GB299339A - Improvements in or relating to manometers - Google Patents
Improvements in or relating to manometersInfo
- Publication number
- GB299339A GB299339A GB1940327A GB1940327A GB299339A GB 299339 A GB299339 A GB 299339A GB 1940327 A GB1940327 A GB 1940327A GB 1940327 A GB1940327 A GB 1940327A GB 299339 A GB299339 A GB 299339A
- Authority
- GB
- United Kingdom
- Prior art keywords
- integrating
- resistance
- instrument
- circuit
- 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
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L21/00—Vacuum gauges
- G01L21/10—Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured
- G01L21/12—Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
299,339. Martin, H., and Kent, Ltd., G. July 21, 1927. Tell-tale apparatus. -For integrating the flow of fluids, an integrating device is located in a Wheatstone bridge circuit three arms of which comprise fixed resistances a, b, c and the fourth arm comprises a variable resistance d, the transmitter resistance e which is variable according to the pressure difference across a manometer and the line resistance The ratio coils g, h of an indicator or recorder also may be connected across the circuit. In order to. eliminate temperature errors in the integrating instrument, an electric heater controlled by a. thermostat may be provided within the casing, of the instrument so as to maintain constant the internal temperature. Specifications 139,103 and 260,323 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1940327A GB299339A (en) | 1927-07-21 | 1927-07-21 | Improvements in or relating to manometers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1940327A GB299339A (en) | 1927-07-21 | 1927-07-21 | Improvements in or relating to manometers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB299339A true GB299339A (en) | 1928-10-22 |
Family
ID=10128763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1940327A Expired GB299339A (en) | 1927-07-21 | 1927-07-21 | Improvements in or relating to manometers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB299339A (en) |
-
1927
- 1927-07-21 GB GB1940327A patent/GB299339A/en not_active Expired
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