GB1105526A - Improvements in and relating to electric measuring indicating or control apparatus - Google Patents
Improvements in and relating to electric measuring indicating or control apparatusInfo
- Publication number
- GB1105526A GB1105526A GB19370/64A GB1937064A GB1105526A GB 1105526 A GB1105526 A GB 1105526A GB 19370/64 A GB19370/64 A GB 19370/64A GB 1937064 A GB1937064 A GB 1937064A GB 1105526 A GB1105526 A GB 1105526A
- Authority
- GB
- United Kingdom
- Prior art keywords
- digit
- indicator
- moved
- lines
- variable
- 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
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/40—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements
- G01F23/44—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using electrically actuated indicating means
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/50—Analogue/digital converters with intermediate conversion to time interval
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
1,105,526. Liquid level indicators. K. D. G. INSTRUMENTS Ltd. 9 Aug. 1965 [8 May, 1964]. No. 19370/64. Heading G4H. The value of a variable is indicated by a transducer which generates an electric signal representing the variable, the signal being transmitted over a line to an indicator at a receiving station, the energizing current for the transducer being fed over two lines from the receiver station through a variable impedance used for calibrating the apparatus. The transducer comprises a float 3 in a tank 1 driving an endless tape 4 the upper pulley of which controls switching units 8, 9 and 10 representing successive decades. Each switching unit comprises a rotating magnet adapted to operate one of ten reed switches Sa-Sj to connect the corresponding tapping of potentiometer to Ra-Rj to the signalling line L3. The potentiometer is supplied over lines L1, L2 from the receiving, station. Variable resistors VR2, VR4 are provided in the supply lines and VR5 in the signal line. A stabilized voltage supply to lines L1, L2 is given by Zener diode D1. Another Zener diode D2 gives a stabilized voltage at the other side of the indicator D from the signal line L3. To calibrate the apparatus, the indicator is first disconnected by moving switch SA to the " 0 " position. The mechanical zero adjuster is then moved until the zero digit is properly positioned on the screen. Resistors VR2, VR4, VR6 and VR5 are moved to maximum, zero contact Sj is closed and switch SA moved to read position (R). Resistor VR1 is adjusted to bring the zero to the proper position. Contacts Sa are then closed, corresponding to digit 9 and resistor VR5 adjusted until the 9 digit is properly positioned. These adjustments for 0 and 9 are repeated until both are correct. Switch SA is then moved to the test position and a reference voltage from potentiometer VR3 is adjusted until the digit 9 is properly positioned on the indicator. The ganged resistors VR2 &c. are reduced according to the line resistance RL1, RL2 when the apparatus is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19370/64A GB1105526A (en) | 1964-05-08 | 1964-05-08 | Improvements in and relating to electric measuring indicating or control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19370/64A GB1105526A (en) | 1964-05-08 | 1964-05-08 | Improvements in and relating to electric measuring indicating or control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1105526A true GB1105526A (en) | 1968-03-06 |
Family
ID=10128221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19370/64A Expired GB1105526A (en) | 1964-05-08 | 1964-05-08 | Improvements in and relating to electric measuring indicating or control apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1105526A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2679648A1 (en) * | 1991-07-24 | 1993-01-29 | Schlumberger Ind Sa | ANALOG TRANSMITTER OF POSITION AND DIRECTION OF ROTATION. |
-
1964
- 1964-05-08 GB GB19370/64A patent/GB1105526A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2679648A1 (en) * | 1991-07-24 | 1993-01-29 | Schlumberger Ind Sa | ANALOG TRANSMITTER OF POSITION AND DIRECTION OF ROTATION. |
| EP0525859A1 (en) * | 1991-07-24 | 1993-02-03 | Schlumberger Industries, S.A. | Analogue position and rotation direction transmitter |
| US5252824A (en) * | 1991-07-24 | 1993-10-12 | Schlumberger Industries, S.A. | Analog transmitter of position and direction of rotation having a signal amplitude varies on each change of state of sensors |
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