GB907962A - Improvements in or relating to measuring and/or recording apparatus - Google Patents
Improvements in or relating to measuring and/or recording apparatusInfo
- Publication number
- GB907962A GB907962A GB3939157A GB3939157A GB907962A GB 907962 A GB907962 A GB 907962A GB 3939157 A GB3939157 A GB 3939157A GB 3939157 A GB3939157 A GB 3939157A GB 907962 A GB907962 A GB 907962A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistors
- heat exchanger
- measuring
- function
- resistor
- 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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/40—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the heat developed being transferred to a flowing fluid
- G01N25/42—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the heat developed being transferred to a flowing fluid continuously
Abstract
907,962. Measuring apparatus. ELLIOTT BROS. (LONDON) Ltd. March 18, 1959 [Dec. 18, 1957], No. 39391/57. Class 40 (1). Apparatus for compensating in accordance with a physical quantity the indication or recording of a second physical quantity represented as a function of the values of two resistors 1, 2, comprises means, e.g. a tapped resistor 15 and swamping resistors 13 and 14, for supplying equal constant currents to each of resistors 1 and 2 and applying the difference in potential across these resistors to a series combination of resistors 18, 19 and 12, and measuring the potential developed across 19 and 12, e.g. by a self-balancing potentiometer, the value of resistor 12 being a function of the variable to be compensated for. Measuring the calorific value of a combustible gas.-The gas, in known manner, is applied to a heat exchanger at a volumetric rate proportional to the rate of flow of a liquid to the heat exchanger and is burnt in the heat exchanger. Resistance thermometers at the inlet to and outlet from the heat exchanger are connected at 1 and 2 and compensation for the difference between the ambient temperature and pressure at the time of the test and standard conditions is given by a known form of correction device, Fig. 1 (not shown), involving a resistor of which the value is a function of ambient temperature and pressure and which is connected at 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3939157A GB907962A (en) | 1957-12-18 | 1957-12-18 | Improvements in or relating to measuring and/or recording apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3939157A GB907962A (en) | 1957-12-18 | 1957-12-18 | Improvements in or relating to measuring and/or recording apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB907962A true GB907962A (en) | 1962-10-10 |
Family
ID=10409293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3939157A Expired GB907962A (en) | 1957-12-18 | 1957-12-18 | Improvements in or relating to measuring and/or recording apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB907962A (en) |
-
1957
- 1957-12-18 GB GB3939157A patent/GB907962A/en not_active Expired
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