181250A (en) * | 1985-10-04 | 1987-04-15 | Semco Instr Inc | Comprehensive turbine engine monitor and recorder system |
WO2008017519A1 (en) * | 2006-08-11 | 2008-02-14 | Siemens Aktiengesellschaft | Method for operating a turbine |
-
1968
- 1968-01-15 GB GB2346968A patent/GB1195471A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2181250A (en) * | 1985-10-04 | 1987-04-15 | Semco Instr Inc | Comprehensive turbine engine monitor and recorder system |
GB2181250B (en) * | 1985-10-04 | 1989-12-06 | Semco Instr Inc | Comprehensive engine monitor and recorder |
WO2008017519A1 (en) * | 2006-08-11 | 2008-02-14 | Siemens Aktiengesellschaft | Method for operating a turbine |
EP1890012A1 (en) * | 2006-08-11 | 2008-02-20 | Siemens Aktiengesellschaft | Method for running a gasturbine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |