GB353875A - Improvements in and relating to apparatus for controlling and measuring temperature - Google Patents
Improvements in and relating to apparatus for controlling and measuring temperatureInfo
- Publication number
- GB353875A GB353875A GB12693/30A GB1269330A GB353875A GB 353875 A GB353875 A GB 353875A GB 12693/30 A GB12693/30 A GB 12693/30A GB 1269330 A GB1269330 A GB 1269330A GB 353875 A GB353875 A GB 353875A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- silver
- caesium
- envelope
- discharge device
- 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
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/40—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using ionisation of gases
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
353,875. Thermostats. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Koller, L. R.; 1138, Sumner Avenue, Schenectady, New York, U.S.A.) April 24, 1930, No. 12693. Convention date, April 24, 1929. [Class 64 (ii).] In controlling or measuring temperature in the range 80-150‹ C., an electric discharge device is used, the evacuated envelope of the device containing a cathode having a layer of alkali material emitting an effective thermionic current varying with the temperature. In heating liquids, the discharge device 1, Fig. 4, is inserted into the heat-insulated liquid-container 14 and is connected in circuit with a source 18 of electric current and with a current meter 19. The meter is calibrated to read temperatures or controls the fuel supply to a burner heating the liquid. The discharge device may have a standard four-pin cap 3, Fig. 1, one pin being connected to the central anode 5 and the other pins being dummies. The cathode 4 is coated on the inside of the envelope 1 and is connected to a sealed lead 7. In forming the cathode, silver or platinum may be dispersed on to the glass, or a solution containing silver, platinum or graphite may be painted on prior to depositing silver electrolytically. After baking, the silver is oxidized by a high-voltage discharge in oxygen, the oxygen is removed and caesium or rubidium is then freed by heating by high-frequency currents a capsule 9 containing caesium dichromate and silicon. The cathode so formed may comprise caesium oxides and may be activated by maintaining for several minutes at 200‹ C. In a modification, the cathode is within the envelope and the alkali layer is deposited on a copper, nickel, tungsten molybdenum, silver or silvercoated electrode in the form of a semi-cylinder, a flat plate or several angularly-disposed plates. Specification 303,476, [Class 39 (i), Electric lamps, Arc &c.], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US353875XA | 1929-04-24 | 1929-04-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB353875A true GB353875A (en) | 1931-07-24 |
Family
ID=21882362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12693/30A Expired GB353875A (en) | 1929-04-24 | 1930-04-24 | Improvements in and relating to apparatus for controlling and measuring temperature |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB353875A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3035020A1 (en) * | 2014-12-18 | 2016-06-22 | Palo Alto Research Center, Incorporated | Wireless thermionic sensor |
-
1930
- 1930-04-24 GB GB12693/30A patent/GB353875A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3035020A1 (en) * | 2014-12-18 | 2016-06-22 | Palo Alto Research Center, Incorporated | Wireless thermionic sensor |
US9903767B2 (en) | 2014-12-18 | 2018-02-27 | Palo Alto Research Center Incorporated | Wireless thermionic sensor |
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